AT&T System 25 R2V1 - Reference Manual

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AT&T

555-530-200

lssue 1, June 1988

AT&T SYSTEM 25

R2V1 REFERENCE MANUAL

TO ORDER COPIES OF THIS DOCUMENT REFER TO DOCUMENT NUMBER 555-530-200

Contact:

In Canada call: 800-255-1242

Write:

Every effort was made to ensure that the information in this document was complete and accurate at the time of printing. document will be reissued periodically to incorporate changes.

Your AT&T sales representative, or

Call: 800-432-6600, Monday through Friday between 7:30 am

and 6:00 pm EST, or

AT&T Customer Information Center 2855 North Franklin Road P.O. Box 19901 Indianapolis, Indiana 42619

However, this information is subject to change. This

R2V1 Reference Manual Prepared by System 25 Document Development Group and the AT&T Documentation Management Organization

FCC NOTIFICATION AND REPAIR INFORMATION

AT&T SYSTEM 25

This telephone equipment is registered with the Federal Communications in accordance with Part 68 of its Rules. In compliance with the Rules, following:

MEANS OF CONNECTION

Connection of this telephone equipment to the nationwide telecommunications network shall be through a standard network interface USOC RJ21X jack. Connection to private line network channels requires USOC RJ2GX jack for tie lines or USOC RJ21X jack for offpremises station lines. These can be ordered from your telephone company.

NOTIFICATION TO THE TELEPHONE COMPANY

If the system is to be connected to off-premises stations (OPSs), you must notify the

telephone company of the OPS class of service, OL13C, and the service order code, 9.0F.

Upon the request of the telephone company, inform them of the following:

—

The Public Switched Network “lines” and the Private “lines” to which you will connect the telephone equipment.

—

The telephone equipment’s “registration number” and “ringer equivalence number” (REN) from the label on the equipment.

Commission (FCC)

be advised of the

—

For private line connections, provide the facility interface code, TL31M for tie lines.

You must also specify the service order code, 9.0F.

—

The quantities and USOC numbers of the jacks required.

—

For each jack, provide the sequence in which lines are to be connected; the type lines and the facility interface code and the ringer equivalence number by position, when applicable.

This telephone equipment should not be used on coin telephone lines. Connection to party

line service is subject to state tariffs.

REPAIR INSTRUCTIONS

If you experience trouble with this telephone equipment, contact the AT&T National Service Assistance Center on 1-800-628-2888. The telephone company may ask that you disconnect this equipment from the network until the problem has been corrected or until you are sure that this equipment is not malfunctioning.

RIGHTS OF THE TELEPHONE COMPANY

If your telephone equipment causes harm to the telephone network, the telephone company may discontinue your service temporarily.

If possible, they will notify you in advance. But if advance notice isn’t practical, you will be notified as soon as possible. You will be informed of your right to file a complaint with the FCC.

Your telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the proper functioning of your equipment. If they do, you will be notified in advance to give you an opportunity to maintain uninterrupted telephone service.

HEARING AID COMPATIBILITY

The voice terminals described in this manual are compatible with inductively coupled hearing aids as prescribed by the FCC.

FCC REGISTRATION INFORMATION

Registration Number AS593M-71565-MF-E Ringer Equivalence

0.5A

Network Interface RJ21X or RJ2GX

PRIVATE LINE SERVICE

Service Order Code

9.0F

Facility Interface Code

●

Tie Lines

● Off-Premises Stations

TL31M OL13C

FCC WARNING STATEMENT

Federal Communications Commission (FCC) Rules require that you be notified of the following:

● This equipment generates, uses, and can radiate radio frequency energy and, if not

installed and used in accordance with the instruction manual, may cause interference to radio communications.

● It has been tested and found to comply with the limits for a Class A computing device

pursuant to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment.

● Operation of this equipment in a residential area is likely to cause interference in which

case the user at his or her own expense will be required to take whatever measures may be required to correct the interference.

DANGER

The AT&T System 25 cabinets are not user serviceable. Some voltages inside the cabinets are hazardous. This

equipment is to be serviced only by qualified technicians.

CONTENTS

Section 1—Overview

Section 2—Features and Services Section 3—Functional Description Section 4—Hardware Description Section 5—Technical Specifications Section 6—Environmental Requirements Section 7—Parts Information

CONTENTS

Section 8—Reference Documentation Section 9—Glossary Section 10—Index

OVERVIEW

Introduction Organization System 25 Description

Call Handling Capabilities Safety

Business Communications Needs

Incoming Business Communications Outgoing Business Communications Internal Call Movement Data Communications Growth & Rearrangement Conclusions

1-1 1-1 1-1

1-4 1-4

1-5 1-5 1-7 1-9 1-10 1-13 1-15

-i-

Figures

Figure 1-1. System 25 Block Diagram

1-2

-ii-

OVERVIEW

Introduction

This reference manual provides general technical information on AT&T System 25 (System

25). It includes a description of the system, its hardware and software, features and services, environmental requirements, and technical specifications. This manual is intended to serve as an overall technical reference for System 25.

This manual is released specifically to cover Release 2 Version 1 (R2V1) of System 25. It does not contain information that applies only to the earlier releases of System 25.

Organization

This manual is divided into 10 sections. The remaining sections are as follows:

● SECTION 2—FEATURES AND SERVICES

● SECTION 3—FUNCTIONAL DESCRIPTION

● SECTION 4—HARDWARE DESCRIPTION

● SECTION 5—TECHNICAL SPECIFICATIONS

● SECTION 6—ENVIRONMENTAL REQUIREMENTS

● SECTION 7—PARTS INFORMATION

● SECTION 8—REFERENCE DOCUMENTATION

● SECTION 9—GLOSSARY

● SECTION 10—INDEX.

System 25 Description

System 25 is an advanced digital switching system that integrates voice and data communications. (See block diagram in Figure 1-1.) It not only provides the features of a state-of-the-art Private Branch Exchange (PBX), but goes a step further by allowing data to be switched point-to-point without first being converted to analog format. This capability can be used to set up connections between data terminals, word processors, personal computers, and host computers. distributed network processor elements to provide (essentially) nonblocking voice and data switching.

System 25 uses intelligent port circuits equipped with

1-1

OVERVIEW

CALL ACCOUNTING SOFTWARE OR

SMDR PRINTER

SYSTEM ADMINISTRATION TERMINAL OR

MS-DOS PC WITH ADVANCED ADMINISTRATION

DIGITAL TAPE UNIT OR

MS-DOS PC WITH ADVANCED ADMINISTRATION

TRUNK FACILITIES

● DID

● FX

● TIE

● WATS

● CO

● AUXILIARY-DICTATION

PAGING

EQUIP

SINGLE-LINE VOICE TERMINAL

MULTILINE VOICE TERMINAL

DIRECT TRUNK

ATTENDANT CONSOLE OR

SWITCHED LOOP

ATTENDANT CONSOLE

RS232

ANALOG

HYBRID

CONTROL COMPLEX

SWITCHING

NETWORK

INTEGRATED SOLUTION

RS232

●

ADVANCED ADMINISTRATION

●

CALL ACCOUNTING SOFTWARE

●

OFFICE AUTOMATION SOFTWARE

●

VOICE MESSAGE SYSTEM WITH

- AUTOMATED ATTENDANT SERVICE

- CALL COVERAGE SERVICE

- VOICE MAIL SERVICE

- ANNOUNCEMENT SERVICE

ANALOG

- MESSAGE DROP SERVICE

STATION

DATA

ASYNCHRONOUS

DATA UNIT

ANALOG

MODEM

STARLAN NETWORK GATEWAY

RS232

HOST COMPUTERS

TERMINALS

PRINTERS

RS232

MODEMS DIGITAL DEVICES

STARLAN NETWORK WORKSTATIONS

STARLAN NETWORK PRINT AND FILE SERVERS

STARLAN NETWORK HOSTS

●

MUSIC SOURCE

●

EXTERNAL ALERT

●

RECORDED

ANNOUNCEMENT

● DICTATION

EQUIPMENT

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RIMS ACCESS

ANALOG

ANALOG TRUNK

Figure 1-1.

HYBRID

WITH CALL MANAGEMENT SYSTEM

System 25 Block Diagram

MS-DOS PC

OVERVIEW

Voice communications features combine traditional telephone features, such as Transfer and

Hold, with advanced features, such as Individual and Group Coverage, Hands-Free Answer

On Intercom, and Speed Dialing (see Section 2, “Features and Services”).

Data communications features provide switched data connections supporting transmission of

voice and data over Premises Distribution System wiring.

Data connections can be made between two digital data modules (asynchronous data units), between two analog modems, or between an analog modem and a digital data module. System 25 also provides access to STARLAN NETWORKs (Release 2 of STARLAN only). The system has data modules that provide an RS-232 interface for full duplex, asynchronous, transmission of data up to 19,200 bps, and an integrated 212A-compatible modem pool resource.

System 25’s Integrated Solution offers customers a unique package of integrated call management, switch management, and office automation applications.

The Integrated

Solution is a set of application programs that run on a Master Controller (UNIX® PC). The

applications include Advanced Administration Software (AAS), which permits customers to

administer System 25’s features themselves;

Call Accounting System (CAS); and an

integrated Voice Message System (VMS) that provides call coverage, leave word calling,

automated attendant, and voice mail services. In addition, a number of generic office automation applications (word processing, data base management, and spreadsheet) are also available for the Integrated Solution; these applications may be run simultaneously with the VMS and CAS applications.

System 25 supports the following:

● Trunk and Network Facilities—

Signaling on incoming and outgoing trunks (dial pulse only on DID trunks).

— Loop Start (LS) — Ground Start (GS) (Strongly Preferred over Loop Start in most installations) — Tie Trunks (Type I and Type I Compatible E&M, Type V Simplex) — Direct Inward Dialing (DID)

● Voice Terminals —

Single-Line Touch-Tone, Single-Line Rotary, MET, and 7300H

Series Multiline Sets from the MERLIN® Communications System.

● Data Facilities

— Digital Data End Points — RS-232 Interfaces via Asynchronous Data Units — Analog Data End Points —

— STARLAN NETWORK Access (Release 2 of STARLAN only).

Dual Tone Multifrequency (DTMF) and Dial Pulse

Tip/Ring-Type Modem Interfaces

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OVERVIEW

● Networking Capability

— Remote Access — Tie Trunks

— Tandem Trunking

— Endpoint in Electronic Tandem Network (Tributary only, not Satellite) — Endpoint of Enhanced Private Switched Communications Services (EPSCS) — Endpoint of Tandem Tie Trunk Network (TTTN)

— Endpoint of Common Control Switching Arrangement (CCSA).

Call Handling Capabilities

System 25 can be arranged as a stand-alone system or can be part of a private network.

The system provides 256 ports to support the following:

● 115 simultaneous two-party conversations

● Traffic Handling Capacity of 4140 CCS (Trunking Limited)

● Busy Hour Call Capacity of 2500 calls (DTMF Register Limited)

● Up to 104 trunk ports including Central Office (CO), DID, Tie, Foreign Exchange (FX),

Wide Area Telecommunications Service (WATS), and 800 Service

● An Auxiliary Trunk interface for paging and dictation systems

● Up to 240 ports that support a combination of the following:

— Up to 200 ports for voice terminals and auxiliary feature port equipment. — Up to 104 data ports providing RS-232 connections to data terminals,

personal or multiport computers.

Refer to Hardware and Software Parameters as provided in ''Technical Specifications” (Section 5) for detailed specifications.

Safety

System 25 meets all requirements found in Underwriters Laboratories Standard for Telephone Equipment (1459).

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OVERVIEW

Business Communications Needs

The remainder of this section describes how System 25’s features may be used to satisfy a

customer’s communications needs. This material may be thought of as the reverse of the “Features and Services” in Section 2.

The business communications capabilities of the majority of small businesses with more than 30 phones are provided by a PBX. System 25 is a PBX designed to meet the business communications needs of customers in the 30 to 150 station range.

The communications needs of most business customers may be broken down into five basic categories. Customer experience has shown that a PBX needs to provide—

● Prompt handling of incoming calls to maximize revenue opportunities and client

satisfaction,

● Ease of access to and cost control of outgoing calls over public network and private

facilities,

● Easy movement of calls between on-premises phones and between on-premises and

off-premises phones,

● Sharing of data between PCs and/or host computers and data terminals, and

● Growth and rearrangement of facilities.

The following pages outline System 25’s outstanding ability to provide these services.

Incoming Business Communications

Successful call termination is the key to capturing all incoming communications associated with revenue issues, client inquiries, decision data, etc. Call termination involves identifying the called party and routing the call to a primary or secondary answering position. System 25 provides powerful tools for both call screening and call termination.

● Attendant Consoles allow one or two attendants to answer, screen, and steer

incoming calls using either Direct Trunk or Switched Loop operation. With attendant operation, incoming calls can be screened and extended to the appropriate party for resolution or forwarded to alternate locations, and messages can be taken for absent clients. Calls may arrive over any of the network facilities described in later sections of these notes.

● System 25’s Integrated Solution can provide Automated Attendant service, either

reducing the volume of calls your attendant needs to handle or providing off-hour attendant service.

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OVERVIEW

● Direct Inward Dialing allows incoming callers to reach specific individuals or facilities

without attendant assistance.

This allows specific numbers to be advertised for direct customer access to brokers, emergency services, etc., over a shared pool of DID trunks.

● The Call Management System provides Automatic Call Distribution (ACD) service and

associated call traffic and agent performance reports.

● Direct Group Calling (DGC) allows incoming calls to be directed to a specific group of

stations. Calls to a DGC group hunt for an idle station in a circular manner, starting at the station following the last one called. If all group members are busy, calls are

queued and can be sent to a delay announcement. A DGC group can terminate calls to sales, services, computer, announcement, etc., over either ordinary CO trunks or

DID trunks.

● Personal Lines provide dedicated outside lines for multiline voice terminal users and

are accessed via a dedicated button for both incoming and outgoing service. Up to

16 terminals may share a Personal Line with up to 4 parties simultaneously off-hook.

A personal line provides direct access to brokers, emergency service, etc., over a dedicated loop start or ground start trunk.

● Call Waiting lets users know that they have another incoming call and helps avoid

missing important calls.

● Remote Access allows employees to use the services and facilities of System 25

from home or when they are on the road. Barrier codes prevent unauthorized access.

Frequently, the called party is not available to handle an incoming call. System 25 provides a number of methods for redirecting incoming calls to alternate resources.

● Coverage allows calls that are not answered within a specified number of rings to be

redirected to an individual covering station and/or a group of covering stations. This is especially useful for Boss-Secretary arrangements, staff backup, and message service.

This feature is versatile enough to permit suitable alternate answering arrangements for virtually every level of employee. Special features, such as the Send All Calls feature which routes a user’s calls directly to covering station(s), accommodate the day-to-day variations that occur in an employee’s work schedule.

● Following and Forwarding allow users who are away from their normal locations to

receive their calls at other phones inside the system or (Forwarding only) outside the system. This feature supports roving personnel and shared office space for company staff.

● The Integrated Solution can provide call coverage service, along with integrated voice

mail and Leave Word Calling.

● The Bridging feature permits calls on a user’s System Access buttons to be

answered at another station on Bridged Access buttons.

1-6

OVERVIEW

● Station Hunting provides automatic redirection of incoming calls to an idle member of

a hunt group when the called party is busy.

● Pickup allows a user to answer a call ringing at another terminal. Directed Pickup

allows a user to answer a call ringing at any terminal by dialing the pickup code and

the Personal Dial Code (PDC) of the ringing station. Group Pickup permits calls to

any other terminal in the pickup group to be answered by dialing the group call pickup code. With Pickup, users do not have to leave their phone to answer other’s calls. This feature is especially useful for local coverage in group offices not supported by secretarial service and equipped with economical single-line phones.

When alternate resources are not available to handle an incoming call, System 25 provides

for attendant handling of the call utilizing camp-on, redirection, and/or message service.

● Camp-On allows the attendant to extend an outside call to a busy station. A burst of

tone is heard at the called station to notify the user of the camped-on call. The caller

is placed on hold and hears music-on-hold, if available. When the user hangs up, the

camped-on call begins ringing immediately. The Return Coverage on Busy feature

returns unanswered camped-on calls to the attendant for service after a specified interval.

● Return Coverage on Don’t Answer returns unanswered attendant-extended calls for

additional service (redirection/messaging).

● Messaging Service supports activation of a light-emitting diode (LED) at the called

station to indicate that the attendant, message desk, or another station has a message for the user.

Special arrangements are needed to handle incoming calls during periods when the normal staff is not available, for example, at night and on weekends. System 25’s Night Service feature allows on-duty personnel to answer incoming attendant-seeking calls when the attendant is not on duty. Directed Night Service redirects incoming attendant-seeking calls to designated voice terminals, such as a guard desk or coverage position. Trunk-AnswerFrom-Any-Station (TAAS) Night Service allows users to answer incoming calls from any station by dialing the Night Service access code. Night personnel can be alerted by a night bell.

Outgoing Business Communications

One of the key functions of a customer premises communications system is to provide easy access to the most cost effective network facilities for outgoing calls. The system needs to be capable of steering calls based on cost, and must also keep records of incoming and outgoing calls and associated costs.

Building on its ground start trunk capability, System 25

features control costs and record usage as follows.

● Call Restrictions allow the manager to restrict users from making certain types of

calls. Restriction is administered through outward restriction, toll call restriction, and facility access restriction.

1-7

OVERVIEW

● Automatic Route Selection provides manager defined routing of calls over the

telecommunications network based on preferred routes (normally the least expensive

route available at the time the call is placed) with capacity for multiple common

carriers and routing through tandem switch points.

The user dials a standard Direct

Distance Dialing (DDD) number and the system selects the call route.

● Station Message Detail Recording (SMDR) generates detailed call information on all

incoming and outgoing calls and sends this information to an output device (PC or printer).

● Call Accounting Systems provide multiple types of customer reports on

communication costs and usage.

● Account Code Entry allows a user to associate calls with an account code for

charge-back purposes. This feature can be administrated (on a per-station basis) to force the entry of the required codes before outgoing calls can be made.

Ease of access to multiple types of network facilities (provided for minimum cost) is managed by the following features.

● Automatic Route Selection (ARS) allows the customer to dial a standard DDD

number. ARS selects the preferred route and does any number conversions required for the facilities selected.

● System 25’s Virtual Facility feature provides convenient and inexpensive access to

Other Common Carriers (OCCs). This feature provides access to OCC facilities over a user specified physical facility; dedicated OCC trunks are not needed. Local OCC access numbers and account codes are automatically added by System 25. System 25’s Virtual Facility feature is fully integrated with its ARS, Toll Restriction, and SMDR/CAS features.

● Callback Queuing provides a simple way to complete calls to busy trunk pools

without having to manually repeat the calling procedures. Such calls are put into a queue; when the busy facility is available, the originator is alerted and the call is completed.

● Last Number Dialed automatically saves the last number dialed and allows the user

to retry the number without redialing (multiline voice terminals only).

● Callback Queuing puts a call made to a busy facility into a queue, notifies the calling

user when the facility becomes available to receive the call, and completes the call.

● Repertory Dialing allows multiline voice terminal users to store a telephone number

or account and associate that number with a button on their voice terminal. Pressing a Repertory Dialing button is equivalent to dialing the stored number (one-touch dialing).

● System Speed Dialing allows all users to dial 90 selected numbers using 3-digit

codes. Users can also program up to 20 Personal Speed Dialing Numbers, which are accessible only from their terminals. System Speed Dialing can be used by the system administrator to hide business account codes from users.

1-8

OVERVIEW

● Pooled Facility-Dial/Direct Access allows both multiline and single-line voice terminal

users to access a common pool of trunks for outgoing calls by dialing a facility access code, or, on multiline voice terminals, by pressing a button. This grouping provides resource pooling, which results in better service with a given number of

trunks.

● Personal Lines provide dedicated outside lines for multiline voice terminal users.

Personal lines are accessed via a dedicated feature button. Up to 16 terminals may

share a personal line.

● Third-Party Call Setup allows PCs to set up calls between a System 25 voice/data

terminal and any other facility. A PC application program could use this capability to

retrieve information from a data base.

Last Number Dialed, Repertory Dialing, and Speed Dialing are also applicable to dialing and managing internal calls. Personal lines provide both incoming and outgoing service.

Internal Call Movement

Typically, about 40 percent of PBX calls are internal calls, call transfers to another location, conference of multiple locations, temporarily suspended calls, page to locate the called party, etc. Rapid placement of internal calls and easy call movement from the answering station to a new station are supported with numerous features in System 25.

To provide easy internal call setup, System 25 provides the following

● Direct Station Selection (DSS) allows one-button access

terminal to another voice terminal, a pooled facility, paging zone, or DGC group. The DSS status LED reflects the idle/busy status of the associated termination point.

This feature is used to track and contact frequently called associates.

● Automatic Intercom allows multiline voice terminal users to call each other by use of

a dedicated line appearance. A private dedicated path ensures that a path is always available. This feature is frequently used in Boss/Secretary arrangements.

● The Dial Plan for System 25 is based on the concept that, whenever possible, calls

should be placed to individuals rather than to pieces of equipment. To implement this concept, individuals are assigned PDCs and are allowed to sign in those PDCs at other terminals. The system automatically routes the call to the home terminal or signed-into terminal. This significantly increases the probability of reaching the called party. In addition, the Dial Plan is built on a flexible numbering scheme that allows the number of dialed digits to match assigned PDCs (2/3/4 digit dial plans) and to be administered to match telephone company assigned Direct Inward Dialing numbers.

features.

from a multiline voice

1-9

OVERVIEW

Efficient internal call termination is supported with the following features.

● Distinctive Ringing provides various patterns of ringing to allow users to distinguish

outside calls, inside calls, callbacks on queued calls, and calls set up at an associated data terminal.

● Hands-Free Answer on Intercom (HFAI) allows Speakerphone and HFAI terminals to

auto-answer inside or attendant extended calls. With HFAI active, the set generates a tone burst over its speaker to alert the calling and called party of the call completion. Both parties may then converse;

no action by the called party is

required.

Frequently, the first termination point for a call is not its final destination. To support internal call movement, System 25 provides the following features.

● Bridging of System Access and Personal Lines allows calls to be passed in a manner

that key system users are familiar with.

● Transfer allows a user to transfer any call to another voice terminal. This feature

supports transfer of calls from the answering position to another location for completion of a transaction. Examples are secretary to boss, office to lab, broker to specialist, etc.

● Conference allows up to five parties (maximum two outside), including the originator,

to participate in a call. This feature supports add-on of additional parties to a call for joint consultation, crisis management, schedule coordination, etc.

● Hold allows a user to suspend a call. The Hold feature allows users to temporarily

disconnect from one conversation and either place or answer another call. Music or

information bulletins may be provided to the held party. Called parties frequently use the hold period to access computer data bases, search categories, and/or consult with others via a second phone call.

● Following and Forwarding provide users with ways to answer their incoming calls

while temporarily away from their home terminals.

● Park allows a user to place a call or conference on hold and then pick up the call

from any voice terminal. The user can page another party to pick up the parked call or may move to another location and then re-access the call.

Data Communications

Small Business customers have started to integrate PCs into their day-to-day business operations.

Businesses have found a need to access the data bases (sales, inventory, personnel) in these PCs from more than one location (both on- and off-premises). System 25 data features are specially engineered to enhance a user’s ability to access data from multiple locations. System 25 has been designed to help these businesses use their personal computers, data terminals, and host computers more effectively by providing the

1-10

OVERVIEW

following features.

● Circuit switched data communications up to 19,200 bps (RS-232 interface) provide

circuit switched connections from asynchronous data terminals, PCs, or host computers to host computers or network facilities. Users can be located and/or moved to any on-premises office equipped with the standard AT&T 4-pair wiring plan. Thus an asynchronous terminal or PC can have access to multiple host computers,

remote data bases via a modem pool, and a local area network (STARLAN) via

System 25’s STARLAN NETWORK gateway.

● Packet switched data connections at 1 million bps over AT&T’s STARLAN NETWORK

local area network provide data transfer between client PCs and servers (PCs/host computers/printers, etc.) on the local area network (LAN). LAN users can be located and/or moved to any on-premises office equipped with standard AT&T 4-pair wiring. The LAN allows PCs to share facilities (printers, disk systems, modem pools, etc.).

● System 25’s STARLAN NETWORK ACCESS software and STARLAN NETWORK

gateway provide access to the STARLAN NETWORK for off-premises and occasional on-premises users. These users do not need to install a Network Access Unit (NAU) in their PCs to use the STARLAN NETWORK ACCESS software. The data transfer rate is limited to 9600 bps or, for off-premises users, by the modem.

Note:

System 25 is compatible only with Release 2 of the STARLAN NETWORK.

LAN users can access hosts connected to System 25, or, if their System 25 is

equipped with a modem pool, remote hosts.

Finally, terminals and PCs connected to

System 25 data ports can access host computers on the LAN.

Frequently a user needs to access a LAN data base at or from a remote location (home, motel, client office, branch, etc.). To support out-of-building access to computer data over network facilities or Off-Premise Station (OPS) lines, System 25 provides the following

features.

● Modem pooling allows data terminals to communicate over analog facilities utilizing

the standard dialing plan and provides full access to all network facilities, cost control mechanisms, ARS, and incoming call management tools (DID/attendant/DGC, etc.).

● Transfer to data allows a data call to be set up on a voice terminal and then to be

transferred to a data terminal or computer, This feature can also be used to enter an account code for the data call.

● The System 25 STARLAN NETWORK gateway allows the LAN environment to be

extended to occasional users or remote locations. Off-premises users can access the LAN utilizing all the network features, cost control mechanisms, and incoming call management facilities of System 25. The data transfer rate is governed by the modem.

Setting up data communications with PCs, host computers, and/or remote access can be a source of confusion for occasional users. The following special data features are provided by System 25 to assist the user in utilizing its rich set of data communications capabilities.

1-11

OVERVIEW

● The integrated voice-data dialing plan recognizes the different types of data

endpoints (digital/ analog and remote/Iocal) in a connection and automatically inserts the required data communication equipment.

In addition, autobauding supports the

alignment of equipment with the capacity to transmit at different data rates.

● Station Hunting supports the use of a single dial code to access a group of host

computer ports.

● Terminal Dialing provides the user with fast access to data communications via

keyboard dialing at a terminal or PC.

● Command Mode provides a menu of data services supporting terminal dialing and

display and control of user data port options.

A user friendly Change Options menu

is provided for user administration of data options.

● Expert Mode is an enhancement that provides an alternative method of accessing

Command Mode functions. It eliminates the display of menus and allows multiple commands to be entered on a single line.

Expert mode is suitable for use with

computer-driven scripts for call setup.

● Communication Access Manager (CAM) is an MS-DOS* software application that

provides a phone manager for placing voice and data calls for the user and VT100† terminal emulation. CAM may be used on either STARLAN NETWORK client workstations or on PCs connected to System 25. CAM has a 200-entry directory with one-touch dialing for both voice and data calls and auto-login capability for data calls to host computers.

CAM’s Remote Access feature provides password

protected unattended access to PC files and electronic mail. File transfer is supported with the popular XMODEM protocol.

● STARLAN NETWORK ACCESS is an MS-DOS software application that allows PCs

not connected to the STARLAN NETWORK to call through the System 25 STARLAN

NETWORK Interface and run STARLAN NETWORK client software to access file and

printer servers

on the STARLAN NETWORK. ACCESS uses a PC’s serial communications port to communicate with the STAR LAN NETWORK Interface. ACCESS is compatible with NETBIOS, permitting execution of most applications written for the IBM‡ PC Network and IBM Token Ring Network.

Registered trademark of Microsoft Corp.

† Trademark of Digital Equipment Corp. ‡ Trademark of International Business Machines Corp.

1-12

OVERVIEW

Growth & Rearrangement

Historical data indicates that clients in the System 25 station range have a need for communications systems capable of significant growth and rearrangement. Clients need flexibility over the life of the system to easily add capacity, move stations, modify cost control options, etc.

The architecture of System 25 was implemented with the objective to meet this

need.

● Advanced Administration (optional) is an easy-to-use,

menu driven personal computer software package for configuring the rich set of system options. Versions of this software are available for both MS-DOS and UNIX personal computers.

● Uniform Wiring Plan (four-pair) allows a building to be prewired for the rich set of AT&T

Small Business PBX service offerings. This modular wiring plan supports client reconfiguration of an office with variations in station type (Analog, MET, MERLIN Communications System, futures) and

data configurations (LAN, asynchronous,

synchronous). It supports simultaneous voice and data from standard 4-pair modular jacks.

● System 25/75/85 Standard Architecture supports efficient growth with modular cabinets,

universal carrier slots, nonblocking network, and uniform wiring plan. Every circuit slot in the system can be used for trunk cards or voice/data station cards. All these attributes allow the client to add future capability without breakage and re-engineering of existing equipment. Thus, the client is able to minimize initial investment while not restricting future growth.

Over time, the type of tools and facilities that a business utilizes changes. It is important that a PBX provide support for the full set of telephone company network options over its installed life, even when only a subset is initially used. Trunks link two switching systems, such as System 25 and the local Central Office or System 25 and another PBX. System 25 supports five different telephone company trunk interfaces to provide desired connectivity at minimum expense. Thus the opportunity exists to select the best trunk types, depending on tariffs and customer needs. For example:

● Loop Start (LS) trunks for public network access at minimum tariff. These trunks

handle outgoing and incoming attendant calls, incoming DGC calls, outgoing pooled facility calls, and personal line calls.

● Ground Start (GS) trunks for public network access. These trunks handle the same

type of calls as LS trunks. They provide protection against call reorigination without toll restriction, more reliable automatic route selection, virtual facilities, SMDR, and CAS. Simultaneous incoming and outgoing call seizure of the same trunk under heavy traffic conditions is essentially eliminated with ground start trunks. GS trunks should usually be selected in preference to LS trunks unless tariff considerations are overriding. Note, however, that Centrex Service requires LS trunks.

● Direct Inward Dialing (DID) trunks for dialing a station directly from outside (attendant

assistance not required).

Outside dial access to stations, trunks (optional), and

answering groups (Direct Group calling) is provided.

1-13

OVERVIEW

● Tie Trunks for linking PBXs with dedicated private circuits for high volume calling.

Dial access to stations, other trunks, answering groups (Direct Group Calling), and an Electronic Tandem Network endpoint capability are provided.

● Off-Premises Stations (OPS) allow a single-line voice terminal to be located remotely

and connected to System 25 via arrangements with the local telephone company. This service is used to provide users at secondary sites (or their residences) many of the same features as an on-premises single-line station.

To enhance the usage and control of the above set of network facilities, System 25 provides the rich set of access features outlined in the Outgoing Business Communications section. In addition, System 25 can support networking between systems by:

● Serving as an endpoint on an electronic tandem network (ETN) using its tie trunks

and flexible dialing plan.

● Serving as an off-network or on-network access point with its dial access/transfer

between tie trunks and telephone company trunks (LS/GS/DID). This allows usage of tie trunks to reach a distant System 25 and then connect through that System 25 to local telephone company facilities to complete the call.

To support efficient utilization of trunks, they can be grouped together (up to 16 groups) if all trunks in the group perform

the same function. This resource pooling provides better service

with a given number of trunks, and simplifies administration and calling. Types of trunks that can be assigned in System 25 are as follows.

Central Office, which provide a link with the local telephone company for incoming and outgoing calls (LS/GS)

Foreign Exchange (FX), which connect to a CO other than the local CO for high volume calling to/from a distant location

Wide-Area Telecommunications Service (WATS), which connect to an Outward WATS office or a dial “800” Service Office

Direct Inward Dialing (DID), which provide incoming service from a CO to directly access a station or facility (STARLAN NETWORK interface, trunk group)

Tie, which provide a link with another private switching system.

To support efficient utilization of this rich set of network options, System 25 provides the functions outlined in the Incoming and Outgoing Business Communications sections.

1-14

OVERVIEW

Conclusions

System 25 has been targeted at providing excellent small business communications

capability at the right price. The thousands of systems in service in the first 2 years of

production have confirmed that these capabilities are an excellent match with small business

customers’ communications needs.

1-15

FEATURES AND SERVICES

Introduction

Account Code Entry, Forced Account Code Entry, Optional Attendant Call Extending Attendant Camp-On Attendant Cancel Attendant Console, Direct Trunk Attendant Console, Switched Loop Attendant Direct Extension Selection

Attendant Forced Release (SLAC Only) Attendant Join (SLAC Only) Attendant Message Waiting Attendant Position Busy

2-1 2-8 2-11

2-14 2-16 2-18 2-19

2-24 2-34 2-39 2-40

2-41 2-43

Attendant Release

Attendant Return Coverage On Busy Attendant Return Coverage On Don't Answer Attendant Source and Destination (SLAC Only) Attendant Splitting One-Way Automatic Attendant System Alarm Indication Automatic Intercom Automatic Route Selection (ARS) Bridging of System Access Buttons Busy-To-Idle Reminder

2-46 2-48 2-50 2-52 2-53

2-54 2-55 2-57

2-67

2-74

-i-

Call Accountability

2-75

Call Accounting System (CAS)

Callback Queuing Calling Restrictions Call Management System (CMS) Call Progress Tones Call Waiting Command Mode Communications Access Manager (CAM) Conference Conference Drop Coverage, Group Coverage, Individual

Data Call Setup

2-76 2-81 2-88 2-91 2-94 2-95 2-97 2-101

2-103 2-106 2-108 2-114

2-117

Data Services Overview Data Terminal Dialing Dial Access to Message Waiting Indicators

Dial Plan

Dictation System Access

Digital Tape Unit (DTU)

Direct Group Calling (DGC)

Direct Group Calling Delay Announcement

Direct Inward Dialing (DID)

Introduction

FEATURES AND SERVICES

This section describes the System Features,

Station Features, Network Features, Data

Features, and Attendant Features of AT&T System 25. It also covers certain services that support and implement the features; included in this category are the digital tape unit, the dial plan, system administration, and system maintenance. A general discussion of data topics is also provided.

The feature descriptions are arranged in alphabetical order, regardless of the feature group

to which they belong.

following five subheadings: Description, Requirements, and Hardware Requirements. Headings that are

● Description

Defines the feature, describes what it does for the user,

● Considerations

Discusses the applications parameters and factors to be

● Interactions

Information for each feature is presented under one or more of the

Considerations,

Interactions, Administration

not applicable are omitted.

and how it is used.

and benefits of the feature,

followed by feature

considered when the feature is used.

Lists and briefly describes other features that can affect the feature being described. Interacting features are those that:

— Depend on each other—

One of the features must be provided if the other

one is. — Cannot coexist—One of the features cannot be provided if the other one is. — Affect each other—The operation of one feature modifies, or is modified by,

the operation of the other. — Enhance each other—The features, in combination, provide improved service

to the user.

●

Administration Requirements

States whether or not administration is required and lists items requiring

administration.

●

Hardware Requirements

Lists any additional hardware needed to use the feature.

2-1

FEATURES AND SERVICES

Symbols Used in Illustrations

Many feature descriptions in this section contain illustrations of equipment and connections. In the connection figures, modular jacks are shown as triangles; 25-pair cable connectors are indicated by shaded blocks. does not have symbol designations.

jack that provides cutdown connections for building (station) wiring.

Feature Tables

Tables 2-A through 2-E list all the features of System 25. Each feature is specified as Standard or Optional.

Standard features are built into the system. They are always provided but may require administration to make them operational. tables by the letter S.

Unterminated wiring that requires cutdown or other termination

The 103A Connecting Block is a typical modular wall

Standard features are identified in the feature

Optional features require both administration and additional equipment. Music-On-Hold is an example. Optional features are identified by the letter O.

Bracketed words in the tables are the standard labels of the associated feature buttons.

These labels are also used in the feature descriptions.

2-2

FEATURES AND SERVICES

System Features

System features (Table 2-A) are those that affect the entire operation of the system.

Table 2-A.

FEATURE NAME

Call Accounting System (CAS) Call Management System (CMS) Dial Plan Dlctatlon System Access

Digital Tape Unit Direct Group Calling Direct Group Calling Delay Announcement End-to-End Signaling

Extended Stations External Alerts

Integrated Solution

Intercept Treatment With Reorder Tone Interdigit Timeouts

Music-On-Hold Night Service (Directed and TAAS)

Night Service Delay Announcements Out-Of-Building Stations

Paging System Access Personal Dial Codes Pooled Facility-Dial Access

Power Failure Transfer Remote Administration Interface Remote Initialization and Maintenance Services (RIMS) Station Message Detail Recording (SMDR)

System Administration

System Maintenance Touch-Tone and Dial Pulse Service deice Message System

System Features

FEATURE

TYPE

O O

O O O S

S/O*

O O

O S S

O O S O

S S

* S/O - Standard for Directed, Optional for TAAS Night Service.

2-3

FEATURES AND SERVICES

Station Features

The many Station Features (Table 2-B) available allow individual user needs to be met. As these needs change, assigned features can also be changed. Station Features provide

many

important services that help save time and make calling more convenient.

Table 2-B. Station Features

FEATURE NAME SINGLE-LINE

Account Code Entry, Forced (FACE) Account Code Entry, Optional Automatic Intercom [AUTO ICOM] Bridging of System Access Buttons Busy-to-Idle Reminder x Callback Queuing Calling Restrictions Call Accountability Call Progress Tones Call Waiting Conference Conference Drop Coverage-Group Coverage-lndividual Dial Access to Message Waiting Indications x Direct Station Selection (DSS) Directory [DIRECTORY] Display [SCROLL] Distinctive Ringing x x Exclusion [EXCLUSION] Following Forwarding Hands-Free-Answer On Intercom (HFAI) [AUTO ANS] Headset Adapter Adjunct Hold Inspection Last Number Dialed [LAST # DIALED] Leave Word Calling (LWC) x [LEAVE WORD] Line Selection Line Status And l-Use Indications Local Display Manual Signaling [SIGNAL] Messaging Services Park Personal Lines Pickup Pooled Facility-Button Access

TERMINAL BUTTON LABEL

x x

x x x x x x

x x

x x x

x x [HOLD]

x x x

MULTILINE TERMINAL FEATURE

[ACCT ENTRY]

[CONFERENCE] [DROP]

[COVER-GRP] [COVER-IND]

[DSS] or [FLEX DSS]

[INSPECT]

[LOCAL]

[PERS LINE] [FACILITY]

TYPE

S S S S S S S S S S

S S

S S S

O O S S

S S O O S O S O S S O S S S S S S

2-4

Table 2-B. Station Features (Contd)

FEATURES AND SERVICES

FEATURE NAME

Program Recall Repertory Dialing Send All Calls Speaker (Spokesman Service) Speakerphone Adjunct

Speed Dialing

Station Hunting

Station-To-Station Message Waiting [MSG WAIT] Test Transfer Trunk-To-Trunk Transfer x x

SINGLE-LINE

TERMINAL BUTTON LABEL

x x x

x x x x

MULTILINE TERMINAL

[REP DIAL] [SEND ALL CALLS] [SPEAKER]

[TRANSFER]

FEATURE

TYPE

S S S S S O S S S S S S

Network Features

This group of features (Table 2-C) supports communications with the public network and with other locations in the private network of which System 25 can be a part.

Table 2-C.

FEATURE NAME

Network Features

FEATURE

TYPE

Automatic Route Selection Direct Inward Dialing Off-Premises Stations Remote Access

Tandem Trunking Tie Trunks Trunk Groups Virtual Facilities

S O

O O

S S

2-5

FEATURES AND SERVICES

Data Features

Data Features (Table 2-D) support the switched data services of the system. Data services provide switched connections between analog and digital data endpoints.

Table 2-D.

FEATURE NAME

Command Mode Communications Access Manager Data Call Setup

Data Terminal Dialing Expert Mode Modem Pooling

AT&T STARLAN NETWORK Access Third-Party Call Setup Transfer to Data User Changeable Options

Data Features

MULTILINE TERMINAL

BUTTON LABEL

[DATA]

FEATURE

TYPE

S O S

S S O

O S S S

2-6

FEATURES AND SERVICES

Attendant Features

Attendant Features (Table 2-E) are available to the attendant using the Direct Trunk Attendant Console (DTAC) or the Switched Loop Attendant Console (SLAC) and the optional Direct Extension Selector Console. In addition, most muitiline voice terminal station features are available to the attendant.

Table 2-E. Attendant Features

FEATURE NAME CONSOLE BUTTON

LABEL

Attendant Call Extending Attendant Camp-On Attendant Cancel

Attendant Console, Direct Trunk Attendant Console, Switched Loop Attendant Direct Extension Selection

Attendant Forced Release (SLAC only) [FORCED RELEASE] Attendant Join (SLAC only) Attendant Message Waiting (DTAC)

Attendant Message Waiting (SLAC)

Attendant Position Busy Attendant Release

Attendant Return-Coverage-on-Busy Attendant Return-Coverage-on-Don’t-Answer Attendant Source/Destination (SLAC only) [SOURCE], [DEST]

Attendant Splitting One-Way Automatic Attendant System Alarm Indication Message Center-Like Operation (SLAC only) Night Service

[START]

[CANCEL]

[JOIN] [ATT MSG]

[ATTENDANT MESSAGE WAITING] [POS BUSY] [RELEASE]

[RTN-BUSY]* [RTN-DA]*

[ALARM]

[NIGHT]

FEATURE

TYPE

S S S

O O O

S S S

S S S S

* This button is assigned on the DTAC only,

2-7

FEATURES AND SERVICES

Account Code Entry, Forced

Description

This feature forces selected station users to enter account codes before dialing certain calls

out of System 25. required to enter account codes either for all outgoing calls or for just “dial 0 or 1” toll calls. The code entries appear in the ACCOUNT field of the SMDR records.

To make a FACE-restricted call, the user must dial the Account Code Entry access code *0

followed by an account code before dialing the rest of the call. The account code entry is

terminated when the number of digits entered equals the number administered for system

account codes or when # is entered. The user hears second dial tone after the code is entered and can then dial the necessary access codes and other numbers to reach the destination.

If the user makes an error while entering the account code, the procedure can be corrected by dialing *0 followed by the correct account code.

Users at stations that have Forced Account Code Entry (FACE) are

The user receives reorder tone when an account code is required on a call but not entered.

Considerations

FACE ensures that specified outgoing calls include information (project, client, department, etc.) to be used for accounting and billing purposes.

The voice terminal user cannot use the Account Code Entry feature button for forced entry. This button is used with the Optional Account Code Entry feature only.

An account code entry cannot be forced for the following types of calls:

● Personal Line calls

● Direct Facility Access calls

● Remote Access

● Calls to 911 and the three ARS-administered emergency numbers, when using ARS.

FACE requirements apply to calls using these facilities and features:

● Repertory Dialing

● Personal/System Speed Dialing

● ARS (nonemergency) and pooled facility access codes

● Trunk calls using Conference or Transfer.

2-8

Account Code Entry, Forced

The system does not check the validity of account codes. It checks only for the proper number of digits or the code terminator #.

Calls that do not require FACE can still be assigned an account code, as in previous releases of System 25. manual for the procedures.

Interactions

The following features interact with Forced Account Code Entry.

Bridging of System Access Buttons: Calls made from Bridged Access (BA) buttons on a

bridging station follow the FACE restrictions of the bridging station, not of the associated principal station.

Call Accountability: The account code entry may be made before or after the Call

Accountability entry. Dial tone is returned to the user after either entry.

Refer to the “Account Code Entry, Optional” feature description in this

Callback Queuing: An account code entered before queuing is saved for SMDR. Conference: Calls can be conference in both directions between a FACE-restricted station

and a non-FACE station.

Display: When a user activates the Forced Account Code Entry feature by dialing *0, the

system displays the prompt ACCT?. displayed to the right of the prompt. automatically scrolls to Screen 2; the continuation character “-” and the remaining digits

appear on Screen 2. The prompt and digits remain displayed until one of the following occurs:

— The user enters either “#” or the administered number of code digits. — The user restarts the Account Code Entry feature by dialing *0 to correct an

erroneous entry. — The system time-out for Account Code Entry is reached. — The user selects another button that overwrites the display.

Forwarding: Stations with FACE administered for all calls cannot forward calls to any outside numbers, Stations with FACE administered for “dial 0 or 1” calls can forward calls to any outside number except for “dial 0 or 1” numbers.

As the user enters the account code, the digits are

If the number of digits exceeds 9, the system

Intercept Treatment with Reorder Tone:

code is required on a call but is not entered.

Last Number Dialed: The access code *0 and the account code are not stored by this feature.

The user receives reorder tone when an account

2-9

EATURES AND SERVICES

Remote Access: Remote access callers cannot enter account codes.

Third-Party Call Setup: If the source station is FACE-restricted, the third-party data terminal

must prefix the outside destination number with *0 and an account code. Transfer: Calls can be transferred in both directions between a FACE-restricted station and

a non-FACE station.

Administration Requirements

Account code entry is administered on a per-station basis— Calls, or Forced for Dial 0 or 1 Toll Calls Only; default = Optional.

FACE cannot be administered for data ports.

Optional, Forced for all Outgoing

2-10

Account Code Entry, Optional

Description

Optional Account Code Entry allows voice terminal users to associate an account code with incoming and outgoing calls. The account code is appended to the SMDR call record and can be used later for accounting or billing purposes.

For an incoming call, the user must enter the account code at the end of the call. For an outgoing call, the user has a choice of entering the code at the beginning of the call, before the destination is dialed, or at the end of the call. An account code entry is terminated when the number of digits entered equals the number administered for system account codes, when # is entered, or when the user hangs up. The procedures for associating an account code with a call are as follows:

● Single-Line Voice Terminal User

Get dial tone (by going off-hook at the beginning of a call or by flashing the switchhook before hanging up) and dial *0; then dial the account code directly or dial a System or Personal Speed Dialing Number that contains the account code. If the code is dialed incorrectly (before the last digit), redial *0 and the correct number.

● Multiline Voice Terminal User

At the beginning of an outgoing call, get dial tone and dial *0; then dial the account code directly or dial a System or Personal Speed Dialing Number that contains the account code. If the code is dialed incorrectly (before the last digit), redial *0 and the correct number. At the end of a call, press ACCT ENTRY and enter the code before hanging up. A Repertory Dialing (REP DIAL) button can also be used to enter an account code. If the code is dialed incorrectly (before the last digit), press ACCT

ENTRY again and dial the correct number.

When the correct number of account code digits has been entered (or # is entered to signal end-of-dialing), confirmation tone is returned to the user, and the account code is appended to the SMDR call record.

Considerations

Optional Account Code Entry provides an easy method of allocating the costs of specific calls (and associated staff time) to the correct project, department or user. The account

code is appended to the SMDR call record and sent to the SMDR output channel. Account Codes can contain up to 15 digits. The system does not check the validity of account codes. It only checks for the proper

number of digits or the code terminator #.

If the user is active on a call, invoking the feature will drop the call.

2-11

FEATURES AND SERVICES

Erroneous account codes that are not corrected before the last digit is entered are recorded and cannot be changed. Partial account codes entered by going on-hook before completing the entry are recorded and cannot be changed.

If, before all digits have been entered, (1) the user goes on-hook, (2) a button other than ACCT ENTRY is pressed, or (3) 30 seconds have elapsed since the feature was invoked, the

SMDR call record will show the digits dialed up to that point.

Optional Account Code Entry cannot be invoked for a call on hold.

Interactions

The following features interact with Optional Account Code Entry. Bridging of System Access Buttons: Account codes can be entered for incoming or

outgoing calls on Bridged Access buttons using normal feature operations.

Callback Queuing: An account code entered before queuing is saved for SMDR. Conference: If more than one user attempts to enter an account code on a Conference Call,

the first to enter a code will prevail. Display: When a user activates the Account Code Entry feature by dialing *0 or pressing

ACCT ENTRY, the system displays the prompt ACCT?. As the user enters the account code, the digits are displayed to the right of the prompt.

If the number of digits exceeds 9, the system automatically scrolls to Screen 2; the continuation character “-” and the remaining digits appear on Screen 2.

The prompt and digits remain displayed until one of the following occurs:

● The user enters either “#” or the administered number of code digits.

● The user restarts the Account Code Entry feature by dialing *0 or pressing ACCT

ENTRY again, to correct an erroneous entry.

● The system time-out for Account Code Entry is reached.

● The user selects another button that overwrites the display.

Remote Access: Remote access callers cannot enter account codes.

Repertory Dialing: An account code can be stored on a REP DIAL button. Speed Dialing: An account code can be stored in a System or Personal Speed Dialing code.

Transfer: A user can transfer a call to another user, then, before hanging up, enter an

account code. Subsequent account code entries for the same call will be ignored, even

though confirmation tone has been returned.

2-12

Account Code Entry, Optional

Administration Requirements

System:

● Assign number of Account Code digits (0-15; default = 15).

Voice Terminal Port:

● Multiline terminals—Assign Account Code Entry button.

● Single-line terminals—no administration required.

Hardware Requirements

Requires an RS-232 compatible 80-column ASCII (serial) printer or other device to output Station Message Detail Recording (SMDR)/Account Code entries.

2-13

FEATURES AND SERVICES

Attendant Call Extending

Description

This feature allows the attendant to put a call in a special hold condition, call another station, then connect the two calls together.

separate the call from the console or remain connected to the other parties. Attendant Call Extending is a feature used at either a Direct Trunk Attendant Console (DTAC) or a Switched Loop Attendant Console (SLAC).

The attendant can withdraw from the connection and

Note:

The attendant, after placing or answering a call, can use Procedure 1 or 2 to extend this call to an inside extension or Procedure 1 to extend it to an outside number:

If ringing tone is heard, the attendant presses RELEASE (Manual Release) to connect the

caller to the ringing line and separate the call from the console. As an alternative, a DTAC attendant or a SLAC attendant (with Automatic Release administered) can go straight to another call by pressing any facility button, such as System Access, Loop, Automatic

Intercom, or an outside line; this completes the call extending procedure. (if a SLAC

attendant has Automatic Hold administered instead of Automatic Release, pressing a facility button simply puts the incoming call on hold and does not extend it.)

In general, the attendant should not use the TRANSFER button, which invokes the standard multiline voice terminal Transfer feature, to extend calls. If Transfer is used, busy or unanswered calls cannot return to the attendant console for further handling.

Press START to place the incoming call on hold via the Attendant Splitting One-Way Automatic feature. After receiving Dial Tone, the attendant then dials the requested inside or outside number.

Press the Selector Console Group Select and Direct Extension Selection (DXS)

buttons associated with the requested inside station. This operation is equivalent to

pressing START and dialing the extension.

The attendant has the option of staying connected to the ringing line to announce the call before connecting the two parties. other parties in a 3-way connection by using the Attendant Join feature.

If busy tone is heard and Attendant Camp-On (see associated feature description) is not

desired, the attendant presses CANCEL and is reconnected to the calling party.

If busy tone is heard on a call to an inside station and Attendant Camp-On is desired, the attendant presses RELEASE. The called party hears a tone burst, and the call waits at the called voice terminal. When a busy single-line station goes on-hook, or a busy multiline station System Access button becomes idle, the call automatically begins ringing at the station.

2-14

The attendant can then release or (SLAC only) join the

Attendant Call Extending

Calls extended to an idle voice terminal that are not answered within a specified time return to the Attendant Console on an idle LOOP button (SLAC only) or on the Return-On-Don’t-

Answer (RTN-DA) button (DTAC only). Calls camped-on at a busy voice terminal that are not

answered within a specified time return to the Attendant Console on an idle LOOP button

(SLAC only) or on the Return-On-Busy (RTN-BUSY) button (DTAC only). If a SLAC is not

available to incoming calls (busy on another call, in Position Busy mode, etc.), a returning call remains in the console queue until the console can handle it. If the Return buttons on a DTAC are busy, an extended call remains at the called terminal until that button becomes idle.

Considerations

Attendant Call Extending allows the attendant to utilize the additional attendant related features such as Attendant Splitting One-Way, Release, Cancel, Return-On-Don’t-Answer,

Return-On-Busy, Forced Release (SLAC), Join (SLAC), and Source/Destination (SLAC). For information on related Attendant Features (Table 2-E), refer to the individual feature

descriptions.

Interactions

The following feature interacts with Attendant Call Extending. Forwarding: Calls extended by an attendant to a forwarding station will be given normal

Forwarding treatment.

Administration Requirements

System:

● Number of seconds before a Camped-On call returns to the Attendant Console (1-

120 or 0 for no Attendant Camp-On; default = 30).

● Number of rings before unanswered call returns to the Attendant Console (1-31;

default = 5).

2-15

FEATURES AND SERVICES

Attendant Camp-On

Description

This feature allows the attendant to extend a trunk call to a busy voice terminal and leave it

waiting or “camped on” there. After hearing busy tone, the attendant presses RELEASE to

camp-on this call at the busy terminal.

handset of the called terminal and the caller is placed on hold (hearing music-on-hold if

available). When a System Access button at a multiline set becomes idle or a single-line

terminal hangs up, the camped-on call is connected automatically and ringing begins.

Considerations

A camped-on call can be answered by a busy single-line user without losing the current call

by momentarily pressing the switchhook (which places the current call on hold) and then

dialing *9. Multiline terminal users cannot do this. However, if they have a System Access-

Originate Only button, they can place all other calls on hold, go off-hook on that button and

dial *9 to pick up the camped-on call.

When this is done, a burst of tone is heard in the

If the camped-on call is not answered within a specified time, the call will be returned to the

Attendant Console in one of the following ways:

● Switched Loop Attendant Console

The call returns to the common queue, where it remains until the console can receive

it at a LOOP button.

● Direct Trunk Attendant Console

The call returns to the Return-On-Busy (RTN-BUSY) button. If that button is busy, the call remains camped-on at the called terminal until the RTN-BUSY button of the console becomes idle.

For information on related Attendant Features (Table 2-E), refer to the individual feature

descriptions.

Interactions

The following features interact with Attendant Camp-On.

Call Waiting: Trunk calls camped onto a station by an attendant are given priority over other

waiting calls.

Callback Queuing: Trunk calls camped onto a station by an attendant are given priority over

queued calls.

Coverage: If the called party is a sender in a Coverage group and all receivers of the

Coverage group are busy, the call will camp onto the originally-dialed station. Once

camped-on, calls will no longer receive coverage even if a coverage receiver becomes idle.

2-16

Attendant Camp-On

Direct Group Calling: The attendant can camp-on more than one call per DGC group. Voice terminals in the group do not receive a burst of tone when a call is camped on. Trunk calls camped onto a busy DGC group go into the DGC queue and are eligible for delay announcement and music-on-hold.

Direct Inward Dialing (DID): DID calls can be covered by the attendant and then given

Camp-On treatment. They do not automatically receive Call Waiting.

Station Hunting: If the called party is a member of a hunt group and all members of the

group are busy, the call camps onto the originally-dialed station. Once camped-on, calls will no longer hunt even if another member of the hunt group becomes idle.

Administration Requirements

System:

● Number of seconds before a camped-on call returns to the Attendant Console (1-120

or 0 for no Attendant Camp-On; default = 30).

2-17

FEATURES AND SERVICES

Attendant Cancel

Description

This feature allows the attendant to terminate an attempt to extend any incoming call if the

called station does not answer, or if the station answers but declines to accept the call. The attendant presses CANCEL and is automatically reconnected to the calling party. The call can then be ended by hanging up or by pressing RELEASE.

Pressing CANCEL when the Start facility is not active will be ignored.

Considerations

Attendant Cancel allows the attendant to terminate a call transfer

incoming held party via a one-button operation. This enhances

handle calls quickly and efficiently.

attempt and return to the

the attendant’s ability to

2-18

Attendant Console, Direct Trunk

Attendant

Console, Direct Trunk

Description

In System 25

directed to specific user stations, to answer calls from inside users, to extend calls to inside

stations and outside numbers, and to assist system users in placing outgoing calls and setting up conferences. The attendant can also manage and monitor some areas of system operation. System 25 supports either the Direct Trunk Attendant Console (DTAC) or the Switched Loop Attendant Console (SLAC), which is covered in the next feature description in

this manual. Consoles of both types cannot be installed in the same system. The DTAC (Figure 2-1) can be one of the Merlin Communications System multiline voice

terminals listed below, administered with special features, buttons, and capabilities to serve as an attendant position.

● 7305H02D (34 programmable feature buttons each with I-use and status LEDs)

● 7305H03B (34 programmable feature buttons; built-in speakerphone)

● 7316H01A (34 programmable feature buttons each with I-use and status LEDs; built-

in speakerphone)

In addition to the attendant features, most standard multiline terminal features are also available. (Refer to the Hardware Description section of this manual for a complete identification of the external controls, indicators, and components of the DTAC voice terminal.)

the Attendant Console is used to answer incoming trunk calls that are not

DIRECT TRUNK ATTENDANT OPTIONAL SELECTOR

Figure 2-1.

CONSOLE

Typical Direct Trunk Attendant Console Position

CONSOLE

The DTAC is always equipped with the following feature buttons that provide unique

attendant console functions.

Each button has a green status LED that indicates when the

feature is activated.

2-19

FEATURES AND SERVICES

● Start [START]: Initiates the call extending process by placing a caller on hold and

providing internal dial tone to the attendant

● Cancel [CANCEL]: Terminates the

“Start” operation and reconnects the attendant

to the calling party.

● Release [RELEASE]: Releases the attendant from an active call and completes the

call extending process.

● Return-On-Busy [RTN-BUSY]: Camped-on calls are returned to the console on this

button if not answered within a specified interval.

● Return-On-Don’t-Answer [RTN-DA]:

Extended calls not answered are returned to

the console on this button if not answered within a specified interval.

● Attendant Message Waiting [ATT MSG]: Used by the attendant to remotely control

Message LEDs on voice terminals.

● Alarm [ALARM]: The associated status LED flashes when a system trouble has

been detected; the LED can be changed from flashing to steadily lit by pressing the button.

Two other attendant-only features are assigned to console feature buttons if required,

Position Busy [POS BUSY] and Night Service [NIGHT]. In a dual attendant console system, Position Busy removes an Attendant Console from service. in the “Position Busy” mode at a time.

When Night Service is activated, attendant-seeking

Only one of two consoles can be

calls can ring a night bell, can be directed to assigned voice terminals, or can be sent to a night service announcement.

Dual Console Operation

A System 25 can be equipped with up to two DTACs that operate simultaneously when both

are in service.

If the system has two attendant consoles, one is called the first attendant console; the other is called the second attendant console. The calls in the following list will be routed to the first attendant console.

● Dial “0” calls

● DID calls to unassigned numbers (when administered to route to the attendant)

● Calls to Floating Personal Dial Codes (FPDCs) not signed in anywhere (if

administered to route to the attendant)

If the first attendant has activated the Position Busy feature or is busy on all System Access buttons, these calls will be routed to the second console. If that console is also busy on all System Access buttons, busy tone is provided to the calling party.

System users and DID callers can reach a particular attendant by dialing the Personal Dial Code (PDC) assigned to the desired attendant.

2-20

Attendant Console, Direct Trunk

Position Busy

A POS BUSY button can be assigned to each console; this permits selection of one of two

modes of operation: (1) simultaneous operation or (2) only one Attendant Console active.

(Note that only one console is allowed to be inactive at any given time.) An associated POS

BUSY status LED is lighted when the console is inactive.

terminations on the rightmost two columns of buttons of the inactive console. Ringing

disabled on an inactive console will be enabled on the active console for those trunks with

dual appearances (appearances on both consoles).

including those on the associated Attendant Direct Extension Selector Console will continue

to function normally even though the console is inactive.

Ringing is disabled on all trunk

All other features on all buttons,

Considerations

Direct trunk operation means that trunks are terminated on individual buttons, called Personal Line buttons, where outside calls are answered and originated. The console can

have several incoming calls ringing simultaneously. Each console can also have an optional Attendant Direct Extension Selector Console to

enhance internal calling. The Selector Console is covered in the “Attendant Direct Extension Selection” feature description.

For information on related Attendant Features (Table 2-E), refer to the individual feature

descriptions.

Interactions

The following features interact with Direct Trunk Attendant Console.

Attendant Console, Switched Loop:

Switched Loop Attendant Console.

Bridging of System Access Buttons: Callback Queuing: The attendant can queue calls that are extended using the normal

START-RELEASE button operation. However, calls originated using only the START button (no other call put on hold) cannot be queued.

Call Waiting: Calls cannot wait at a DTAC. Display: The DTAC does not support Display.

A DTAC cannot operate in the same system with a

A DTAC cannot serve as a principal station.

2-21

FEATURES AND SERVICES

Administration Requirements

System:

● Display attendant position number {first or second).

● Assign number of rings before unanswered calls return to the Attendant Position (1-

31; default = 5).

● Force DID calls to unassigned numbers to ring at the Attendant Position (yes or no;

default = yes).

● Force calls to FPDCs that are not signed in anywhere to ring at the Attendant

Position (yes or no; default = yes).

● Assign number of seconds before an unanswered Camped-On Call returns to the

Attendant Console (1-120 or 0 for no Attendant Camp-On; default = 30).

Attendant Console (Voice Terminal) Port:

● Assign voice terminal type (309).

● Assign buttons for Night Service and Position Busy, if required. Attendant Message

Waiting is defaulted to button 14, but can be assigned to any programmable button.

● The following buttons are predefine on the Attendant Console and are not

administrable: ALARM, RTN-DA, RTN-BUSY, START, CANCEL, and RELEASE.

● Trunk terminations; the following is required for each trunk terminated on the console

(administered as Personal Line appearances; DID trunks cannot be terminated on a DTAC):

— Trunk Number —

Make this the Principal Station (owner) of the trunk (yes or no).

—

Enable Ring (yes or no).

Hardware Requirements

Each console requires a port on a ZTN79 ATL Line circuit pack. Figure 2-2 provides a connection diagram for the DTAC.

2-22

SYSTEM 25

CABINET

ZTN79

HYBRID

LINE CP

PART OF

OCTOPUS CABLE

PART OF SIP

SIP

ADAPT.

Attendant Console, Direct Trunk

DIRECT TRUNK

ATTENDANT

CONSOLE T1

LEGEND:

— TYPICAL-103A CONNECTING BLOCK* — MODULAR CORD (D8W-87) - FURNISHED WITH SET

C1 C2

— OCTOPUS CABLE (WP90780) - PEC 2720-05P — 34-BUTTON VOICE TERMINAL: 7305H02D - PEC 3162-417,

7305H03B - PEC 3162-BIS, OR 7316H01A - PEC 3167-34B

— 4-PAIR INSIDE WIRING CABLE*

— FURNISHED BY INSTALLER

RANGE: WITHIN 2000 FEET OF SYSTEM CABINET (LOCAL POWER REQUIRED >1000 FEET)

Figure 2-2. Direct Trunk Attendant Console Connections

2-23

FEATURES AND SERVICES

Attendant Console, Switched Loop

Description

In System 25, the Attendant Console is used to answer incoming trunk calls that are specified to ring at an attendant position, to answer calls from inside users, to extend calls to inside stations and outside numbers, to assist system users in placing outgoing calls, and to set up conferences. operation. System 25 supports the Switched Loop Attendant Console (SLAC) or the Direct Trunk Attendant Console (DTAC), which is covered in the preceding feature description of this manual. Consoles of both types cannot be installed in the same system.

The SLAC (Figure 2-3) can be one of the Merlin System multiline voice terminals listed below, administered with special buttons, features, console. In addition to the attendant features, most standard multiline terminal features are also available. (Refer to the “Hardware Description” identification of all the external controls, indicators, and components of the SLAC voice terminals.)

The attendant can also manage and monitor some areas of system

and capabilities to serve as an attendant

section of this manual for a complete

● 7305H04C (34 programmable feature buttons; built-in speakerphone and display)

● 7317H01A (BIS-34D—34 programmable feature buttons each with I-use and status

LEDs; built-in speakerphone and display)

SWITCHED LOOP

ATTENDANT CONSOLE

Figure 2-3.

Typical Switched Loop Attendant Console Position

OPTIONAL SELECTOR

CONSOLE

Associated with the SLAC are message center-like capability and display support. The message center feature provides for efficient handling of calls that should be sent to message takers. These calls are directed to a message center console position through administration of call type translations. assigned to extension numbers and information to the attendant when calls

Display service allows identifiers (names) to be

trunks.

The system then displays the appropriate

are processed at the console.

2-24

Attendant Console, Switched Loop

The Switched Loop Console derives its name from the ability of the system to hold incoming attendant-bound calls in a queue and switch them on voice loops to an available console. Calls are directed to a console in a preadministered, prioritized sequence. The SLAC differs from the DTAC in the following basic respects:

● It receives calls one at a time, regardless of the number of incoming calls to the

system (at the DTAC, many incoming calls can be ringing simultaneously).

● It displays pertinent information about incoming and outgoing calls.

● It can serve as an attendant console, a message center, or a combination of both.

● It has speakerphone and Hands-Free Answer on Intercom (HFAI) capabilities.

Fixed Buttons (Figure 2-4)

The SLAC has five fixed line appearance, or answered.

Each button has a red I-use LED and a green status LED. These buttons

“LOOP,” buttons where all incoming calls are

represent voice links (loops) between the console and the switch. The loops also provide the paths for outgoing calls.

In addition to the LOOP buttons and standard multiline terminal buttons (HOLD, TRANSFER, etc.), the console is equipped with the following feature buttons that provide unique attendant functions. On the deluxe SLAC, all of these buttons have both I-use and status LEDs; on the

basic SLAC, only the buttons specifically noted have LEDs.

● Start [START]: Initiates the call extending process by placing a caller on hold (on the

Source button) and providing internal dial tone to the attendant.

● Cancel [CANCEL]: Terminates the “Start” operation and reconnects the attendant to

the calling party (on the Source button).

● Release [RELEASE]: Releases the attendant from an active call and completes the

call extending process.

● Source [SOURCE]: Reconnects the attendant to the calling party after a call has

been initiated to the called party but before the two parties have been connected

together. (i-use and status LEDs on basic SLAC.)

● Destination [DEST]: Connects the attendant to the called party again after the

attendant has operated the Source button to speak to the calling party. (I-use and status LEDs on basic SLAC.)

● Join [JOIN]: Joins together (in a 3-way connection) the attendant and the other

parties in an extended call.

● Forced Release [FORCED RELEASE]: Drops all active parties from a call.

● Last Number Dialed [LAST # DIALED]: Redials the last number dialed.

2-25

FEATURES AND SERVICES

●

Position Busy [POS BUSY]: Temporarily removes the attendant position from service. (I-use and status LEDs on basic SLAC.)

●

Attendant Message Waiting [ATTENDANT MESSAGE WAITING]: Used by the attendant to remotely control Message LEDs on voice terminals. (Status LED only on basic SLAC.)

●

Alarm [ALARM]: The associated status LED flashes when a system trouble has been detected; the LED can be changed from flashing to steadily lit by pressing the button. (I-use and status LEDs on basic SLAC.)

●

Inspect [INSPECT]: Puts the display into a mode for inspecting the status or stored

information of certain buttons. (Status LED only on basic SLAC.)

●

Scroll [SCROLL]: Causes display to present additional call information, when available.

●

Local [LOCAL]: Allows display to be used for clock and calendar functions.

The buttons not assigned to normal voice terminal functions or to attendant functions are defaulted to the Flex DSS feature. One of these programmable buttons can be assigned to Night Service, if the feature is required, and any of the others to multiline voice terminal features.

Programmable Feature Buttons (Figure 2-4)

The features in the following list can be assigned to the programmable feature buttons. On the deluxe SLAC, each of the programmable buttons is equipped with an I-use LED and a status LED. On the basic SLAC the buttons do not have LEDs.

Account Code Entry Agent Status for CMS Auto Answer Auto Intercom Call Direct Facility Access

Exclusion Flex DSS Leave Word Calling Manual Signaling Next

Repertory Dialing Direct Station Selection (DSS) Station-to-Station Message Waiting Directory

Transfer to Data

Flex DSS and Repertory Dialing can be programmed with dialable numbers by the attendant.

When a call is placed using a Flex DSS button or a Repertory Dial button, one of the five

switched loops is automatically selected for routing the call to the switch.

2-26

Attendant Console, Switched Loop

Display (Figure 2-4)

The SLAC contains an alphanumeric call information display. This module is built into the top of the console. controls, and a thumbwheel Contrast adjustment. Timer functions are available only when the attendant presses the Local button. The Time/Timer Exit button allows the user to select ordinary clock/calendar display or a timer. set the clock. In Timer mode, Start and Stop are used to time events.

The primary purpose of the console display is to provide the attendant with descriptive information about incoming and outgoing calls. This information includes extension numbers and associated names, trunk identifiers, reasons for call return and redirection, and number of calls waiting in the queue for service. detailed discussion of call information displays.

The console display also provides access to the system’s integrated directory and allows the attendant to search for the extension numbers assigned to users. Refer to the “Directory” description for information on this feature.

It contains a 16-character 5x7 dot matrix liquid crystal display, timer

In the Time mode, Set, Fwd, and Rev are used to

Refer to the “Display” feature description for a

Switched Loop Operation

All calls that are intended for an attendant position are first routed by the system to a common queue where they wait to be sent to a console. In a configuration having two consoles, the same queue serves both consoles. available to receive a call, the system removes a call from the queue and directs it to an idle loop on the console. Calls are selected from the queue on the basis of “first in/first out” and in accordance with administered priorities. An available attendant console is one that is not active on a call, has no calls ringing, has at least one LOOP button idle, is not in Position Busy or Inspect mode, and is not in a split condition.

In a two-console arrangement, each console can be administered to receive all types of calls or to receive only specific types. A call that can be received by either position goes to the first available attendant; when both are available, the call goes to the attendant who has been idle the longest time. If one console is in “Position Busy” mode, all calls (except Attendant PDC, Attendant PDC via DID, and DGC calls) direct to the other console.

An incoming call from the queue to a console appears on one of the five LOOP buttons; the attendant is alerted to the call by audible ringing, a steadily lighted red lamp, and a flashing green lamp. While the call is ringing and while the attendant is handling the call, the system will direct no more calls to the console. After the attendant ends or releases the call or puts it on hold, another call can come in on an idle button.

It should be emphasized that even when all LOOP buttons on a console are idle, only one call can be directed from the queue to the console. LOOP button is no longer available, but a new call can come in on another button that is idle.

When an attendant console becomes

If the attendant puts a call on hold, that

Answering a Call on a LOOP Button

At an available SLAC, an incoming call will ring at an idle LOOP button automatically selected by the system. button is not necessary.

The attendant has only to lift the handset to answer the call; pressing the

2-27

FEATURES AND SERVICES

Placing a Call on a LOOP Button

In general, originating a call at an idle SLAC involves going off-hook and then dialing the

desired number. If the console is not idle, the attendant can generally use one of these

procedures:

● Split the active call (that is, put it on temporary hold by pressing the Start button) and

place another call on the same button; this is the normal call-extending procedure.

● If the Automatic Hold feature is enabled, press another LOOP button to place a new

call; the first call goes on hold.

● If the console does not have Automatic Hold (that is, it has the default Automatic

Release), use the Hold button to put the active call on hold; then select a new loop to place a new call.

Dual Console Operation

A System 25 can be equipped with up to two SLACs, which operate simultaneously when

both are in service. Both consoles can receive the same types of calls, or each can be administered to receive only certain types. When one console is out of service (see Position Busy below), most calls are directed to the other.

Either or both consoles can function as a

message center.

Inside users can reach either attendant by dialing 0, or a particular one by dialing the attendant’s PDC. DID callers can use the Attendant’s private DID number or the common queue.

Position Busy

Operation of the Position Busy button by the attendant makes the console unavailable to

most incoming calls from the common queue and directs the calls to another answering station. The only types of calls that are not diverted by Position Busy are Attendant DID,

DGC, and PDC calls. The placing of outgoing calls is not affected. When the Position Busy condition is active, the green status lamp of the button lights steadily. Position Busy is

similar to the Send All Calls feature, which is not administrable on the SLAC. The Position Busy feature is automatically assigned to a button position (see Figure 2-4)

when the console is administered. In a one-console configuration, however, the feature is enabled only if a multiline voice terminal in the system is administered as a receiver of calls from the common queue while the console is unavailable. If this is not done, the button should be reassigned to another of the permissible features.

In a two-console configuration, an attendant in Position Busy mode will be covered by the other attendant. Only one console can be in Position Busy mode at a time.

2-28

Attendant Console, Switched Loop

Call Types

The following types of attendant-seeking calls are sent to the common queue and then directed to an idle LOOP button at a console:

Incoming trunk calls that are administered to ring in the queue. Dial Operator calls (placed from inside stations by dialing 0) Following calls signed in at the console Calls to Floating PDCs (FPDCs) that are not signed in at a specific station Direct Inward Dialing (DID) calls to numbers that are not assigned to specific stations

Attendant DID calls

Calls to the attendant’s PDC

Coverage calls for which the common queue is a covering receiver

Returning calls.

An incoming trunk connected directly to a DGC group can also be assigned to the Attendant Queue. Calls ringing simultaneously at the DGC group and at the console will be connected to the facility that answers first.

The order in which calls are serviced is established by system administration. Each type of call is assigned a priority that determines its position in the common queue with respect to other types. one-attendant system, all calls automatically go to that attendant. If a system has two attendants, however, administration can direct calls of each type (with the exceptions noted below) to either position or to both positions. console or to the specific console that originated them.

Following and Attendant PDC calls can be assigned priorities but cannot be directed to a specific attendant in a two-position system. (DID and Dial-in Tie Trunks) can be assigned a priority and be directed to a specific attendant position or to both.

Calls accessed by dialing a code [Pickup at other extensions, Trunk-Answer-from-AnyStation (TAAS) Night Service calls, and calls parked by other stations] are originated at a LOOP button and brought to the console on that same button. These calls do not enter the common queue.

System administration also establishes where the calls go. Obviously, in a

Returning calls can be directed to either

Any trunk except types 901-902 and 1003-1008

2-29

FEATURES AND SERVICES

RED I-USE -

GREEN STATUS

Timer

Start

Set

Loop

● Loop

●

● Loop

●

● Loop

●

● Loop

●

Conference

Drop

Stop

Fwd

1 2 3

Rev

❑❑❑

4 5 6

❑❑❑

7 8 9

❑❑❑

* 0 #

❑❑❑

Time/

Timer

Exit Contrast

●

Alarm

●

● Pos

● Busy

● Flex DSS

●

Source

●

Dest

●

Transfer

Hold

-----------------

●

Inspect

●

Local

●

Flex DSS

●

Flex DSS

●

● Flex DSS

●

Flex DSS

●

Flex DSS

●

Flex DSS

Cancel

Start

●

Scroll

●

Forced

● Release

● Last #

● Dialed

●

Flex DSS

●

Flex DSS

●

Flex DSS

●

Flex DSS

●

Flex DSS

Attendan

● Message

● Waiting

Join

Release

Figure 2-4.

Buttons and Display of BIS-34D

Ringing

The SLAC receives normal ringing on incoming calls. Abbreviated alerting (one short burst of ringing), accompanied by a change in the LOOP button wink rate, indicates to the attendant that a held call has exceeded the preset hold time interval. Calls on hold can be administered to continue on hold after the second timeout or to return to console queue. Abbreviated alerting can also be administered as a reminder for new calls entering the queue.

2-30

Attendant Console, Switched Loop

Considerations

One System 25 configuration can support either one or two SLACs or one or two DTACs, but not a combination of a SLAC and a DTAC.

The optional Direct Extension Selector Console can be connected to a SLAC to provide busy/idle status of inside stations and quick calling of their extension numbers. In a system with two consoles, either or both can have a Selector Console as an adjunct. The Selector Console is covered in the “Attendant Direct Extension Selector Console” feature description.

For information on related Attendant Features (Table 2-E), refer to the individual feature descriptions.

Interactions

The following features interact with Switched Loop Attendant Console. Attendant Console, Direct Trunk: The SLAC cannot operate in the same system with a

Direct Trunk Attendant Console.

Bridging of System Access Buttons:

station.

Callback Queuing: The attendant can queue calls that are extended using the normal

START-RELEASE button operation. However, calls originated using only the START button

(no other call put on hold) cannot be queued.

Call Originations:

currently active call. At a console that has the default Automatic Release feature, the active call is dropped when the attendant presses a new LOOP button. The new loop becomes the active one; dial tone is provided, and the attendant can dial a number. If the optional Automatic Hold feature is administered, the interrupted call is put on hold instead of being

lost.

If a new call is originated with the START button or at the Selector Console, the active call is split. The current loop becomes the active loop for the new call. The display shows the split call information. This is the normal operating procedure for extending calls.

When a REP DIAL button is pressed while the console is active on a call, the active party is not dropped or split, and the display does not change. If the active call is with an inside station, the digits generated by the REP DIAL button are ignored. But if the active call is on an outside trunk, then pressing REP DIAL will cause the digits stored on the button to be sent out over the trunk (“thru-dialing” or “end-to-end signaling”).

Placing a new call from an active console causes interactions with the

The SLAC cannot serve as a principal or a bridging

When an active call is put on hold manually by operation of the HOLD button, the system does not automatically select a new loop for placing a call. In this case, the attendant can select a new loop by pressing an idle LOOP button, then dial a number. Pressing a DSS, Flex DSS, Auto Intercom, Last Number Dialed, REP DIAL, or Selector Console button will select a new loop and dial a number in a single operation.

2-31

FEATURES AND SERVICES

Call Waiting: Calls cannot wait at the SLAC. Callback Queuing: Calls that are originated without use of the START button can be queued

for busy facilities.

They are treated like calls from standard multiline stations. A queued call remains on the LOOP button where it was originated and does not return via the common queue.

Headset Adapter: Connection of a headset adapter to the SLAC allows the optional use of a

headset instead of the handset in handling calls.

Administration Requirements

Attendant Console (Voice Terminal) Port:

● Assign voice terminal type.

● Assign Prime Line Preference to one of the LOOP buttons; default = top LOOP

button.

● Assign flexible buttons.

Trunk Port:

● Assign priorities to calls directed to the console queue.

● Assign the attendant(s) to handle calls from this trunk.

● Assign unique trunk identifiers.

System:

● Assign DID number for attendant “0” treatment.

● Assign Coverage Group number for which the console queue is to serve as a

receiver.

● Assign Automatic Hold or Automatic Release.

● Enable ring reminder when calls enter queue.

● Assign Hold timer interval.

● Assign destination of held calls that time out.

● Assign call types and attendant specification for Message Center-Like operation in a

two-console configuration, if applicable.

● Assign call type priorities and attendant specification.

● Assign Position Busy “backup” station, if applicable.

2-32

Attendant Console, Switched Loop

Hardware Requirements

Each console requires a port on a ZTN79 ATL Station circuit pack. Figure 2-5 provides a connection diagram for the SLAC.

SYSTEM 25

CABINET

ZTN79

HYBRID

LINE CP

PART OF

OCTOPUS CABLE

PART OF SIP

SIP

ADAPT.

SWITCHED LOOP

ATTENDANT

CONSOLE T1

LEGEND:

– TYPICAL-103A CONNECTING BLOCK*

– MODULAR CORD (D8W-87) - FURNISHED WITH SET

C1 C2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P T1

- 7305H04C BUILT-IN SPEAKERPHONE (BIS) WITH DISPLAY VOICE TERMINAL - PEC 3162-DIS OR 7317H01A DELUXE BIS WITH DISPLAY VOICE TERMINAL – PEC 3167-DSB

W1 – 4-PAIR INSIDE WIRING CABLE*

–FURNISHED BY INSTALLER

RANGE: WITHIN 2000 FEET OF SYSTEM CABINET

Figure 2-5.

Switched Loop

(LOCAL POWER REQUIRED >1000 FEET)

Attendant Console Connections

2-33

FEATURES AND SERVICES

Attendant Direct Extension Selection

Description

This feature permits the attendant to extend calls to stations by pressing one or two buttons

instead of pressing START and dialing the extension number. system can have an associated Direct Extension Selector Console. A Selector Console can be used with either a Direct Trunk Attendant Console (DTAC) or with a Switched Loop Attendant Console (SLAC).

The Selector Console is also used by the attendant for simply calling inside stations, in addition to “extending” calls.

The Selector Console (Figure 2-6) has an array of 100 Direct Extension Selection (DXS) buttons plus seven Group Select buttons and a Test button. The DXS buttons are labeled 00 through 99. Default assignments for the Group Select buttons are 200-299, 300-399, etc., up to 800-899, but they can be assigned any hundreds group in the dialing plan. To select an actual extension number, the user presses a Group Select button for the hundreds group and a DXS button for the last two digits.

Each attendant console in a

Pressing a DXS button when off-hook on an incoming call is equivalent to pressing START and dialing a station.

Such action will busy out the Start facility until the call is released. The

Selector Console can be used to monitor the on-hook/off-hook status of stations in the

system. If the attendant, while on-hook, presses a Group Select button, the Group Select

LED and the LEDs of any busy stations in that group will light steadily. The DXS button LED and the Group Select button LED associated with a particular station

will flash when one of the following events occurs:

● The station calls the attendant

● A call extended by the attendant to the station returns on a RTN-BUSY or RTN-DA

button (DTAC only) or on a LOOP button (SLAC only)

● The station is covered and a call to it is redirected to a COVER button (DTAC only) or

to a LOOP button (SLAC only).

The LEDs stop flashing when the call is answered.

When the attendant answers a returning call, the LEDs will return to the state that reflects the current on-hook/off-hook status of the station.

In all of the above cases, the Group Select lamp associated with the current

“hundreds page” remains lighted steadily.

An outside call can be parked via the Selector Console by pressing one of the eight DXS

buttons that can be designated as Park extension numbers. On the DTAC, the status LED of

the parked call winks (to indicate that the call is on hold) and the status LED on the Selector

Console lights steadily. On the SLAC, the call is removed from the attendant console, with

the Selector Console LED lit steadily. A call parked via the Selector Console and not picked up within an administered period (0-

240 seconds; default = 120) will return to the console.

The status LED of the parked-on

button will flash while the call is ringing the attendant.

2-34

Attendant Direct Extension Selection

100 DXS

WITH LEDS

GROUP SELECT BUTTONS AND ASSOCIATED LEDS

NOTE:

STATUS LEDs are located to the left of each DXS button (00-99) under transparent front cover.

TEST BUTTON

Figure 2-6. Model 23A1 Attendant Direct Extension Selector Console

2-35

FEATURES AND SERVICES

A call parked via the Selector Console can be picked up at any voice terminal by dialing the

Park retrieval code

The rightmost button on the bottom row is a Test button. When it is pressed, all DXS LEDs will light sequentially; a second press allows individual LEDs to be tested and a third press ends the test.

(*8) and the number on which the call is parked.

Considerations

When there are two Attendant Selector Consoles in the system the Group Select button assignments are identical. other console is automatically changed.

Buttons on the Selector Console point to either station PDCs, FPDCs (FPDCs), Park codes, DGC access codes, or pooled facilities. Calls extended by the Selector Console are directed

as described in the “Personal Dial Codes” feature description.

Whenever an administrative change is made to one console, the

When a station calls the attendant, the associated LED on the Selector Console will flash while the call is ringing and will light steadily when the attendant answers the call. The LED will light steadily whenever the terminal is off-hook. for buttons pointing to FPDCs.

If a call to a PDC is directed to a COVER or LOOP button on the Attendant Console, the covered status LED of the voice terminal on the Selector Console will flash and then go dark when the call is answered by the attendant. If the covered call was intended for a FPDC that was signed in at a terminal with attendant coverage, the Selector Console status LED associated with the FPDC (if assigned) will flash. In this case, the Cover button status LED will also flash (DTAC only).

A call can arrive at an Attendant Console SYSTEM ACCESS or LOOP button because the PDC or FPDC is signed in at the Console or because the FPDC is not signed in anywhere. For these calls, the status LED on the Selector Console will not light.

If the attendant extends a call to a station or DGC group and that call returns to the attendant, the status LED of the called station or group on the Selector Console will flash and then go dark when the call is answered by the attendant. This is true regardless of the sign-in status of the PDC.

Station busy indication is not provided

Interactions

The following features interact with Attendant Direct Extension Selection. Attendant Position Busy: The Selector Console functions normally when the associated

Attendant Console is in the inactive mode. Attendant Return-Coverage-On-Busy/On-Don’t-Answer: If a call to a FPDC is returned to the

attendant on a RTN-BUSY or RTN-DA button or on a LOOP button, the status LED of the FPDC on the Selector Console will flash during ringing and go dark when answered.

2-36

Attendant Direct Extension Selection

Callback Queuing: Callbacks to the attendant do not flash at the associated Selector Console.

Coverage: If the attendant receives a coverage call for a FPDC, the associated status LED on the Selector Console will flash and then go dark when the call is answered by the attendant.

Direct Group Calling: When all stations in a DGC group are busy, the DXS status LED on

the Selector Console lights.

Pooled Facilities: If a 1- or 2-digit FAC is used, the associated status LED on the Selector

Console will light steadily whenever all trunks in this group are busy. This does not occur with 3- or 4-digit FACs.

Administration Requirements

Special Feature Ports:

● Assign a port on a ZTN79 ATL Station Circuit Pack for each Selector Console.

● Assign Group Select button hundreds groups.

System:

● Assign Selector Console Park codes.

● Park return time (0-240 seconds; default = 120).

Hardware Requirements

Requires an Attendant Selector Console, and a port interface on a ZTN79 ATL Station CP.

The Selector Console requires a KS-22911, List 1 Power Supply, associated 115V ac power outlet, and a 400 B-type Adapter. The 40062 Adapter provides power to the console at the wall jack. The Console connects to a port on the ZTN79 ATL Station CP.

Detailed connection information is provided in Figure 2-7. Descriptions of the Station Interconnect Panel (SIP), Trunk Access Equipment (TAE), and associated cables and

adapters, as shown on the figures, are provided under “Connectivity” in Section 4.

2-37

FEATURES AND SERVICES

SYSTEM 25

CABINET

ZTN79

HYBRID

LINE CP

LEGEND :

B1 – B2 – C1 – C2 – C7 – P1 – T1 – W1 –

RANGE :

PART OF

OCTOPUS CABLE

TYPICAL-103A CONNECTING BLOCK* 400B2 ADAPTER MODULAR CORD (D8W-87) OCTOPUS CABLE (WP90780) - PEC 2720-05P CORD D6AP-87 KS-22911 POWER SUPPLY 23A1 SELECTOR CONSOLE - PEC 62509 4-PAIR INSIDE WIRING CABLE*

FURNISHED BY INSTALLER

WITHIN 2000 FEET OF SYSTEM CABINET

(LOCAL POWER REQUIRED >1000 FEET)

- FURNISHED WITH CONSOLE

PART OF SIP

SIP

ADAPT.

FURNISHED WITH CONSOLE

- FURNISHED WITH CONSOLE

400B2 ATTENDANT ADAPT.

-48VDC P1

SELECTOR

CONSOLE T1

2-38

Figure 2-7.

Attendant Direct Extension Selector Console Connections

Attendant Forced Release (SLAC Only)

Description

This feature drops all active parties from a call in which the attendant and one or more other parties are connected together. RELEASE button while connected to other callers in a conference-type call. The other parties will be disconnected from the console and from each other. After Forced Release has taken place, the attendant can receive a new call from the console queue or place a call.

Considerations

Forced Release differs from Release in an important respect. Simple Release separates the attendant from an extended call or a conference call, but leaves the other parties connected together; Forced Release completely disconnects all parties.

When the attendant is connected to only one other party, Forced Release has the same result as Release (that is, the call is ended). If the attendant has already Released, Forced

Release has no additional effect.

The attendant uses the feature by pressing the FORCED

For information on related Attendant Features (Table 2-E), refer to the individual feature

descriptions.

2-39

FEATURES AND SERVICES

Attendant Join (SLAC Only)

Description

This feature allows the attendant, while extending an incoming call, to connect together the

calling party, the called party, and the console in a 3-way call. other. The attendant activates the feature by pressing the JOIN

to one of the other parties.

Considerations

The Join feature cancels a split condition.

The attendant can use the Join feature to stay on an extended call and give assistance to the other parties.

A joined call can be expanded into a conference call by adding more parties.

All parties can talk to each button while still connected

Once the JOIN button has been pressed, there is no way to “unjoin” the parties (that is, separate them back into SOURCE and DEST).

For information on related Attendant Features (Table 2-E), refer to the descriptions.

calling and called

individual feature

2-40

Attendant Message Waiting

Description

This feature allows the attendant to remotely control the status of Message LEDs on user stations. The attendant can activate the Message LED of the station while either (1) ringing, (2) receiving Busy Tone, or (3) talking to a station. The status of the Message LED of the called party is reflected by the green status LED of the Attendant Message Waiting button in

any of these cases.

To activate (light) a user’s Message LED in any of these cases, the attendant presses the Attendant Message Waiting button. (If the signaled voice terminal is not equipped with a

Message LED, the attendant’s LED will remain dark.)

Note:

If the attendant presses the button a second (or third) time before hanging up, the user’s Message LED will turn Off (and back On), etc.

The red I-Use LED associated with the Attendant Message Waiting button on the DTAC is

inoperative.

The attendant can turn a user’s Message LED on or off without disturbing the user by going off-hook on a System Access or Loop button, pressing the Attendant Message Waiting button, and then dialing the station. Confirmation tone is returned, and the user’s Message

LED will turn on. To turn it off, press the button again.

The Attendant Message Waiting button on the Direct Trunk Attendant

Console (DTAC) is labeled ATT MSG. On the Switched Loop Attendant

Console (SLAC), the name is completely spelled out.

Considerations

This feature allows the attendant to notify stations that a message is available for them. This feature is not the same as the Station-To-Station Message Waiting or the Coverage

Message Waiting features.

summary of all system Messaging Services.

Refer to the “Messaging Services” feature description for a

Interactions

The following features interact with Attendant Message Waiting. Callback Queuing: An attendant active on a queued inside call can toggle the Message LED

of the queued-for station by pressing the Attendant Message Waiting button. Conference: Pressing ATT MSG while on a conference call will be ignored.

2-41

FEATURES AND SERVICES

Coverage Calls:

The attendant can light the Message LED of the covered station when

receiving a coverage call for the station.

Hands-Free Answer On Intercom:

If the attendant lights the Message LED on a voice terminal with AUTO ANS button active, the auto-answer function will turn off, allowing subsequent calls to receive coverage as assigned.

Administration Requirements

Attendant Console (Voice Terminal) Port:

● The ATT MSG button is defaulted and fixed on SLACs; it is defaulted on DTACs but

can be assigned to any programmable button.

Hardware Requirements

Stations must have a Message indicator (not assignable).

2-42

Attendant Position Busy

Description

This feature allows an Attendant Console to be placed in an inactive mode.

Systems with Direct Trunk Attendant Console(s) (DTAC)

There must be two Attendant Consoles in the system before this feature can be activated. A

Position Busy (POS BUSY) button can be assigned on each of the consoles. Pressing POS

BUSY at one of two active consoles causes the POS BUSY status LED to light and the console to be placed in the inactive mode. Pressing POS BUSY a second time causes the LED to go dark and the console to be reactivated. Pressing POS BUSY when only one Attendant Console is active is ignored (i.e., only one console is aIlowed to be inactive at a time.)

When a console is in the inactive mode, ringing is disabled on facility appearances on the two rightmost button columns only.

normally. Calls to floating PDCs not signed in, DID calls, and dial “0” calls will be

transferred to the active console. Internal calls to the PDC of the inactive console will still be directed to that console.

The (green) status LEDs will continue to operate

Incoming calls on lines that normally ring at only the inactive console will now ring at the

active console if they have an appearance there. All buttons on the inactive console will continue to function normally, including the Selector

Console buttons. Calls can be originated by the inactive console. Call appearances in the leftmost two columns of buttons on the inactive console are not affected by the Position

Busy feature.

The attendant can press a Direct Station Selection (DSS), Automatic Intercom (AUTO ICOM), or a Direct Facility Access (FACILITY) button and then receive busy-to-idle reminder when the facility becomes idle.

Note that if a personal trunk appears on only one DTAC, incoming calls on those trunks will not receive service when the console is inactive. For this reason, it is strongly recommended that each DTAC attendant be assigned a Coverage-Individual (COVER-IND) button for the other console so that these calls can be covered. Also, be sure to make the Attendant Console the principal station (owner) on all trunks that are to receive coverage by the other attendant.

Systems with Switched Loop Attendant Console(s) (SLAC)

In order for the Position Busy feature to be operational, the system must have either two attendant positions or one position plus a multiline voice terminal administered as a “backup.” If the system has two consoles, pressing the Position Busy button on one will make it inactive and cause most calls in the common console queue to be directed to the active console. Each attendant covers for the other. Only one console can be in Position

Busy condition at a time. If the system has one console with an administered backup voice terminal, pressing the POS BUSY button will make the SLAC inactive, and most calls from the common queue will be directed to the backup terminal.

2-43

FEATURES AND SERVICES

A console in Position Busy mode can receive attendant PDC, DID, and DGC calls, and outgoing calls can still be placed. Local functions can be activated.

Considerations

Position Busy allows one of two attendant positions to be made inactive when not required. This is useful in situations where calling traffic requires only one console operator.

Interactions

The following features interact with Attendant Position Busy. Attendant Call Extending: Unanswered calls extended by an inactive console will return to

the active console on the Return-On-Don’t-Answer (RTN-DA) button (DTAC only) or on a Loop button (SLAC only).

Attendant Camp-On: Calls Camped-On by an inactive console will return to the active console when Camp-On timeout occurs.

Attendant Message Waiting:

An inactive attendant is permitted to control voice terminal

Message LEDs.

Automatic Intercom: The inactive attendant is permitted to place Automatic Intercom calls.

DTAC only: Automatic Intercom calls to the inactive attendant will not ring at the console or be transferred to the active attendant when the AUTO ICOM button is located in one of the two rightmost button columns

Coverage:

● DTAC only—

If the active attendant is a coverage receiver for the inactive attendant, coverage is invoked and calls will appear at the active attendant’s Cover button. If the inactive attendant is a coverage receiver for the active attendant, coverage, when activated, is invoked at all coverage stations including the inactive attendant.

However, if the Cover button is located in one of the two rightmost button columns,

coverage calls will not ring at these buttons.

● SLAC only—All calls covered by the common queue will be directed to the active

console.

Direct Group Calling: If the inactive attendant is a member of a DGC Group, calls directed to

the group will be routed to the inactive attendant.

The attendant must dial *4 (activate DGC Group “Make Busy”) to busy out from the group. Dialing *6 deactivates the “Make Busy” function.

Direct Inward Dialing: All DID calls to unassigned DID numbers will be transferred to the

active attendant.

2-44

Attendant Position Busy

Forwarding:

If a PDC/FPDC is signed in at an inactive attendant console, then calls to this PDC/FPDC will go to the active attendant (SLAC) or to the inactive attendant (DTAC only). All calls to FPDCs not signed in will be transferred to the active attendant.

Night Service: An inactive attendant that is a Directed Night Service receiver will receive

Night Service calls.

Park: A call parked on the inactive attendant console will return to the inactive console if the

call times out; calls parked via the Selector Console will return to the active console.

Personal Lines: All calls to trunks having an appearance in either of the two leftmost button

columns of a DTAC will ring normally at the inactive console. All calls to trunks having appearances in either of the two rightmost button columns will not ring. If these trunks also have an appearance at the active console, they will ring there even if they do not normally.

Program: The Program feature remains active at the inactive console. Programmable Buttons:

All DSS, Flex DSS, and REP DIAL buttons remain active on the

inactive console.

Administration Requirements

Attendant Console (Voice Terminal) Port:

● Assign Position Busy button on DTAC. A Position Busy button is defaulted to the

SLAC; it can be assigned to another feature if desired.

● Assign COVER-IND buttons between consoles (DTAC only).

System

● Designate “backup” multiline voice terminal (single-SLAC systems only).

2-45

FEATURES AND SERVICES

Attendant Release

Description

This feature releases the attendant from an extended call. There are two forms of Attendant

Release: Manual and Automatic. This feature applies to the Direct Trunk Attendant Console

(DTAC) and the Switched Loop Attendant Console (SLAC).

Manual Release:

Pressing RELEASE releases the attendant from an extended call and completes the associated call transfer. The status LED of the original calling facility will change from hold to busy for direct trunk terminations and from hold to idle for other call facilities {e.g., Loop, Return-On-Busy, Return-On-Don’t-Answer, Cover, Access).

Calls cannot be released to Reorder or Dial Tone. Pressing CANCEL terminates the destination call and reconnects the attendant to the calling

party. If the attendant goes on-hook without first releasing a call, the call extending operation will be terminated (the calling party will be disconnected).

Automatic Intercom, DSS, and System

Automatic Release:

This feature simplifies the attendant procedures by eliminating the need for the attendant to press RELEASE when releasing from one call to handle another. Selection of any new line facility while active on the Start button will automatically release the first call. At release, the status LED of the first calling facility will change from hold to busy for direct trunk terminations and from hold to idle for other call facilities (e.g., Loop, Return-On-Busy, Return-On-Don’t-Answer, Cover, Automatic Intercom, DSS, and System Access).

The Automatic Hold feature can be administered for the SLAC as an alternative to Automatic Release. if the attendant, active on a loop call, presses another loop button to place a call or pick up a held call, the active call is put on hold—not released.

Considerations

Attendant Manual Release improves attendant efficiency in handling calls by allowing the attendant to release an extended call without having to wait for the called station to answer.

Attendant Automatic Release enhances the attendant’s ability to handle many calls by eliminating the Release operation when answering a second call.

The Release function is inhibited whenever the Start facility is connected to Reorder or Dial Tone. Pressing CANCEL will terminate the destination call and reconnect the attendant to the calling party.

Administering the Automatic Hold option instead of Automatic Release reduces the occurrence of accidentally dropped calls.

2-46

Interactions

The following feature interacts with Attendant Release.

Attendant Release

Attendant Camp-On:

camped on.

External calls that are released when Busy Tone is heard will be

Administration Requirements

System with SLAC: Enable Automatic Hold feature? (yes for Automatic Hold or no for Automatic Release; default = no).

2-47

FEATURES AND SERVICES

Attendant Return Coverage On Busy

Description

This feature allows a camped-on call at a busy station or DGC Group to be returned to the attendant for service after a specified time period.

A camped-on call not answered within 1 to 120 seconds (administrable) after the attendant releases the call will return to the console in one of the following ways:

● On the Return-On-Busy (RTN-BUSY) button at a Direct Trunk Attendant Console

(DTAC).

● On a LOOP button at a Switched Loop Attendant Console (SLAC).

To answer a returned call at a DTAC, the attendant presses RTN-BUSY (if not selected by

Ringing Line Preference.) A returned call can be reextended via the START button or a Selector Console button. In either case, the Return-On-Busy button is idled as soon as the attendant releases.

To answer a returned call at a SLAC, the attendant merely lifts the handset to be connected to the ringing loop.

When the RTN-BUSY button is busy at a DTAC, the calling party will remain on-hold; if a loop

is not available at a SLAC, the returning call remains in the console queue. The system will continue to attempt to ring the called station until the RTN-BUSY button is idle or a loop is open. When Attendant Camp-On is not provided (Camp-On return time set to zero seconds), calls released by the attendant to busy tone are returned to the console immediately.

Considerations

Attendant Return-Coverage-On-Busy allows the attendant to service calls not answered

within specified time intervals.

This provides the calling party better service, and results in

fewer lost calls.

Interactions

The following features interact with Attendant Return Coverage On Busy.

Attendant Camp-On:

camped on. Attendant Console, Direct Trunk: As long as an Attendant Console remains active, the call

will return to the attendant who extended it.

External calls that are released when Busy Tone is heard will be

Attendant Console, Switched Loop: A returning call is directed from the common queue to a

LOOP button. In a two-console system, returning calls can be administered to go to the first

attendant, the second attendant, either attendant, or to the specific attendant who originated

the call.

2-48

Attendant Return Coverage On Busy

Attendant Direct Extension Selection: If a call to a Floating PDC (FPDC) is returned to the attendant, the FPDC’s status LED on the Selector Console will flash during ringing and go dark when the call is answered.

Direct Group Calling: External calls that are camped onto a DGC group that does not have a

delay announcement will return to the attendant console after the specified number of rings. Send All Calls DTAC only): If Send All Calls is activated, returning calls will ring at the

DTAC.

Administration Requirements

System:

● Assign number of seconds before unanswered camped-on calls return to the

Attendant Position (1-120 or 0 for no Camp-On; default = 30),

2-49

FEATURES AND SERVICES

Attendant Return Coverage On Don’t Answer

Description

This feature allows unanswered calls extended by the attendant to be returned to the

attendant for additional service. Calls that are not answered after a administered number of rings will transfer ringing to the

Return-On-Don’t-Answer (RTN-DA) button on a Direct Trunk Attendant Console (DTAC) or to a LOOP button on a Switched Loop Attendant Console (SLAC). If the called voice terminal has Coverage, the counting of rings for return begins only after the coverage station begins

ringing. If the terminal does not have Coverage but does have delayed ringing on System Access or Bridged Access buttons, the delay interval (administered as an equivalent number of rings) must expire before counting begins.

When the RTN-DA button is busy, calls will continue to ring at the called station until the

button is idle. If a SLAC is not available to receive the returning call, it stays in the common queue until it can be serviced.

To answer a returned call at a DTAC, the attendant presses RTN-DA (if not selected by

Ringing Line Preference.) The call can be reextended via the START button or Selector

Console. In either case, the RTN-DA button is idled as soon as the attendant releases.

To answer a returned call at a SLAC, the attendant merely lifts the handset to be connected

to the ringing loop.

Considerations

Attendant Return-Coverage-On-Don’t-Answer allows the attendant to service calls not

answered within a specified number of rings. This provides the calling party better service

and results in fewer lost calls.

Interactions

The following features interact with Attendant Return Coverage on Don’t Answer. Attendant Console, Direct Trunk: As long as an Attendant Console remains active, the call

will return to the attendant who extended it. Attendant Console, Switched Loop: A returning call is directed from the common queue to a

LOOP button. In a two-console system, returning calls can be administered to go to the first

attendant, the second attendant, either attendant, or to the specific attendant who originated

the call. Attendant Direct Extension Selection: If a call to a Floating PDC (FPDC) is returned to the

attendant, the FPDC’s status LED on the Selector Console will flash during ringing and go

dark when the call is answered.

2-50

Attendant Return Coverage On Don’t Answer

Coverage:

● DTAC only—Whenever a DTAC attendant is a coverage receiver for a particular

coverage group and a call is placed from the attendant position via the Start button or the Selector Console to a voice terminal in that group, the Coverage-Group (COVER-GRP) button on the Attendant Console will not track the call (COVER-GRP

button status LED will not flash). If the call remains unanswered, it will return to the

Attendant Console on the RTN-DA button rather than the COVER-GRP button.

● SLAC only—Whenever the common queue is a receiver for a coverage group and a

call is placed from the attendant position via the START button or the Selector Console to a voice terminal in that group, an unanswered call will return to attendant queue as a Return-On-Don’t-Answer call (instead of as a coverage call)

the

Send All Calls (DTAC only): If Send All Calls is activated, returning calls will ring at DTAC.

Administration Requirements

System:

● Assign number of rings before call return to the Attendant Position (1-31; default =

5).

the

2-51

FEATURES AND SERVICES

Attendant Source and Destination (SLAC Only)

Description

This feature allows the attendant, while extending a call, to switch back and forth between the calling party (the source) and the called party (the destination) before connecting them

together. Pressing the SOURCE button on the SLAC after the called party has been reached has these

results:

● The called party (the destination) is put on hold.

● The attendant is reconnected to the calling party (the source).

● The green status lamp of the DEST button starts winking to indicate that the

destination is on hold.

● The green status lamp of the SOURCE button goes from winking to dark.

Pressing the DEST button after the source has been reconnected has these results:

● The source is put on hold (again).

● The attendant is reconnected to the destination.

● The green status lamp of the SOURCE button starts winking to indicate that the

source is on hold.

● The green status lamp of the DEST button goes from winking to dark.

Considerations

The Source/Destination feature is useful when the attendant needs to talk to each party

privately before connecting them.

Interactions

The Source/Destination feature can only be activated before the two parties are connected together.

When the attendant presses JOIN, the other parties and the attendant are joined in a 3-way connection. When the attendant presses RELEASE, the other parties are connected, the call

is separated from the console, and the attendant is free to handle other calls. After the source and destination parties are connected together, the SOURCE and DEST status lamps go dark.

2-52

Attendant Splitting One-Way Automatic

Description

This feature allows the attendant to converse privately with a called party while the calling

party is split away on hold. When the attendant presses START (or a DXS button) to extend an incoming call to a called

party, the calling party is automatically split away from the connection and placed on hold.

This allows the attendant to talk privately with the called party before extending the call. The

attendant can then press RELEASE to complete the transfer or CANCEL to drop the called station and return to the incoming call.

If the console is a SLAC, the attendant can also use the Join and Source/Destination

features while in the Start mode. Refer to the descriptions of these features for details.

Considerations

Attendant Splitting One-Way Automatic allows the attendant to (1) announce a call, (2) determine privately whether the called party is available to receive the call, and (3) obtain

information if necessary to redirect the call or take a message.

Interactions

The following features interact with Attendant Splitting One-Way Automatic. Attendant Source/Destination (SLAC only): This feature can be used after reaching the

called party. It allows the attendant to speak privately to both the calling party and the called party before connecting them together.

Music-on-Hold: Music-on-hold is not provided to the calling party while the call is split from the console.

2-53

FEATURES AND SERVICES

Attendant System Alarm Indication

Description

This feature provides a visible alarm on the Attendant Console to alert the attendant to

problems detected by the system software.

flash whenever a detected fault persists longer than four minutes, or if more than five transient faults per hour are detected. The alarm indication should be reported immediately to

your AT&T Systems Technician.

The alarm type that causes an alarm indication is referred to as a Permanent System Alarm. These alarms are faults that can cause degradation of service and require immediate attention.

If a flashing ALARM button is pressed, the LED will change from flashing to steadily lit. A new trouble situation will cause a steady ALARM LED to start flashing again. Only when the trouble has been corrected will the LED turn off.

The ALARM LED on the Attendant Console will

Considerations

The ALARM LED on the Attendant Console provides a warning as soon as the fault is detected. This permits a quick response to system detected faults.

In a two-attendant system, both consoles track problems.

2-54

Automatic Intercom

Description

This feature allows a multiline voice terminal user (or attendant) to place and answer calls to

and from another station by use of a dedicated button appearance. Automatic Intercom provides a private path between two designated multiline voice terminals.

To place an Automatic Intercom call, the calling party presses the Automatic Intercom (AUTO ICOM) button and goes off-hook. The calling party hears ringback tone and the called party receives standard ringing. The status LED associated with the button is steadily lit at the calling voice terminal and flashing at the called voice terminal. To answer an Automatic Intercom call, the called party presses AUTO ICOM (not necessary with Ringing Line Preference) and goes off-hook.

The AUTO ICOM status LED lights steadily whenever the other party is off-hook. This

provides each party with a station-busy indication for the other. To activate the busy-to-idle reminder, the user can press AUTO ICOM (remaining on-hook). A short burst of tone is provided when the other party goes on-hook.

will be placed; the user does not press the AUTO ICOM button again.

The user can then go off-hook, and the call

Pressing AUTO ICOM to invoke the busy-to-idle reminder overrides Prime Line Preference. Once activated, the feature can only be canceled by preelection of another button or answering an incoming call. See the “Busy-to-Idle Reminder” feature description for more information.

At a Switched Loop Attendant Console, operation of an AUTO ICOM button seizes an idle loop button for the outgoing call. An incoming Automatic Intercom call arrives on a loop button and does not flash at the AUTO ICOM button of the console.

Considerations

The intercom feature should not be confused with ordinary station-to-station calling inside the system using dialed PDCs. other can do so by pressing one button instead of dialing a PDC. In addition, the station-

busy indication and busy-to-idle reminder provide additional utility to users.

This feature is similar to Direct Station Selection (DSS), except that the buttons must always

be assigned in pairs (i.e., between two sets.) Hence, an AUTO ICOM button cannot point to

a single-line set. providing calling party ID; DSS calls arrive on System Access buttons.

Also, Automatic Intercom calls arrive at the AUTO ICOM button, thereby

With Automatic Intercom, users who frequently call each

2-55

FEATURES AND SERVICES

Interactions

The following features interact with Automatic Intercom. Attendant Position Busy: The inactive attendant is permitted to place Automatic Intercom

calls. Automatic Intercom calls to an inactive DTAC where the AUTO ICOM button is located in one of the two rightmost button columns will not ring at the console, nor can they be covered by the active attendant. However, Automatic Intercom calls to an inactive SLAC will ring there.

Bridging of System Access Buttons: Calls on Automatic Intercom buttons on the principal station are not accessible from bridged call appearances on the bridging station.

Coverage: Automatic Intercom calls are considered private and do not receive coverage. Direct Group Calling: Automatic Intercom calls cannot be directed to DGC groups.

Exclusion: Any attempt to engage Exclusion while active on an Automatic Intercom call will

drop the other party. Last Number Dialed: Numbers called using an AUTO ICOM button are not saved by the Last

Number Dialed feature. Line Selection (Prime Line Preference): When the Automatic Intercom line is assigned Prime

Line status, the AUTO ICOM button must be pressed to activate the busy-to-idle reminder even though the I-use LED is already lighted steadily.

Pickup: When an Automatic Intercom call is answered via the Pickup feature, the AUTO ICOM status LED on the called voice terminal lights steadily. The called party can press AUTO ICOM to enter the call at any time.

Administration Requirements

Voice Terminal Port:

● Assign AUTO ICOM buttons to voice terminals in pairs. Voice terminals can have

several AUTO ICOM buttons assigned for direct access to multiple stations.

2-56

Automatic Route Selection (ARS)

Description

This feature provides for the routing of calls over the telecommunications network based on

preferred routes (normally the least expensive route available at the time the call is placed.)

An ARS pattern can be composed of two subpatterns (time of day determines which

subpattern is selected), each consisting of up to three routes, associated Facility Restriction Level (FRL) codes (described below), and CO overflow flags. A route is identified by specifying a Facility Access Code for the pooled facility (trunk group); a route may also be identified by specifying a Virtual Facility code.

A trunk group or virtual facility can be used in more than one ARS pattern and more than once within a pattern.

Call routing can be specified by as many as eight routing patterns. Each pattern contains a sequential list of routes (for example, trunk groups) the system can use to complete a call.

Number translations (deletion and addition of dialed digits) necessary to route the call is determined on a trunk group basis. Overflow to the local CO when all trunks in a pattern are busy or the route FRL is too high is optional. If all trunks in a pattern are busy (including CO trunks if overflow is allowed), the call may be queued (via the Callback Queuing feature) on the first route in the pattern.

All calls placed using the ARS access code (default = 9) are routed via the feature. The dialed numbers that follow the ARS access code are generally seven or ten digit DDD numbers preceded by a “ 1‘’ if required by the serving Central Office. Numbers preceded by a “0” are routed over the local CO pooled facility.

Typically, a dialed 7-digit number consists of a CO code and exchange number in the form

NXX-YYYY where N = 2-9, X = 0-9, and Y = 0-9. A 10-digit number consists of an area code, CO code, and exchange number in the form NPA-NXX-YYYY where N = 2-9, P = 0-1,

A = 1-9, X = 0-9, and Y = 0-9.

Each route in a pattern has an associated FRL (0-3), This FRL may differ each time the

facility is specified as a route. A facility with a FRL of “0” is least restricted to callers; a

FRL of “3” is the most restricted. Similarly, each station in the system is assigned an FRL (0-3). A terminal assigned an FRL of “0” has the least ARS privileges (i.e., routes with FRLs

of 1-3 are restricted); a FRL of “3” provides the most privileges. To use a route, a station’s

FRL must be equal to or greater than the route’s FRL.

The ARS feature, when accessed, selects a pattern as follows:

● Emergency Number Calls (routed via the local CO facility)

● Service Code (N11) Calls (routed via an associated routing pattern)

● International Calls (routed via the administered international pattern)

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FEATURES AND SERVICES

● Calls made to specified COs or seven digit telephone numbers within the Home

Number Plan Area (HNPA). These calls are routed as specified in the HNPA Exception Lists, or else via the NPA Routing Table or (by default if not otherwise specified) the local CO facility.

● Calls made to NPAs outside the HNPA, sometimes referred to as Foreign NPAs

(FNPAs). The route selected depends on the type of call, as follows:

FNPA special number calls (includes all “800”, “900”, and Telex 510, 610, 710, and 810 numbers). Each FNPA of the form N00 and N10 may be assigned to a routing pattern.

—

FNPA calls made to numbers specified in the FNPA Exception List.

—

All other FNPA calls.

ARS Flow Chart

Figure 2-8 provides a simplified ARS flow chart.

Bracketed numbers (e.g., [401], [601]) provide a link between ARS administrable action numbers and the associated item on the flow chart. Certain readers may find this reference useful when reading the following description in association with the System 25 Administration Manual. Administrable System, Station, Toll Allowed, and Trunk action numbers are also noted where applicable.

The ARS feature is accessed when a user dials the ARS access code. As shown on Figure 2-8, the number dialed is first checked against the Emergency Numbers List. This list consists of special service code 911 and up to three customer-defined seven digit numbers.

If the number dialed matches one of the numbers on the list, the call is immediately routed

via the local CO facility. All user call restrictions are disregarded. If the number dialed is not on this list, a check is made to determine if the terminal is allowed

to originate outside calls.

If the terminal is outward restricted, the caller receives Reorder

Tone; otherwise, the dialed number is checked against any toll restrictions that apply.

Terminals may be assigned a Toll Restriction Class (1-4), or be unrestricted (Class 0). Terminals assigned Toll Restriction Class 1 have the most privileges, those assigned Class 4

have the least privileges.

There are four associated Toll Call Allowed Lists (1-4) in the

system. Up to 64 3-digit CO codes and 6-digit NPA plus CO codes may be divided among

the four lists.

Numbers dialed from voice terminals assigned Toll Restriction Class 1 are checked against all four Toll Call Allowed (TCA) Lists;

numbers dialed from Class 2 terminals are checked against TCA Lists 2-4; numbers dialed from Class 3 terminals are checked against TCA Lists 3-4; and numbers dialed from Class 4 terminals are checked against List 4 only. If the number dialed does not appear on a list, the user receives Reorder Tone. Calls originated at unrestricted (Class 0) terminals are not screened.

Calls are checked to determine if they are international calls or operator calls. Dialed numbers “01” or “011” signify international calls, “0” plus a number other than “1” signify

operator calls (00 calls signify lntra-Lata operator calls). If the call is an international call, the

international routing pattern is selected and the call routed accordingly. Operator calls are

2-58

Automatic Route Selection (ARS)

routed via the local CO facility. Calls within the HNPA are checked to determine if a special N11 service code (N = 2-8) has

been dialed. Dialed N11 codes assigned a routing pattern are routed via the routing pattern. All other call types are checked against the HNPA Exception Lists. There may be up to four of these lists, each with an associated ARS Routing Pattern. Up to 800 3-digit office codes may be divided among the four lists (eight entries may be 7-digit numbers.) If a match is found, the call is routed via the associated ARS Routing Pattern. If no match is found the dialed number is routed via the HNPA pattern (specified in the NPA Routing Table), or if none is specified, via the local CO facility.

If a number is entered more than once in the exception list, the pattern used will be the pattern associated with the more specific number.

The NPA Routing Table is simply a listing of North American Plan NPAs and Special Number

NPAs, each having an associated ARS Routing Pattern (all North American NPAs are assigned routing pattern 1 by default). A dialed NPA that is listed in the table is routed using the associated Pattern. Calls to NPAs not listed are routed via the local CO facility.

The dialed numbers are checked against the FNPA Exception List. Up to 32 entries may be assigned to the list. Each entry must consist of a 3-digit NPA code, 3-digit CO code, and two additional digits (for a total of 8 digits). The last two digits may be “.”, which match any digit. Each entry has an associated ARS Routing Pattern. using this pattern. If no match is found, the call is then checked against the NPA Routing Table. A dialed NPA that is listed in the table is routed using the associated Pattern. Numbers that don’t match are routed via the local CO facility.

ARS Routing Pattern Table

Figure 2-9 provides a block diagram of an ARS Routing Pattern. Up to eight of these patterns may be administered in the system. Each pattern consists of two subpatterns that may be chosen based on the time of day. Each subpattern (A and B) can contain up to three allowed routes. If all routes in a subpattern are busy, a CO overflow flag (when set) allows

the call to be routed via the local CO facility; otherwise, the call will queue on the first route

in the subpattern.

Administrable Start and Stop times (Hour and Minute) for Routing Subpattern A specify when Subpattern A should be used to route calls. Subpattern B is used to route calls at all other times.

Each route is specified by its trunk group facility access code or Virtual Facility code and an

associated FRL. An FRL is typically lower for the first route in a subpattern and increases with each additional

route in the pattern. A terminal’s FRL must be equal to or greater than the route FRL for the route to be selected. The system first checks the Route #1 for an available trunk on which

to route the call. If the route is busy, Route #2 is checked, then Route #3, if required. if all

routes in the subpattern are busy and the CO overflow flag is set, the voice terminal FRL is checked against an associated Overflow FRL before routing the call.

if a match is found, the call is routed

2-59

FEATURES AND SERVICES

If all routes in a subpattern are busy and the CO Overflow flag is not set, or all CO trunks are busy, the call returns to the first route in the subpattern and may be queued (if the station FRL permits access to the first route) via the Callback Queuing feature. A route #1 must be specified in the subpattern for a call to queue. If it is not, callers receive Reorder Tone and will not be able to queue.

Once a route has been selected, the entries in a Digit Translations Table associated with the selected route’s trunk group or Virtual Facility is checked. Based on an associated NPA and the NPA dialed, the system can remove up to 10 digits and then add a pattern of up to 5 digits as specified to route the call.

The following tones are associated with ARS:

● Confirmation—Indicates that a queued call is being serviced (trunk available to route

call)

● Busy—Indicates that the called number is busy

● Reorder—Indicates that all trunks are busy or that ARS calling is denied.

Considerations

With ARS, users do not have to worry about accessing a particular pooled facility to make a long distance call. The user simply dials the ARS access code and the desired number. The system then routes the call via the facility best suited for that call.

The following provides a summary of the ARS call routing controls provided by the feature:

● Emergency Numbers List: 911, and up to three customer-defined, 7-digit numbers.

● Service Codes (N11 Numbers): An ARS Routing Pattern can be assigned to each

N11 (N = 2-8) Service Code. that the N11 number is a local CO code and will wait for four additional digits to be dialed before processing it as a local call.

● Toll Call Allowed Lists: 1-4 lists, 64 entries maximum between all lists. Entries may

be 3-digit CO codes or 6-digit NPA plus CO codes. (Administrable for uses besides ARS)

● Station Toll Restriction Class: 1-4 Classes (Administrable for users besides ARS)

● HNPA Exception List: 1-4 Lists: each with an associated ARS Routing Pattern. 800

3-digit CO codes entries maximum between all lists (eight of the entries may be 7digit numbers.)

● NPA Routing Table: Entries may include every North American NPA and Special

Number NPAs, each with an associated ARS Routing Pattern. All NPAs are assigned Routing Pattern #1 by default.

If no routing pattern is assigned, the system assumes

2-60

Automatic Route Selection (ARS)

● FNPA Exception List: One List with up to 32 eight-digit numbers. Each entry has an

associated ARS Routing Pattern.

● Digit Translations Tables: One per trunk group or Virtual Facility.

A system can have up to eight ARS Routing Patterns assigned. Each pattern can contain up

to six routes (three per subpattern).

Interactions

The following features interact with Automatic Route Selection. Bridging of System Access Buttons: When a station user originates a call on a Bridged

Access button and dials the ARS code, the call is completed according to the restrictions

assigned to that station, not the principal station.

Callback Queuing: Implementation of Callback Queuing affects ARS in three respects:

● On-hook ARS queuing is allowed.

● Callback Queuing and ARS share a common queue, which has a capacity of 64 calls.

● When a station without automatic queuing originates an ARS call, the caller hears

reorder tone if all routes are busy; the call can then be queued manually.

Calling Restrictions: Outward Restriction and Toll Restriction, when administered, prevent

calls from routing via ARS.

Pooled facility access restrictions do not apply. In fact, the recommended arrangement to ensure that users make maximum use of ARS is to block dial access to most trunk groups, so that users must dial the ARS access code to place calls.

Direct Facility Access Button: Multiline voice terminal users who have pressed FACILITY to

activate the busy-to-idle reminder must wait until all queued ARS users have been serviced.

Tie Trunks: Immediate Dial tie trunks should not be used in ARS routing patterns.

Virtual Facilities: Virtual Facilities may be used in place of trunk groups in ARS routing

patterns. When used with ARS, a digit translation scheme may be associated with each virtual facility. See the “Virtual Facilities” feature description for more information.

Administration Requirements

System:

● Specify your area code (HNPA).

● Specify whether “Dial 1”

● Specify whether “Dial 1” is needed for toll calls within of your area code.

is needed for calls outside of your area code.

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FEATURES AND SERVICES

ARS:

● ARS Access Code (1-9999; default = 9).

● International ARS Routing Pattern Number (1-8; no default).

● Three Emergency Numbers Lists (7-digit numbers; no default).

● NPA Routing Table (NPA code and associated pattern number 1-8; default = 1).

● N11 Routing Table (N11 code and associated routing pattern number 1-8 or 0 if this

code is a valid CO exchange requiring four additional digits to complete; no default).

● HNPA Exception List:

— List Number (1-4). — Pattern Number (1-8).

—

Exception Numbers (NXX or NXX-YYYY). Last three digits may be “.”

● FNPA Exception Telephone List:

— Pattern Number (1-8). —

Telephone Number (8-digits in the form NPA-NXX-YY; last two digits may be

“.”).

● Digit Translations Table:

—

Trunk Group Facility Access Codes (1-9999) or Virtual Facility Codes (#190-

#199).

— Associated NPA (NPA). —

Number of digits to remove for calls within associated NPA (1-10 digits, none).

—

Digit pattern to add for calls within associated NPA (maximum of 5 digits; default = none).

—

Number of digits to remove for calls not in associated NPA (1-10, none; default = none).

—

Digit pattern to add for calls not in associated NPA (maximum of 5 digits; default = none).

● ARS Routing Pattern:

— Pattern Number (1-8).

2-62

— Subpattern A Start and End Time (Hour: Minute).

— Subpattern A and B—Route 1, 2, and 3 Facility Access Codes (1-9999) or

Virtual Facility Codes (#190-#199). — Subpattern A and B—Route 1, 2, and 3 FRLs (0-3). — Subpattern A and B Overflows to CO facility (yes or no). — Subpattern A and B Overflow FRL (0-3).

Terminal Port:

● ARS FRL Level (0-3).

Automatic Route Selection (ARS)

2-63

FEATURES AND SERVICES

STATION USER DIALS ARS ACCESS CODE

[401]

NUMBER DIALED ON EMERGENCY NUMBERS LIST

(911, AND THREE CUSTOMER DEFINED 7-DIGIT NUMBERS

[ 601 -603]

YES

VOICE TERMINALS

“RESTRICT OUTWARD CALLS” = YES

YES

VOICE TERMINAL ASSIGNED TOLL RESTRICTION CLASS 1-4

YES

RECEIVES SYSTEM

REORDER TONE

NUMBER DIALED INTERNATIONAL, OPERATOR, OR OTHER

OPERATOR

INTERNATIONAL

ROUTE CALL VIA INTERNATIONAL ROUTING PATTERN

[402]

OTHER

(SHEET 2)

2-64

Figure 2-8.

Automatic Route Selection Flow Chart (Sheet 1 of 2)

FROM SHEET 1

NUMBER DIALED WITHIN HOME NPA?

OUTSIDE HOME

NPA (FNPA)

NUMBER DIALED ON FNPA

EXCEPTION LIST

Automatic Route Selection (ARS)

CALL ROUTED VIA ASSOCIATED ROUTING PATTERN

SYSTEM [30]

YES

SPECIAL N11

SERVICE CODE

DIALED

[ 900]

NUMBER DIALED ON HOME NPA EXCEPTION LISTS

[500]

YES

HOME AREA CODE

ON NPA ROUTING TABLE [300]

CALL ROUTED VIA LOCAL CO FACILITY

CODE HAS AN ASSIGNED ROUTING PATTERN

[901]

AREA CODE ON NPA ROUTING TABLE [300]

CALL ROUTED

YES

VIA ASSOCIATED

ROUTING PATTERN

YES

CALL ROUTED VIA ASSOCIATED ROUTING PATTERN

CALL ROUTED

YES

VIA ASSOCIATED

ROUTING PATTERN

Figure 2-8.

Automatic Route Selection Flow Chart (Sheet 2 of 2)

2-65

FEATURES AND SERVICES

ROUTING SUBPATTERNS (RSP) A AND B

RSP A ROUTE 1 ROUTE 2

START/ STOP

ROUTING

PATTERNS

(1-8)

[100]

[200] [211]

TIME

[101] , [ 102]

RSP B

POOLED FACILITY ACCESS CODE

[110]

FRL (0-3) FRL (0-3) FRL (0-3) FRL (0-3) [111]

ROUTE 1

POOLED

FACILITY ACCESS

CODE

FRL (0-3) FRL (0-3) FRL (0-3) FRL (0-3)

DIGIT TRANSLATIONS TABLE ASSOCIATED WITH POOLED FACILITY

OR VIRTUAL FACILITY.

DELETE DIGITS (0-10)

ADD DIGITS (MAX 5)

POOLED

FACILITY ACCESS CODE

[120]

[121]

ROUTE 2

POOLED FACILITY ACCESS CODE

[221]

ROUTE SELECTED

[700S]

ROUTE 3

POOLED FACILITY ACCESS CODE

[130]

[131]

ROUTE 3

POOLED FACILITY ACCESS CODE

[221] [241]

OVERFLOW

FLAG

[140]

[141]

OVERFLOW

FLAG

ALL ROUTES BUSY

ROUTE CALL

VIA DDD

NETWORK

YES

ROUTE 1

2-66

Figure 2-9.

Automatic Route Selection Routing Pattern

Bridging of System Access Buttons

Description

This feature allows a multiline station user to handle calls on Bridged Access (BA) buttons

associated with System Access (SA) buttons of another multiline station (Figure 2-10 ).

The following terms are used throughout this feature description:

● Principal station

—a multiline voice terminal that has SA buttons bridged by one or

more other multiline stations.

● Principal—the user of a principal station.

● BA button—a special call appearance button on a multiline station administered to

correspond to a specific SA button on another user’s station (the principal station); collectively referred to as bridged appearances.

● Bridging station

—a multiline voice terminal with one or more BA buttons.

A BA button can be assigned to any programmable feature button on a bridging station, but it does not take the place of an SA button. The SA buttons on the bridging station can be bridged by other stations.

❑

SYS ACC

❑ 3021

❑

SYS ACC

❑ 3021 ❑

❑ ❑

❑

—

❑ ❑

—

❑ ❑

❑

SYS ACC

❑ 3022 ❑

SYS ACC

❑ 3022 ❑

BRIDGE

❑ 3021 ❑

BRIDGE

❑ 3021 ❑

❑

❑ ❑

Figure 2-10. Typical Bridging Arrangement

A bridging station user is able to originate calls from BA buttons and can answer calls for the principal. The bridging user can also enter existing calls on bridged appearances by simply going off-hook on the BA button, unless Exclusion has been activated or the maximum of five active parties on a call has been reached.

2-67

FEATURES AND SERVICES

The user active on a BA button can use many features with the bridged call; operation is no different from calls on other buttons. For example, Hold, Conference, and Transfer can be used from a BA button just as they would be used from an SA button. Calling restrictions applied to calls made on bridged appearances are those of the bridging station, not those of the principal station.

System 25 has the following bridging capacities and limitations:

● The number of principal stations is limited only by the number of multiline sets on the

system.

● The number of SA buttons a principal station can have is limited only by the number

of available buttons on the terminal.

● Each SA button on a principal station can have a bridged call appearance on up to

16 multiline voice terminals.

● The number of principals for which a station has bridged call appearances is limited

only by the number of available programmable buttons.

● The maximum number of parties active on a bridged call is five (no more than two of

these may be outside parties).

Incoming calls ring the principal station and its bridging stations according to ring options specified by the System Administrator. not send, ringing to the bridging station; immediate ring, delayed ring, or no ring for incoming calls.

The principal station can be administered to send, or

both stations can be administered to receive

Table 2-F summarizes the effect

of different settings for these ring options.

Table 2-F.

Bridged Ringing Options

Bridging Station

Principal Station

Administered to send ring on no answer?

Administered to send ring on busy?

yes

No Ring

Immediate Ring

Administered Administered

no ring immediate ring delayed ring no ring

no ring* no ring immediate ring delayed ring no ring

no ring*

Delayed Ring

Administered

no ring*

* When Send All Calls is enabled at the principal station, immediate

ringing occurs in these situations.

As with standard System 25 operation, off-hook stations receive abbreviated alerting instead of repeated ringing. In addition, ring options have no effect on visual alerting via status LEDs on SA or BA buttons.

When an inside or outside call comes into an SA button of an idle principal station, it and each bridging station receive ringing, according to options set by the System Administrator, and visual alerting with a flashing status LED. If one of the users picks up the call, the green

2-68

Bridging of System Access Buttons

status LEDs of the SA button and the bridged appearances light steadily. If neither principal nor bridging user answers, the call goes to the principal’s coverage—if provided—in the usual way. When the covering station answers, the status LEDs at the principal and bridging stations light.

When a call comes into an idle SA button of a principal who is busy on another SA button, the bridging station(s) will receive flashing (and ringing, if administered) on the bridged

appearance of the called button. A bridging station can answer the call. A call to a principal with all SA buttons busy will receive busy tone unless coverage is

available or Call Waiting is administered.

Bridging stations do not have access to the call.

Considerations

The bridging feature meets the needs of

parties place and receive calls on the complete coverage of all incoming calls. answering patterns.

It is recommended that each SA button at a principal station have a corresponding BA button at the bridging station. the principal’s SA buttons.

Except for their bridging functions, bridging stations operate independently of their associated principal stations.

The bridging feature applies only to calls appearing on the SA buttons of a principal station. Calls on Automatic Intercom, Personal Line, DSS, and Flex DSS buttons are not accessible from a BA button.

With this arrangement, the bridging user can track all calls coming to

executive/secretary type arrangements where both

same extension numbers. Bridging allows more

It provides options that can enable several call-

Interactions

The following features interact with Bridging. Abbreviated Ringing: When a call arrives on an SA button of the principal, off-hook

stations— ringing. The green status LEDs of the SA button and the BA button associated with the incoming call continue to flash after the abbreviated ring.

principal and bridging

—that have bridged ringing enabled receive abbreviated

Account Code Entry: A station user can use the Optional Account Code Entry feature for

incoming or outgoing calls on bridged appearances. If a bridging station user has the Forced

Account Code Entry (FACE) feature, an account code must be entered for all applicable outgoing calls on both SA and BA buttons.

Attendant Positions: Direct Trunk Attendant Consoles cannot serve as principal stations. Switched Loop Attendant Consoles cannot serve as either principal or bridging stations.

2-69

AT&T System 25 R2V1 - Reference Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

OVERVIEW

Introduction

Organization

System 25 Description

Call Handling Capabilities

Safety

Business Communications Needs

Incoming Business Communications

Outgoing Business Communications

Internal Call Movement

Data Communications

Growth & Rearrangement

Conclusions

Introduction

FEATURES AND SERVICES

Account Code Entry, Forced

Account Code Entry, Optional

Attendant Call Extending

Attendant Camp-On

Attendant Cancel

Attendant Console, Direct Trunk

Attendant Direct Extension Selection

Attendant Forced Release (SLAC Only)

Attendant Join (SLAC Only)

Attendant Message Waiting

Attendant Position Busy

Attendant Release

Attendant Return Coverage On Busy

Attendant Return Coverage On Don’t Answer

Attendant Source and Destination (SLAC Only)

Attendant Splitting One-Way Automatic

Attendant System Alarm Indication

Automatic Intercom

Automatic Route Selection (ARS)

Bridging of System Access Buttons