AT&T 5ESS User Manual

5ESS Digital (ISDN) Telephone User Guide

On this page:

Overview
Your Digital Telephone Desk Set
Te le p ho n e C al l s
Intercom Calls
Call Forwarding
Call Pick-Up Group
Speed Dialing
Ring, Clock, and Test Buttons
The Display Panel
Appendix: Classes of Telephone Service

Overview

This guide describes how to use the voice features of the Lucent/AT&T ISDN (Integrated Services Digital Network) digital telephone
with MIT's 5ESS telephone system. These features will work only when your Lucent/AT&T telephone is correctly connected to the
5ESS.

In addition to standard voice communications, digital telephones can carry data communications between a microcomputer or
workstation that is connected to the telephone and a remote computer.

Tel epho ne C usto mer Serv ice

To provide fast and efficient service each MIT department is assigned a Customer Service Representative (CSR). Your CSR can be
reached at 617.253.4357.

Tel epho ne H ELP Lin e

If you have trouble with telephone or data communications service, call the Telephone HELP desk at 617.253.4357 (x3-HELP).

Voi ce M ail

MIT's voice mail system works in conjunction with the 5ESS telephone system. Voice mail is a computer-based message system that
goes beyond the functions of the usual answering machine. Voice mail lets you send, forward, and reply to messages; send messages
to a distribution list; archive messages; and give special access to a secretary. You can get assistance with your voice mail from your
CSR at 617.253.4357.

Your Digi tal Te lephon e Des k Set

Desk Set Controls and Features

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This section describes the digital phone's components. Terms that are discussed in this and later sections are introduced in italics. Also
included are information and procedures for desk set controls and features that apply to all types of calling.

To avoid interruptions in phone service:

Never unplug your desk set.

Never plug another desk set into your phone jack.

Never plug any accessory into your desk set.

Never plug the receiver into any other jack.

Digital desk sets have two types of buttons: Call Appearance and Feature. Press near the center of a button to activate it. If you wish
to change button labels, follow the instructions on the bottom of the desk set.

Call Appearance (CA) Buttons

Call Appearance (CA) buttons are used to place and receive phone calls, including intercom calls. Each CA button has two status
lights associated with it. The red light indicates the CA is in use, or will be used when the receiver is lifted. The green light indicates
that a call is in progress or a feature has been activated. CAs are labeled with a directory or an intercom number.

Directory Number (DN)

A directory number is a telephone number. Calls placed within MIT from an MIT phone require only the five-digit MIT number
(beginning with the prefix 2-, 3-, 5-, 8-, or -7). Calls to MIT from off-campus require the full ten-digit MIT phone number (beginning with
the prefix 225-, 252-, 253-, 258-, 324-, or 577-).

Primary Directory Number (PDN)

Each digital desk set is assigned a primary directory number (PDN). The PDN is usually the MIT phone number for the person or office
"owning" the desk set.

Secondary Directory Number (SDN)

A secondary directory number (SDN) is any number other than the primary directory number that appears on a telephone. SDNs may
be additional numbers assigned to a phone or numbers shared with other phones. SDNs cannot have voice mail.

Call Appearance Assignments

Digital technology makes it possible to assign the same directory number to more than one Call Appearance button. Your PDN is
always assigned to a minimum of two CAs on your desk set. This means that you can have at least two calls going at once, even
though your telephone is set up for only one directory number.

The last CA of a number is reserved for outgoing or intercom calls. If your PDN has only two CAs, calls can usually come in only on the
first CA. If you have answered or placed a call on the first CA, a second call can't come in. When placing calls you can leave the first
CA open for incoming calls by pressing the second CA of your PDN before making the call.

If you receive many calls you may want to opt for one of two permanent solutions. You can modify the second CA to receive incoming
calls, or you can add a third CA. Call your Customer Service Representative for details and costs.

Feature Buttons

Feature buttons activate special functions of the digital telephone. Features are either fixed or flexible.

Fixed Feature Buttons

Most Fixed Feature buttons control two functions: one for processing calls and an alternate function for controlling the desk set. Fixed
Features for call processing work with any type of call, on PDNs or SDNs. You select alternate functions by pressing Shift/Select first.
Refer to the appropriate section in this guide for details on fixed features. Some Fixed Feature buttons have a green status light
associated with them.

Flexible Feature Buttons

Flexible Feature buttons activate functions other than fixed features; for example, call pick-up and speed dialing. You request flexible
features when ordering new service or additions to existing service. Flexible Feature buttons are installed only on those phones for
which they are ordered, and work only with a desk set's PDN.

Other Desk Set Features

In addition to Call Appearance and Feature buttons, the digital desk set includes the following components.

Dialing Keypad

Use the alphanumeric keypad for entering telephone numbers and code numbers. The keypad is also used with the voice mail system.
Two keys have special functions in both the 5ESS and voice mail systems:

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"Star" or asterisk key "Pound" or number key

Display Panel

The display panel is a small screen at the top of the desk set (with a knob to adjust its contrast). It displays the date and time when the
phone is not in use, or displays information about calls when in use. For details, see Section 9, " The Display Panel."

Message Light

If you subscribe to voice mail, the Message light indicates that new messages are in your voice mailbox.

Data/Send/Off Button

The Data/Send/Off button carries data communications between a microcomputer or workstation connected to the digital set and a
remote computer. Data calls do not interfere with placing or receiving voice calls -- they can occur simultaneously.

Speakerphone

The Speakerphone lets you place and answer calls without lifting the receiver. The microphone and speaker are located in the desk
set, under the receiver. When using the Speakerphone, speak toward the front of the desk set.

1. To activate the Speakerphone, press

2. To disconnect, press

then press

Adjusting Volume of Ringer and Receiver

The Volume button controls the loudness of your phone's ring, and the voice level of the receiver and Speakerphone. You can change
the loudness of the phone's ring whenever you are not on a call. You can change the voice level of the receiver or speaker only when
you are on a call.

1. Press the arrows until you hear the desired volume.

Left arrow lowers the volume; right arrow raises the volume.

Result: Each press adjusts the volume.

Digital Phone Options

The 5ESS and the digital telephone provide optional features and services that you can order as new service or changes to existing
service. Two call-handling options, ringing line preference and reserved call appearances, are described below. Other options --

intercom calling , call pickup groups , and speed dialing -- are explained in their own sections elsewhere in this guide. For more

information on these options, and other options not covered in this guide, contact your Customer Service Representative.

Ringing Line Preference

With ringing line preference you do not have to press a CA to answer or place a call -- the appropriate CA will be selected
automatically when you lift the receiver or press Speaker. If you are on a call and another comes in, put the first call on hold and press
Drop to connect to the second call. Ringing line preference is not recommended for digital desk sets carrying more than one phone
number.

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Reserved Call Appearance

All CAs for directory numbers let you place and receive calls (two-way calling). With reserved Call Appearance, you can, however,
order one CA reserved for one-way calling. Choose from the following types of reserved CAs.

• Originate: You can use the CA to place outgoing calls only; calls cannot be received on it.

• Terminate: You can use the CA to receive incoming calls only; calls cannot originate from it.

• Originate/Priority Terminate: You can use the CA to place outgoing calls, or to receive intercom (priority) calls.

For example, your PDN is assigned three CAs on your desk set and you have reserved one of those as Originate/Priority Terminate. If
two CAs are active with calls, the third CA can be used only to place a call or receive an intercom call. In such circumstances, a regular
incoming call will get a busy signal.

Tele phone Call s

Placing a Call

You place outgoing calls from your primary directory number (PDN) or a secondary directory number (SDN). If you are not on a call,
the red light of the call appearance (CA) you will be using is on. If you wish to use a different CA, press another CA button.

1. Lift the receiver or press

Result: The green light of the CA you selected comes on and you hear the dial tone.

2. Dial the telephone number.

Answering a Call

The phone rings and the green light flashes on the CA carrying the call.

1. Lift the receiver or press

2. Press the CA button with the flashing green light.

Result: The red light comes on for that CA and you are connected to the caller.

Note: If you are on a call when another comes in, the phone rings only once, but the green light for the CA carrying the call flashes. To

answer the second call, put the first call on Hold, then press the second call's CA.

Putting a Call on Hold

Both status lights of the CA you are using are on.

1. Press

Result: The red light of the CA goes out and the green light blinks rapidly. The call is on hold. Press another CA to place a call, or

Return to a Held Call

The green light of the held call's CA blinks rapidly.

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1. Press the CA button for the held call.

Result: The red light comes on and the green light stops blinking. You are reconnected to the call.

Note: If the call was put on hold at a digital set, you can reconnect on another digital set with the same DN (PDN or SDN). If the call

was put on hold at an analog set, you can reconnect only on that phone.

Trans ferri ng a Call

You can transfer an active call (not on hold) to another phone on campus.

1. While on the active call, press

Result: You hear the dial tone. The red light for that CA goes off, the green light blinks rapidly. The call is held for transfer. You are
given an available CA. If the call is on a DN with no other CAs available, select an available CA of another number.

2. Dial the MIT telephone number to which you want to transfer the call.

3. When the call is answered, announce that you are transferring a call and press

again.

Result: The call is transferred.

Placing a Conference Call

You can set up a three-way conference call from your digital phone with two other parties on or off campus.

1. While on the active call, press

Result: The call is held for conference. The red light for that CA goes off, the green light flutters. The next available CA for that DN is
selected and its red and green lights come on; you hear the dial tone. If the call is on a DN with no other CAs available, select an
available CA of another DN.

2. Dial the number of the third party to add to the call.

3. When the third party answers, announce the conference call and press

again.

Result: You are connected to the other two parties.

Activate Muting

Muting prevents the party on the other end of a call from hearing a conversation at your end. Muting works with both the
Speakerphone and the handset, and is more effective than putting your hand over the mouthpiece.

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