AT&T PagePac Plus AmpliCenter, PagePac Plus AMPLICENTER D20, PagePac Plus AMPLICENTER D100, PagePac Plus AMPLICENTER D300 Installation And Use Manual

463-248-202

Issue 1

3/16/93

PagePac Plus AmpliCenter

Installation and Use

Copyright 1993 Harris Dracon
All Rights Reserved
Written/Printed in U.S.A.

AT&T 463-248-202

0II722051-300

Issue 1, March 1993

Notice

Every effort was made to ensure that the information in this guide was complete and accurate at the time of printing.
However, information is subject to change.

Federal Communications Commission (FCC) Interference Notice and Canadian Dept. of Communications
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15
of the FCC rules and D.O.C. regulations. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction guide, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to clause
harmful interference, in which case the user will have to correct the interference at his or her own expense. For
repair information, see section 4, Maintenance and Customer Support, and for additional FCC interference and
registration information, see appendix A, FCC Statement and Warranty Information, in this manual.

Trademarks

PAGEPAC, PAGEPAC PLUS and AMPLICENTER are trademarks of Harris Corporation. Centrex is a registered
trademark of AT&T.

Warranty

AT&T provides a limited warranty for this product. Refer to ''AT&T Limited Warranty and Limitation of

Liability" in appendix A.

Ordering Information

The order number for this book is 463-248-202. To order copies of this book, call 1-800-432-6600 in the U.S. and

1-800 255-1242 in Canada. For more information on how to order this and other system reference materials, see
"Reference Materials," in "About This Guide." For information on ordering replacement parts, accessories, and
other compatible equipment refer to "Ordering Information," in section 1.

Support Telephone Numbers

AT&T provides a toll-free customer Helpline 24 hours a day,
In the U.S., call the AT&T Helpline at 1-800-628-2888 if you need assistance when installing, programming, or

using your system. For service or technical assistance in Canada call one of the following Technical Assistance
Centers:

Eastern Canada and Ottawa:

1-800-363-1882

Ontario:

1-800-387-4268

Central and Western Canada

1-800-663-9817

VG—3193-2.2M

Contents

1.

Overview

1-1

■

■

■

■

■

■

■

■

■

■

■

■

■

About This Guide
How to Use This Guide
Before You Start
Installation Steps
Connectivity Chart
Product Safety Labels
Terminology
Reference Materials

How to Comment on This Guide
Shipping Container Contents
Ordering Information

Features and Capabilities

Specifications

1-2
1-2
1-2
1-3
1-4

1-6
1-6
1-6
1-6
1-7
1-8
1-9
1-10

2. Hardware Configuration

2-1

■

■

■

■

■

■

Power

2-2

Circuit Protection

2-2

Mounting

2-2

Universal Approvals

2-3

Controls and Indicators, Terminals and Connectors

2-3

Auxiliary Equipment

2-5

iii

3. Installing the Hardware

3-1

■

■

■

■

■

■

■

Important Safety Information
Example System Setup

Mounting PagePac Plus AmpliCenter
Connecting Speakers
Telephone System Interface
Music Source Interface
System Testing

3-2
3-3
3-6
3-8
3-9
3-11
3-13

4.

Maintenance and Customer Support

4-1

■

■

■

■

■

In Case of Difficulty

4-2

Power Failure Operation

4-3

Common Problems

4-3

Troubleshooting

4-3

Electrical Block Diagram

4-5

A. FCC Statement and Warranty Information

A-1

B. Feedback Form

B-1

IN. Index

IN-1

iv

Tables

1.

Overview

1-1

1-1. PagePac Plus Connectivity Chart

1-4

1-2. AmpliCenter Specifications

1-10

2.

Hardware Configuration

2-1. Controls and Indicators, Terminals and Connectors

2-1

2-4

v

Figures

1.

Overview

1-1

1-1. Installation Steps

1-3

1-2. AmpliCenter Components

1-7

1-3. PagePac Plus AmpliCenter

1-9

2. Hardware Configuration

2-1

2-1. AmpliCenter Controls and Indicators,

Terminals and Connectors

2-3

3.

Installing the Hardware

3-1

3-1.

3-2.
3-3.
3-4.
3-5.
3-6.

3-7.

AmpliCenter Interface with PagePac Plus Controller

3-4

Series AmpliCenters, without Controller

3-5

Wall Mounted Hardware

3-6

Rack Mounted Hardware

3-7

Speaker Run Method

3-8
AmpliCenter Interconnection to Telephone System
or to Controller

3-10
Music Input Connections

3-12

4. Maintenance and Customer Support

4-1

4-1. AmpliCenter Electrical Block Diagram

4-5

vi

Overview

Contents

About This Guide
How to Use This Guide
Before You Start
Installation Steps
Connectivity Chart
Product Safety Labels
Terminology
Reference Materials

How to Comment on this Guide
Shipping Container Contents
Ordering Information
Features and Capabilities

Specifications

1-2
1-2
1-2
1-3
1-4
1-6

1-6
1-6
1-6
1-7
1-8
1-9

1-10

Overview 1-1

About This Guide

The PagePac Plus AmpliCenter Installation and Use Manual explains the
features of the AmpliCenter, how to install and configure the AmpliCenter,
and interface to a communication system and other auxiliary equipment.

It is intended that PagePac Plus be installed by a trained telephone, audio,
or electrical installer with basic electronic knowledge. PagePac Plus
conforms to common installation practices and preferences found within
the Telcom Electrical and Commercial Sound installers manual.

How to Use This Guide

■

■

■

■

Overview.

This section provides an overview of AmpliCenter features

and capabilities, specifications, and a summary of installation steps for

the experienced installer.

If you are installing the PagePac Plus AmpliCenter for the first time,
you should read this entire guide before getting started to familiarize
yourself with the features.

Hardware Configuration.

This section describes and illustrates the

AmpliCenter D20, D100, and D300 units.

Installing the Hardware.

This section provides instructions for

mounting the PagePac Plus AmpliCenter hardware on a wall or in a
standard 19" equipment rack. Complete, detailed instructions for
connection and operation with telephone systems, music source,

speakers, and any control device inputs or outputs is provided.

Maintenance and Customer Support.

This section gives some basic

troubleshooting tips if a paging zone does not operate properly after

connection to the AmpliCenter. Should a problem arise which requires
technical assistance, call AT&T technical support groups at the

numbers listed in this section.

Use the Contents and Index to locate specific items of interest.

Before You Start

Before installing your system, read and understand the safety instructions
in section 3. Be sure you have all the necessary parts— see Shipping
Container Contents, below. In addition, see Tools Required in section 3

for a few tools and test equipment that will be needed for installation.

1-2 Overview

Installation Steps

NOTE: The numbers in these
steps match the numbers in
figure 1-1.

1.

2.

3.

4.

5.

6.

7.

Mount the PagePac Plus AmpliCenter to either the wall, cabinet or a
rack.

Pull cables.
Hookup cabling to AmpliCenter and auxiliary equipment. (Refer to

Example Setups in section 3.) Use stick-on labels to identify the
AmpliCenter/zone (i.e., cafeteria - zone 1).

Set the AmpliCenter Telephone Mode Selection Switch to match the
host telephone system and make connection.

Install power cord and plug into outlet.

Test paging zone served by the AmpliCenter. (Refer to Testing the

System, in section 3.)

Adjust sound levels using AmpliCenter controls. (Refer to
Adjustments, in section 4.)

TO HOST TEL.
SYSTEM

MUSIC INPUT

Figure 1-1. Installation Steps

Overview 1-3

Connectivity Chart

The Connectivity chart gives the trunk interface requirements for the host
systems listed. This information is then used to set the telephone mode
function switch on the PagePac Plus AmpliCenter.

Table 1-1. PagePac Plus Connectivity Chart

Merlin Plus

Merlin 206/820

Merlin 1030/3070

Merlin II

Merlin Legend

Mode

C.O.
Line

Page
Port

C.O.
Line

Page

Module

C.O.
Line

Service
Module

C.O.
Line

Analog
Station

C.O.
Line

Analog
Station

Loop
Start

Yes

Note 1

—

—

—

Ground
Start

3

—

—

—

—

Yes

Note 1

—

—

—

—

—

—

—

Yes

Note 1

—

—

—

—

—

—

—

Yes

Note 1

—

—

—

—

—

—

—

Yes

—

—

—

—

—

—

—

Dry
Loop

(Hi Z)

Dry

Loop

(600 Ω)

Spirit 308/616

Spirit

1224/2448

Partner

Partner II

Partner Plus

Mode

C.O. Line

Page Port

C.O. Line

C.O. Line

Analog
Station

C.O. Line

Analog
Station

Page
Port

Loop

Yes

—

Yes Yes

—

Yes

— —

Start
Ground

—

—

—

—

—

—

—

—

Start

3

Dry

—

— —

—

—

—

—

Loop

—

(Hi Z)
Dry

—

No

—

—

— —

—

Yes

Loop

Note 2

(600 Ω)

1-4 Overview

Table 1-1. PagePac Plus Connectivity Chart (Continuation Page 1)

System 25

System 75/G1/G3I Definity

System 85/G2

Mode

C.O. Line

Analog
Station

Aux.
Port

C.O.
Line

Analog
Station

Aux. Port

C.O.
Line

Analog
Station

Aux.
Port

Loop

Yes

—

—

Yes —

—

Yes

— —

Start
Ground

Yes —

—

Yes

—

—

Yes

— —

Start

3

Dry

— — — —

— — —

—

—

Loop

(HI Z)
Dry

Yes

Yes

Yes

Loop

Note 2 Note 2

Note 2

(600

Ω)

— Indicates a non applicable connection

Comkey 416, 718
1434 and 2152

Horizon

Dimension

Mode

C.O. Line

Intercom

C.O. Line

Analog

Station

Intercom

C.O. Line

Analog
Station

Aux.
Port

Loop
Start

Ground
Start

3

Dry
Loop
(HI Z)

Dry
Loop
(600

Ω)

Yes

—

Yes

—

—

Yes

—

—

—

—

No

—

—

—

—

—

Yes

—

—

No

Yes — —

Yes

— —

—

Yes

—

— —

Yes

Note 2

NOTES:

1. Two pound keys (##) must be pressed for one pound key (#) to be sent to the AmpliCenter when dialing
from a multi-button set.

2. A 2 pair RJ-11 cord must be used to interface with the AmpliCenter.

3. Ground Start trunk for tel. system must share a common ground with AmpliCenter page input ground.

Overview 1-5

Product Safety Labels

This guide contains several product safety labels, identified by a

CAUTION

- Indicates the presence of a hazard that will or can cause

minor personal injury or property damage if the hazard is not avoided.

WARNING

- Indicates the presence of a hazard that can cause

severe or fatal personal injury if the hazard is not avoided.

Carefully read all WARNING labels. Opening the system modules will
expose you to hazardous voltages, which can cause severe personal
injury or death. Also, read "Important Safety Information" at the beginning
of Section 3, Installation.

Terminology

This guide uses standard telephony, audio, and electronics terminology

used in describing paging features, hardware, and telecommunication

system interface.

Reference Materials

For related product information, refer to the

PagePac Plus Programming

and Operation Guide. Also, see the PagePac Plus Controller Installation
and Use Guide and Zone Expansion Unit Installation and Use Manual

for

specific information on those products.
To order additional reference materials

Information Center:

In the U.S. 1-800-432-6600
In Canada: 1-800-255-1242

How to Comment on This Guide

call the AT&T Customer

A feedback form is located at the end of this guide. If the feedback form is
missing, send your comments and recommendations for changes to:

A. Sherwood
AT&T
99 Jefferson Road (Room 2A-25)

Parsippany, NJ 07054
FAX: [phone]

1-6 Overview

Shipping Container Contents

The following items should be found in the PagePac Plus AmpliCenter
shipping container.

■ AmpliCenter module

■

Rack mounting hardware (4 Phillips 10-32 screws)

■ Power Cord

■

This Installation and Use guide

AMPLICENTER D20, D100, D300

FOUR MOUNTING SCREWS

INSTALLATION MANUAL

AmpliCenter
Installation and Use

POWER CORD

Figure 1-2. AmpliCenter Components

Overview 1-7

Ordering Information

Equipment is available from many AT&T sources. Contact any of the

following for sales information and advice on the equipment that would

best meet your needs:

AT&T Catalog Sales

1-800-451-2100

AT&T Sales Office

1-800-247-7000

AT&T Phone Center Store

1-800-222-3111

AT&T Authorized Dealer

1-800-247-1212.

1-8 Overview

Features and Capabilities

The following list provides an overview of the features of the PagePac
Plus AmpliCenter.

Amplifies paging

— The AmpliCenter amplifies the page in increments
of 20 watts (D20), 100 watts (D100), or 300 watts (D300) for a 70V
constant voltage distribution system.

Paging input

— The AmpliCenter accepts inputs from PBX trunk ports,

dry loop page ports, or amplified microphones.

Music interface

— The AmpliCenter is the unit to which the background
music source (CD, radio, tape player) is connected, for distribution to
the paging system.

Volume control

— The AmpliCenter has music ducking (mute) level,
music volume level, and bass control adjustment pots on the rear
panel. Overall output level can be controlled by dialing a DTMF code.

Remote amplifier connection

— The AmpliCenter provides 0 dBm
audio output for connection to a remote amplifier, which receives a
contact closure control signal from the AmpliCenter.

AmpliCenter D20, D100, D300

PEC 5328-020, -100, -300

MOUNTING
BRACKETS

Figure 1-3. PagePac Plus AmpliCenter

Overview

1-9

Specifications

Table 1-2. AmpliCenter Specifications

Capacities

■ D20: up to 20 Watts total speaker load

■ D100: up to 100 Watts

■ D300: up to 300 Watts

Dimensions and

■ All models: 3-1/2" (8.9 cm) high x 19" (48.25 cm) wide x 5" (12.7 cm) deep

Weights

■ D20: 5 lbs (11 Kg) , D100 and D300: 6 Ibs (13 Kg)

RJ-11 Jack

■ Talk battery: 24 volts, loop start or ground start, negative voltage ring lead

Specifications

■ Impedence: 600 Ω

Temperature

■ -10 to +40 deg. C. (14°F to 104°F) operational; to +50 deg. C. (122°F) with forced air

Range:

■ -20 to +70 deg. C. (28°F to 158°F) storage and shipment

Humidity Range:

■ 5% to 95% (non-condensing) storage/shipment and operation

Environmental

■ Locate in an area free of excess moisture, corrosive gases, dust, and chemicals.

Requirements
Electrical

■ 100-250 VAC, 50/60 Hz, lamp, 3-prong outlet separate ground

■ Outlet must not be controlled by an on/off switch

■ Grounding:

A. Use the power cord supplied with the unit, or an equivalent cord that meets applicable

safety codes. Do not cut or remove the third wire ground prong.

B. The attachment-plug receptacles in the vicinity of the product or system are all to be of a

grounding type, and the grounding conductors serving these receptacles are to be
connected to earth ground at the service equipment.

1-10 Overview

Hardware Configuration

2

Contents

Power

Circuit Protection
Mounting
Universal Approvals

Controls and Indicators, Terminals and Connectors

Auxiliary Equipment

2-2
2-2
2-2
2-3
2-3
2-5

Hardware Configuration 2-1

Power

The rear panel of the AmpliCenter has a green LED which lights indicating

Power On.

One DC voltage derived from the PagePac Plus D-series AmpliCenter via
the interconnect cable (provided with the Controller) is the source for all
power required by the PagePac Plus Controller and any (optional)
attached Zone Expansion Modules.

Circuit Protection

Complete thermal and short circuit protection with automatic reset.

Mounting

Capable of mounting into a EIA 19" cabinet, free standing rack, or wall
mounting. Refer to Installation section 3.

2-2 Hardware Configuration

Universal Approvals

Domestic and international approvals:

■

■

■

■

UL813
FCC, Part 15, Class A (see Appendix A)
CSA 22.2, No 950
DOC.

Controls and Indicators, Terminals and Connectors

Figure 2-1 shows the controls and indicators, terminals and connectors on

the rear panel of the AmpliCenter. Table 2-1 identifies them by function.

Refer to the PagePac Plus Installation and Use Guide for similar
information for the whole PagePac Plus system.

Figure 2-1. AmpliCenter Controls and Indicators, Terminals and Connectors

Hardware Configuration 2-3

The following items describe all control and indicator functions illustrated in
figure 2-1:

Table 2-1. Controls and Indicators, Terminals and Connectors

1.

2.

3.

4.

5.

6.

7.

8.

9.

AC Power in: 100-250VAC, 50/60 Hz, 1 amp (AmpliCenter is self-switching.)
0dBm out, an auxiliary output that differs from the main 70.7V output in that it is a low level

(0dB), 600 ohm balanced output used for driving a remote or off-premises amplifier
DC Power, and 70V audio out to Controller
Bass control screw-type adjustment pot. Attenuates low frequencies so that horns and small

speakers are not overdriven by excessive bass energy. Cut-off frequency is adjustable from 50
Hz (full CCU) to 400 Hz (full CU)

Music In: left and/or right channels with ground;
Paging In: redundant paging input (ground, C1, tip, and ring)
70V Out: Balanced output used for terminating the loudspeaker wiring

Screw-type pots: VOX sensitivity level, Music ducking (mute level for music during voice
page), Music level for various music sources

LEDs: green - power on, lights when AC line voltage is applied to AmpliCenter
red – overload, lights when the AmpliCenter output exceeds its output power rating.

This can occur when total speaker load is greater than the output rating, or

when speaker wiring is shorted
red - unbalanced output, indicates when one speaker lead is accidentally shorted to ground
green – page accessed, lights when voice paging is active

Telephone system mode switch: dry loop 600 ohms, dry loop Hi Z, ground start, and loop start

From host telephone system or Controller RJ11 connector paging audio and control

2-4 Hardware Configuration

Auxiliary Equipment

Your PagePac Plus AmpliCenter D20, D100, or D300 is compatible with
numerous peripheral products and speakers which can be utilized to meet

your facility requirements

■

■

■

■

■

AT&T PagePac Plus Controller (PEC 5323-100)

AT&T PagePac Plus Zone Expansion Unit (PEC 5335-100)

Speakers

— a

full range of 70V speaker products is available for use
with the PagePac Plus AmpliCenter -- from wall or ceiling mount
speakers to horn-type speakers.

Amplifiers

— Depending on your paging applications, several amplifiers
(auxiliary) are available. These include the PagePac 6 (PEC
5323-006), a 6-watt small amplifier or the PagePac Plus AmpliCenter
D20 (20 watt), D100 (100 watt), or D300 (300 watt) series
AmpliCenters (PEC 5328-020, 5328-100, 5328-300) designed for larger
area paging demands.

Microphone

— The AT&T Microphones are compatible with the

PagePac Plus system, including the AmpIiCenter. Microphones are
available for single-zone paging (PEC 5335-400) and for multi-zone
paging (PEC 5335-405) with the PagePac Plus Controller. Each

microphone provides excellent audio fidelity and has an On/Off contact
closure.

■

■

■

Doorspeaker

— The AT&T Doorspeaker (PEC 5330-230) is compatible

with the PagePac Plus system, including the AmpliCenter. This

indoor/outdoor speaker can be surface or flush-mounted to a wall and

provides a pushbutton for alerting inside personnel that the door needs
attention.

PagePal

— for station or C.O. access.

Ambient level controllers, messaging systems, feedback or speech

processing units, music sources, etc.

Hardware Configuration 2-5

Installing the Hardware

3

Contents

Important Safety Information

■

Additional Safety Instructions for Installation Personnel

Example System Setup

■

AmpliCenter Interface with Controller

■

AmpliCenter without Controller, with Series AmpliCenter(s)

Mounting PagePac Plus AmpliCenter

■ Tools Required

Connecting Speakers
Telephone System Interface
Music Source Interface
System Testing

■ Apply AC Power

■ Audio Paging Zones

3-2
3-2

3-3
3-3

3-3
3-6

3-6
3-8

3-9
3-12
3-13
3-13

3-13

Installing the Hardware 3-1

This section provides complete instructions for mounting the PagePac Plus

AmpliCenter on a wall or in a standard EIA 19" cabinet or equipment rack.
It also illustrates all interface requirements to (optional) PagePac Plus
Controller, telephone systems, music source, speakers, auxiliary
equipment, and any control inputs or outputs.

Important Safety Information

Always follow these basic safety precautions when using the system:

1.

2.

3.

4.

5.

6.

7.

8.

Read and understand all instructions.
Follow all warnings and instructions marked on the product.
DO NOT block or cover the ventilation slots and openings. They

prevent the product from overheating. DO NOT place the product in
a separate enclosure or cabinet, unless proper ventilation is provided.

Never spill liquid on the product or drop objects into the ventilation
slots and openings. Doing so may result in serious damage to the
components.

Repair or service must be performed by a factory authorized repair

facility or AT&T technician.

The product is provided with a UL-CSA approved, 3-wire ground type
plug. This is a safety feature. DO NOT defeat the safety purpose of

the grounding type plug. DO NOT staple or otherwise attach the AC

power supply cord to building surfaces.
DO NOT use the product near water or in a wet or damp place (such

as a wet basement).
DO NOT use extension cords. The product must be installed within 6

feet of a grounded outlet receptacle.

Additional Safety Instructions for Installation Personnel

1.

2.

3.

4.

5.

DO NOT install telephone wiring during a lightning storm.
DO NOT install telephone jacks in a wet location unless the jack is

specifically designed for wet locations.
Never touch uninsulated wires or terminals, unless the line has been

disconnected at the paging or controller interface.
Use caution when installing or modifying paging or control lines.
The PagePac Plus AmpliCenter must be securely wall mounted or

installed in a standard 19" EIA equipment rack or cabinet.

CAUTION:

If any wiring from the paging system leaves the building premises, you must

install AT&T 503A1 IROB projectors.

3-2 Installing the Hardware

Example System Setup

Amplicenter Interface with Controller

A

traditional 70

volt installation

This example illustrated in figure 3-1 gives you a quick overview to the
interconnection between the AmpliCenter and the PagePac Controller.

See the PagePac Plus Controller Installation and Use manual for details
on setting up any of these configurations:

The 70v AmpliCenter Audio Output Is Routed Via The Pagepac Plus

Controller to paging zones.
Make sure that the Controller has its external function mode slide switches

set for proper operation (detailed in the Controller Installation and Use

Guide) and is correctly programmed to configure each paging or control

zone (Refer to the PagePac Plus Controller Programming and Operation

Guide).

Controller System

In this configuration, the Controller sends 0dBm audio to the
AmpliCenter(s). The AmpliCenter’s 70V output then goes directly to the
speakers, without being routed through the Controller’s zone distribution

relays. Each AmpliCenter’s audio will only be sent to a specific selected
zone. Both remote AmpliCenters and amplified speakers can be
controlled in this mode as well as other ancillary equipment requiring an

audio output or a switch closure, or both.

Hybrid System

This method uses a combination of the two above configurations.

AmpliCenter without Controller, with Series AmpliCenter(s)

In this configuration (figure 3-2), the host telephone system connects

directly to the first AmpliCenter unit. No PagePac Plus Controller is

utilized. The first AmpliCenter passes a control signal and paging audio to
the second AmpliCenter in the series. This configuration results in a
one-zone paging set-up, wherein a page is broadcast to all speakers
simultaneously. However, each AmpliCenter may have a different music
source. (Example: rock/pop – production areas, easy listening – hallways;

none – offices.)

Installing the Hardware 3-3

AmpliCenter

MUSIC INPUT

ALL MODULES POWER INPUT
100-250 VAC 50/60 HZ, 1 amp

SET TO
DRY LOOP 600 OHM

PAGE FROM
CONTROLLER

CONTROLLER

NIGHT
BELL

ATTENDANT

ACCESS
INPUT

TELEPHONE
SYSTEM
INTERFACE

RS232-TO PC
(OPTIONAL)

INPUT OR OUTPUT
ZONES: 1-8

POWER AND
AUDIO TO
CONTROLLER

0dBm/MPS
OUTPUT

Figure 3-1. AmpliCenter Interface with PagePac Plus Controller

3-4

Installing the Hardware

FIRST AMPLICENTER

MUSIC
INPUT

TO HOST TEL.
SYSTEM

AC POWER
CONNECTION

(USE EITHER
MOTHOD)

TO HOST TEL.
SYSTEM

PAGING
CONNECTION
NEXT APLICENTER

TO SPEAKER

NEXT AMPLICENTER

MUSIC
INPUT

AC POWER
CONNECTION

TO NEXT
AMPLICENTER

SET TO
DRY LOOP
600 Ω

TO SPEAKERS

Figure 3-2. Series AmpliCenters, without Controller

Installing the Hardware 3-5

Mounting PagePac Plus AmpliCenter

NOTE: Figure 3-3 illustrates a

The AmpliCenter must be securely wall mounted or installed in a standard

wall mounted configuration.
Figure 3-4 illustrates a rack
mounted arrangement.

Tools Required

19" EIA cabinet or free-standing equipment rack (Wall mount wood screws

not provided).

The following tools are required for the installation of the system hardware
and cabling.

■

Phillips screwdriver (for 10-32 screws)

■

Standard blade screwdriver (small, for terminal block connections and

level adjustments)

■ Wire strippers (24 AWG -12 AWG)

■

Telephone test set (optional, for troubleshooting)

■

Tone out circuit tester (optional, for troubleshooting)

■

Portable 70V speaker (use cabling pulled for ceiling speakers)

(optional, for troubleshooting)

■

Volt-Ohm Meter (optional, for troubleshooting)

■

4 wood screws, if mounting on wall

SIDE VIEW

FRONT VIEW

AMPLICENTER

6 FOOT
POWER CABLE

MUSIC INPUT

PAGE INTO
AMPLIFIER

Figure 3-3. Wall Mounted Hardware

3-6 Installing the Hardware

FRONT DETAIL

1.750

TYPICAL

COMBINATION

PAN HEAD

PILOT POINT

# 10-32(TYPICAL)

REAR DETAIL

POWER STRIP

Figure 3-4. Rack Mounted Hardware

Installing the Hardware

3-7

Connecting Speakers

Using common industry standard procedures or accepted practices of

AT&T for telephone equipment, mount speakers and adjust speaker top for

each paging zone and run the appropriate cable for 70 volt speaker

systems. Use class 2 wiring, and comply with any local safety codes.
The speakers are wired to the AmpliCenter using either of two methods

(figure 3-5). Recommended cable size is 24-22 AWG minimum for
20-watts, 18-20 AWG for 100-watts, and 16-18 AWG for 300-watts, with
shielded cable for all speakers with talkback.

Connect speaker wire to 70V output connector on rear of AmpliCenter unit.

NOTE: If paging zones use the

If there are long speaker runs, it is recommended to use a larger gauge

talkback feature, cabling must be

solid wire.

shielded and grounded at the
AmpliCenter connector, not the
speaker.

HOME RUN METHOD

SPEAKERS

TWO
WIRES

AMPLICENTER

TWO
WIRES

66-TYPE

CONNECTION

BLOCK

TWO
WIRES

SPEAKER-TO-SPEAKER METHOD

SPEAKERS

AMPLICENTER

Figure 3-5. Speaker Run Method

3-8 Installing the Hardware

Telephone System Interface

The AmpliCenter, when used without a PagePac Plus Controller, connects
directly to your facility telephone system for paging. Figure

3-6

shows this
interconnection. Be sure the Telephone Mode Switch on the rear of the
AmpliCenter is set to the type of telephone system you have (see next
paragraph).

When used with a PagePac Plus Controller, the AmpliCenter receives its
telephone paging input from the controller. Figure 3-6 illustrates this
interface, as well.

The connection between the AmpliCenter and the page input interface has
four possible modes of operation to accommodate a variety of telephone
systems. They are as follows:

■ Dry loop, 600 ohms

■ Dry loop, Hi Z

■ Ground start

■ Loop start

Telephone Mode
Switch

1.

2.

3.

4.

1234

DL DL GS LS

600 HI-Z

Dry Loop 600 Ohms, used for input from paging port of
PBX or from microphone

Dry Loop Hi Impedance, used to parallel many
AmpliCenter inputs without loading down the source
output.

Ground Start Trunk, for input direct from PBX
Loop Start Trunk, for input direct from PBX

Installing the Hardware 3-9

The

Dry Loop 600 Ohm

is a four wire interface consisting of a dry audio
pair with a 600 ohm impedance and a control pair. The page input is
activated when the control pair receives a contact closure from the host
equipment, connecting C1 to ground. The Dry Loop page input can also be
activated by the presence of page input audio signals that exceed a set

threshold. This threshold is set by the page VOX adjustment; clockwise

rotation lowers the threshold and makes it more sensitive. Adjust by
experimentation to account for various line loss and noise. This feature is
beneficial for (amplified) microphone sources that don’t have a Music/Page
control contact, or for remote AmpliCenters connected by leased pairs so

that another pair is not required for Music/Page switching control.

Dry Loop Hi Impedance

is used to interface with parallel multiple inputs.
Input impedance is 100K ohms. Otherwise, the same as the 600 ohm dry
loop operation.

NOTE: Ground start interface

The

Ground Start

mode is a two wire interface and has a 600 ohm input

requires common ground

impedance. When a trunk is accessed, a momentary ground is sent to the

between paging input and

telephone system by direct line

ring-side of the pair by the host equipment, loop current is detected and

or other common grounding

the tip-side pair is closed. Disconnect supervision of the ground start

methods.

mode is accomplished by monitoring the loop current.
The

Loop Start

mode is two wire interface and has a 600 ohm input
impedance. The host equipment draws loop current from the talk-battery
which is supplied by the AmpliCenter. Disconnect supervision of the loop
start mode is accomplished by monitoring the loop current.

3-10 Installing the Hardware

NOTE:
THESE TERMINALS ARE REDUNDANT
PAGE INPUT CONNECTION. USEFUL
WHEN A MODULAR RJ-11 PLUG AND
CABLE IS NOT SUITABLE.

SET TO
HOST SYSTEM
REQUIREMENTS

TO HOST TELEPHONE
SYSTEM OR PAGING
SYSTEM CONTROLLER

PBX HOST
TELEPHONE
SYSTEM

LOOP START TRUNK PORT
OR DRY LOOPO PAGE PORT

Figure 3-6. AmpliCenter Interconnection to Telephone System or to Controller

Connection to

The page input cord that connects to the PagePac Plus AmpliCenter has a

AmpliCenter

standard 4-wire RJ-11 type plug or leads on the end that connects to the
AmpliCenter. The other end of the cord, depending on the host system,
may have a special 25-pair connector, spade-tip leads, or an RJ-11 type
plug.

The page input cord conductors are usually color-coded and are
connected to the host system as follows.

1. Connect black wire to the paired dry contact control lead ground.

2. Connect yellow wire to the paired dry contact control lead C1.

3. Connect red wire to system ring R.

4. Connect green wire to system tip T.

Installing the Hardware 3-11

Music Source Interface

Music Input

To provide background music for your paging system, a music source can
be connected to your AmpIiCenter at the 10-position connector on the rear.
The audio source can be a CD player, AM, FM, or commercial radio, tape
player, or other audio device. Since most music sources are stereo, left
and right channel inputs are combined in the AmpliCenter. Monophonic
sources can be connected to either left or right input with the other not
connected.

You can adjust the music volume level, ducking level (volume of music
while voice page is active) by means of volume controls on the rear of the
AmpliCenter.

The AmpliCenter unit amplifies and distributes the music signal to the
paging zones.

The PagePac Plus AmpliCenter has a screw strip connector that ties down
the cabling from the music source. Refer to figure 3-7.

SHIELDED

CABLE
OUT TO
SPEAKERS

FROM EXTERNAL
MUSIC SOURCE

Figure 3-7. Music Input Connections

3-12 lnstalling the Hardware

System Testing

With the zone wired and connected to the AmpliCenter, testing may begin.

CAUTION:

Be careful not to short out any audio output contacts during this procedure as the

AmpliCenter may go into overload as indicated by the overload LED. A distorted

or inaudible page will result.

Apply AC Power

Power to the PagePac AmpliCenter is supplied through a single power

cord connected to a grounded outlet. There is no power switch.
Connect the 100-250 VAC modular connector to the back of the

AmpliCenter and then to the outlet socket. Do not defeat the third wire

ground circuit.

Audio Paging Zones

Use the following steps to test audio paging zone output.

1.

2.

3.

4.

5.

6.

Adjust the Low Frequency Cut-Off control. This control attenuates
low frequency bass so that horns and small speakers are not

over-driven and distorted by excessive bass energy. Cut-off
frequency is continuously adjustable from 50Hz (full CCW rotation) to
400 Hz (full CW rotation).

The Page VOX sensitivity is turned fully counter-clockwise if the Dry

Loop feature is not used.

Adjust Music Input level. Clockwise rotation will increase the level.

Listen and set to a comfortable level.

Using a telephone from the host system, dial the paging access code.

Speak into the telephone in a normal manner. Your voice should be

heard from all connected speakers. The AmpliCenter Page Input has

an automatic level control (ALC) which keeps loud talker’s and

normal talker’s output at the same level. Beware of paging from a

telephone directly under a loudspeaker; feedback howl can occur.

(An anti-feedback speech processing unit or a record/playback delay
unit can solve this if it will be a problem for the users.

Re-adjust Music Input level to the desired loudness relative to Paging
loudness.

Some loudspeaker taps may have to be re-adjusted to get even
coverage at all locations. Be sure that final speaker tap setting totals

do not exceed the power rating of the AmpliCenter.

Installing the Hardware 3-13

7.

The Paging output is limited to a nominal 70 Volts rms by the ALC.

In a properly designed system, sound loudness is normally adjusted
by selection of appropriate speakers and their individual tap settings
for a 70 Volt input. However, circumstances such as a long term
change in ambient noise may call for reducing the loudness of all
speakers en-mass. This output level can be attenuated by an overall
AmpliCenter output level control setting. This setting is accomplished
remotely from any host system phone that dials DTMF.

Dial the paging access code.
When you have cut-thru, dial [#] [#] [#] [#] followed by:

DTMF digit

8

7

6
5

4

3
2
1

Output Attenuation

0 dB
–3 dB
–6 dB
–9 dB
–12 dB
–15 dB
–18 dB
–21 dB

NOTES:

When used, the PagePac Plus Controller must be configured to pass DTMF
signals to that zone in order for this to work. Also, MERLIN multi-button sets

require pressing [#]

twice for every # sent; therefore a string of eight [#] s must

be pressed before the level setting digit is registered.

The DTMF tones will be heard from the loudspeakers during this adjustment.

The setting is retained in the Controller memory during power black-outs for 24

hours minimum, 1 week typical.

The maximum AmpliCenter power rating is reduced by the attenuation level; i.e.

total speaker load impedance may not be less than 250 ohms for the D20, 50

ohms for the D100, or 16.7 ohms for the D300.

The 0dBm output is also attenuated proportionally to the 70V output.

8.

Adjust Music Ducking level. This feature allows music to continue to
be heard during a Page, but at a reduced level. The range is from
less than -40dB (full CCW) to -6 dB (full CW).

3-14 Installing the Hardware

Maintenance and Customer Support

4

Contents

In Case of Difficulty
Power Failure Operation
Common Problems
Troubleshooting
Electrical Block Diagram

4-2
4-3
4-3
4-3

4-5

Maintenance and Customer Support

4-1

Your PagePac Plus system is designed to provide trouble-free
performance without any special maintenance procedures. To reduce the

risk of accidental damage:

■

Keep the system modules in an area free of dust, smoke, and

moisture, and do not block their air vents.

■

Keep the rear of the modules neat. Strap down cable runs and avoid

excess loose wires and debris that could cause short circuits.

In Case of Difficulty

If you have a problem with your system, you may be able to solve it

yourself by following the appropriate troubleshooting procedure described
in this section. If you still need help, call the Helpline toll-free number 24
hours a day:

United States:

1-800-628-2888

Canada:

Eastern Canada and Ottawa:

1-800-363-1882

Ontario:

1-800-387-4268

Central and Western Canada:

1-800-663-9817

If you call, have the following information ready so that the representatives

can better help you:

■

The kind of system you have (for example, PagePac Plus with a D-300

AmpliCenter).

■

The kind of host telephone system to which the PagePac Plus is

connected.

■

A history of the problem.

4-2 Maintenance and Customer Support

Power Failure Operation

The PagePac Plus AmpliCenter will operate with the host telephone
system in the event of a power failure if both are connected to an
uninterruptable power supply (UPS). If the host system is Centrex, no
local power is required for the telephone system, though the AmpliCenter
requires AC power.

Common Problems

Some common problems encountered when the paging system is not
operating are described below. Check each item in the order listed.

1. No AC power to AmpliCenter

2. Host telephone system failure

3. Host system page port failure

4. A hardwire disconnect between host system and PagePac Plus

5. AmpliCenter switch settings tampered with
If the problem has not been resolved by checking the preceding items,

follow the steps described in Troubleshooting below.

Troubleshooting

The following table describes various problems that could occur, and

procedures you can follow to try to solve the problem.

Maintenance and Customer Support

4-3

Table 4-1. Troubleshooting

Problem

Corrective Action

Page extension does not
answer

Page extension answers, but
page is not heard

Background music cannot be
heard

Distorted, garbled, or raspy
sound from all speakers
connected to AmpliCenter

Green power LED off

Page access LED won’t go off

No power to AmpliCenter.
Host system not passing call through to AmpliCenter.

Telephone Mode Selection Switch not set correctly for host telephone
system.

Ground start - Tip and Ring reversed.
Audio signal not reaching speakers. Check wiring at controller. Verify

Page Accessed LED is on.
Low volume. Adjust music output levels on AmpliCenter.

Input level not set correctly. Adjust input level on AmpliCenter.
No power to music source. Verify power is on.
Radio off station. Adjust tuner.
Most likely music input wires crossed, with signal grounded out.
Failed AmpliCenter. Return for repair.
Music input level too high. Turn down.
Shorted circuited speaker leads. Separate.

Speaker transformer failed too short. Replace.
AC outlet receptacle is not live.

Power cord is loose.
Failed AmpliCenter. Return unit for repair.
Page VOX too sensitive. Adjust.

C1 lead inadvertently grounded. If loop start or ground start, check that
only 2 wires (Tip and Ring) are connected by the modular plug cord.

4-4

Maintenance and Customer Support

Electrical Block Diagram

This electrical diagram of the AmpIiCenter is silkscreened onto the back of
the unit.

Figure 4-1. AmpliCenter Electrical Block Digram

Maintenance and Customer Support 4-5

FCC Statement and Warranty Information

FCC Statement (Part 15)

Radio Frequency Interference

The PagePac Plus AmpliCenter generates and uses radio frequency

energy and if not installed and used in strict accordance with the
manufacturer’s instructions, may cause interference to radio and television
reception. Testing is being conducted for compliance with the limits for a
Class B device in accordance with the specifications in Subpart J of Part

15 of the FCC Rules and Canadian D.O.C. regulations. This testing is
designed to provide reasonable protection against such interference.
However, there is no guarantee that interference will not occur in a
particular installation If this equipment does cause interference to radio or

television reception, which can be determined by turning the AmpliCenter

unit off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:

■

Reorient the radio or TV receiving antenna.

■

Relocate the AmpliCenter unit with respect to the radio or TV

receiver

or vice-versa.

■

Plug the AmpliCenter unit into a different outlet so that it and the radio

or TV receiver are on different branch circuits.

If necessary, the user should consult the dealer or an experienced

radio/television technician for additional suggestions. The user may find
the following booklet, "How To Identify and Resolve Radio-TV Interference

Problems," helpful. This booklet was prepared by the Federal

Communications Commission (FCC) and is available from the U.S.

Government Printing Office, Washington, DC 20402. Stock order

No. 004-000-00345-4.

FCC Statement and Warranty Information

A-1

Warranty Information
Limited Warranty and Limitation of Liability

AT&T warrants to you that the product will be free from defects in material
and workmanship when title passes to you. If you notify AT&T that the
product has failed to operate as warranted within one year of the date title
passes to you, AT&T will, at its option, repair or replace the component or
components of the product that failed to operate as warranted. Any repair
or replacement components may be new or refurbished and will be
provided on an exchange basis. If AT&T determines that the product
cannot be replaced, AT&T will refund the purchase price to you.

If you purchased the product directly from AT&T, AT&T will perform
warranty repair on your premises in accordance with the terms and
conditions of AT&T’s "Business Day" or "Around-the-Clock" warranty
plans. The details of AT&T’s warranty plans may be obtained from AT&T.
If you purchased the product from an authorized dealer, you will be
covered by AT&T’s authorized dealer warranty plan during the warranty
period. Contact your authorized dealer for details of AT&T’s authorized
dealer warranty plan.

AT&T’s obligation to repair, replace or refund as

set forth above is your exclusive remedy.

The limited warranties provided above do not cover damages, defects,
malfunctions or product failures caused by:

■ Failure to follow AT&T’s installation, operation or maintenance instructions;

■ Unauthorized modification or alteration of the product or its components;

■ Product abuse, misuse or the negligent acts of persons not under the

reasonable control of AT&T;

■ Actions of third parties and acts of God other than power surges (e.g.,

lightning).

This limited warranty applies only to the product purchased directly from
AT&T or purchased directly from an authorized AT&T dealer. This limited
warranty does not apply to products purchased or operated outside the

United States.

You may be required to provide AT&T with proof of purchase before AT&T

will perform any warranty repair or provide any warranty replacements.

A-2

FCC Statement and Warranty Information

EXCEPT AS SPECIFICALLY SET FORTH ABOVE, AT&T, ITS

AFFILIATES, SUPPLIERS AND DEALERS MAKE NO WARRANTIES,

EXPRESS OR IMPLIED, AND SPECIFICALLY DISCLAIM ANY

WARRANTY OF MERCHANTABILITY OR FITNESS FOR A

PARTICULAR PURPOSE.

EXCEPT FOR PERSONAL INJURY, THE LIABILITY OF AT&T, ITS
AFFILIATES, SUPPLIERS AND DEALERS FOR ANY CLAIM, LOSS,
DAMAGE OR EXPENSE FROM ANY CAUSE WHATSOEVER,
REGARDLESS OF THE FORM OF THE ACTION, WHETHER IN
CONTRACT, TORT OR OTHERWISE, SHALL NOT EXCEED THE
LESSER OF DIRECT DAMAGES PROVEN OR THE REPAIR OR
REPLACEMENT COST OF THE SYSTEM OR THE SYSTEM’S
PURCHASE PRICE. IN NO EVENT SHALL AT&T, ITS AFFILIATES,
SUPPLIERS AND DEALERS BE LIABLE FOR INCIDENTAL, RELIANCE,
CONSEQUENTIAL OR ANY OTHER INDIRECT LOSS OR DAMAGE
(INCLUDING LOST PROFITS OR REVENUES SUSTAINED OR
INCURRED IN CONNECTION WITH THE SYSTEM). THIS LIMITATION

OF LIABILITY SHALL SURVIVE FAILURE OF THE EXCLUSIVE

REMEDY SET FORTH IN THE LIMITED WARRANTY ABOVE.

Installation and Maintenance Information

There are several types of installation and maintenance plans available
from AT&T and/or your dealer. Please call your AT&T sales representative
or authorized dealer for details.

For warranty service, contact your AT&T representative or authorized
dealer.

FCC Statement and Warranty Information

A-3

FEEDBACK FORM

System:

PagePac Plus AmpliCenter, Release 1

Document:

Installation and Use Guide, Issue 1 CIC 463-248-202

Note to readers:
We welcome your feedback on this book and the PagePac Plus system. Your suggestions

will help us improve the quality of our reference materials and products. Thank you for taking

the time to give us your comments.

Installation and Use book (when commenting on specific items, please give page numbers):

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B-1

Return to:
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AT&T Rm #2A-25
99 Jefferson Rd.

Parsippany, N.J. 07054

FAX: [phone]

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B-2

Index

A

About this guide
AC power
AmpliCenter

Components
Connection

Electrical block diagram
Example setup
Example system setup

Interface with controller
Mounting
Wall mounted hardware
Without controller

Approvals
Audio paging zones
Auxiliary equipment

C

Capacities
Circuit protection
Comment on this guide
Common problems
Connectivity chart
Connectors
Controller system
Controls
Customer support

ii

D

Dimensions and Weights

E

Environmental requirements

1-2

3-13

1-7

3-11

4-5

3-4 — 3-5

3-3
3-3

1-2, 3-6

3-6
3-3
1-3

3-13

1-5

1-10

1-2
1-6

4-3

1-4
1-3

3-3

1-3

4-1 — 4-5

1-10

1-10

F

FCC

Statement

Features

H

How to use this guide
Hybrid system

I

Indicators
Installation

Hardware

Steps

M

Maintenance
Mounting
Music source interface

N

Notice

O

Ordering information

P

Paging system interface
Power
Power failure operation

Product safety labels

A-1 — A-3

1-9

1-2
3-3

1-3

3-1 — 3-14

1-3

4-1 — 4-5

1-2

3-12

ii, 1-8

3-9
1-2
4-3
1-6

Index IN-1

R

Rack mounted hardware

Diagram
Radio frequency interference
Reference materials

3-7

A-1

1-6

S

Safety information
70 volt installation
Shipping container contents
Speakers
Specifications
Support telephone numbers
System testing

T

Telephone mode switch
Telephone system interface

Temperature range
Terminals
Terminology
Tools required
Trademarks
Troubleshooting

Hotline

W

Warranty

3-2
3-3

1-7

3-8

1-10

ii

3-13

3-9
3-9

1-10

1-3
1-6

3-6

ii
4-3
4-2

A-1 — A-3, ii

IN-2 Index

© 1993 AT&T
All rights reserved
Printed in U.S.A.

AT&T 463-248-202

0II722051-300

Issue 1, March 1993

Graphics © AT&T 1988