AT&T Partner II R3 Installation

518-455-313
July 1992

PARTNER® II
Communications System
Release 3
Installation

AT&T—Proprietary

This book contains proprietary information of

AT&T and is not to be disclosed or used except in

accordance with applicable agreements.

Copyright © 1992 AT&T
All Rights Reserved
Printed in U.S.A.

AT&T 518-455-313
Issue 1

July 1992

Notice

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

Federal Communications Commission (FCC) Interference Notice

This equipment has been tested and found to comply with the limits of a Class A digital device,
pursuant to Part 15 of FCC rules. 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 manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference, in which case
the user will have to correct the interference at his or her own expense. For additional FCC

information, see Appendix C of the PARTNER II Communications System Programming and Use

guide.

Canadian Emissions Requirements

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.

Le present appareil numerique n’emet pas de bruits radioelectriques depassant les limites

applicable aux appareils numeriques de la classe A prescrites dans le Reglement sur le brouillage

radioelectrique edicte par le ministere des Communications du Canada.

Trademarks

MLS-34D, MLS-18D, MLS-12D, MLS-12, MLS-6, Call Assistant, PARTNER MAIL, and SYSTIMAX are

trademarks of AT&T. PARTNER, Magic on Hold, and PagePac are registered trademarks of AT&T.

Warranty

AT&T provides a limited warranty to this product. See Appendix B of the PARTNER II

Communications System Programming and Use guide.

Ordering Information

The order number for this book is 518-455-313. To order additional books, 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, replacement parts, accessories, and other compatible equipment, refer to
“Product Ordering Information” in Appendix B of the PARTNER II Communications System
Programming and Use guide.

Support Telephone Numbers

In the continental U.S., AT&T provides a toll-free customer helpline 24 hours a day. Call
the AT&T Helpline at

Outside the continental U.S., contact your local AT&T Authorized Dealer.

1 800 628-2888

if you need assistance when installing your system.

Installing the Hardware

Contents

Important Safety Instructions

■

Additional Safety Instructions for Installation Personnel

Overview
An Example System Setup
Required Parts
Installation Guidelines

■

Telephones and Devices

■

Combination Extensions

Using a Direct Connection
Using a Bridging Adapter

Installation Procedures

■

Installing the Control Unit and Modules

■

Connecting Lines and Extensions

■

Connecting Caller ID Display Devices

■

Assembling System Phones

Desk Mounting
Wall Mounting

■

Connecting and Testing Telephones

■

Connecting Paging, Music-On-Hold,
and Call Reporting (SMDR) Devices

■

Connecting MLS-CA24 Intercom Autodialers

One Autodialer
Two Autodialers

ii
ii

1

2
4
5

5
6
7
7

8
8

10
12
13
13
14
15

16
17
17
18

Equipment Upgrades

■

Adding New Modules

■

Replacing System Modules

Specifications

19
19

20
22

i

Important Safety Instructions

Always follow these basic safety precautions when using the system:

1.

Read and understand all instructions.

2.

Follow all warnings and instructions marked on the product.
Never spill liquid on the product or drop objects into the ventilation

3.
slots and openings. Doing so may result in serious damage to the
components.

4.

Repair or service must be performed by a qualified repair person.
The product is provided with a three-wire grounding type plug. This is

5.
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

6.
a wet basement).

CAUTION:

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 unless proper ventilation is provided.

Additional Safety Instructions for Installation Personnel

DO NOT install telephone wiring during a lightning storm.

1.
DO NOT install telephone jacks in a wet location unless the jack is

2.
specifically designed for wet locations.

Never touch uninsulated telephone wires or terminals, unless the

3.
telephone line has been disconnected at the network interface.

4.

Use caution when installing or modifying telephone lines.
The system carriers must be securely wall mounted.

5.

CAUTION:

If any wiring from the extension jacks leaves the building premises,

you must install AT&T IROB protectors (see “Requirements for
Out-of-Building Extensions” on page 23).

CAUTION

Use only AT&T-manufactured PARTNER modules in the
PARTNER

II

Communications System.

CAUTION:

Environmental and electrical conditions must meet the specifications
as listed on pages 22 and 23.

SAVE THESE INSTRUCTIONS

ii

Installing the Hardware

Overview

This guide explains how to install the PARTNER®
begins with an example system setup, then shows the components you need to
install the system and gives general guidelines to consider before installation.
Next, it provides step-by-step instructions for connecting and testing the
components for initial installation and upgrades. Finally, it lists important system
specifications. Make sure that your installation meets all electrical and
environmental requirements.

If your company already has modular jacks for all outside lines and extensions,
you may be able to use the existing wiring to install the system hardware and
connect telephones to the system yourself. To have an AT&T service technician
install and customize your system or change existing wiring, call 1 800 247-7000
(in the continental U.S. only) or call your AT&T Authorized Dealer.

After installation, refer to the PARTNER
Programming and Use guide for programming instructions.

II

Communications System

II

Communications System. It

Overview

1

An Example System Setup

The next page shows a control unit with two 206 modules and
three 400 modules, giving the system a capacity of 16 out­side lines and 12 extensions. Although your system may
differ, this example will give you an idea of the types of equip­ment you can connect to it. System phones and standard
devices are connected to ten extensions. The circled
numbers in the figure refer to the following list, which gives a
brief description of the system’s hardware components.

Control Unit

The control unit shows both the primary and the expansion
carriers, including these components:

Backplanes. The backplanes channel power to the
system and connect the system modules.

206 Modules. Each 206 module has jacks for two lines
and six extensions.

400 Modules. Each 400 module provides four more line
jacks but no extensions. Notice that the 400 modules are
installed to the right of the 206 modules.

Grounding Screw. Attaches #12 AWG or #14 AWG
solid copper wire to an approved earth ground.

Primary Processor Module. The primary processor
module contains the software that provides the system’s
features. It also has PAGE, SMDR, and MUSIC ON
HOLD jacks. (See 5 below.)

Expansion Processor Module.

processor module extends the primary processor
module’s software intelligence to the modules in the
expansion carrier.

PAGE. A loudspeaker paging system plugs directly into
this modular jack. The system is compatible with any
AT&T paging system, including the AT&T PagePac6®
shown here.

SMDR. A call reporting (or SMDR—Station Message
Detail Recording) device connects directly to this jack.
AT&T’s Call Accounting Terminal is shown here.

MUSIC ON HOLD. AT&T’s Magic on Hold® is
connected to this jack to provide customized music and
messages for callers on hold. Other types of audio
equipment* (including a CD player, cassette player, or
stereo receiver) can be connected using an audio cord
with an RCA phono plug (not supplied).

Line Jacks. The top two jacks on each 206 module, and
all four jacks on each 400 module, connect to outside
telephone lines.

Extension Jacks. The bottom six jacks on each 206
module connect inside wiring for telephones and other
telecommunications equipment.

Network Interface Jacks. These jacks provide access
to telephone lines from the local telephone company.
Each outside Iine was connected to the system by
plugging one end of the line cord into one of these jacks,
and the other end into a line jack on a 206 or 400 module.

Expansion Cable. The expansion cable connects the
primary processor module to the expansion processor

module.

*If you use equipment that rebroadcasts music or other copy-

righted materials, you may be required to obtain a license from
a third party such as ASCAP or BMI. The Magic on Hold system
does not require such a license.

The expansion

Extensions

Various devices—including system phones and industry­standard devices—can be connected to the modular wall
jacks. The modular wall jacks connect to the extension jacks
in the control unit by way of the building’s inside wiring.

Extension 10: These devices are connected:

■

MLS-34D™ Display Phone.

receptionist on programming extension 10 has an
MLS-34D display phone like the one shown here. The
display shows the time, dialed numbers, the duration
of calls, and programming messages.

An MLS-34D, MLS-18D™, or MLS-12D™ is required
for system programming at extension 10 or 11, or
both. You can use an MLS-18D only if there are no
MLS-34D phones in the system. Similarly, you can
use an MLS-12D only if there are no MLS-34D or
MLS-18D phones in the system.

■

Call Assistant™ Intercom Autodialer. An Intercom
Autodialer is connected to the phone, for dialing
extensions and transferring calls to them with one
touch and for seeing which extensions are busy.

■

Standard Touch-Tone Phone.

failure, the MLS-34D phone on extension 10 will not
work, but the receptionist can use the standard phone
to place and receive calls on line 1.

Extension 11: MLS-34D Display Phone. Another
MLS-34D is connected to programming extension 11.
This means you can program the system from this
extension while the receptionist at extension 10 is free to
handle calls.

Extension 12: MLS-12D Display Phone.

phone can handle 10 outside lines.
Extension 13: Bell. A loud bell is connected directly to

this extension jack. Any line programmed to ring on
extension 13 activates the loud bell—to alert users of an
incoming call in a large area such as a warehouse.

Extension 14: MLS-12™ Phone.

to the MLS-12D phone (see ext. 12), but it has no display.

Extension 15: Doorphone.

the building entrance. When someone at the entrance
presses the button on the doorphone, the designated
extensions in the office ring automatically. (Any number
of extensions can be designated as doorphone alert
extensions.)

Extension 16: Standard Phone.

phone (such as you might have in your home) is
connected directly to the extension jack.

Extension 17: MLC-6 Cordless Phone.

MLC-6 cordless phone is connected to this extension. It
works like the corded MLS-6™ system phone.

Extension 18: Fax Machine and Standard Phone.

fax machine and standard phone share this extension.
This lets you have the use of another phone when the fax
machine is idle. (You can use a system phone at
another extension to monitor fax machine activity—see
“Fax Management Feature” under “Using Fax Machines”
in Chapter 4 of the PARTNER
Programming and Use guide.)

Extension 19: MLS-18D Phone and Answering
Machine.

An MLS-18D phone and an answering

machine are connected to this extension.

Typically, the

During a power

This display

This phone is similar

A doorphone is installed at

A standard touch-tone

An AT&T

A

II

Communications System

2

An Example System Setup

CONTROL
UNIT

Primary Carrier

Expansion Carrier

EXTENSIONS

An Example System Setup 3

Required Parts

You will have up to four types of system component packages; Figure 1 shows
the contents of each package in the area marked by a dashed line. Check your
packages to be sure you have the parts shown here (if not, call for support as
instructed on the inside front cover).

Primary Carrier

Cover

Primary

Processor

Module

AC Power Cord

Expansion Carrier

Cover

Expansion

Processor Module
AC Power

Cord

Figure 1. Required Parts

You will need to obtain four #12 screws of the appropriate type for the wall and
weight of the carrier (a carrier with four 206 modules and a processor module
weighs approximately 27.5 pounds or 12.3 kilograms.) You also need a length
of #12 AWG or #14 AWG solid copper wire (not to exceed 25 feet) for grounding.

Backplane

Backplane

Expansion Cable

MLS-34D

Programming

Overlay

206E/206EC Module

7-foot

206E/206EC

Module

Telephone
Line Cords

MLS-18D/MLS-12D

Programming

Overlay

400E/400EC Module

400E/400EC

Module

Quick Reference

Cards

7-foot

Telephone

Line Cords

4

Required Parts

In addition, if you need modular telephone cords for connecting the extension
jacks on the control unit to the modular connecting blocks for extensions in the
equipment room, short telephone cords for wall mounting MLS-model phones,
or a 355A/355AF adapter and D8W telephone cord for connecting a call
reporting device, order them before installation. Refer to “Product Ordering

Information” in Appendix B of the PARTNER

II

Communications System

Programming and Use guide for ordering instructions.

The 206EC and 400EC modules support the Caller ID feature. These modules
are required to provide Caller ID information on system display phones. You
must subscribe to Caller ID service from your local telephone company (if it is
available), and connect any lines associated with this service to the line jacks on
the 206EC and/or 400EC modules. Hereafter, references to 206 modules
include 206E, 206EC, and all 206 modules used with previous releases of the
product. Similarly, references to 400 modules include 400EC, 400EC, and all 400
modules used with previous releases of the product.

NOTE:

A system display phone—either an MLS-34D, MLS-18D, or MLS-12D—is
required for system programming at extension 10 and/or 11. (Make sure that
the programming phone is as large as the largest phone in the system, because
an MLS-12D or MLS-18D cannot program an MLS-34D. Similarly, an MLS-12D
cannot program an MLS-18D.)

Installation Guidelines

Telephones and Devices

You can connect the following telephones and devices to the system:

■

MLS- and MLC-Model System Phones.

two-pair wiring and are compatible with AT&T 4-pair SYSTIMAX™ wiring.

System phones require at least

■

Call Assistant Intercom Autodialers with Busy Indication
(MLS-CA24).

You can connect up to two Intercom Autodialers to the
system phone at extensions 10 and 11 (maximum four per system). The
Intercom Autodialer has its own power supply, which must be plugged
into an AC outlet.

■

Industry-Standard Devices.

Industry-standard devices (including
standard phones) require one-pair mounting cords; AT&T D2R mounting
cords are recommended.

–

Standard Phones.

Connect standard touch-tone or rotary dial

phones to the system for:

–

Power Failure Operation.

During a power failure, system phones
will not work because they require power to operate. However, if
you connect standard phones to extensions 10, 16, 22, 28, 34,
40, 46, and 52, users can place and answer outside calls on lines
1, 3, 5, 7, 9, 11, 13, and 15, respectively. You can connect a
standard phone either alone or combined with a system phone. (If
you combine a standard phone and a system phone on one
extension, you may want to turn off the standard phone’s ringer
during normal use.)

–

Hotlines.

A hotline extension should have a standard phone,
rather than a system phone, but can ring any type of phone. A
hotline phone can also be set up to ring the paging system, so
announcements can be made over the loudspeaker. Do not
connect a Hotline phone to extension 10, 16, 22, 28, 34, 40, 46, or
52, to keep them available for power failure use.

Installation Guidelines

5

Auxiliary Equipment.

–

machines, modems, and answering machines to work with the system.
To connect a telephone and a standard device on the same
extension, see “Combination Extensions” below.

■

Doorphones.

not connect doorphones to extension 10, 11, 16, 17, 22, 23, 28, 29, 34,
35, 40, 41, 46, 47, 52, or 53.

■

PARTNER MAIL™.

connects to two extension jacks and supports up to 20 subscribers, or a
4-port system, which connects to four extension jacks and supports up to
40 subscribers. Do not connect PARTNER MAIL to extension 10, 16, 22,
28, 34, 40, 46, or 52, to keep them available for power failure use.

■

Call Reporting Devices.

accounting device, such as AT&T’s Call Accounting Terminal, to the
SMDR jack on the primary processor module for recording and/or
analyzing call activity.

■

In-Range Out-of-Building Protectors.

building from the control unit requires AT&T In-Range Out-of-Building
(IROB) protectors, to prevent damage due to lightning. (IROBS must be
installed by a qualified technician.)

Combination Extensions

There are a variety of ways to set up fax

You can connect up to two doorphones to the system. Do

You can connect either a 2-port system, which

You can connect either a serial printer or a call

Installing phones in a different

You can connect a standard device (such as a standard phone or an answering

machine) on an extension by itself, or so that it shares an extension with another
piece of equipment (either another standard device or a system phone). An

extension with two devices connected to it is called a combination extension.

You cannot install two system phones on the same extension, and the combined

REN (Ringer Equivalence Number) of two devices on one extension cannot
exceed 2.0. (The REN for a system phone is 0.0.)

If your system phone has a built-in auxiliary jack, you can connect a standard
device directly to the phone, without using a bridging adapter—see “Using a
Direct Connection” on the next page. If your system phone does not provide a

built-in auxiliary jack or if you want to connect two standard devices together,
you must use an AT&T 267F2 bridging adapter—see “Using a Bridging
Adapter” on the next page.

NOTE:

The Call Assistant Intercom Autodialer is not regarded as a standard device.
This means you can connect a standard device to a system phone that also has
one or two autodialers installed.

6

Installation Guidelines

Using a Direct Connection

Figure 2 shows how to connect a standard device directly to a system phone,
using the phone’s built-in auxiliary jack.

To Wall

Jack

Figure 2. Combination Extension Using Direct Connection

Using a Bridging Adapter

Figure 3 shows how to connect a system phone and a standard device or two
standard devices together using the 267F2 bridging adapter.

Standard Device Only

Plug LINE into
gray jack

Plug AUX device
into white jack

To Standard
Device

AT&T

267F2

Adapter

System Phone or Standard Device

Wall Jack

Figure 3. Combination Extension Using Bridging Adapter

Installation Guidelines

7

Installation Procedures

Before installing the system, be sure you read the safety
instructions on page ii.

WARNING:

There are no customer-serviceable components
inside the system modules or backplane. There are
hazardous voltages within that can cause severe or
fatal personal injury. DO NOT OPEN THE MODULES.

Installing the Control Unit and Modules

Install the control unit’s backplane within five feet (1.5

meters) of a properly grounded AC electrical outlet (not

controlled by a switch) and the network interface jacks.
In addition, when you mount the backplane on the wall,
leave at least six inches (2.34 cm) of clearance at the top
and sides, and two feet (0.6 meters) at the front and
bottom to ensure proper ventilation.

A)

1

Hold the backplane against the wall. (If you are
also installing the expansion carrier, plan to
install it to the right of the primary carrier,
leaving 6" to 24" between the carriers.)

B)

Using the four screw keyholes in the backplane
as a template, mark screw locations on the
wall.

Backplane

2

C)

Start four #12 screws, leaving the screw heads
approximately 1/4" away from the wall.

D)

Slip the backplane onto the screws, then tighten
them.

E)

If you are mounting the expansion carrier, repeat
this step.

A)

Slide the primary processor module into the center
slot of the primary carrier—holding down the
locking tab on the bottom of the slot as you
push in the module will make insertion easier.

B)

Push slowly but firmly until the module locks into
place with two snaps, and is attached to the
rear of the backplane and held in place by the
locking tab. Do not force the module. If it
does not insert easily, remove the module,
clear any obstruction, and reinsert it.

if you have an expansion carrier, slide the

C)

expansion processor module into its center
slot until the module locks into place.

Locking

Tab

Installation Procedures

8

3

A)

Slide the first 206 module into the leftmost slot of
the primary carrier. (The system will not work
if a 206 module is not installed in this slot.)

Remember, you must install 206EC and/or
400EC modules for any lines with Caller ID
service.

B)

Going from left to right, install 206 modules first,
then any 400 (or 200) modules. The 400
modules should always be to the right of all
206 modules, so the extensions will be
numbered consecutively. Hold down the
locking tab and align the dovetail guides on
the sides of the module with the guides on any
previously inserted modules. Do not force the
module. If it does not insert easily, remove the
module, clear any obstruction, and reinsert it.

Dovetail

Guides

Primary
Processor
Module

4

5

A)

If you have installed both carriers, plug the ends of
the expansion cable into the two processor
modules and tighten the screws.

Route both ends of the cable through the hooks

B)

on the fronts of the modules. The colored
plastic filters on the expansion cable should
rest just below the hooks.

A)

To power down the system, pull out the main
circuit breakers on both carriers.

On a PARTNER

II

220V system, move the

on/off switch to the “off” position (“O”).
Attach one end of a #12 AWG or #14 AWG solid

B)

copper wire to the ground screw on the
primary processor module. Note that the

length of the wire must not exceed 25 feet.
Route the wire through the hook on the front of

C)

the module, then push it through the space
below the module and out through the back.

D)

Attach the other end of the wire to an approved
earth ground, such as building steel or a cold
water pipe.

Expansion
Processor
Module

Main Circuit Breaker

Power

Jack

Ground

Screw

6

A)

Press the AC power cord firmly into the power jack
on the top right side of the primary carrier’s
backplane until it locks into place.

Plug the other end of the power cord into a

B)

properly grounded three-prong wall outlet not
controlled by a switch.

C)

Repeat Steps 6A and 6B for the expansion
carrier, plugging its cord into the same wall
outlet as the primary carrier’s cord.

Installation Procedures 9

To power up the control unit, push in the main

D)

circuit breaker on the expansion carrier first,
and then push in the main circuit breaker on

the primary carrier.
On a PARTNER

on/off switch to the “on” position (“l”).

Check all green lights on the fronts of the modules.

7

If all lights are lit, you can go to the next section;
otherwise:

A)

If a single light is out, power down the control
unit, reseat the module, then power up the
control unit.

If multiple lights are out, power down the
control unit, reseat the leftmost module that
has a light out, then power up the control unit.

B)

If the lights are still out, call for support as
instructed on the inside front cover.

II

220V system, move the

Lights

555-1343
555-1344

Connecting Lines and Extensions

If extensions are not wired to any modular jacks, call a

qualified service technician.

A)

1

2

Test for dial tone at the network interface jacks
before connecting outside lines to the control
unit. For the test, connect a standard phone
to the first network interface jack.

B)

Lift the handset and listen for dial tone. (If there
is no dial tone, contact your local telephone
company before continuing.)

C)

Repeat for each network interface jack.

A)

Connect line cords to the line jacks on 206 and
400 modules, starting with the top line jack on
the leftmost 206 module.

B)

Route each cord through the hook on the front of
the module, then push the cords through the
space below the module and out through the
back.

C)

Pull the cords from behind the backplane,
leaving at least two feet of slack in the cords
(for future maintenance, so you can easily
reconnect cords after replacing system
modules).

Network

Interface

Jacks

555-1345
555-1346

3

Connect the free end of each line cord to the
appropriate network interface jack.

10

Installation Procedures

4

5

A)

Test the lines—plug a system phone into extension
jack 10. Press the line buttons for each
outside line and listen for dial tone.

B)

Repeat for extensions 16, 22, 28, 34, 40, and 52
(if available).

A)

Connect modular telephone cords to 206 module
extension jacks, starting at the top extension

jack on the leftmost module.
Route each cord through the hook on the front of

B)

the module, then push the cords through the
space below the module and out through the
back.

Pull the cords from behind the backplane,

C)

leaving at least two feet of slack in the cords
(for future maintenance, so you can easily
reconnect cords after replacing system

modules).

D)

Connect the free end of each modular telephone
cord to the modular connecting blocks for
system extensions.

6

A)

Place the cover on the control unit—this is
especially important to keep the modules
dust-free and the system working efficiently.
To cover the control unit, while holding the
cover at an angle, gently move the top rear
edge of the cover over the top of the control
unit.

B)

Match up the grooves where the top edge of the
cover meets the backplane, and gently push

the edge into place.

C)

Lower the bottom of the cover until it is secured
in place.

Installation Procedures

11

Connecting Caller ID Display Devices

The system provides multi-line Caller ID on system
display phones without having to install additional
devices. (See “Caller ID” in Chapter 5 of the PARTNER

II

Communications System Programming and Use guide
for more information.) However, if you want to display or
process Caller ID information for other applications—for
example, on a PC that displays call records—you must
connect the devices as described here. First, you must
subscribe to Caller ID service from your local phone
company, and then connect the Caller ID display device
directly to the line that supports Caller ID at the network
interface jack. Additionally, you must provide a separate
wiring run for the device to the appropriate location. To
process Caller ID information for multiple lines, you must
provide a separate device and a separate wiring run for
each line. To have additional wiring runs installed, call a
qualified service technician.

1

Insert an AT&T 267F2 bridging adapter into the

network interface jack associated with the line that

has Caller ID service.

2

3

A)

Plug one end of a line cord into a jack in the
bridging adapter.

Plug the free end of the line cord into the

B)

appropriate line jack in the control unit.
Route the cord as you did for other line and

C)

extension cords.
Plug one end of a second line cord into the other

A)

jack in the bridging adapter.
Plug the free end of the cord into the appropriate

B)

modular connecting block in the equipment
room.

Plug the Caller ID display device into the

C)

additional modular jack provided at the
appropriate location.

Place the Caller ID display device next to a

D)

phone.
Make sure the Caller ID line is assigned to the

E)

extension where the Caller ID display device
is located. Refer to “Line Assignment” in
Chapter 5 of the PARTNER

Communications System Programming and
Use guide for programming instructions.

II

Phone

Network

Interface

Jacks

PC

Installation Procedures

12

Assembling System Phones

You can either desk mount or wall mount a system
phone. If the system phone is manufactured with a
separate stand, you can use the stand to either wall
mount the phone or raise the angle of the phone when
desk mounting. (The stand is required for MLS-34D
phones.) Alternatively, some system phones—such as
the MLS-18D—are manufactured with a fixed stand. Any
instructions below for installing the stand do not apply to
this type of phone. (Note that wall mounting is not
recommended for display phones.)

Desk Mounting

A)

1

Plug one end of the handset cord into the jack on
the handset and the other end into the small
jack on the left side of the base. For an
MLS-34D phone, go directly to Step 2.

B)

Plug one end of the phone cord into the jack on
the bottom of the phone. If the phone has
multiple jacks, plug the cord into the GRAY
jack.

Push the cord into place along the channel on

C)

the bottom of the phone.
If you want to raise the angle of the phone, go to

D)

Step 2; if not—or if you have a phone with a
fixed stand—go to Step 3.

2

3

A)

To install the telephone stand (required for the
MLS-34D), gently place the phone upside
down, with the low end of the phone to your
right.

B)

Insert the tab on the narrow end of the stand into
the right slot on the bottom of the phone. (For
an MLS-34D phone, feed the cord through the
hole in the center of the stand and plug it in.)

Insert the other tab into the left slot, pushing the

C)

stand down and slightly inward until the tab

locks into place.
Turn the phone over so it is right side up.

A)

Remove the plastic cover from the phone. Label

B)

the button sheet to show any programmed

lines or button features, then place it on the

phone so the holes on the sheet fit over the

buttons. Carefully replace the plastic cover.
Slide the Quick Reference card under the

C)

telephone.

Installation Procedures

13

Wall Mounting

If you wall mount a display phone, the display may not
be as easy to read, so desk mounting is recommended.
(Wall mounting instructions apply to corded MLS-model
phones only. To wall mount an MLC-6 cordless phone,
follow the instructions in the booklet provided with the
phone.)

Wall Mounting Phones with Separate Stands

1
2

Reverse the plastic hook that sits in the earpiece

part of the handset cradle.
A)

To install the telephone stand, gently place the
phone upside down with the low end of the
phone to your right.

Insert the tab on the narrow end of the stand into

B)

the left slot on the base of the phone. (For an
MLS-34D phone, feed the cord through the
hole in the center of the stand and plug it in.)

Insert the other tab into the right slot, pushing

C)

the stand down and slightly inward until the
tab locks into place.

3

Insert the phone cord through the center of the

A)

stand and plug it into the jack on the base of
the phone, then plug the other end into the
modular wall jack.

Mount the phone on the wall plate using the

B)

screw keyholes on the base of the stand. For
proper mounting, the wall plate must be an

AT&T 630B connecting block.

C)

Connect the handset cord as described in “Desk
Mounting” Step 1A, and label the button sheet
as in Steps 3A and 3B.

Wall Mounting Phones with Fixed Stands

Make sure the telephone cord is unplugged from the
bottom of the phone before proceeding.

1 A)

Reverse the plastic hook that sits in the earpiece
part of the handset cradle.

B)

Gently place the phone upside down.

Installation Procedures

14

2

A)

Unscrew the phone’s four mounting screws and lift
the base of the phone off the top.

CAUTION:

Do not touch electrical circuitry. To do so

will expose you to a risk of electrical shock

and possibly damage the equipment.

Turn the base of the phone upside down so that

B)

the phone base can be mounted parallel to
the wall—and then place it back on the base.

Replace the four mounting screws.

C)

Gray Jack
White Jack

Mounting
Screws

3

Insert the phone cord through the center of the

A)

stand and plug it into the WHITE jack on the
bottom of the phone. Plug the other end into
the modular wall jack.

Mount the phone on the wall plate using the

B)

screw keyholes on the base of the stand. For
proper mounting, the wall plate must be an
AT&T 630B connecting block.

Connect the handset cord as described in “Desk

C)

Mounting” Step 1A, and label the button sheet
as in Steps 3A and 3B.

Connecting and Testing Telephones

1

To connect a phone, plug the modular telephone
mounting cord into a modular wall jack or directly into a
206 module extension jack. (If you are connecting a
standard phone and its mounting cord is loose, use an
AT&T D2R mounting cord instead.)

To install two phones (or other devices) on a single
extension jack, see “Combination Extensions” earlier in
this guide.

2

A)

Test the telephone for proper operation—to test
the power and lights on a system phone,
press and hold the

B)

Before releasing the
All lights should light, the ringer should sound,
and (on the MLS-34D, MLS-18D, or MLS-12D
phones only) a test pattern should appear on
the display. (If not, call for support as
instructed on the inside front cover.)

Replace the handset; the phone is now in normal

C)

operating mode.

 # 

button for five seconds.

 # 

button, lift the handset.

Installation Procedures

15

Connecting Paging, Music-On-Hold, and Call Reporting (SMDR) Devices

Only steps for connection to the processor module are
provided here. Refer to Chapter 4 of the PARTNER
Communications System Programming and Use guide
and the manufacturer’s instructions for additional
information on installing, programming, and using these
devices.

Paging System

II

PAGE Jack

1
2

insert the modular plug into the PAGE jack on the

primary processor module.
Route the cord as you did for line and extension

cords, then connect it to the paging system.

Music-on-Hold Audio Source

If you use equipment that rebroadcasts music or other
copyrighted materials, you may be required to obtain a
license from a third party such as ASCAP or BMI. Or you
can purchase a Magic On Hold system from AT&T,
which does not require you to obtain such a license.

1

A)

Insert an RCA phono plug into the MUSIC ON

HOLD jack on the primary processor module.

B)

Route the cord as you did for line and extension
cords, then connect it to the audio source.

A)

2

First set the unit’s volume to the lowest setting.

Use a flathead screwdriver to turn the volume
control on the processor module
counterclockwise until it stops.

Place a call on hold and listen while adjusting

B)

the volume, clockwise. If you do not hear
music at any setting, check “Music On Hold

(#602)” in Chapter 5 of the PARTNER

Communications System Programming and
Use guide.

Call Reporting (SMDR) Printer

Paging System

(optional)

Volume Control
MUSIC ON HOLD

Jack

Audio Source

(optional)

II

SMDR Jack

1

Insert one end of a D8W modular cord into the SMDR
jack on the primary processor module.

2

Plug the other end into an AT&T 355A adapter, then
plug the 355A adapter into the RS-232C serial port
on the printer.

16 Installation Procedures

AT&T
Call Accounting
Terminal Printer

(optional)

Connecting MLS-CA24 Intercom Autodialers

Since the autodialer has a fixed stand, you may need to
adjust the height of the system phone—by installing a
stand—to match the height of the autodialer. Refer to
Step 2 of “Desk Mounting” under “Assembling System
Phones” for instructions.

You can wall mount an Intercom Autodialer to work next
to a wall-mounted system phone; however, wall-mounting
system display phones is not recommended. The
following instructions are for desk mounting.

One Autodialer

A)

1

Unplug the phone’s modular telephone cord from
the jack on the bottom of the phone and the
wall jack, and save the cord for Step 1D.

Plug one end of the D8W cord supplied with the

B)

autodialer into the jack on the bottom of the
phone. (If the phone has multiple jacks, plug
the cord into the GRAY jack.)

Route the other end through the groove at the

C)

back of the autodialer and plug it into the OUT

jack.

D)

Route one end of the modular telephone cord
through the groove at the back of the
autodialer and plug it into the IN jack; plug the
other end into the wall jack for extension 10 or

11.

Wall Jack

In

Power
Unit

Out
Power

2

A)

Connect the keyed power cord supplied with the
autodialer to the POWER jack on the bottom
of the autodialer, routing it through the groove
as you did in Step 1.

B)

If the keyed power cord is not attached to the
power supply unit, plug the free end of the
cord into the modular jack on the power
supply unit; otherwise, go to Step 2C.

Plug the power unit into an electrical outlet.

C)

CAUTION:

Use only the power unit supplied by AT&T
with the MLS-CA24 Intercom Autodialer.

Installation Procedures 17

A)

3

B)

Two Autodialers

A)

1

B)

C)

2

A)

B)

Arrange the autodialer on your desk next to the
phone.

Remove the plastic cover from the autodialer
and label the button sheet with employee

names. Place the button sheet back on the
autodialer, then carefully replace the plastic
cover.

Unplug the phone’s modular telephone cord from
the jack on the bottom of the phone and the
wall jack, and save the cord for Step 2B.

Plug one end of the D8W cord supplied with the
autodialer into the jack on the bottom of the
phone. (lf the phone has multiple jacks, plug
the cord into the GRAY jack.)

Route the other end through the groove at the
back of the autodialer and plug it into the OUT
jack.

Using the second D8W cord, connect the two
autodialers together: plug one end of the
cord into the IN jack on the first autodialer,
and plug the other end into the OUT jack on
the second autodialer.

Using the modular telephone cord from Step 1A,
route one end through the groove at the back
of the second autodialer and plug it into the IN
jack; plug the other end into the wall jack for
extension 10 or 11.

To phone

In

Power

Unit

Out
Power

Wall
Jack

Power

Unit

3

A)

Connect the keyed power cord supplied with the
autodialer to the POWER jack on the bottom
of the autodialer, routing it through the groove
as you did in Step 1.

B)

If the keyed power cord is not attached to the
power supply unit, plug the free end of the

cord into the modular jack on the power
supply unit; otherwise, go to Step 3C.

Plug each power unit into a separate electrical

C)

outlet (or both into a power strip).

A)

4

18 Installation Procedures

Arrange the autodialer on your desk next to the
phone.

B)

Remove the plastic cover from the autodialer
and label the button sheet with employee
names. Place the button sheet back on the
autodialer, then carefully replace the plastic
cover.

Equipment Upgrades

Adding New Modules

1

A)

To power down the control unit, pull out the
main circuit breakers on both carriers.

On a PARTNER
on/off switch to the “off” position (“O”).

B)

To remove the cover, place one hand on the
handle on the bottom front of the cover and

place your other hand on the top of the cover.

C)

Gently pull the cover up from the bottom and tilt
towards the top until it detaches from the
backplane—be careful not to break the tabs
that attach the cover to the backplane.

A)

2

Before you insert the new module, make sure that
all 400 (or 200) modules are installed to the

right of all 206 modules. Also, remember to
hold down the locking tab and to align the

dovetail guides on the sides of the modules
as you insert the new module.

B

Push the module slowly but firmly until it locks
into place with two snaps, and is attached to
the rear of the backplane and held in place by
the locking tab on the bottom of the slot. Do
not force the module. If it does not insert
easily, remove the module, clear any
obstruction, and reinsert it.

II

220V system, move the

Handle

Power

Dovetail

Guides

Locking

Tab

Jack

3

A

See “Connecting Lines and Extensions” for
instructions on connecting line and/or
extension jack cords to the new module.

B)

To power up the control unit, push in the main
circuit breakers.

On a PARTNER
on/off switch to the “on” position (“l”).

Check all green lights on the fronts of the modules. If

4

all the lights are lit, installation is complete; otherwise:
A)

If a single light is out, power down the control
unit, reseat the module, then power up the
control unit.

If multiple lights are out, power down the
control unit, reseat the leftmost module that
has a light out, then power up the control unit.

B)

If the lights are still out, call for support as
instructed on the inside front cover.

II

220V system, move the

Lights

Equipment Upgrades

19

A)

5

To replace the cover, while holding the cover
at an angle, gently move the top rear edge of
the cover over the top of the control unit and
match up the grooves where the top edge of
the cover meets the backplane. Gently push
the edge into place.

B)

Lower the bottom of the cover until it is
secured in place.

Replacing System Modules

A)

1

To power down the control unit, pull out the
main circuit breakers on both carriers.

On a PARTNER
on/off switch to the “off” position (“O”).

B)

To remove the cover, place one hand on the
handle on the bottom front of the cover and
place your other hand on the top of the cover.

Gently pull the cover up from the bottom and tilt

C)

it towards the top until it detaches from the
backplane.

II

220V system, move the

Handle

Power

Jack

2

A)

Check the slack in the wires. If there is not
enough slack to remove the module without
pulling the line and extension cords free,
label and disconnect the wires before
continuing with Step 2B.

B)

Place one hand on top of the module. With
your other hand, grip the plastic bracket on
the bottom front of the module, and use your
middle finger to hold down the locking tab just
below the bracket. Pull out the old module.

C)

To insert the replacement, hold down the
locking tab and align the dovetail guides on
the sides of the modules. Push slowly but
firmly until the module locks into place with
two snaps, and is attached to the rear of the
backplane and held in place by the locking
tab. Do not force the module. If it does not
insert easily, remove the module, clear any
obstruction, and reinsert it.

Locking

Tab

20 Equipment Upgrades

3

A)

Connect the line and extension cords one at a time,
making sure to place the correct cords into
their corresponding jacks on the new module.

B)

To power up the control unit, push in the main
circuit breakers.

On a PARTNER

on/off switch to the “on” position (“l”).

Check all green lights on the fronts of the modules. If

4

all the lights are lit, installation is complete; otherwise:

A)

If a single light is out, power down the control

unit, reseat the module, then power up the

control unit.

If multiple lights are out, power down the
control unit, reseat the leftmost module that
has a light out, then power up the control unit.

B)

If the lights are still out, call for support as
instructed on the inside front cover.

A)

5

To replace the cover, while holding the cover at
an angle, gently move the top rear edge of
the cover over the top of the control unit and
match up the grooves where the top edge of
the cover meets the backplane. Gently push

the edge into place.

B)

Lower the bottom of the cover until it is secured
in place.

II

220V system, move the

Lights

Equipment Upgrades

21

Specifications

Capacities

Dimensions
and Weights
(approx.)

System

■

24 outside lines via line jacks on
four 206 plus four 400 modules

■

48 extensions via extension jacks
on eight 206 modules

■

1 loudspeaker paging system
via PAGE jack on processor

206E/206EC Module

■

2 outside lines

■

6 extensions

400E/400EC Module

4 outside lines

Extension Jack

■

■

module

■

1 audio source via MUSIC ON
HOLD jack on processor module
(RCA phono plug required)

■

1 call reporting device via SMDR

For programming, a system display
phone must be connected to
extension 10 or 11.

jack on processor module (355A/F
adapter required)

■

2 doorphones, using 2 extension
jacks

■

Primary Proc. Mod. 11"(D) x 17"(H) x 1.5"(W) or 27.9 x 43.2 x 3.8 cm

■

Exp. Proc. Module

■

206E/206EC module

■

400E/400EC module 11"(D) x 17"(H) x 1.5"(W) or 27.9 x 43.2 x 3.8 cm

■

Backplane & cover 12"(D) x 19"(H) x 11"(W) or 30.5 x 48.3 x 27.9 cm

■

MLS-34D phone

■

MLS-18D phone

■

MLS-12D phone

■

MLS-12 phone

■

MLS-6 phone

■

MLC-6 phone

■

MLS-CA24 Autodialer

11"(D) x 17"(H) x 1.5"(W) or 27.9 x 43.2 x 3.8 cm
11"(D) x 17"(H) x 1.5"(W) or 27.9 x 43.2 x 3.8 cm

9.7"(D) x 5.3"(H) x 10"(W) or 24.6 x 13.5 x 25.4 cm

9.5"(D) x 5"(H) x 6.75"(W) or 24.1 x 12.7 x 17.1 cm

9.5"(D) x 5"(H) x 6.75"(W) or 24.1 x 12.7 x 17.1 cm

9.5"(D) x 5"(H) x 6.75"(W) or 24.1 x 12.7 x 17.1 cm

9.5"(D) x 5"(H) x 6.75"(W) or 24.1 x 12.7 x 17.1 cm

9.4"(D) x 3.4"(H) x 7"(W) or 23.9 x 8.6 x 17.8 cm

9.7"(D) x 5.3"(H) x 3.4"(W) or 24.6 x 13.5 x 8.6 cm

Maximum 2 devices per extension
jack, total REN on jack not to
exceed 2.0* ( System phone REN
is 0.0 (zero))

No more than one system phone
per jack

4.0 lbs or 1.8 kgs

4.0 lbs or 1.8 kgs

4.5 lbs or 2.0 kgs

4.0 lbs or 1.8 kgs

5.5 lbs or 2.5 kgs

3.1 lbs or 1.4 kgs

2.8 lbs or 1.3 kgs

2.8 lbs or 1.3 kgs

2.7 lbs or 1.2 kgs

2.7 lbs or 1.2 kgs

2.8 lbs or 1.3 kgs

1.3 lbs or 0.6 kgs

■

Switch Fabric
Electrical

Specifications

Full digital, nonblocking

■

10 Watts (35 BTU/hour) per 400 module, normal and maximum power consumption

■

65 Watts (225 BTU/hour) per 206 module during normal operation

■

100 Watts (350 BTU/hour) per 206 module during maximum power consumption

■

8 Amps maximum current at full system capacity (two carriers with processor module and four 206
modules each)

On a PARTNER II 220V System: 2.2 Amps maximum current

■

4-day memory backup (96 hours)

Primary
Processor

■

68000 microprocessor, 256Kbytes RAM, 512Kbytes ROM

Module
Specifications

Expansion

Processor

■

8051 microprocessor, 12 mHz, 8Kbytes ROM

Module
Specifications

*

The two devices combined on an extension jack can be a system phone with a standard device, or two standard devices; DO NOT

connect two system phones to the same extension jack. If a device lists two RENs, use the higher number when adding up RENs.

22 Specifications

Extension Jack
Specifications

■

Ringing voltage: +5VDC, -140 VDC peak to peak; trapezoidal wave shaping
On a PARTNER

■

35- to 38-Volt talk battery

■

Ringing frequency: 20 Hz

II

220V System: +5VDC, -150 VDC peak to peak

PAGE Jack
Specifications

SMDR Output
Format

Environmental
Requirements—
Control Unit

Electrical
Requirements

■

Draws current on inner wire pair

■

Provides contact closure on outer wire pair

■

600 Ohm impedance

■

1200 baud

■

No parity

■

8 data bits

■

2 stop bits

■

Mount on a wall at least 2 feet (0.6 meters) from the floor (wall mounting required)

■

Locate within 5 feet (1.5 meters) of the network interface jacks and a properly grounded
electrical outlet not controlled by a switch, using supplied 7-foot (2.1-meter) cords

■

Mount the Expansion Carrier at least 6” and not more than 24” away from the Primary Carrier

■

Operating temperature 32° to + 104°F (0° to +40°C), not in direct sunlight

■

Humidity 15%–90%, noncondensing
For proper ventilation and easy replacement of modules, provide at least 6” (2.34 cm) clearance

■

at the top and sides and 2 feet (0.6 meters) at the front and bottom of the control unit.

■

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

■

90–130 VAC, 50–60 Hz, 3-prong outlet separate ground, separately fused at 15 Amps
On a PARTNER

■

Outlet must not be controlled by an on/off switch
Grounding to comply with Underwriters Laboratories (UL) 1459:

■

An insulated grounding conductor (solid copper wire) that is not smaller in size and equivalent

A.

II

220V System: 180–264 VAC, fused at 10 Amps

in insulation material and thickness to the grounded and ungrounded branch circuit supply
conductors, except that it is green with or without one or more yellow stripes, is to be installed
as part of the circuit that supplies the product or system.

B.

The grounding conductor mentioned in item A is to be connected to ground at the service
equipment.

C.

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.

Requirements for
Out-of-Building

Extensions

Wiring

Installation of a telephone or other standard (tip/ring) device in another building requires the
following In-Range Out-of-Building (IROB) protectors to protect the control unit and device from
electrical surges:

■

System phone: two AT&T IROB protectors

■

Standard device: one AT&T IROB protector plus one carbon block protector

■

System phones: AT&T SYSTIMAX™ or at least 2-pair (4-wire) star (“home run” not “loop”)

■

Other standard telecommunications equipment (single-line phones, fax machines, answering
machines, etc.): 1-pair (2-wire) mounting cords (AT&T D2R mounting cords recommended)

■

Bridging adapter: AT&T 267F2

■

Range: 1,000 feet (305 meters) for system phones; 3,000 feet (915 meters) for standard devices

Specifications

23

Safety ■
Requirements ■
Government

Approvals and
Local Phone

Company

Information

US: Meets UL 1459 Issue 2
Canada: Meets CSA C22.2, 225

■

US:

■

Canada: DOC CP01, Issue 7

FCC Part 68
FCC registration number (U.S.): AS5 USA-61630-KF-E
FCC Part 15 Class A
REN (outside line jack): 0.9A per line jack
Jack type: RJ11C
Loop start lines

DOC registration number (Canada): 230 3756A
DOC CS03, Issues 6 & 7
Load Number = 7
Loop start lines

Specifications

24