AT&T 8400 Series Guide

The 8400-Series Voice Terminals
Instructions for Installation,
Switch Administration,
and Programming the Options
(for the 8403, 8410, 8411, and 8434DX
Voice Terminals)
(Instructions and Information
for the Installer, System Manager,
and Provisioning Personnel)
AT&T 555-015-725
COMCODE 107537094
Issue 2 , January 1996

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IMPORTANT SAFETY WARNINGS
When this product is located in a separate building from the telephone communications
system, a line current protector MUST be installed at the entry/exit points of ALL buildings
through which the line passes. However, note that there is a difference between 4-wire and
2-wire installations.
The following are the ONLY acceptable devices for use in a 4-wire installation: (note that
two protectors are needed at each installation point)
AT&T 4-type protectors
ITW LINX LP-type protectors
For 2-wire installations, the following is recommended: (only one protector is needed at
each installation point)
AT&T 4-type protectors
ITW LINX LP-type protectors
However, if the above two protectors are not used, the following is acceptable in a 2-wire
installation:
AT&T 3BIC (Carbon block) or AT&T 3BEW (gas tube) protectors
NOTE:
The 3BIC and 3BEW protectors can be used ONLY for 2-wire installations. They
CANNOT be used for 4-wire installations.
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CAUTION: This voice terminal is NOT for residential use. It is for business
systems applications ONLY. Use in a residential environment could result in
an electrical short circuit when the telephone wiring is set up to provide other
applications, for example, for appliance control or power transformers. The
AC power used in these applications may create a safety hazard by placing a
direct short circuit across the telephone wiring.
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DO NOT DISCARD THE BLANK DESIGNATION CARD
The voice terminal is shipped with a blank button designation card in place under the
transparent cover. Do not discard this button designation card. Instead, place the
preprinted designation card over the blank button designation card which comes with the
voice terminal. This blank designation card can then be used as a substitute if, in the
future, there are changes in features, telephone numbers, or extension assignments on the
voice terminal.
ENVIRONMENTAL INFORMATION
In accordance with international environmental standards, parts of this AT&T voice terminal
have been manufactured with recyclable plastic resins. These telephone parts have been
marked >ABS< so they can be easily identified at recycling or waste recovery facilities
when appropriate.
The paper used in this documentation is also recyclable.
The ``CE´´ Mark
The ‘‘CE’’ mark affixed to this equipment means that it conforms to the European Union
Electromagnetic Compatibility Directive (89/336/EEC).
RESPONSIBILITY FOR THE SYSTEM’S SECURITY
The system manager for each PBX system is responsible for the system’s security. AT&T
does not warrant that this product is immune from or will prevent unauthorized use of
common-carrier telecommunication services or facilities accessed through or connected to
it. AT&T will not be responsible for any charges that result from such unauthorized use.
Product administration to prevent unauthorized use is the responsibility of the system
manager, and he or she should read all documents provided with this product to fully
understand the features available that may reduce the risk of incurring unauthorized
charges.
WARRANTY
All terms and conditions specified in the owner’s agreement with AT&T apply.
HEARING AID COMPATIBILITY
This voice terminal is compatible with inductively coupled hearing aids as required by the
Federal Communications Commission (FCC).
TRADEMARKS
DEFINITY and QUORUM are registered trademarks of AT&T.
IBM and PS/2 are registered trademarks of International Business Machines Corporation.
PassageWay is a trademark of AT&T.
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CONTENTS
The 8400-Series Voice Terminals 1
Checklist of Parts (with PECs and Comcodes) 3
The 8403 Voice Terminal Package 3
The 8410 and 8411 Voice Terminal Packages 4
The 8434DX Voice Terminal Packages 6
Auxiliary Power Supplies for the 8400-Series Voice Terminals 8
Installing Your Voice Terminal 9
Wiring Information 9
General Notes on Wiring and Installation 12
The 2-Wire/4-Wire Line Adapter 12
Auxiliary Power 13
Distance Limitations 13
Desktop Installation 14
Adjusting the 8410D Voice Terminal Desktop Stand 19
Wall Installation 21
Attaching Adjunct Equipment 26
Connecting a Personal Computer and an Analog Adjunct to the 8411 Voice Terminal 28
Connecting the 8411 to a Personal Computer for PassageWay Applications 28
Connecting an Analog Adjunct to the 8411 Voice Terminal 30
PassageWay and Analog Adjunct Status Indications on the 8411 30
Labeling the Designation Card 33
For the 8403 Voice Terminal 33
For the 8410 and 8411 Voice Terminals 34
For the 8434DX Voice Terminal 34
How to Label the Blank Designation Card 35
Switch Administration 37
Programming the Terminal’s Transmission and
Softkey Parameters 37
Circuit Packs Used for the 8400-Series Sets 39
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A Note on Bulk Administration and on LABELMASTER 39
Administering the 8403 Voice Terminal 40
Administering the 8410 and 8411 Voice Terminals 43
Administering Softkey Features on the 8410D and 8411D 47
The Default Softkey Features on the 8410D and 8411D 49
Alternate Softkey Features on the 8410D and 8411D 51
Button Numbering for 8410 and 8411 Voice Terminal Administration 53
Administering the 8434DX Voice Terminal 56
Administering Softkey Features on the 8434DX 58
The Default Softkey Features on the 8434DX 59
Alternate Softkey Features on the 8434DX 61
Button Numbering for 8434DX Voice Terminal Administration 63
The Test Feature and the Diagnostics Feature 67
The Test Feature (For ALL 8400-Series Voice Terminals) 67
The Diagnostics Feature (Used ONLY with the 8411 Voice Terminal) 68
Programming the Options 69
A Shortcut in Programming the Options (for Display Sets) 70
Enabling/Disabling the Speakerphone or Speaker
(or Changing to a Listen-Only Speaker) 71
Enabling/Disabling the Mute Function 72
Selecting Ringing Preference (for a Second Incoming Call) 73
Enabling/Disabling the Status Lights for the PassageWay
Connection (For the 8411 Voice Terminal Only) 74
Enabling/Disabling the Status Lights for the Analog (Tip/Ring)
Adjunct Interface (For the 8411 Voice Terminal Only) 75
Selecting Whether the I1-Channel or the I2-Channel
Will Be Used for the Analog Adjunct (For the 8411 Only) 76
Setting the Audio Volume Control (on the 8411) 77
Setting the Display for 1- or 2-Lines
(for the 8434DX only) 79
Viewing Information on Terminal Options and Parameters 80
Other 8400-Series Voice Terminals Documentation 81
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The 8400-Series Voice Terminals
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There are six different types of 8400-Series voice terminals: the 8403, 8410B
and 8410D, 8411B and 8411D, and 8434DX. The following table lists the voice
terminals and shows the features you can use with each of them.
1

The 8400-Series Voice Terminals
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THE 8400-SERIES VOICE TERMINALS
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Feature 8403 8410B 8410D 8411B 8411D 8434DX
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Liquid Crystal Display (LCD) √√
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Vacuum Fluorescent Display (VFD) √
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Softkeys and Display
Control Buttons √√√
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Call appearance/
Feature buttons 3 10 10 10 10 34
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1-way Speaker √√*√*√*√*√*
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2-way Speakerphone √√√√ √
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Feature Button √
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Shift Button √√√√ √
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Transfer, Hold, Conf,
and, Drop Buttons √√√√√ √
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Test Button √√√√√ √
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Diagnostics Feature
(used with Test Button) √√
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Mute Button √√√√√ √
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Volume Control Button √√√√√ √
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Message Light √√√√√ √
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Personalized Ringing √√√√√ √
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Kickstand (on back of set) √√
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Adjunct Jack √√√√√ √
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EIA-232-D Jack √√
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Analog Adjunct Jack √√
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* The 2-way speakerphone can be optioned as a 1-way (listen-only) speaker,
(or it can be disabled).
2

The 8400-Series Voice Terminals
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Checklist of Parts (with PECs and
Comcodes)
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The 8403 Voice Terminal Package
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The 8403 voice terminal package includes the following items. Comcodes and
Price Element Codes (PECs) are included so you can order additional
equipment.
8403 (8403D01A) Voice Terminal
Black 8403 Set PEC: 3233-03B(A) *
Comcode: 106705106
White 8403 Set PEC: 3233-03W(A) *
Comcode: 106705114
*NOTE: For ordering domestic voice terminals with English labels, use the
attribute CTR15. For ordering voice terminals with international icons,
use the attribute CTR98.
K2S6 Handset
Comcode: Black=107180549; White=107181471
Handset Cord (9-foot)
Comcode: Black=105635429; White=105701809
Designation Card Cover
PEC: 32306(A)
Comcode: 846506780
Line Cord, D8W 8-conductor, 7-foot
Comcode: 103786778
3

Checklist of Parts (with PECs and Comcodes)
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The voice terminal comes with a deskstand and blank button designation card.
The following quantities of 8403 button designation cards can be ordered:
8403 Button Designation Cards
Tractor Feed For 25 Sets, 5 Sheets
PEC: 32307(A)
Comcode: 847167962
Tractor Feed, For 100 Sets, 20 Sheets
PEC: 32308(A)
Comcode: 847167970
The 8410 and 8411 Voice Terminal
Packages
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The 8410 and 8411 voice terminal packages are almost exactly the same except
for the voice terminal. Also, the 8411 is shipped with an MSP-1 power supply; a
power supply does NOT come with the 8410.
Note that there are two types of 8410 and 8411 sets: the 8410B and the 8411B
do NOT have displays; the 8410D and the 8411D have displays.
The following items are included in these packages. Comcodes and PECs are
included for ordering additional equipment.
8410B (8410D02A) Voice Terminal without display
Black 8410B Set PEC: 3234-04B(A) *
Comcode: 106790454
White 8410B Set PEC: 3234-04W(A) *
Comcode: 106790462
8410D (8410D01A) Voice Terminal with display
Black 8410D Set PEC: 3235-05B(A) *
Comcode: 106705122
White 8410D Set PEC: 3235-05W(A) *
Comcode: 106705130
8411B (8411D02A) Voice Terminal without display
Black 8411B Set PEC: 3234-TRB(A) *
with power supply PEC: 3234-PTB(A) *
Comcode for black set: 107526535
White 8411B Set PEC: 3234-TRW(A) *
with power supply PEC: 3234-PTW(A) *
Comcode for white set: 107526543
4

Checklist of Parts (with PECs and Comcodes)
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8411D (8411D01A) Voice Terminal with display
Black 8411D Set PEC: 3235-TRB(A) *
with power supply PEC: 3235-PTB(A) *
Comcode for black set: 107526501
White 8411D Set PEC: 3235-TRW(A) *
with power supply PEC: 3235-PTW(A) *
Comcode for white set: 107526519
*NOTE: For ordering domestic voice terminals with English labels, use the
attribute CTR15. For ordering voice terminals with international icons,
use the attribute CTR98.
K2S6 Handset
Comcode: Black=107180549; White=107181471
Handset Cord (9-foot)
Comcode: Black=105635429; White=105701809
Designation Card Cover
PEC: 32309(A)
Comcode: 846320216
Line Cord, D8W 8-conductor, 7-foot
Comcode: 103786778
The voice terminals come with a deskstand and blank button designation card.
The following quantities of 8410 button designation cards can be ordered:
NOTE:
The 8410 voice terminal uses a different button designation card than the
8411. Both types of cards are listed below.
8410 Button Designation Cards
Tractor Feed For 25 Sets, 3 Sheets (12 cards per sheet)
PEC: 32310(A)
Comcode: 847161817
Tractor Feed For 100 Sets, 9 Sheets (12 Cards per Sheet)
PEC: 32311(A)
Comcode: 847161916
Laser Printer Forms (8 1/2"x11")
67 Sheets (six cards per sheet)
PEC: 32312(A)
Comcode: 847065497
5

Checklist of Parts (with PECs and Comcodes)
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The following quantities of 8411 button designation card (and telephone number
card which fits under the handset) can be ordered:
8411 Button Designation Cards
Package of six 8 1/2’’ by 11’’ cards, 67 sheets
PEC: 31170
Comcode: 847065467
Package of tractor feed nine 8’’ by 17’’ cards, 34 sheets, to be
used by LabelMaster
PEC: 31170
Comcode: 846819530
The following PassageWayTM package contains PassageWay software,
documentation, and cables for PassageWay connectivity: (This package can be
ordered from the Customer Information Center at 1-800-432-6600.)
PassageWay connection software, documentation, and cables
PEC: 8302-800
Comcode: not yet assigned at time of printing
PassageWay documentation can be ordered separately —
PassageWay Solution
User’s Guide for DEFINITY Communications System
. (This document can be ordered
from the Publications Fulfillment Center at 1-800-457-1235.)
Comcode: 107149148
PFC Ordering Number: 560-201-102
The 8434DX Voice Terminal Package
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The 8434DX voice terminal package includes the following items. Comcodes and
PECs are included for ordering additional equipment.
NOTE:
The 8434DX voice terminal has two separate designation cards: on the left
there is a 10-button ‘‘small’’ designation card, and on the right there is a
24-button ‘‘large’’ designation card.
8434DX (8434D02A) Voice Terminal
Black 8434DX Set PEC: 3236-06B(A) *
Comcode: 107239436
White 8434DX Set PEC: 3236-06W(A) *
Comcode: 107239444
*NOTE: For ordering domestic voice terminals with English labels, use the
attribute CTR15. For ordering voice terminals with international icons,
use the attribute CTR98.
6

Checklist of Parts (with PECs and Comcodes)
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K2S6 Handset
Comcode: Black=107180549; White=107181471
Handset Cord (9-foot)
Comcode: Black=105635429; White=105701809
Small Designation Card Cover
PEC: 32309(A)
Comcode: 846320216
Large Designation Card Cover
PEC: 32314(A)
Comcode: 847037553
Line Cord, D8W 8-conductor, 7-foot
Comcode: 103786778
The 8434DX voice terminal comes with a deskstand and blank small and large
designation card.
The following quantities of 8434DX button designation cards can be ordered:
Small 8434DX Button Designation Cards
(for 10 buttons on left of terminal)
Tractor Feed For 25 Sets, 3 Sheets (12 cards per sheet)
PEC: 32310(A)
Comcode: 847161817
Tractor Feed For 100 Sets, 9 Sheets (12 Cards per Sheet)
PEC: 32311(A)
Comcode: 847161916
Large 8434DX Button Designation Cards
(for 24 buttons on right of terminal)
Tractor Feed For 25 Sets, 13 Sheets (two cards per sheet)
PEC: 32315(A)
Comcode: 847141504
Tractor Feed For 100 Sets, 50 Sheets (two cards per sheet)
PEC: 32316(A)
Comcode: 847168747
7

Checklist of Parts (with PECs and Comcodes)
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Auxiliary Power Supplies for the
8400-Series Voice Terminals
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The following power supplies can be used with the 8400-Series voice terminals:
Stand-alone MSP-1 (PEC: 2404-010; Comcode: 406743419)
1145A Bulk Power Supply (PEC: 2404-011; Comcode: 106448939)
Battery for the 1145A (2.5 amp per hour battery)
(Comcode: 106448921)
1145B1 Bulk Power Supply (PEC: 2404-010)
Battery for the 1146B1 (2 amp battery = PEC: 24700;
or 5 amp battery = PEC: 24701)
KS-22911 L2 (replaced by the MSP-1 Power Supply)
NOTE:
This type of power supply cannot be used with the 8411 voice
terminal.
NOTE:
The MSP-1 and the 1145B are global power supplies.
It is recommended that the 1145A and the 1145B Bulk Power Supplies be
used as auxiliary power for the 8411D and 8434DX voice terminals. These
power supplies provide battery back-up, and therefore when power
outages occur, the voice terminal display will continue to operate.
8

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Installing Your Voice Terminal
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Wiring Information
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The 8400-Series voice terminals work in both 4-wire and 2-wire DCP
configurations. Figure 1 shows an enlargement of a voice terminal 8-pin ‘‘LINE’’
jack. The table and figure below describe the pins on this jack and shows the
8-pin modular jack connections.
9

Installing Your Voice Terminal
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Figure 1. A Voice Terminal Line Jack
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LINE INTERFACE
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PIN PAIR NAME DESCRIPTION
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1 2 OD1 4-Wire Output
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2 2 OD2 4-Wire Output
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3 3 ID1 4-Wire Input
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4 1 U-T 2-Wire (Tip)
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5 1 U-R 2-Wire (Ring)
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6 3 ID2 4-Wire Input
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7 4 P1- Adjunct Power –48V
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8 4 P2+ Adjunct Power Common
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10

Installing Your Voice Terminal
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INSTALLATION WARNING
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN CAUSE
DAMAGE TO THE TERMINAL OR CAUSE THE ASSOCIATED
PBX CIRCUIT PACK TO REMOVE POWER TO THE TERMINAL.
IN EITHER CASE THE TERMINAL WILL NOT FUNCTION
CORRECTLY.
The design of this product allows it to operate on either 2-wire or
4-wire DCP circuits. In order for the terminal to function properly in
either 2-wire or 4-wire installations, there must be NO
INTERCONNECTIONS between the wire pairs used for 2-wire and
4-wire operation. Bridging or paralleling of these pairs can result
in damage to the terminal or can cause the PBX circuit pack to
remove power to the terminal.
REMOVE ALL CONNECTIONS BETWEEN PAIRS BEFORE
CONNECTING THE TERMINAL.
For 2-wire operation, if you need to plug the voice terminal into
a 4-pin or 6-pin wall jack, instead of a standard 8-pin modular
jack, refer to the ‘‘Line Interface’’ table below Figure 1 to
insure that the wires from the 4-pin or 6-pin wall jack are connected
to the correct pins on the terminal ‘‘LINE’’ jack.
4-WIRE installations MUST ONLY have PBX connections on pair 2
and pair 3 and, if necessary, auxiliary power must be connected
to pair 4.
2-WIRE installations MUST ONLY have PBX connections on pair 1
and, if necessary, auxiliary power must be connected to pair 4.
This applies to all 8400 series voice terminals, the CALLMASTER III,
and the 302B1 Attendant Console.
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11

Installing Your Voice Terminal
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General Notes on Wiring
and Installation
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Regardless of which configuration is in use, ALL wiring between the PBX and the
terminal MUST consist of twisted-pairs, including the modular line cord. The line
cord must be a D8W, which consists of four twisted-pairs, or an AT&T approved
equivalent.
Twisted-pair wiring is used to make lines less sensitive to crosstalk. Therefore,
failure to use twisted pair wiring may result in less-than-optimum performance of
the terminal and may also contribute to problems with the line.
An 8-wire modular cord MUST be used for all 4-wire and any 2-wire installations
requiring auxiliary power.
You do NOT need to change any settings on the voice terminal for 2-wire or
4-wire installations. The voice terminal is able to detect whether it is in a 2-wire
or a 4-wire configuration.
The 2-Wire/4-Wire Line Adapter
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The 2-wire/4-wire line adapter (PEC: 32302; Comcode: 407124114 for a single
adapter; PEC: 32303 for a package of 25 adapters) is available to accommodate
situations in which customers need to upgrade from an analog-type RJ11C jack
to an 8-wire RJ45X-type jack. This adapter eliminates the need to remove RJ11C
jacks which are presently being used and install new RJ45X jacks in their place.
Please read the CAUTION statement directly below before beginning the
installation. If all connections are correct, plug the adapter into the RJ11C jack
to provide the proper wiring translation to the 8400-Series terminals.
NOTE:
This adapter works ONLY when using an 8400-Series terminal on a 2-wire
16-port (TN2181) digital line circuit card. It will NOT work if you are
connecting an 8400-Series terminal to a 4-wire, 4-port, or 4-wire, 8-port
DCP line circuit card (such as the TN754B, TN754, TN413, SN270B, or
SN270).
CAUTION:
In previous installation of the premises line jacks, customers may have
wired the jack connections as bridged or in parallel. These jacks must be
rewired, at customer expense, in order for the 8400-Series terminals to
function properly in either 2-wire or 4-wire installations. There must be NO
INTERCONNECTIONS between the wire pairs used for 2-wire and 4-wire
operations. Bridging or paralleling of these pairs can result in damage to
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Installing Your Voice Terminal
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the terminal or can cause the PBX line circuit card to remove power to the
terminal. All interconnections between these pairs MUST BE REMOVED
BEFORE the 8400-Series terminals are connected to the jack.
Auxiliary Power
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In both a 4-wire or 2-wire configuration, most of the 8400-Series voice terminals
are phantom powered from the PBX. However, you will need auxiliary power in
the following instances:
If you are using an 8411 or 8434DX voice terminal
NOTE:
You must use auxiliary power with these sets.
If you have an 801A Expansion Module connected to an 8434DX voice
terminal (This expansion module can ONLY be used with the 8434DX
connected to a DEFINITYG3V3.3 or later switch.)
NOTE:
If an 8434DX voice terminal with attached adjunct equipment is
connected to an expansion module, it should be locally powered by
an MSP-1. If this configuration is closet powered by an 1145A,
two ports must be used. A KS-22911 L2 cannot be used in this
situation.
If there is attached adjunct equipment, such as an S201A Speakerphone,
to any of the 8400-Series voice terminals
For a list of possible auxiliary power supplies, see ‘‘Auxiliary Power Supplies for
the 8400-Series Voice Terminals’’ earlier in this manual.
Distance Limitations
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In 4-wire operation, the voice terminal must be within 5,000 feet of the PBX
using 22-gauge or 24-gauge wire, and within 4,000 feet of the PBX using
26-gauge wire.
In 2-wire operation, the voice terminal must be within
5,500 feet (1676.4 meters) of the PBX using 22-gauge wire, within
3,500 feet (1066.8 meters) of the PBX using 24-gauge wire, and within
2,200 feet (670.56 meters) of the PBX using 26-gauge wire.
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Installing Your Voice Terminal
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Desktop Installation
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The following instructions are for a desktop installation. If you are mounting the
voice terminal on the wall, proceed to the next section, ‘‘Wall Installation.’’
1. Turn the voice terminal face down on a flat surface. Then, use the
following figures for installation.
Figure 2 shows the bottom of the 8403 voice terminal. You can
use this diagram for installing the 8403 or the 8410. However, note
that the location of the routing channels on the 8410 differs slightly
from the 8403. Also, the Handset jack on the 8410 is in a different
location.
Figure 3 shows the bottom of the 8411 voice terminal.
NOTE:
The rear of the 8411 set includes two jacks: the Analog
Adjunct jack, for connecting answering machines, fax
machines, PC or laptop data/fax modem cards, data sets or
modems, audio teleconferencing equipment, and TTY
machines commonly used by hearing impaired, and the
RS-232-D Jack for connecting the voice terminal to a COM
port on an IBM- compatible personal computer on which
you can load PassageWay Solution software. For
instructions on connecting hardware to these jacks, see
‘‘Connecting a Personal Computer and an Analog Adjunct to
the 8411 Voice Terminal’’ which appears later in this manual.
Figure 4 shows the bottom of the 8434DX voice terminal. This
diagram can be used for installing the 8434DX.
According to the 8400-Series model you are using, refer to these three
figures for the location of the jacks referred to in the following steps.
NOTE:
If you are installing an 8410D voice terminal, refer to ‘‘Adjusting the
8410D Voice Terminal Desktop Stand’’ for choosing whether the
desktop stand should be in the high or low position. On the 8411,
decide whether you want the kickstand in the up or the down
position.
2. For all voice terminals, snap one end of the line cord into the ‘‘LINE’’ jack
and the adjunct cord (if applicable) into the Adjunct jack on the bottom of
the voice terminal. (The Adjunct jack is labeled on all sets except
the 8411, on which the jack is labeled ‘‘ADJUNCT.’’) For more information
on installing adjuncts, refer to the section ‘‘Attaching Adjunct Equipment.’’
Important:
If you are routing the cords on the 8410D voice terminal and the
desktop stand is in the high position, you may need to place the
cords through the long, rectangular opening that surrounds the jacks
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Installing Your Voice Terminal
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and plug the cords into the jacks BEFORE you insert the desktop
stand onto the back of the voice terminal.
NOTE:
If you are routing cords on the 8411, lift the kickstand and place the
cords under the kickstand.
3. For all sets, thread the line cord (and adjunct cord, if applicable) through
the routing channel leading to the top of the desktop stand, as shown in
Figure 2, Figure 3, or Figure 4, according to the type of terminal you are
using. Make sure that each cord is placed securely under the square tabs
in the routing channel.
4. If you are using an 8434DX with an attached 801A Expansion Module,
plug the D6AP-87 cord, shipped with the expansion module, into the
Expansion Module jack on the 8434DX (labeled ‘‘EX MOD’’) and then plug
the free end of the cord into the jack on the expansion module. The cord
should be threaded through the routing channels on the voice terminal.
See Figure 4. For more detailed instructions on installing the expansion
module to the 8434DX, use the instructions titled ‘‘801A Expansion
Module Instruction Manual,’’ shipped with the expansion module.
Important: An 801A Expansion Module can be used ONLY with an
8434DX voice terminal connected to a DEFINITY G3V3.3 or later switch.
5. For all voice terminals, snap one end of the coiled cord into the Handset
jack (this jack is labeled ). On an 8403, thread the cord into the
channel leading to the side edge of the voice terminal; the handset cord
will then lead off the side of the voice terminal.
WARNING:
Do not insert the handset cord into the Adjunct jack. It may cause
equipment damage.
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