Northern Telecom DMS-100 Series Instrucciones de funcionamiento e instalación

NORTHERN TELECOM PRACTICE 297-2011-200

Issued: 88 12 08

Standard

REL.NO. 01.02

Printed in Canada Northern Telecom 1985 Page i

DIGITAL SWITCHING SYSTEMS

DMS-100* FAMILY

INTEGRATED BUSINES

NETWORK SERVICE

BUSINESS SET, GENERAL DESCRIPTION,

INSTALLATION,

Maintenance and Ordering Information

CONTENTS PAGE

* DMS-100 is a trademark of Northern Telecom.

Reason for Reissue: This revised issue replaces the Standard issue dated

86-05-27. The revisions include the addition of Automatic Call Distribution

(ACD) Sets, incorporation of Appendix 1 (Business Sets and Handsets

equipped with TELADAPT* connectors) and numerous other information

updates and corrections. Due to the substantial changes which require

repagination and renumbering of illustrations, revision marks would not be

helpful and are, therefore, not used in this Practice revision.

PRACTICE 297-2011-200

1. OVERVIEW

1.01 The available versions of the Business Set are as follows:

NT4X20AA Business Set without Alphanumeric Display - with

line cord equipped with Teladapt connectors at both

ends and handset cord hardwired to the set.

NT4X20AE Business Set without Alphanumeric Display - with

line cord equipped with Teladapt connector at the

set-end, spade tips at the other end, and handset cord

hardwired to the set.

NT4X20AL Business Set without Alphanumeric Display - both

line cord and handset cord equipped with Teladapt

connectors at both ends.

NT4X20AB Business Set with Alphanumeric Display - with line

cord equipped with Teladapt connectors at both ends

and handset cord hardwired to the set.

NT4X20AF Business Set with Alphanumeric Display - with line

cord equipped with Teladapt connector at the set-end,

spade tips at the other end, and handset cord

hardwired to the set.

NT4X20AM Business Set with Alphanumeric Display - both line

cord and handset cord equipped with Teladapt

connectors at both ends.

NT4X20AT Business Set with Alphanumeric Display for

Automatic Call Distribution (ACD) service. Equipped

with headset jacks at handset side of set. Line cord

and handset cord equipped with Teladapt connectors

at both ends.

BUSINESS SET

WITHOUT

ALPHANUMERIC

DISPLAY

1.02 These business sets (NT4X20AA/AL/AE) are equipped with:

•eight feature or Directory Number (DN) access keys and associated

Liquid Crystal Display (LCD) indicators

•two feature keys without LCD indicators

•four fixed feature keys without LCD indicators (Vol.Up, Vol.Down,

Hold, and Rls)

•a standard 12-button telephone key pad, and

•internal option switches.

1.03 All business sets use voice and “above voice band” signaling

transmission over a 2-wire line. Voice and signaling are frequency division

multiplexed, with binary data transmitted via absence or presence of the carrier

frequency. All feature activation is via this transmission.

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PRACTICE 297-2011-200

Feature Keys,

Assignable 1.04 The feature keys can be assigned a subset of the following features:

Key De- Acro-

signation Feature Description nym

Auto Dial Automatic Dialing AUD

Auto Line Automatic Line AUL

Call Fwd Call Forward CF

Call Park Call Park PARK

Call Wait Call Waiting CWT

Conf Conference Calls CON

Conf3 Three-way Conference TWC

I/C Group Intercom Group GIC

Intercom Intercom Calls ICM

Station.. Station Busy Indication SBI

Msg Wait Message Waiting MWT

Make Busy Make Busy MSB

Override Busy Override EBO

Pickup Call Pickup CPU

Privacy Privacy PRV

Priv Rls Privacy Release PRL

Ring Again Ring Again RAG

Speed Call Speed Call SCS

Time/Date Query Time and Date QTD

Transfer Call Transfer CXR

1.05 LCD indicators associated with the feature keys support the following

four key/LCD states:

FUNCTION LCD STATE

idle or feature inactive LCD off

active or feature active LCD on

incoming call or feature pending LCD flashing (60 IPM)

call on hold LCD winking (120 IPM)

Feature Keys, Fixed 1.06 Non-optional keys on the sets provide three permanent functions; call

Hold, call Release, and Volume Control.

1.07 Hold. The HOLD function has two modes of operation, manual and

automatic. With the user engaged in a call, the call can be put on hold either by

pressing the HOLD key or by pressing another DN key. In either case the DN

LCD indicator changes from ON to “winking” and the user is free to answer or

make another call.

1.08 Release. The RLS (release) key performs the same function as going

on-hook, i.e. when pressed, it terminates a call. The DN LCD indicator

associated with the released call changes from the ON state to the OFF state.

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PRACTICE 297-2011-200

1.09 Volume Control. The speaker volume is controlled by two keys,

VOL UP and VOL DOWN. Operating these keys incrementally increases or

decreases the speaker volume during an ongoing session. The handset receiver

volume is not affected in any way by these speaker volume adjustments. After

session has ended, the speaker volume returns to the default value. The

following adjustments to the default settings are possible:

(a) To change the default value for voice and dial tone, press both the VOL

UP and VOL DOWN keys simultaneously when the signal is present

and after the desired volume level has been obtained. This causes the

current volume setting to be stored as the new default value.

(b) To change the default value of the alerting tone, press the VOL UP or

VOL DOWN keys while the alerting signal sounds. Obtain the desired

level in the same manner as stated above for the speaker volume. The last

set value becomes the new default value.

Note: When the business set is powered down by disconnecting the loop

or the power supply, the voice and dialtone volume returns to the lowest

level, and the alerting tone level goes to the middle point setting when the set

is reconnected.

Basic Features 1.10 Every Business Set has the following basic features:

(a) Automatic Prime DN selection: allows the user to select the prime

DN (i.e., the DN assigned to the 1st key) by going off-hook to answer a

call without pressing a DN key.

(b) On-hook Dialing: allows a call to be dialed by selecting a line and

dialing the number without lifting the handset. The handset must be

lifted once the called party answers.

handset and listen via the speaker until the other party returns to the call.

(d) Alerting Tones: Warble tone sounds when telephone is on-hook,

buzzer tone sounds when telephone is off-hook.

BUSINESS SET WITH

ALPHANUMERIC

DISPLAY

1.11 In addition to the features provided by the basic business set, the

NT4X20AB, AF and AM sets include a 32-character alphanumeric LCD

display which permits access to the following features:

•Called Number Display

•Calling Number Display

•Query Time and Date (QTD) Display

•Feature Programming

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PRACTICE 297-2011-200

•Feature Usage.

Note: One feature key must be reserved for accessing the QTD display.

Because an LCD indicator is not required for this feature, a feature key

without an associated LCD indicator should be chosen for the QTD display

function. Other features can be assigned, from the switching software, to

function automatically or when called up by operating an assignable function

key. The “Calling Number Display” can be assigned to be activated either at

the first alerting tone, or after the handset (or handsfree option) has been

picked up (or activated). The “Called Number” display is always activated

automatically as dialing takes place.

ACD SET WITH

ALPHANUMERIC

DISPLAY

1.12 The NT4X20AT Automatic Call Distribution (ACD) business set is

intended for use by attendants. It provides head-set and handset capabilities

and makes use of DMS-100 switch software for incoming automatic call

distribution and an optional feature for equal loading of operators. An “agent

jack” (dual PJ327 type) is provided at the handset side of the set to allow

connection of an agent's headset assembly. The ACD business set can be

equipped with up to three 20-key/16-LCD indicator strip add-on units but it

cannot be provided with a Handsfree unit. The ACD set always requires

alternate (external) power. If the alternate power supply fails, the ACD set will

not be operational (no “Fail to POTS”). The following headset is

recommended for use in conjunction with the ACD set:

•Plantronics Supra, HS 0552-1

1.13 The NT4X20AT includes a 32-character alphanumeric LCD screen

which permits access to the following features:

•Called Number Display (BCS-28)

•Calling Number Display

•Query Time and Date (QTD) Display

•Feature Programming

•Feature Usage.

Note: One feature key is required for accessing the QTD display. Because

an LCD indicator is not needed for this feature, a feature key without an

associated LCD indicator should be chosen for the QTD display function.

Other features can be assigned, from the switching software, to function

automatically or when called up by operating an assignable function key.

The “Calling Number Display” can be assigned to be activated either at the

first alerting tone, or after the handset (or handsfree option) has been picked

up (or activated). The “Called Number” display is always activated

automatically as dialing takes place.

20-BUTTON ADD-ON

MODULE 1.14 The NT4X20AC is a 20-key/16-LCD add-on module which extends

the capability of a Business Set by adding more feature key/LCD indicator

strips. It features two rows of 10 keys; the top two keys in each row are not

Page 1-4

PRACTICE 297-2011-200

equipped with LCD indicators and are used for features which do not require

LCD indication (example: QTD key). This add-on unit attaches to the right side

of the business set if only one add-on unit is provided, or to the end of a row of

1 or 2 add-on units (the NT4X20AC is an end-unit which does not allow

further addition of any equipment at the right hand side of the unit).

Note: The NT4X20AC is rated A&M (additions and maintenace). Spare

parts for this module can still be ordered in accordance with Table 5-B.

1.15 The NT4X20AG is similar to the NT4X20AC add-on unit in

appearance and arrangement of key/LCD indicator strips, but can be used either

as an extendable add-on unit or as an end-unit.

AUTO-ANSWERBACK

(AAB) KIT 1.16 The NT4X20AJ Kit contains one NT4X21AD module which mounts

in the Business Set to provide the AAB feature, and two (2) P0180923

mounting screws. The Business Set must be equipped with a Handsfree Unit

when this feature is assigned. This kit cannot be used with the NT4X20AT

ACD business set.

HANDSFREE UNIT 1.17 The NT1L00AA or NT1L05AA Handsfree Units (HFU) are identical

in function to the Companion and Logic Handsfree units, and are designed for

connection to the left side of the Business Sets. Provision is made for:

•accepting incoming calls on either the HFU or the associated business set

•transferring calls between the HFU and the associated business set

•dialing outgoing calls with the handset either on-hook or off-hook

•automatic cutoff of the HFU when the handset is lifted off-hook for

handset operation.

1.18 Controls on the face of the HFU are as follows:

•Volume control: to set the volume of the received signal on the HFU

speaker.

•Indicator lamp: monitors the operating mode of the unit, i.e. the lamp

is on when the unit is in the transmit mode, and off when the unit is in

the receive mode.

•ON key: used to switch on the unit. The key must be depressed

momentarily to answer an incoming call with the handset on-hook or

before commencing on-hook dialing. The key must be held depressed

until the handset is placed on-hook to transfer from handset to handsfree

operation. The key may be held depressed to hold a call on the unit with

both transmission and reception cut off (Note).

•OFF key: used to terminate a call on the HFU (Note).

•MUTE key: used to cut off transmission without affecting reception

(Note).

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PRACTICE 297-2011-200

Note 1: On handsfree units designed for bilingual or international use

(example: NT4X05AA), keys are designated with icons. Refer to Fig. 1-1.

Note 2: The handsfree unit cannot be added to an ACD business set

(NT4X20AT).

Fig. 1-1

Handsfree Unit Key Designations

Page 1-6

PRACTICE 297-2011-200

2. INSTALLATION

INTERCONNECTIONS 2.01 Each Business Set is equipped with a 6-conductor line cord for

connection to standard telephone terminal connectors as follows:

•NT4X20AA, NT4X20AB, NT4X20AL, NT4X20AM, and

NT4X20AT sets are equipped with NE-D6QT-87 Teladapt connectors

•NT4X20AE and NT4X20AF sets are equipped with NA 800 905 spade

tips

2.02 The conductors in the line cords are color coded for termination as

given in Table 2-A.

2.03 For block diagrams of the interconnections of the business sets refer to:

Fig. 2-1 Business set without alphanumeric display

Fig. 2-2 Business set with alphanumeric display

Fig. 2-3 ACD business set with alphanumeric display

Table 2-A

BUSINESS SET CORD CONNECTIONS

CONNECTIONS TO (Note 1)

ALTERNATE POWER HANDSFREE UNIT

LEAD COLOR LINE SUPPLY (Notes 2,3) POWER SUPPLY

Green Tip

Red Ring

Yellow AP+

Black VSS

Blue HFRET

White HFAP+

Yellow Jumper AP+ VBB

(Note 4)

Note 1: Quick-Connect wire terminal locations are given in Fig. 2-13 (for basic set), Fig. 2-14 (for display

set), and Fig. 2-15 (for ACD set).

Note 2: Local ac power supplies (Plug-in transformer) must only be used with a 2.1 m (7 ft) linecord and a

T-adapter. Remote ac power is not recommended.

Table Continued ------------------------------------

Page 2-1

PRACTICE 297-2011-200

Table 2-A Continued

BUSINESS SET CORD CONNECTIONS

Note 3: Wire remote (closet) power supply 24 V dc secondary leads from the nearest outlet to the junction

box or Teladapt jack serving the unit to be powered. The following restrictions apply:

•Separate cables to each set (or workstation) must be used, only containing Tip, Ring and dc power supply

leads for that set (or workstation). No paralleling of pains to reduce line resistance is permitted.

•Distribution of closet power to a number of sets in the same cable is not permitted because noise pickup and

crosstalk can occur between power wires.

•A separate, isolated power supply circuit is required for each set (or workstation).

In a “fully loaded” situation (display and three add-ons), the maximum allowable run-lengths and minimum wire

gauges for these supply lead pairs are as follows:

•22 or 24 AWG run-length maximum = 76 m (250 ft) (.0324 Ohm/ft or .0514 Ohm/ft)*

•26 AWG run-length maximum = 46 m (150 ft) (.0820 Ohm/ft)

•Tinsel-wire line cord maximum = 2.1 m (7 ft) (1.7 Ohm/ft)

The maximum permissible power feed resistance (combined resistance of all feed wiring) is 25 Ohm. If any doubt

as to resistances and/or wire type used exists, the total resistance of the supply lead pair (total resistance of both

wires end-to-end) should be measured. The above figures assume a standard seven foot line cord. If a longer line

cord is used, the additional line cord resistance has to be considred and the total allowable run-length of power

feed wiring must be reduced accordingly.

*With the exception of the tinsel-wire linecord, which has a very high resistance, the resistance of the wiring

between the power supply and the telephone is not the sole limiting factor, but the noise pickup and crosstalk

susceptibility must also be considered. Consequently, the power feed line length cannot be extended beyond 76

m (250 ft) even if the wire size is increased from 24 AWG to 22 AWG, however, the 22 AWG could be used

where line resistance must be reduced due to a longer than 2.1 m tinsel-wire linecord.

Note 1: A spade tipped jumper P013E419 can be run from the Handsfree unit through the plug adaptor to

the AP+ terminal on the business set circuit board to provide power for one add-on unit, or for the

alphanumeric display portion of one business set in some cases (Fig. 2-11).

Page 2-2

PRACTICE 297-2011-200

Fig. 2-1

Block Diagram - Business Set without Alphanumeric Display - Interconnections

Page 2-3

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