Bell 801A PBX Manuel utilisateur

BELL

SYSTEM PRACTiCES

AT&TCo Standard

1. GENERAL

ATTENDANT

AND

STATION EQUIPMENT

METHOD OF OPERATION

SOlA

PBX

SECTION .553-201-300

Issue 2, April 1974

1.01 This section describes the methods of operating

the

attendant

position and

station

equipment

associated

with

the

801A PBX.

The

attendant

position equipment will consist of 24- (short housing,

non-DSS), 34-

(short

housing, DSS)

and

54- (long

housing,

DSS)

type

telephone

consoles

equipped

with

rotary

or TOUCH-TONE® dials. The station

equipment

may be any single line or multiline desk

or wall-mounted telephone set.

1.02 This section is reissued to include information

the

stutter

dial

tone,

electronic

dial

repeating

tie

trunk,

and

attendant

control of station

dial access to

trunk

groups

features,

and to make

minor changes to typical call sequences.

1.03 Amaximum of two

attendant

positions

may

be provided in

the

PBX. All

trunks

(with

the

exception of

attendant

trunks

and

some special

service

circuits)

may

be'

multipled

between

the

consoles giving each

attendant

full access to

the

system.

Direct

Station

Selection

(DSS)

may

provided

to a

maximum

lines

when

the

34-type console is used, or to a maximum of 180

lines when the 54-type console only

used; however,

DSS

may

be extended to

the

full 270-line capacity

ofa4-cabinet

system

when a 1A1 selector console

used

as an adjunct of

the

54-type console.

1.04

When

the

PBX

arranged

for

multiple

console

operation

(two

attendant

positions

provided)

attendant

position

select

circuit

required which controls multiple

attendant

operation.

Since

attendant

trunks

are

not

multipled

between

the

two

attendant

consoles,

the

position select circuit

steers

"dial

attendant

trunk

calls.

both

attendants

are

idle,

the

request

for

attendant

trunk

will be

steered

to one console on a random

basis.

attendant

busy

(any

trunk

pickup

key operated) and

the

other

attendant

is idle,

the

request

for

attendant

trunk

will be

steered

the

idle

attendant.

both

attendants

are

busy

with

any

type

trunk

call,

subsequent

requests

for

attendant

trunks

will be

steered

on a random basis.

selective

attendant

dialing is provided,

and

the

station

user

·dials

the

assigned

access

code of a

specific

attendant,

the

request

will be

steered

the

requested

console

whether

idle or

busy

(see

Tables D and P).

1.05 When multiple console operation is provided

and a pickup key (or DSS key) is

operated

one

console,

the

corresponding

key

lamp

the

other

console is

arranged

light

steadily.

The HOLD condition is

the

only. exception. The

HOLD flash

rate

appears

only

the console from

which

the

hold operation

was

initiated.

aposition

busy

(POS BSY)

key

operated,

all hold

flash

rates

appear

both consoles.

1.06

.When

the

attendant

control of station dial

access to

trunk

groups

feature

is provided

(24B-, 34B-, or 54B-type consoles

furnished),

the

attendant

may

operate

up to

threeTGR-

(trunk

group

restriction) keys to cause all outgoing (station

dialed)

calls

any

trunk

the

trunk

groups

strapped

the

key(s) to be

routed

the

attendant

on an

attendant

intercept

basis.

The

attendant

may

then

complete

the

outgoing call on

either

attendant-dialed or

through

dial basis. When

the

key(s) is released, stations

may

access

trunk

groups

the

normal manner. All

trunk

groups, including

the

main, may be

strapped

for

this

feature

.•

1.07 The tables in this section show lamp signals

present

both

consoles.

Console

A is

assumed

to be

the

controlling console while lamp

©American Telephone and Telegraph Company, 1974

Printed in U.S.A. Page 1

SECTION 553-201-300

signals for Console B are considered supplementary

information.

For

systems with only one console,

disregard Console B information. Either console

can be considered Console A

the beginning of a

callsequence.

1.08 Manuals covering consoleequipment operation

and attendant instructions for use with the

80lA

PBX

are

available to

the

customer.

The

manuals

are

999-200-136

Attendant

Operating

Instructions-

24-Type

Console-801A

PBX and

999-200-137

Attendant Operating Instructions-34-54

Type

Console-

801A DSS PBX.

1.09

Lettered

Steps: Aletter a, b, c, added to

step

number

Part

2 of

this

section,

indicates

action

which

mayor

may

not

required depending on local conditions. The condition

under which a lettered step

ora

series of lettered

steps

should

be made is given in

the

ACTION

column, and all steps governed by the same condition

are designated by the same letter within a table.

Where a conditiondoes not apply, all steps designated

that

letter should be omitted.

1.10 Symbols are used in the tables to represent

console key operations

(attendant

action)

and console lamp indications. The symbols used,

in this section are as follows:

(

CONSOLE KEY CONSOLE LAMP

Symbol

Operation

Symbol

Indication

Operate

Steadily

lighted

Momentarily

Dark

(Not

Lighted)

Operate

Winking

- 30

ipm

Hold

Flashing

- 60

ipm

Operated

Flashing

Wink

- 60

ipm

Winking

- 120

ipm

Flashing

120

ipm

(

1.11

tThis

issue of the section is based on the

following drawings: SD-1E304-01, Iss 3 Line Circuit (

DRAWING

TITLE

SD-IE305-01, Iss 7 Register Circuit

SD-1E306-01, Iss 4

One-Way

Outgoing

Central

Office Trunk

SD-IE300-01, Iss 3 Systems Application

SD-IE301-01,

Iss

5 SwitchingNetwork and Network

Control

SD-IE302-01, Iss 11Common Control

SD-IE303-01, Iss 3 Auxiliary Line Circuit

Page 2

SD-1E307-01, Iss

One-Way Incoming or Two-way

\.Outgoing Central Office Trunk

SD-1E308-01, Iss 3 Attendant Trunk

SD-1E309-01, Iss 4 Attendant Position

SD-IE310-01, Iss 4 Busy Tone Trunk

(

SD-IE311-01,

Iss

3Intercommunicating

Trunk

SD-IE312,;.Ol,

Iss

Fuse,

Alarm,

Emergency

Transfer,

and

Test

,SD-IE313-01,

Iss

3Attendant Controlled Conference

SD-IE314-01,

Iss

3Attendant Direct Station Selection

SD-IE315-01,

Iss

3 Camp-on

SD-IE316-01,

Iss

5Station Dial

Transfer

SD-IE317-01,

Iss

3 Dial Conference

SD-IE318-01,

Iss

3Ringdown Tie

Trunk

SD-IE319-01,

Iss

4Two-way Auxiliary

Trunk

SD-IE320-01,

Iss

One-way

Outgoing

Auxiliary

Trunk

SD-IE322-01,

Iss

Attendant

Console

SD-IE323-01,

Iss

9Position Select

SD-IE324-01,

Iss

4Ringing and Tone Supply

SD-IE330-01,

Iss

15System Interconnection

SD-IE290-01,

Iss

Emergency

Transfer

Circuit

tSD-IE321-01,

Iss

1 Dial Repeating Tie Trunks

this

issue

is to be

used

with

equipment

apparatus

reflecting

later

issue(s) of

the

drawing(s),

reference should be made to

the

SDs and CDs to

determine

the

extent

the

changes

and

the

manner

in which

the

section

may

be affected.

2. METHOD OF OPERATION

2.01

When

overall

operations

the

PBX

are

performed,

PBX

stations,

trunks,

auxiliary

equipment,

etc,

are

employed'

establish

the

necessary

conditions. To select a

particular

circuit,

may

be necessary to make

other

circuits in

the

group

busy

to force selection of the desired circuit.

2.02

Care

should

exercised

removing

equipment

from

service

during

periods

heavy

traffic

prevent

adverse service restrictions.

ISS 2, SECTION 553-201-300

2.03

Where

the

direct

station

selection

(DSS)

service

feature

is provided, when a

station

line circuit is seized its associated DSS lamp will

light steadily.

2.04

tThe

24A-, 34A-,

and

54A-type

consoles

used~

with

this

PBX

are

equipped

with

locking

trunk

pickup (TRK) keys, a locking position

release

(POS RLS)

key,

and

anon

locking

hold

(HOLD) key. Also provided are three push-to-operate,

push-to-release keys designated position

busy

(POS

BSY),

night

(NITE), and audible signal (AUD SIG)

and four nonlocking keys designated

transfer

(TRFR),

release

destination

(REL

DEST),

page

(PAGE),

and

start

(START). Two lamps, designated

major

alarm

(MAJOR ALM)

and

minor

alarm

(MINOR

ALM)

are

provided to

alert

the

attendant

alarm

conditions

within

the

system.

tIn

addition,

the

24B-, 34B-,

and

54B-type consoles provide

three

push-to-operate, push-to-release and two nonlocking

keys which

are

undesignated. These keys may be

used to provide

the

attendant

control of dial access

trunk

groups

feature

(the

push-to-operate,

push-to-release

keys)

provide

access

supplementary

paging'equipment (nonlocking keys).

These

keys

will be

connected

and

designated

time of installation.s

2.05

The

first

operation

of a

push-to-operate,

push-to-release key establishes

the

condition

controlled

the

key. The second

operation

the

key will

release the

condition.

For

example,

the

first

operation of the NITE key

transfers

the

system

night

service operation.

"I'o

release

the

night

service condition,

the

NITE key is

operated

asecond time.

2.06 When

the

attendant

transfers

a call to

the

attendant

conference circuit (Table K) or to

acentral office

trunk

using

straightforward

outward

completion (Table D),

the

keys

must

operated

the

order

specified in

the

tables for successful

completion.

another

operation is

be performed

between

the

time

the

attendant

answers

an incoming

attendant

trunk

call

and

the

time

the

call

completed to

the

central office

trunk

attendant

conference

circuit

the

attendant

trunk

should be

placed on hold and its identity remembered. The

attendant

trunk

may

be placed on hold by

operating

either

the

hold key,

the

position

release

key, or

another

trunk

key. When the call is to be completed,

the

attendant

reoperates

the

held

attendant

trunk

key

and

uses

the

sequences

indicated in Table D

or K to complete

the

call.

Page

SECTION 553-201-300

2.07

Index

Tables

tor

Typical

Calls:

TABLE

TITLE

PAGE (

OUTGOING

CENTRAL

TABLE

TITLE

PAGE

OFFICE

TRUNK

CALL

STATION

CALL

DIAL

REPEA

TING

(

TIE

UNK

CALL

INCOMING

CENTRAL

OFFICE

CONFERENCE

CALLING

TRUNK

CALL

(STATION

CONTROLLED)

CALL

TRANSFER

INDI-

TTENDANT

CONFERENCE

VIDUAL

WITH

PRIV

ArrE

lVI

ElVIERGENCY

TRANSFER

CONSULTATION

AND

ADD-ON

CONFERENCE

13 N

NIGHT

SERVICE

(

INCOMING

ATTENDANT

DIRECT

TION

TRUNK

CALL

(SINGLE

SELECTION

CALL

MULTIPLE

CONSc0LES)

19 P

PAGING

MULTI-CONSOLE

OPERATION

CODE

CALL

(POSITION

BUSY

FUNCTION)

21 R

PBX

INTERFACE

TTENDANT

STATION

TRUNI{

CALL

RECORDED

TELEPHONE

GINCOIVIING

RINGDOWN

DICTATION

CALL

TIE

TRUNK

CALL

ATTENDANT

CONTROL

OF!

OUTGOING

RINGDOWN

STATION DIAL ACCESSTO

TRuNK

TIE

TRUNK

CALL

GROUPS.

Page 4

TABLE A

STATION TO STATION CALL

(See

2.03)

CONDITION

RESULTS

EACTION .

REMARKS

Call

to Idle Station

PBX

station

Remove

handset

from

switch

hook

Dial

tone

heard

Dial

tone

silenced

Dial

code of

assigned

station

Audible

ringing

tone

heard

called

station-

.Ringer

heard

Ringer

silenced

called

station

calling

station

Answer

incoming

call

Audible

ringing

tone

silenced

Conversation

satisfactory

between

calling

and

called

parties

PBX

stations

Disconnect

from

call

Call

to PBX Station -

All

Intercommunicating Trunks Busy

PBX

station

Remove

handset

from

switchhook

Dial

tone

heard

Dial

code

assigned

station

Dial

tone

silenced

Busy

tone

heard

Disconnect

from

call

CoII to Busy Station

PBX

station

Remove

handset

from

switchhook

Dial

tone

heard

Dial

code

busy

PBX

station

Dial

tone

silenced

Busy

tone

heard

Disconnect

from

call

iii

...

TABLE B

INCOMING

CENTRAL

OFFICE

TRUNK

CALL

(See

1.05, 1.06,

and

2.03)

CONDITION

RESULTS

CONSOLE A CONSOLE B

TKEY

LAMPS

EACTION

REMARKS

pDESIG OPR CO RD CO RD

TRK

Incoming

Signal

Idle

condition

e e ee

Incoming

signal

from

CO ®e

console

(s)

®e

Audible signal' heard

Atnd

answers

CO 00eAudible signalsilenced 0e

TRK

Conversation

satisfactory

Answering

Attendant

Holds Call

Atnd

holds

call

HOLD MO

Conversation

inhibited

Atnd

reenters

held

call

00e

Conversation

satisfactory

TRK

Call

Extended

to Idle

Station

Atnd

dial

tone

connection

START

MO 0e

Dial

tone

heard

atnd

D-ial

tone

silenced

Atnd

dials

code

idle

station

®e

Audible

ringing

tone

heard

atnd

called

PBX

station

Ringer

sounds

Atnd

releases

before

called

party

answers

POS

0®e

Audible

ringing

tone

heard

by CO

party

®e

RLS

Atnd

reenters

before

called

party

answers

0®e

Audible

ringing

tone

heard

atnd

and

TRK

calling

party

1ft

-I

...

-<,

-a

TABLE B (Cont)

INCOMING

CENTRAL OFFICE TRUNK CALL

CONDITION

RESULTS

CONSOLE A CONSOLE B

TACTION

KEY

LAMPS

REMARKS

LAMPS

PDESIG OPR CO RD CO RD

TRK TRK

TRK

Ringer

silenced

called

PBX

station

-0e

atnd

console

-0e

Remove

handset

from

switchhook

Audible

ringing

tone

silenced

3-way

conversation

satisfactory

Atnd

and

calling

party

release

POS

0e e

Console

idle

RLS

Audible

ringing

tone

heard

atnd

Repeat

Steps

1, 2, 3, 6,

and

called

PBX

station

-0e

Ringer heard

Ringer

silenced

called

PBX

station

atnd

console-

Audible

ringing

tone

silenced

Remove

handset

from

switchhook

Conversation

satisfactory

between

atnd

and

called

party

-calling

party

excluded

Atnd

releases

POS

00e

Conversation

satisfactory

between

calling

RLS

and

called

parties

Atnd

reenters

CO 00e3-

Way

conversation

satisfactory

TRK

Atnd

releases

POS

00e

Conversation

satisfactory

between

calling

RLS

and

called

parties

Attendant

Recall

Conversation

momentarily

inhibited

PBX

station-

call

transfer

individual-feature

eis

not

provided

Flash

switchhook

Audible

ringing

tone

heard,

and

atnd

Console

(s)

audible signal heard

iii

«It

1ft

...

CII

...

"'U

TABLE

B (Cont)

INCOMING

CENTRAL

OFFICE

TRUNK

CALL

CONDITION

RESULTS

CONSOLE

TACTION

KEY

LAMPS

REMARKS

LAMPS

pDESIG OPR CO RD CO RD

TRK

18a

call

transfer-individual

feature

provided

Audible

ringing

tone

heard

PBX

station

atnd

consoles -

Dial

tone

heard

• (See

Note).

Audible signal

heard

Dial

Atnd

answers

CO 00eAudible signal silenced 0e

TRK

3-W

conversation.

tisfactory

Conversation

satisfactory

between

atnd

and

calling

party

Answering

atnd

releases

called

party

REL

MO 0e

PBX

station-

DEST

Dial

tone

heard

Call

may

extended

another

PBX

station

tie

trunk

PBX

station

-0e0e

Disconnect

from

call

22b

'other

tests

are

performed

POS

0e e

Atnd

console

and

trunk

restored

Atnd

and

calling

party

release

RLS

idle

condition

Attendant

Dials

Code

of Busy

Station

(If

Camp-On

Not

Provided),

Busy Tie Trunk, 0, First CO

Trunk

Group

Access

Code,

Restricted

Code,

Unassigned

Code,

or All Links Busy

Condition

Atnd

dial

tone

connection

START

MO 0e

Dial

tone

heard

atnd

Busy

station,

Dial

tone

silenced

busy

tie

trunk,

Busy

tone

heard

0 0

Atnd

dials

code

all

links

busy

first

trunk

Dial

tone

silenced

group

access code

Busy

tone

heard

Allow

busy

tone

tobe

returned

for

Busy

tone

momentarily

silenced

as 0e

.10

seconds

resets

~Note:

stutter

dial tone

feature

is provided (AC76B circuit pack in

circuits) dial tone will

consist

ofthree

short

bursts

of dial tone followed by continuous dial tone.a

tit

...

/.----'"

.rr>:

-0

-e

TABLE

B (Cont)

INCOMING

CENTRAL

OFFICE

TRUNK

CALL

CONDITION

RESULTS

CONSOLE A CONSOLE B

TACTION KEY LAMPS

REMARKS

LAMPS

PDESIG OPR CO RD CO RD

TRK TRK TRK TRK

Attendant Releases With Trunk Connected to a Register

Atnd

releases

POS

0@eCO

trunk

hold

RLS

Busy

tone

silenced

Atnd

reenters

held

trunk

CO 00e

Conversation

between

atnd

and

calling

TRK

party

satisfactory

Atnd

and

calling

party

release

POS

0e e

Atnd

console

and

trunk

restored

e e

RLS

idle

condition

Call Extended to Station With Camp-On

one

PBX

station

-e e

Two

DSS

lamps

steadily

lighted

e e

Complete

station

call

Repeat

Steps

through

30e0e

Atnd

dial

tone

connection

START

MO 0e

Dial

tone

heard

atnd

first

station

not

hunting

group

---

Atnd

dials

code

first

busy

station

Atnd,

first,

and

second

station

hear

audible

camp-on

tone

Atnd

releases

POS

RLS

Repeat

Steps

through

30eCO

trunk

Steps

through

39 is second 0e

incoming'

trunk

Atnd

dial

tone

connection

START

MO 0e

Dial

tone

heard

atnd

Atnd

attempts

camp-on

second

incoming

Dial

tone

silenced

trunk

cal

lon

first

station

e0e

Dials

code

first

busy

station

Busy

tone

heard

atnd

;;;

...

fA)

TABLE

B (Cont)

INCOMING

CENTRAL OFFICE TRUNK

CAll

CONDITION

RESULTS

CONSOLE A CONSOLE B

TACTION KEY

~t..MPS

REMARKS LAMPS

pDESIG OPR CO RD CO RD

TRK TRK TRK TRK

Atnd

releases

from

busy

tone

REL

MO 0

Conversation

between

atrid

and

calling

DEST

party

satisfactory

--------'-

---

r---

Atnd

dial

tone

connection

START

MO 0e

Dial

tone

heard

atnd

_._------

Dial

tone

silenced

Atnd

calls

second

busy

station

C!)

second

station

not

hunting

group

-0e

Dials

code

Atnd,

second,

and

first

station

hear

audible

camp-on

tone

Atnd

releases

POS

C!)

RLS

_ w

first

and

second

PBX

stations

Ringers

heard

Disconnect

from

call

first

and

second

PBX

stations

Ringers

silenced

Conversation

between

and

station

Answer

incoming

call

parties

satisfactory

PBX

stations

and

parties-

ee ee

Disconnect

from

calls

Note:

When

all

camp-on

stores

are

busy,

the

attendant

will

receive-

busy

tone

when

dialing

busy

station

which

not

hunting

group.

Call

Extended

to Ringdown Tie Trunk

Repeat

Steps

through

30e0e

1"---.

I---

45 A

tnd

dial

tone

connection

START

MO 0e

Dial

tone

heard

atnd

Atnddials

code

ring

down

tie

trunk

Dial

tone

silenced

2-second

audible

ringing

tone

heard

CIt

...

~-,

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