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T
R
A
A1
L
T O STATION
CUTDOWN
LG
( NOTE 1 )
BZ
BZ1
B ( NOTE 5 )
H
T O 2012B
TRANSFORI'IER
*
INSULATE AND STORE
NOTES :
1 . TERI'IINATE ON TERI'IINALS FOR STATION CODE
ASSIGNED ON 1B4C1 BACKBOARD OR YELLOW FIELD.
2. IF TELEPHONE SET IS EQUIPPED WITH SCREW
TERI'IINALS , 010W CORD FROI'I 2A TRANSI'IITTER
RECEIVER CAN BE TERI'IINATED DIRECTLY IN SET .
WHERE SCREW TERI'IINALS ARE NOT AVAILABLE, SUCH
AS IN CALL DIRECTORS , USE SSE3-25 OR SSEB-25
CONNECTING BLOCK TO ACCESS PROPER LEADS .
3 . T , R, LP AND LG ARE LEADS ASSOCIATED WITH
PICKUP BUTTON ASSIGNED TO SB INTERCOM.
4. T AND R TO 2A TRANSI'IITTER - RECEIVER MUST BE
REVERSED .
5 . DISCONNECT B LEAD FOR OPERATION O F HFA1 UNIT
WHEN STATION IF OFF=HOOK ON CO/PBX LINE
6. ADD CONTINUOUS RING OPTION TO 484A KTU.
Fig. 6-Connections Between 2A Transmitter-Receiver
and Telephone Set for HFAI
(2) Lift telephone handset. Lamp should light
steady and intercom dial tone heard. Refer
to Table B for call progress tones.
(3) Dial desired 2-digit station code.
associated with intercom at called station
will flash and 10-volt ac audible signal will
operate. Audible ringback is heard at the calling
station.
Note:
If the called station is busy on intercom
(handset off-hook), the calling station will hear
the busy signal. If the called station is busy
on a CO/PBX call (handset off-hook) the calling
BSP 518-411-100-i01_1978-08-17.jpg
TELEPHONE
SET ( NOTE 3 )
( W-BL )
T
( BL-W)
R
( NOTE 4 )
A1
( 0-W)
( S-W)
v s
LG2
( W-S )
LP
( BR-W )
LG 1
( W-BR )
AC1
( G-W)
AC2
( W-G )
( W-0 )
*
Scanned by Fra n k Harrell, (Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 21:00:22
2A T-R
party will hear audible ringback and the called
( NOTE 2 )
station will have a flashing intercom lamp.
The intercom audible signal at the called station
will be blocked.
(4) When called station answers, the flashing
lamp goes steady and the audible signal is
silenced.
possible.
(5) When both stations restore their handsets,
the link returns to normal and both lamps
go dark.
With a talking circuit established as in
4.03
4.02(4), the intercom call can be placed on
station hold (S HOLD) by depressing the HOLD
key on the telephone set. The lamp at the calling
station will wink and the associated pickup button
will restore. S HOLD cannot be activated by the
following:
•
Calling stations before the called station
answers
•
Called station in consultation hold (C HOLD)
•
Intercom-only stations
•
Paging calls.
SUPERVISORY FLASH FEATURES
Consultation hold (C HOLD), call add-on
4.04
(CADD), and call transfer (XFER) are features
activated by breaking the calling party A lead using
the line switch.
the intercom call in the talk mode with the duration
of the flash from 275-ms to 1.5 seconds.
flash is too short, no action will take place, and
if too long, disconnect will occur.
To activate supervisory flash features·
4.05
Lamp
(a) Assume station 20 is talking to station 30
and station 20 flashes (either station could
initiate flash).
HOLD) as indicated by hold tone followed by
dial tone which is returned to station 20.
(b) Station 20 may now dial a third station
(assume station 40) for consultation. Station
30 does not hear the conversation.
ISS 1 , SECTION 5 1 8-4 1 1 - 1 00
Two-way private conversation is now
The flash must take place with
Station 30 is put on hold (C
If the
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