SECTION
S
12-630- 1 1 1
TABLE A
POLARITY GUARD AND S3A CORD CONNECTIONS
TO MODIFY 2500S TELEPHONE SET
REMOVE
LEAD
COLOR
FROM
NET.
Line
w
c
Switch
Dial
G-W
c
BK
RR
Polarity
w
Guard
G
S3A
w
-
Cord
BL
-
R
-
•
Holder, 54A (microphone desk stand) (2).
2.04
Replaceable Common Components of
73B Control Unit:
•
840695142 Microphone and Front Housing
Assembly
•
Key, 635BJ5
•
840284152 Rear Housing Assembly
•
Ringer Assembly, P1B.
2.05
Associated Optional A p p a ratus o r
Equipment
(Required for auxiliary dial):
•
Set, Telephone, 25008
•
Cord, S3A
•
819040528 (P-90D052) Guard Assembly.
B.
Design Features
2.06
The 50A1 conference set is equipped with a
TRIMLINE® hand telephone set and provides
the following:
•
Hands-free conference communication using
any combination of the three microphones
and a loudspeaker with output signal level
adjustment
•
2- or 4-wire operation
Page
2
NET.
c
RR
-
Ll
L2
CONNECT TO
POLARITY
TERM.
GUARD
BOARD
s
s
T
-
1
•
Handset communication using a TRIMLINE
hand telephone set
•
Transferring between hands-free and handset
during conversation
•
One-way communication using the loudspeaker
only
•
A-lead control for use with key telephone
systems
•
Means to provide audible TOUCH-TONE®
signals for computer data input
•
Means to connect both transmitted and
received signals to a public address system
with output signal level adjustment
•
Lighted OFF key lamp to indicate when
the set is in operation.
C. Application
2.07
This set can be used on individual or bridged
service on CO or PBX line circuits with
1A1, 1A2, or 6A key telephone systems where
A-lead control is provided. It may also be used
with 1A KTS where connection to tip and ring
only are required.
3.
INSTALLATION AND CONNECTIONS
3.0 1
Terminate incoming telephone line on 625C
connecting block or equivalent. Place control
SSP S12-630-111-i02_1979-05.{)2.jpg Scanned by frank Harrell, (Cowboy frank) Castle Rock, Colorado Feb 16,2012 23:01:00
