Bell System Practices TOUCH-A-MATIC 2872A1M Identification, Installation, Connections, Operation, And Maintenance page 45

ISS 5, SECTION 503-603-101
TOUCH-A-MATIC
TELEPHONESET
6-BUTTON LINE KEY
L MOUNTING
CORD
,o8- 1
TYPE |
LOUD | •
SPKR I / D20N-87
k22_
POWER | _ I
,,_(NOTE ,,
KS-21149L4fl
(_19
Icl 1 [ I J [
OPTION PLUG _ _ "
,N I
CUT-OFF I J--I /
MODE _ r_'"/
LINK / I Z
_3,./ 8z8
CONNECTING
__J BLOCK ___
1 D8S'87 I
r-o 1 j _o.o
I
|TYPE
_, I
A25B CABLE
[
- TO KEY TELEPHONE SYSTEM
{NOTE 2)
NOTES:
1. STRAP NECESSARY ONLY IF SET IS ALSO
EQUIPPED WITH DIAL TONE DETECTOR TO
PROVIDE ONE-TOUCH CALLING OPTION.
2. IF POWER IS PROVIDED THROUGH KEY CABLE,
USE (BR-V) PAIR FOR 85-TYPE POWER UNIT
AND STRAP 24 TO ACt AND 49 TO AC2 ON
82B CONNECTING BLOCK.
Fig. 12--Block Diagram--2872AIM (MD) or 2872A2M Telephone Set Using 4A Speakerphone
Page 45