Bell System Practices TOUCH-A-MATIC 2872A1M Identification, Installation, Connections, Operation, And Maintenance page 47

ISS 5, SECTION 503-603-101
(NOTE 2) = >(_ .
TIP
(NOTE 1) (G) PSB-4
PSB-8 PSB-13 I
. F-N_O_ -- -- RR !
I I
I I
POLARITY i I
GUARD I _.5MFt I
_ ®l
I®
533Kt
I I
i
yi
. .L1 __
PSB-S
RING PSB-5 (_
(NOTE 1)
(NOTE 3) (_
®l
* INSULATED AND STORED
t DIODE AND CAPACITOR ORDEREDAND INSTALLED SEPARATELY
(_WITHOUT RESTRICTED DIALING (FACTORY WIRED)
(_WITH RESTRICTED DIALING
NOTES:
I. REVERSE POLARITY ON TIP AND RING LEADS
ON ALL LINES WITH RESTRICTED DIALING
2. FOR 2872AIM SET - (Y)
FOR 2872A2M SET - (BL)
\
3. FOR 2872AIM SET - (BL)
FOR 2872A2M SET - (Y)
Fig. 14--1_2872A1M (MD) or 2872A2M Telephone Set, Connections for Restricted Dialing Option4
Page 47