AT&T System 25 - Manual (Page 144)

INSTALLATION
Non-FCC Registered Music Source Interface
The music source is connected to a ZTN78 CP (see Figure 2-53). Connect
the CP to a 858A Adapter at the SIP.
Follow the instructions for installing FCC-registered equipment. You must
also install a kit-of-parts (D-181575; includes 36A Voice Coupler, 201213
transformer, and KS-23395 MOH interface). Follow the wiring instructions
included with the kit.
LEGEND:
TN742 - ANALOG LINE CP
ZTN78 - TIP RING CP
B 1- TYPICAL - 103A CONNECTING BLOCK
C2 - OCTOPUS CABLE ( WP90780 )
C6 - SINGLE-ENDED MODULAR CORD, D4BY
W1 - 4-PAIR INSIDE WIRING CABLE
Figure 2-53. Music Source, Non-FCC Registered
2-119