AT&T System 25 - Manual (Page 147)

INSTALLATION
INSTALL EXTERNAL ALERTS
External
54).
1.
2.
3.
alerts are connected to the system through a ZTN78 CP (Figure 2-
Connect the CP to a 858A Adapter at the SIP.
Connect the other side of the adapter to a 103A Connecting Block
using building wiring.
Connect the block and alerting device with a D4BU cord.
LEGEND :
TN742 - ANALOG LINE CP
ZTN78 - TIP RING CP
B 1- TYPICAL - 103A CONNECTING BLOCK
C2 - OCTOPUS CABLE ( WP90780 )
C5 - MODULAR CORD ( D4BU-87 )
R1 - ElCM-50 RINGER OR EQUIVALENT
W1 - INSIDE WIRING CABLE
Figure 2-54. External Alerts
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