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SYSTEM 25
CABINET
PART OF
OCTOPUS
PART OF
CABLE
SIP
ZTN78
———
SINGLE-LINE
C2
SIP
W1
C5
OR
VOICE
●
B1
TN742
ADAPT.
TERMINAL
———
(NOTE)
———
———
LEGEND:
ZTN78 – TIP RING CP
TN742
– ANALOG LINE CP
NOTE :
B1 – TYPICAL-103A CONNECTING BLOCK*
C2
- OCTOPUS CABLE (WP90780) - PEC 2720-05P
C5 –
MODULAR CORD (D4BU-87) FURNISHED WITH SET
W1 –
4 PAIR INSIDE WIRING CABLE*
RANGE LESS THAN 2000 FEET FROM SYSTEM CABINET, USE ZTN-78 CP.
RANGE MORE THAN 2000 FEET BUT LESS THAN 1300 OHMS
†
(LOOP RESISTANCE)
FROM SYSTEM CABINET, USE TN742 CP. FIVE SINGLE-LINE VOICE
TERMINALS CAN BE BRIDGED WHEN USING A TN742 CP, HOWEVER, ONLY TWO
MAY BE OFF-HOOK AT ONE TIME.
* FURNISHED BY INSTALLER
† - INCLUDES TELEPHONE/TERMINAL
Figure 4-21. On-Premises Single-Line Voice Terminal Connections
4-52