AT&T AT&T manual On-Premises Single-Line Voice Terminal Connections

SYSTEM 25

CABINET

ZTN78

OR

TN742

LEGEND:

PART OF

OCTOPUS

CABLE

— — —

C2

●

— — —

— — —

— — —

PART OF

SIP

SIP

ADAPT.

W1

B1

C5

SINGLE-LINE

VOICE

TERMINAL

(NOTE)

ZTN78 – TIP RING CP

TN742 – ANALOG LINE CP

B 1 – 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*

NOTE : 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

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