Nortel Communication Server 1000S Installation And Configuration Manual page 131

Figure 41
NT8D72(Half Group cabling) on Half and Single Group systems without an echo canceller
NT8D72AA
PRI Card
(Primary reference)
REF1
REF2
D-CH
LOOP
2Mb
stream
RS-232
Note 1: Maximum cable distance from PRI card to cross connect is 200 m (655 ft) .
Note 2: Maximum cable distance from PRI card to repeater is 229 m (750 ft).
NT8D72 and QPC720 PRI card installation
NT8D79AA
J1
J2 No connection
QCAD328A
J5
NT8D85AB
J3
J4
Cabinet
I/O Panel
(Note 1)
J6
No connection
ISDN Primary Rate Interface
NT8D79AA to PRI Card
(Secondary reference)
No connection
NT8D7205
Cross-Connect
Terminal
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J1
QPC471
Clock
J2
Controller
0
J3
QPC757
J2
DCHI
Network
J2
Card
repeater
(Note 2)
DS-1
553-1389
Installation and Configuration