Nortel Communication Server 1000S Installation And Configuration Manual page 139

Figure 49
QPC720 (Single Group cabling) for Multi Group systems without an echo canceller
QPC720
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).
Note 3: QPC720 does not interface with NT8D04 Superloop Network Card.
NT8D72 and QPC720 PRI card installation
NT8D79AA
NT8D79AA
J1
NT8D79AA
J2
QCAD328A
J5
NT8D85AB
J3
NT8D7207
J4
I/O Panel
J6
No connection
ISDN Primary Rate Interface
NT8D79AA to PRI Card
(Secondary reference)
NT8D79AA
QCAD125
J2
J2
NT8D7205
Cabinet
(Note 1)
Page 139 of 394
J1
QPC775
Clock
J2
Controller
J3
0
J1 QPC775
Clock
J2
Controller
J3
1
QPC757
DCHI
Network
Card
(Note 3)
repeater
(Note 2)
DS-1
Cross-Connect
Terminal
553-1391.1
Installation and Configuration