Page 140 of 394
Figure 50
QPC720 (Single Group cabling) for Multi Group systems with an echo canceller
QPC720
PRI Card
(Primary
reference)
REF1
J1
REF2
J2
D-CH
J5
LOOP
J3
T1
J4
RS232
J6
Note 1: Maximum cable distance from PRI card to DS-1 cross connect is 200 m (655 ft).
Note 2: Maximum cable distance from PRI card to LD-1 is 229 m (750 ft).
Note 3: QPC720 does not interface with NT8D04 Superloop Network Card.
553-3001-201
Standard 2.00
NT8D72 and QPC720 PRI card installation
NT8D79AA to PRI Card
(Secondary reference)
NT8D79AA
NT8D79AA
NT8D79AA
QCAD125
QCAD328A or
NTND26
QCAD124
QCAD128 or
QCAD133
Cabinet
I/O Panel
QCAD129
Cabinet
I/O Panel
September 2004
NT8D79AA
J1
QPC775
Clock
J2
Controller
0
J3
J1
QPC775
Clock
J2
Controller
J3
1
QPC757
or
J2
NT6D80
QPC414
J2
(Note 3)
Echo Canceller
QCAD133
T1
(Note 1)
RS232
RS232
22 AWG ABAM
LD-1
(Note 2)
DS-1
Cross-Connect
Terminal
C e n t r a l
O f f i c e
553-1392