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Figure 38
PRI to Echo Canceller cabling
QPC720
XTIP
1
XRING
9
GRD (Shield)
2
RTIP
3
RRING
11
GRD (Shield)
4
J4
PRI
J6
RXD (BB)
2
TXD (BA)
5
DCD (CF)
1
DTR (CD)
4
GRD (AB)
10
QCAD129 Cable
Echo Canceller for all systems
Cross-Connect
Block
I/O Filter
Echo Canceller
T1
Port
(If equipped)
3
RXD
2
TXD
8
DCD
RS232
Jack
20
DTR
7
GND
5
CTS
4
RTS
I/O Filter
Optional
Cross-Connect
Block
Page 155 of 188
NCTE
(if reqd)
Network
553-1504
ISDN PRI
Installation
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