Nortel Communication Server 1000S Installation And Configuration Manual page 238

Page 238 of 394
Figure 75
PRI to echo canceller cabling
Dis
Act
Red
Yel
LBk
P R I
J1 Ref 1
J1 Ref 2
J4
J5
J3 Net Loop
J6
S
SER
A
QPC720
PRI
553-3001-201 Standard 2.00
Echo canceller installation
XTIP
1
XRING
9
GRD (Shield)
2
RTIP
3
RRING
11
GRD (Shield)
4
J4
J6
RXD (BB)
2
TXD (BA)
5
DCD (CF)
1
DTR (CD)
4
GRD (AB)
10
QCAD129
September 2004
I/O Filter
(if equipped)
3
2
8
20
7
5
4
I/O Filter Optional
cable
Cross-
Echo
Connect
Canceller
Block
T1
Port
RXD
TXD
DCD
DTR
GND
CTS
RTS
Cross-
Connect
Block
NCTE
(if required)
Network
RS-232
Jack
553-1504