Pri To Echo Canceller Pin Assignments; Electromagnetic Interference - Nortel 1000 Installation And Commissioning Manual

192 Echo canceller installation
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PRI to Echo canceller pin assignments

The echo canceller is controlled by an RS-232 port on the PRI circuit pack.
The following tables give the echo canceller pin assignments, operating
parameters and initialization procedures.
See
PRI-to-Echo canceller pin assignments; refer to
canceller cabling" (page 193)
Table 70
PRI-to-Echo canceller - pin assignments
Signal
TXD
(Transmitted Data)
RXD
(Received Data)
RTS
(Request to Send)
CTS
(Clear to Send)
Common Return
(signal ground)
DCD
(received line signal detector)
DTR
(data terminal ready)

Electromagnetic Interference

The Electromagnetic Interference (EMI) filter assembly for PRI is PO643763.
The system meets FCC Part 15, Subpart J, Class A requirements regarding
EMI. In order to accomplish this, the SDI cables must exit the cabinet
through EMI filters on the I/O panel. This procedure depends on the system
cabinet type.
Copyright © 2003-2007, Nortel Networks
.
Canceller only: OFF
H reset: OFF
H hold: OFF
Table 70 "PRI-to-Echo canceller - pin assignments" (page 192)
PRI pin
5
2
—
—
10
1
4
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
Figure 75 "PRI to echo
for a PRI-to-Echo-canceller cabling schematic.
Echo canceller
pin
2
3
4
5
7
8
20
for
EIA RS-232-C
circuit
designator
BA
BB
CC
CB
AB
CF
CD