Nortel Circuit Card 311 Reference page 873

D-channel interface
The D-channel interface is a 64 Kbps maximum, full-duplex, serial bit-stream
configured as a DCE device. The data signals include receive data output,
transmit data input, receive clock output, and transmit clock output. The
receive and transmit clocks can vary slightly from each other as determined
by the transmit and receive carrier clocks.
Feature selection through software configuration for the D-channel includes:
•
•
•
DCHI can be enabled and disabled independent of the PRI card, as long as
the PRI card is inserted in its cabinet slot. The D-channel data link cannot
be established however, unless the PRI loop is enabled.
On the NTAK09 use switch 1 and position 1 to select either the D-channel
feature or the DPNSS feature, as follows:
•
•
Copyright © 2003-2008, Nortel Networks
.
Offset
3
4
5
6
7
8
9
A
B
C
D
E
F
56 Kbps
64 Kbps clear
64 Kbps inverted (64 Kbps restricted)
OFF = D-channel
ON = DPNSS (U.K.)
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
PAD set 0
4dB
5dB
6.1dB
8dB
-1dB
-3dB
-4dB
idle code, 7F
unassigned code, FF
1dB
-2dB
-5db
-6db
Architecture 873
PAD set 1
-10db
0.6db
7db
9db
10db
11db
12db
3db
14db
spare
spare
spare
spare