Nortel Networks Circuit Card 311 User Manual
Page 936
936
NTAK79 2.0 Mb PRI card
PAD SET 0
PAD SET 1
Offset
PAD
Offset
PAD
5
5.0 dB
5
–5.0 dB
6
6.1 dB
6
–6.0 dB
7
7.0 dB
7
–7.0 dB
8
8.0 dB
8
–8.0 dB
9
9.0 dB
9
–9.0 dB
10
10.0 dB
10
–10.0 dB
11
11.0 dB
11
spare
12
12.0 dB
12
spare
13
13.0 dB
13
spare
14
14.0 dB
14
Idle Code
15
spare
15
Unassigned Code
Software selects A-law or Mu-Law and one of 32 possible PAD values
for each channel. These values are provided in a PROM through which
the data is routed. The idle code for A-law is 54H and for Mu-law is 7FH.
The unequipped code is FFH for both A-law and Mu-law. As the idle code
and unequipped code may be country dependent, the software instructs
the NTAK79 to use different codes for each direction. The 32 digital pads
available are illustrated below. The values shown are attenuation levels, that
is 1.0dB is 1dB of loss and -1.0dB is 1db of gain.
Table 388
Digital Pad - values and offset allocations
PAD SET 0
PAD SET 1
Offset
PAD
Offset
PAD
0
0.6 dB
0
0.0 dB
1
1.0 dB
1
-1.0 dB
2
2.0 dB
2
-2.0 dB
3
3.0 dB
3
-3.0 dB
4
4.0 dB
4
-4.0 dB
5
5.0 dB
5
-5.0 dB
6
6.1 dB
6
-6.0 dB
7
7.0 dB
7
-7.0 dB
8
8.0 dB
8
-8.0 dB
9
9.0 dB
9
-9.0 dB
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.