Nortel Networks Circuit Card 311 User Manual
Page 937
Architecture
937
PAD SET 0
PAD SET 1
Offset
PAD
Offset
PAD
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 can be country dependent, the software instructs
the NTAK79 to use different codes for each direction. The 32 digital pads
available are listed in
Table 389 "Digital pad values and offset allocations"
. The values shown are attenuation levels; 1.0 dB is 1 dB of loss
and –1.0 dB is 1 dB of gain.
Table 389
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
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
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.