Nortel Circuit Card 311 Reference page 978

978 NTBK50 2.0 Mb PRI card
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 NTBK50 to use different codes for each direction. The
32 digital pads available are illustrated in
offset allocations" (page
(1.0dB is 1dB of loss and -1.0dB is 1db of gain).
Table 406
Digital Pad - values and offset allocations
PAD SET 0
Offset
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
The 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.
Copyright © 2003-2008, Nortel Networks
.
978). The values shown are attenuation levels
PAD
0.6 dB
1.0 dB
2.0 dB
3.0 dB
4.0 dB
5.0 dB
6.1 dB
7.0 dB
8.0 dB
9.0 dB
10.0 dB
11.0 dB
12.0 dB
13.0 dB
14.0 dB
spare
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Table 406 "Digital Pad - values and
PAD SET 1
Offset
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Unassigned Code
PAD
0.0 dB
-1.0 dB
-2.0 dB
-3.0 dB
-4.0 dB
-5.0 dB
-6.0 dB
-7.0 dB
-8.0 dB
-9.0 dB
-10.0 dB
spare
spare
spare
Idle Code