Owner's manual

878 NTBK50 2.0 Mb PRI card
Table 370
Digital Pad - values and offset allocations (cont’d.)
PAD SET 0 PAD SET 1
Offset
PAD
Offset
PAD
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 NTBK50 to use different codes for each direction.
The 32 digital pads available are illustrated in Table 371 "Digital Pad
- values and offset allocations" (page 878). The values shown are
attenuation levels (1.0dB is 1dB of loss and -1.0dB is 1db of gain).
Table 371
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
14
14.0 dB
14
Idle Code
15
spare
15
Unassigned Code
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.