Nortel Circuit Card 311 Reference page 872

872 NTAK09 1.5 Mb DTI/PRI card
The digital pad is an EPROM whose address-input to data-output transfer
function meets the characteristics of a digital attenuator. The digital
pad accommodates both µ255-law and A-Law coding. There are 32
combinations each for µ255 to µ255, µ255 to A-Law, A-Law to µ255, and
A-Law to A-Law. These values are selected to meet the EIA loss and level
plan.
Table 356
Digital pad values and offset allocations
Offset
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
The digital pad is an EPROM whose address-input to data-output transfer
function meets the characteristics of a digital attenuator. The digital pad
accommodates both µ255-law and A-law coding. There are 32 combinations
each for µ255 to µ255, µ255 to A-law, A-law to µ255, and A-law to A-law.
These values are selected to meet the EIA loss and level plan.
Table 357
Digital pad values and offset allocations
Copyright © 2003-2008, Nortel Networks
.
PAD set 0
0dB
2dB
3dB
4dB
5dB
6.1dB
8dB
–1dB
–3dB
–4dB
idle code, 7F
unassigned code, FF
1dB
–2dB
–5db
–6db
Offset
0
1
2
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
PAD set 0
0dB
2dB
3dB
PAD set 1
–7db
–8db
–9db
–10db
0.6db
7db
9db
10db
11db
12db
3db
14db
spare
spare
spare
spare
PAD set 1
-7db
-8db
-9db