872 NTAK091.5 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-Lawto µ255, and
A-Law to A-Law. These values are selected to meet theEIA loss and level
plan.
Table356
Digital pad values and offset allocations
Offset PAD set 0 PAD set 1
00dB –7db
12dB –8db
23dB –9db
34dB –10db
45dB 0.6db
56.1dB 7db
68dB 9db
7–1dB 10db
8–3dB 11db
9–4dB 12db
A idle code, 7F 3db
B unassignedcode, FF 14db
C 1dB spare
D –2dB spare
E –5db spare
F –6db spare
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-lawcoding. There are 32 combinations
each for µ255 to µ255, µ255 to A-law, A-lawto µ255, and A-law to A-law.
These values are selected to meet the EIA loss and level plan.
Table357
Digital pad values and offset allocations
Offset PAD set 0 PAD set 1
00dB -7db
12dB -8db
23dB -9db
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.