Nortel Networks 1000 - Manual (Page 879)

Architecture 879
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.
As the idle code and unequipped code can be country dependent, the
software instructs the NTBK50 to use different codes for each direction.
The 32 digital pads available are illustrated in
Table 372 "Digital pad
values and offset allocations" (page 879) . The values shown are
attenuation levels (1.0dB is 1 dB of loss and –1.0 dB is 1 dB of gain).
Table 372
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
Signaling interface
The signaling interface consists of the A07 DS-30X signaling controller.
This interface provides an 8 Kbps signaling link via the DS-30X timeslot
zero data bit zero. Messages are 3 bytes in length.
The Meridian 1 signaling interface consists of the A07 DS-30X signaling
controller. This interface provides an 8 Kbps signaling link via the DS-30X
timeslot zero data bit zero. Messages are 3 bytes in length.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
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