Architecture 937
PAD SET 0 PAD SET 1
Offset PAD Offset PAD
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
Software selects A-Law or Mu-Law and one of 32 possiblePAD 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 NTAK79to use different codes for each direction. The 32 digital pads
availableare listedin Table389 "Digital pad values and offset allocations"
(page 937). The values shown are attenuation levels; 1.0 dB is 1 dB of loss
and –1.0 dB is 1 dB of gain.
Table389
Digital pad values and offset allocations
PAD SET 0 PAD SET 1
Offset PAD Offset PAD
00.6 dB 00.0 dB
11.0 dB 1–1.0 dB
22.0 dB 2–2.0 dB
33.0 dB 3–3.0 dB
44.0 dB 4–4.0 dB
55.0 dB 5–5.0 dB
66.1 dB 6–6.0 dB
77.0 dB 7–7.0 dB
88.0 dB 8–8.0 dB
99.0 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
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.