978 NTBK50 2.0 Mb PRI card
Software selects A-law or Mu-Law and one of 32 possible PADvalues 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 availableare illustrated in Table406 "Digital Pad - values and
offset allocations" (page 978). The values shown are attenuation levels
(1.0dB is 1dB of loss and -1.0dB is 1db of gain).
Table406
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
14 14.0 dB 14 Idle Code
15 spare 15 Unassigned Code
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.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.