NTAK792.0 MbPRI c ard Page483 of 544
Option11C and 11C Mini Technical Reference Guide
Digital PAD
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 may be country dependent, the software instructs the
NTAK79 to use different codes for each direction. The 32 digital pads
available are illustrated b elow. The values shown are atte nuation levels, i.e.
1.0dB is 1dB of loss and -1.0dB is 1db of gain.
Table 1 49
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