Nortel Networks 1000 - page 675

IP Line administration using OTM 2.2 Page 675 of 910
IP Line Description, Installation and Maintenance
4Click the Codec Options sub-tab. See Figure 229 on page 677.
Up to four codecs can be selected.
Note: The T.38 Fax and G.711 Clear Channel Fax codecs are not
counted in this limit.
The G.711 codec type is mandatory and is automatically selected.
5Under Codec Options, the following parameters are user-configurable
on a per-codec basis:
Note: Leave the values at their default settings unless directed to change
them as follows or by Nortel Field Support.
a. Law type: The law type is applicable to G.711 only. The default is
mu-law.
b. Voice Activity Detection: The default is VAD disabled.
The VAD value is stored in the Config.ini file under the entry
VadEnabled=
VAD is not supported for G.711.
Voice activity detection
threshold
–20 to +10 dB –17 dB
Enable V.25 FAX/Modem
tone detection
checked or unchecked checked
Enable V.21 FAX tone
detection
checked or unchecked checked
FAX maximum rate 2400, 4800, 7200, 9600,
12000, 14400 bps
14400 bps
FAX playout nominal delay 0 – 300 ms 100 ms
FAX no activity timeout 10 – 32000 seconds 20 seconds
FAX packet size 20 – 48 bytes 30 bytes
Table 78
DSP parameters (Part 2 of 2)
Parameter Range Default value