Enterprise: Common; Solution Integration Guide For Multisite Business Communications Manager Systems; Nn49000-303 01.01 Standard - Nortel BCM200 Integration Manual

Field
Jitter buffer
G.729 payload size
(ms)
G.723 payload size
(ms)
G.711 payload size
(ms)
Incremental
payload size
Enable T.38 fax
Force G.711 for 3.1k
audio
Table 23
SIP Media Parameters fields
Field
Preferred Codecs

Solution Integration Guide for Multisite Business Communications Manager Systems

Copyright © 2007, Nortel Networks
.
Value
Auto
None
Small
Medium
Large
10,20,30,40,50,60
30
10,20,30,40,50,60
<check box>
<check box>
<check box>
Value
G.711 -uLaw
G.711 -aLaw
G.729

Enterprise: Common

NN49000-303 01.01 Standard

Release 4.0, 3.7 29 June 2007
Configuring VoIP trunk media parameters 55
Description
Select the size of jitter buffer for your system.
Set the maximum required payload size, per
codec, for the VoIP calls sent over H.323 trunks.
Note: Payload size can also be set for Nortel
IP telephones. See BCM 4.0 Telephony Device
Installation Guide (N0060609).
When enabled, the system advertises a variable
payload size (40, 30, 20, 10 ms).
When enabled, the system supports T.38 fax
over IP.
Caution: Fax tones broadcast through a
telephone speaker may disrupt calls at other
telephones using VoIP trunks in the vicinity of
the fax machine. To minimize the possibility of
your VoIP calls being dropped due to fax tone
interference:
• place the fax machine away from other
telephones
• turn the fax machine's speaker volume to the
lowest level, or off, if available
When enabled, the system forces the VoIP trunk
to use the G.711 codec for 3.1k audio signals,
such as modem or TTY machines.
Note: You also can use this setting for fax
machines if T.38 fax is not enabled on the trunk.
Description
Add codecs to the Selected list and order them
in the order in which you want the system to
attempt to use them. The system attempts to use
the codecs in a top-to-bottom sequence.