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Nortel BCM50 Release 3.0 SIP Configuration Guide
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4.4 Media Parameters
Configuration Æ Resources Æ Telephony Resources:
Select module type “IP Trunks” and click on the “SIP Media Parameters”
tab. Within this screen; ensure that all values are exactly as the sample screen
shot shown below:
• 1
st
Preferred Codec: G.729*
• 2
nd
Preferred Codec: G.711-uLaw
• Voice Activity Detection: Disabled
• Jitter Buffer: Auto
• Fax transport: T.38 or G.711**
• G.729 Payload Size: 20
Figure 16: SIP Media Parameters
* For default configurations, G.729A codec will be used for voice calls. However,
in the case that G.729B needs to be configured instead of G.729A, ensure that
“Enable Voice Activity Detection” is checked.
** Depending on customer requirements, the fax transport can be T.38 or G.711
protocols—both are supported by the BCM50. Any analog lines that will be used
for fax should also have the following minimum setting (see figure below):
For customers requiring G.711 fax, the following procedure needs to be
executed: Under
Configuration Æ Telephony Æ Sets Æ All DNs
, select the
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