AT&T BCM50 manual Media Parameters, Payload Size

AT&T IP Flexible Reach Service

Nortel BCM50 Release 3.0 SIP Configuration Guide

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:

•	1st Preferred Codec:	G.729*
•	2nd 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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