Matrix Telecom SETU VTEP Configuration Manual page 15

b) Selecting Preferred Codecs
 Under Basic Settings on the left navigation bar, click the SIP Trunk link. The SIP Trunk
parameters page opens.
 Click Vocoder Preference to expand
 Set Vocoder preference. As 1st Preference and 2nd Preference, set either G.711 A-Law
or G.711 μ- Law.
 From the Selected Codecs list box, move all other codecs—GSM FR, iLBC 30ms, iLBC 20
ms, G.729— one by one, to the Available Codecs box, by selecting the codec, and then
clicking the BACK ARROW.
 Make sure only G.711 (A-law) and G.711 (μ- Law) remain in the Selected Codecs list
box. You may set one of these codecs as the First preference, by selecting it and using
the UP ARROW
 Click Submit to save
SETU VTEP configuration guide for Elastix
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