There are two necessary audio transcoders for the two different modules.
For MCU module, you need to use IPVC-3540-XAM06(This audio transcoder is for a 60-session MCU module) or IPVC-3540-XAM03 (for 30-session MCU).
- Without the Audio Transcoder card you will only be able to handle G.711 Audio. Advantages of the Audio Transcoder card are that it allows you to transcode from G.711 to the following audio codecs.
The IP/VC 3540 audio transcoder modules for the MC03A and the MC06A provide the following features:
= Translates to G.722 codec
= Translates to G.723 codec
= Translates to G.728 codec
= Translates to G.729 codec
= Translation for up to 30 ports simultaneously used in CP.
For the GW2P(GW module), you need to use IPVC-3540-XAG.
hope this helps.