Is it possible to use g729 for voicemail access across the WAN using CUE ? My setup is as follows Site A ( CM cluster + IP Phones) - WAN - Site B ( CUE + SRST + IP Phones )
CUE doesnt support g729. What you can do is keep the CUE at site A, and use g729 for calls between two sites. You will need to configure transcoding on CME router at site A to transcode g729 calls (when people at Site B dials voicemail) to g711 and then send that call to CUE.