After one-day reading, I am still not clear about how to configure codec and transcoding when integrating CCM and CCME.
Router and DSP resource are unknown
one 2821 router with CCME 4.1, CUE 3.1, DSP-PVDM2-32, and a T1 PRI to PSTN. This CCME router register as H.323 gateway in CCM.
one 2821 router for site-site IPSec VPN and Internet access. Inter-site VoIP calls go through this router.
Only G.711 is currently used in the whole environment. The reserved bandwith can support four G.711 inter-site calls. No gatekeeper and CAC are configured. Inter-site VoIP calls have dropped sometime. There is no problem with PSTN calls.
I am thinking to change the codec of inter-site calls to G.729 so that more calls can be supported.
Here are my questions:
1. How can I configure g.729 codec in both sites? In each device, gateways, CallManager?
2. Obviously, transcoding is needed, should transcoding resource be available in both of centeral and remote site? How is it be configured?