We are going to be deploying CUCM 6.x for about 100 users. We're considering a SIP ethernet trunk from our carrier (AT&T or PaeTec)
Anybody have any experience with these? How is the reliability?
And more importantly, they offer SIP trunks in G.711 or G.729. You get more concurrent calls per trunk with G.729 obviously, so the cost is less.
But I'm concerned about voice quality. Is the difference noticeable? I want the users (who are new to VoIP) to have a good experience, and clear call quality is very important.