In a recent interview someone from Digum indicated that the G722 wideband codec was being worked into Asterisk. This will make Asterisk compatible with Polycom's new HDVoice products like the IP650 phone. This is very interesting, potentially exciting, but it brings up certain questions. Who will benefit as long as calls must typically pass into existing PSTN infrstructure, and so be transcoded into G.711? It seems to me that only systems that are IP end-to-end stand to show the improvements...or am I mistunderstanding? Michael Graves
>>>>> "MG" == Michael Graves <dickson@covad.net> writes:MG> Who will benefit as long as calls must typically pass into MG> existing PSTN infrstructure, and so be transcoded into G.711? It MG> seems to me that only systems that are IP end-to-end stand to show MG> the improvements...or am I mistunderstanding? ISDN can transport G.722. Can Digium PRI cards do G.722? /Benny
Benny Amorsen wrote:>>>>>> "MG" == Michael Graves <dickson@covad.net> writes: > > MG> Who will benefit as long as calls must typically pass into > MG> existing PSTN infrstructure, and so be transcoded into G.711? It > MG> seems to me that only systems that are IP end-to-end stand to show > MG> the improvements...or am I mistunderstanding? > > ISDN can transport G.722. Can Digium PRI cards do G.722?Still, I think his point is the weakest link still the PSTN hop, no matter where it will happen. If you had only VOIP end-to-end, G.722 would be good, but in any step going via PSTN (the PRI idea only solve one side of the PSTN call..unless you have the PRI in both ends of the call with G.722 ?) As people move forward into VOIP and peering, G.722 (and others) will come into play I guess, meanwhile, only for interoffice VOIP calls I guess ?