On Tue, 15 Sep 2009, Steve Totaro wrote: > On Tue, Sep 15, 2009 at 5:09 AM, Gordon Henderson < > [email protected] <gordon%[email protected]>> wrote: > >> On Tue, 15 Sep 2009, Steve Totaro wrote: >> >>> Asterisk supports this codec in passthrough without buying anything and >> no >>> real hit on the CPU since no transcoding necessarily takes place. >>> >>> A world wide Asterisk system/network using all G729 from phones, to make >>> menuselect and selecting G729 sounds and getting a G729 >>> origniation/termination is a beautiful thing. >> >> Apart from MixMonitor, MeetMe and voicemail )-: >> >> And calls to GSM mobile phones where the transcode from G729 to GSM (via >> alaw in the PSTN) doesn't sound that good - even to me and I have rubbish >> ears... >> >> Gordon >> >> True enough, > > Luckily, I don't use mixmonitor in that deployment. voicemails are few and > far between in relation to call volume and meetme is only used regularly but > with very few participants. 3 way calling is usually sufficient.
Indeed. An I use g729 end to the PSTN plumbing where the transcode is done by someone else, so it's good in that respect. An issue I have is the low power PBXs I like to make & use for local voicemail though... > Would Nconference or whatever the drop in replacement to Meetme have G729 > issues. No idea - I'm under the impression (from earlier messages here) that you simply can't mix a compressed audio stream without uncompressing it first... > I guess the G729 to GSM depends on the provider. Using L3 or XO, I have > never really heard any issues. I've had a few compliants - mostly from the people at the far-end on the mobile... (cell, handy, whatever you want to call it) > On a double VSAT hop around the world with 10:1 or 20:1 contention on a > small pipe, yeah, I have heard audio problems but I know for a fact that > G729 is actually helping, not hurting. > > BTW, I do all SIP. I used to use all IAX, but an migrating to SIP and finally going to dump IAX on back-hauls shortly. (Probably still use it for office to office though) Gordon _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2009 - October 13 - 15 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
