On Wed, Jan 19, 2011 at 11:32 AM, Matthew Kitchin (public/usenet) <[email protected]> wrote: > Maybe this has been discussed, or I'm missing something obvious. > I built my corporate system on 4.0.4. I wanted to use G722 internally, > G729 for external, and the ability to renegotiate to G711 if ITSP > (Verizon requested it). > Verizon doesn't do G722, so simply putting the codecs at the phone group > to 722, 729, then 711 worked perfectly. > We upgraded to 4.2.1 a month or so ago. We started going over our > allotted bandwidth on our VOIP circuit and dropping calls. After looking > at a wireshark, I saw that all calls were using G711. > I poked around and found this new (I think it is new) feature: > Devices, SBC Routes, sipXbridge-1, SIP, Show Advanced Settings > ,Permitted Codecs > The default setting was "PCMU,PCMA,G722,L16"
Those are free-switch supported default codecs. If you pick G729, MOH may not work for certain ITSPs that return only the negotiated codec for In-dialog INVITE(no SDP). This is actually an error but some ITSPs do it. > On a test machine, I blanked this field, and now calls are using G729 as > expected. > If I understand it correctly, the upgrade puts in a default setting that > will not allow sipXbridge to use G729. If that is the case, wouldn't the > safer thing been to leave that field blank and maybe advise the user of > the new feature? Am I correct that blanking out that field should make > sipXbridge behave more like 4.0.4 with respect to codec negotiation? > > Thanks as always, > Matthew > _______________________________________________ > sipx-users mailing list > [email protected] > List Archive: http://list.sipfoundry.org/archive/sipx-users/ > -- M. Ranganathan _______________________________________________ sipx-users mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-users/
