Dears; I do not know if any had experience in using speex or ilbc with IAX and got good results, because I am facing a problem with GSM.
I am facing a noise problem when I am using GSM with IAX trunk as following: IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk using GSM codec ---> Remote Asterisk Box ---> Digium Card (FXO) to terminate the call to the destination While no noise happen if that senario is happening: IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk using GSM codec ---> Remote Asterisk Box ---> Digium Card (FXS) to an extension I tried to use GSM with IAX trunk, and actually I got a problem that: when I am using IP Phone (Polycom 320, with G711 codec) and placed a call, that call will go via the IAX trunk to the remote Asterisk Box, then using the Digium TDM22B card to terminate the call via the PSTN analoge lines, there is a noise coming with the voice! This noise does not appear if we do not use the "IAX trunk and if the call is not going to be terminated via the Digium Card (FXO) on the remote Asterisk Box (if we use IAX trunk and we call an extension (FXS) on a remote Asterisk but not the PSTN and the FXO on the remote Asterisk, then no noise appear). So the noise happen only in that senario: IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk using GSM codec ---> Remote Asterisk Box ---> Digium Card (FXO) to terminate the call to the destination While no noise happen if that senario is happening: IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk using GSM codec ---> Remote Asterisk Box ---> Digium Card (FXS) to an extension I do not know if it is a matter of the GSM codec, or if it is related to the digium card that it is the old model. But any one can advise if speex or ilbc will give better performance than GSM with IAX trunk? Any advise? Regards Bilal -------------------- bilal ghayyad wrote: > Hi List; > > Anyone tried to use speex, ilbc and g729 and come back > with a preferred one in the quality? > > Regards > Bilal > > > ____________________________________________________________________________________ > Never miss a thing. Make Yahoo your home page. > http://www.yahoo.com/r/hs > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > Depends on what you're using it for. We've had excellent luck with iLBC for voice quality and g729 as well. Speex is better than GSM, but not spectacularly. The problem with all of them of course, is transcoding. They have less of a bandwidth footprint for acceptable quality, but more of a processor footprint. N. _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
