Hi Guillermo, Thank you for your response. I wish understood more, but let me tell what I know and ask you another question. My (voice) ISP only supports “ULaw, ALaw, GSM and G729a” My phones are all Cisco504G’s. They support “G711u, G711a, G729a, G722, G726-16 (-24, -24 and -32). Then there are 2 other items that must be relevant: “DTMF Process AVT: Yes or No” and “DTMF Tx method: Inband, AVT, Info, Auto, Inband + Info, AVT + Info” I think Tx Method defaulted to AVT+Info as I got warnings about receive DTMF in INFO on FS. I am set to AVT and DTMF is working fine. Here is what I think (I would know, but it may not be correct) about codecs: G711u = ULaw, G711a=ALaw, The phones don’t seem to support GSM (?) and my VISP doesn’t support 722 or any 726. So that leaves me with G711a, G711u, G729. I have abundant bandwidth everywhere involved. I know G729 is fairly high quality compression with regard to bandwidth vs audio quality. I also know I have to get a license for each G729 channel on FS for about $10 each. I do not understand the difference in G711u and G711a. What is my best choice for DTMF Tx Method? And codec? Thank you for your time. Sean From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Guillermo Ruiz Camauer Sent: Wednesday, May 21, 2014 7:53 PM To: FreeSWITCH Users Help Subject: Re: [Freeswitch-users] IVR codec issue (I think) If possible, try to use RFC-2833 for the DTMF and you shouldn't have any codec problems. 711u is only required if you are doing INBAND DTMF. Guillermo On Wed, May 21, 2014 at 6:35 PM, Ian McMaster <ian.mcmaster@gmail.com<mailto:ian.mcmaster@gmail.com>> wrote: Try: export data="absolute_codec_string=PCMU" before the answer in the dialplan. After answer, the codec is already established. Ian. On Wed, May 21, 2014 at 5:22 PM, Sean Devoy <sdevoy@bizfocused.com<mailto:sdevoy@bizfocused.com>> wrote: [cid:image001.gif@01CF7533.E75C4700] HI Everybody! I had a recent problem where a transferred call’s audio was highly degraded. The cause was identified as mismatched codecs – thanks again. Today, I have a VERY VERY similar problem. The difference is that the first step is an IVR, not the receptionist. How do I set the CODEC for an incoming call to 711u when it is routed to an IVR. Thanks, Sean _________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org<mailto:consulting@freeswitch.org> http://www.freeswitchsolutions.com FreeSWITCH-powered IP PBX: The CudaTel Communication Server http://www.cudatel.com Official FreeSWITCH Sites http://www.freeswitch.org http://wiki.freeswitch.org http://www.cluecon.com FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org<mailto:FreeSWITCH-users@lists.freeswitch.org> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org _________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org<mailto:consulting@freeswitch.org> http://www.freeswitchsolutions.com FreeSWITCH-powered IP PBX: The CudaTel Communication Server http://www.cudatel.com Official FreeSWITCH Sites http://www.freeswitch.org http://wiki.freeswitch.org http://www.cluecon.com FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org<mailto:FreeSWITCH-users@lists.freeswitch.org> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org -- Guillermo Ruiz Camauer
