Take a packet capture and look at the Polycom's SDP. It will be listed in the 'a=rtpmap' if iLBC is available.
My bet is that you will only see: a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 -------------------------------------------------- Salvatore Giudice [EMAIL PROTECTED] VoIP Security Training, LLC http://VoIPSecurityTraining.com 848 N. Rainbow Blvd. #1676 Las Vegas, NV 89107 Phone: (617) 959-7625 Fax: (214) 279-2906 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Schall Sent: Wednesday, May 02, 2007 5:30 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Calls in ulaw, not gsm as desired I see this. However, ulaw works fine. I believe alaw works as well. So I don't think their site is either correct, or they didn't mean it like that. Rob Jerry Jones wrote: > A simple glance at their website will tell you this about the 501 > > " G.711 μ/A and G.729A (Annex B) configuration " > > > > On May 2, 2007, at 12:22 PM, Jaswinder Singh wrote: > >> Try ilbc if the phone supports (free) or g729 ( better but your >> asterisk will need license if you want to transcode calls from g729 >> to other codecs or want to record calls ) . Also check your phones >> config if its support multiple codecs . . >> >> On 02/05/07, Rob Schall <[EMAIL PROTECTED]> wrote: >> So I reloaded things and had just gsm set for 2 of my polycom 501 >> phones. However, the logs say "No codec found", which leads me to >> believe that polycom 501 phones can't use gsm. Does anyone have >> something like this working? If not gsm, is there a better option >> with these phones over a low bandwidth situation? >> > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users