thank you Ryan, i have no problem with sip and it is ok (although i do not know it has MTP or not). i think transcoder may not needed because as i know, it translate two different codecs to each other but in my scenario, both side uses g711alaw. please let me know if i misunderstand it.
On Mon, May 11, 2015 at 11:31 AM, Ryan Huff <[email protected]> wrote: > The reason that is happening is due to media negotiation failure as you > mention (both call legs are not offering the same codec capabilities). In > that exact configuration, you would need a transcoder (which you could run > on the router if you have enough DSP). > > Are you sold on h323 or can you do a full SIP trunk (with MTP) between > cucm and asterisk? > > Thanks, > > Ryan > > > -------- Original Message -------- > From: s m <[email protected]> > Sent: Monday, May 11, 2015 12:25 AM > To: Ryan Huff <[email protected]> > Subject: Re: [cisco-voip] how codec transparent works? > CC: [email protected] > > hello Ryan, > > thank you for your reply. without codec transparent, my phone rings but > when i answer i have no voice and it hangs up after 5 seconds. asterisk > says "no answer". this is so strange for me. i think media negotiation > failed, right? is there any hint to have h323 trunk to asterisk with > specific codec (not transparent one)??? > > On Sun, May 10, 2015 at 4:32 PM, Ryan Huff <[email protected]> wrote: > >> Codec transparent just passes sdp through to the other call leg without >> trying to do media negotiations. >> >> So without codec transparent, what happens? >> Thanks, >> >> Ryan >> >> >> -------- Original Message -------- >> From: s m <[email protected]> >> Sent: Sunday, May 10, 2015 01:19 AM >> To: [email protected] >> Subject: [cisco-voip] how codec transparent works? >> >> hello everybody, >> >> anybody knows how codec transparent works? >> >> i have a strange problem. i want to set h323 trunk between asterisk and >> cisco 2800. it only works when i set codec transparent in dial-peer nodes. >> show commands in cisco shows that i have a call with g711alaw but if i set >> codec g711alaw in dial-peers, i do not have any success call. i know it is >> codec compatibility problem. is there any difference between g711 codecs >> which cisco and asterisk utilize? what happened when codec is set to >> transparent? dose anyone know anything about it? >> >> thanks is advance >> SAM >> > >
_______________________________________________ cisco-voip mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-voip
