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<b>From</b>: "Eric Wieling" <EWieling@nyigc.com><br />
<b>Sent</b>: Friday, July 22, 2011 10:46 AM<br />
<b>To</b>: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users@lists.digium.com><br />
<b>Subject</b>: Re: [asterisk-users] Question about codec re-negotiation in asterisk 1.4.X</span><br />
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<p class="MsoNormal"><span style="font-family: "calibri","sans-serif"; color: #1f497d; font-size: 11pt;"> </span></p>
<p class="MsoNormal"><span style="font-family: "calibri","sans-serif"; color: #1f497d; font-size: 11pt;">Asterisk does not support changing codecs on the fly.</span></p>
<p class="MsoNormal"><span style="font-family: "calibri","sans-serif"; color: #1f497d; font-size: 11pt;"> </span></p>
<p class="MsoNormal"><b><span style="font-family: "tahoma","sans-serif"; font-size: 10pt;">From:</span></b><span style="font-family: "tahoma","sans-serif"; font-size: 10pt;"> asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] <b>On Behalf Of </b>Matteo Campana<br />
<b>Sent:</b> Friday, July 22, 2011 10:39 AM<br />
<b>To:</b> Asterisk Users Mailing List - Non-Commercial Discussion<br />
<b>Subject:</b> [asterisk-users] Question about codec re-negotiation in asterisk 1.4.X</span></p>
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<p class="MsoNormal">Hi all,</p>
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<p class="MsoNormal">I have a major issue with a codec renegotiation in an asterisk 1.4.33.1 setup, which leads me to ask a general question about asterisk 1.4.X codec negotiation: asterisk can support a re-negotiation of a codec "on the fly" through a re-Invite? If my SIP provider sends me a re-invite changing codec from g729 to g711, asterisk properly handle the matter?</p>
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<p class="MsoNormal">I see in the trace that asterisk responds 200 OK to the provider, but <span style="text-decoration: underline;">does not send the re-invite to the UAC, and stops to send rtp to the UAC</span>.</p>
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<p class="MsoNormal"><span style="font-family: "calibri","sans-serif"; color: #1f497d; font-size: 11pt;"> </span></p>
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I know 1.8.x can do this but. I don't think 1.4.x had the option. Check it out.<br />
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<p>exten => Process,1,Set(SIP_CODEC=ulaw)</p>
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<div id="divSignature">Thanks<br />
<br />
Bryant Zimmerman (ZK Tech Inc.)<br />
616-855-1030 Ext. 2003</div>
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