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<p class="">I use this in my sip.conf for the Polycom phone that I have here.</p><p class=""><br></p><p class=""><br></p><p class="">[polycom]</p><p class="">type=friend</p><p class="">context=radio-control</p><p class="">secret=yoursupersecretPW</p><p class="">host=dynamic</p><p class="">dtmfmode=rfc2833               </p><p class="">username=polycom               </p><p class="">disallow=all</p><p class="">allow=ulaw                     </p><p class="">progressinband=yes         </p><p class="">transfer=no</p><div><br></div></div>