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<p class="MsoNormal">Joshua helped answer some questions on the asterisk-users list.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">With Cisco switch, we’ve encountered a problem where Cisco does not send NOTIFY subscription updates if the Supported header includes norefersub.<o:p></o:p></p>
<p class="MsoNormal">Cisco is not handling this correctly, but getting Cisco (or any of the large switch vendors) to fix their bugs is impossible.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In Asterisk, chan_sip we are able to perform REFER (transfer) with Cisco. SIP debugging shows chan_sip does not include the norefersub.<o:p></o:p></p>
<p class="MsoNormal">The easy solution is for us to keep using chan_sip and not PJSIP. However, PJSIP is much better overall and chan_sip is basically deprecated.<o:p></o:p></p>
<p class="MsoNormal">We really want to stop using chan_sip for some systems, but we can’t without PJSIP handling all these.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m wondering if any asterisk developers can provide more insight on including the norefersub in the res_pjsip_refer when the load module?<o:p></o:p></p>
<p class="MsoNormal">Is this setting really needed?<o:p></o:p></p>
<p class="MsoNormal">If setting needs to remain, how difficult would it be to write code to make this setting configurable?<o:p></o:p></p>
<p class="MsoNormal">In our use case, we need to REFER calls to Cisco endpoint. However, Cisco will not REFER calls to us.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Have a great day!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dan<o:p></o:p></p>
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