<div dir="ltr"><div>Tony,</div><div>Are you seeing a complete SIP dialog between Asterisk and CUCM when making the calls from Asterisk towards the phone? Are the IPs and ports advertised in the SDP correct?</div><div><br></div><div>I would start by taking a packet capture at the gateway or asterisk to see if 2 way RTP is flowing between them. If you enable MTP then you can also enable a pcap on the CUCM where the MTP is located. <br></div><div>This would help isolate where the packets are being lost. <br></div><div><br></div><div>Regards</div><div>Sreekanth<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 5 July 2018 at 10:52, Tony Kasule <span dir="ltr"><<a href="mailto:timotsmith@gmail.com" target="_blank">timotsmith@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra">Dear Friends,</div><div class="gmail_extra"><br></div><div class="gmail_extra">I have CUCM 11 and Cisco gateway at my organisation where I am trying to add a small asterisk call center. </div><div class="gmail_extra"><br></div><div class="gmail_extra">I created a SIP trunk between CUCM and Asterisk 15.4 on Centos 7 and also did the same at the gateway. When I call from the PSTN to a dial-peer that is mapped to asterisk, the call goes through well and we each each other. However, when I call from asterisk to the PSTN, The call goes through but there is total silence.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Same issue with asterisk-CUCM. When I call from the Call manager to asterisk, its fine but asterisk to cisco extension, there is no audio on answering the call.</div><div class="gmail_extra"><br></div><div class="gmail_extra">I have been perplexed by this scenario. I extensively read online, turned MTP on and off (at the sip trunk in CUCM), tried nat=yes and nat=no at asterisk side etc but no joy yet.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Has anyone else experiences this and any pointers on how to have it resolved?</div><div class="gmail_extra"><br></div><div class="gmail_extra">Thank you so much.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Timothy</div></div>
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