<div dir="ltr">I am trying to setup a PCMU conference call using either Blink Lite/and or a webRTC client. I have SDES on for RTP but NOT SSL for the SIP Channel. The audio coming from asterisk is fine, but it would appear that the audio going to Asterisk is not being decoded correctly and results in the conference recording being a giant ball of noise. Wireshark sees audio traffic in both directions, however, the conference channel says it doesn't receive any audio resulting in a recording with static.<div>
<br></div><div>There are two problems here, one , at the decode point of the incoming RTP stream, apparently the audio decode on the incoming asterisk side is failing silently, probably because of something to do with the decryption suite selection. Secondly, the conference channel thinks there is incoming audio, when there isn't and just records noise.</div>
<div><br></div><div>This happens on both Blink and webRTC. I am more concerned with the webRTC case.<br><div><br></div><div>Environment</div><div> Asterisk SVN-trunk-r379495M built by root @xxxx on a x86_64 on Fedora 18</div>
<div> Blink Lite on Mac OS/X</div><div> webRTC on Chrome Canary <font color="#303942" face="Lucida Grande, sans-serif"><span style="font-size:12px">Version 26.0.1390.0 canary</span></font><br clear="all"><div><div><br></div>
<div><br></div><div><div>INVITE sip:conf@starwars.local SIP/2.0</div><div>Via: SIP/2.0/UDP 10.173.107.233:52263;rport;branch=z9hG4bKPjAAeszOcFhHjIPFEYpJYhafDAYM.pEY4t</div><div>Max-Forwards: 70</div><div>From: "Govner Bad" <sip:guv@starwars.local>;tag=CllM3sPM7CH15pQedTmgTytpuNi-UJZO</div>
<div>To: <sip:conf@starwars.local></div><div>Contact: <<a href="http://sip:64295807@10.173.107.233:52263/" target="_blank">sip:64295807@10.173.107.233:52263</a>></div><div>Call-ID: peGYqLeBpNHjtN8Af2.pVfwHEA3zX6XX</div>
<div>CSeq: 1280 INVITE</div><div>Allow: SUBSCRIBE, NOTIFY, PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, MESSAGE, REFER</div><div>Supported: 100rel, replaces, norefersub, gruu</div><div>User-Agent: Blink Lite 2.0.1 (MacOSX)</div>
<div>Authorization: Digest username="guv", realm="starwars.local", nonce="5c41c128", uri="sip:conf@starwars.local", response="2a8636d66679731ceb858f077a1e821c", algorithm=MD5</div>
<div>Content-Type: application/sdp</div><div>Content-Length: 617</div><div><br></div><div>v=0</div><div>o=- 3567865409 3567865409 IN IP4 10.173.107.233</div><div>s=Blink Lite 2.0.1 (MacOSX)</div><div>c=IN IP4 10.173.107.233</div>
<div>t=0 0</div><div>m=audio 53946 RTP/SAVP 0 8 101</div><div>a=rtcp:59154</div><div>a=rtpmap:0 PCMU/8000</div><div>a=rtpmap:8 PCMA/8000</div><div>a=rtpmap:101 telephone-event/8000</div><div>a=fmtp:101 0-15</div><div>a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:8C4kwuFbwUE/+ufBZBlmOCiwfJ3lreAJzmNMUSeM</div>
<div>a=crypto:2 AES_CM_128_HMAC_SHA1_32 inline:9RLQwXBkzFlXUu9mpiXEcRSeASZA8/EV+Hrzr2KV</div><div>a=ice-ufrag:34d60893</div><div>a=ice-pwd:4fcd05fe</div><div>a=candidate:Haad6be9 1 UDP 2130706431 10.173.107.233 53946 typ host</div>
<div>a=candidate:Haad6be9 2 UDP 2130706430 10.173.107.233 59154 typ host</div><div>a</div></div><div><br></div><div><div style="font-family:arial,sans-serif;font-size:13px">SIP/2.0 200 OK</div><div style="font-family:arial,sans-serif;font-size:13px">
Via: SIP/2.0/UDP 10.173.107.233:52263;branch=z9hG4bKPjAAeszOcFhHjIPFEYpJYhafDAYM.pEY4t;received=10.173.107.233;rport=52263</div><div style="font-family:arial,sans-serif;font-size:13px">From: "Govner Bad" <sip:guv@<span style="font-family:arial;font-size:small">starwars</span>.local>;tag=CllM3sPM7CH15pQedTmgTytpuNi-UJZO</div>
<div style="font-family:arial,sans-serif;font-size:13px">To: <sip:conf@<span style="font-family:arial;font-size:small">starwars</span>.local>;tag=as2e1a60c2</div><div style="font-family:arial,sans-serif;font-size:13px">
Call-ID: peGYqLeBpNHjtN8Af2.pVfwHEA3zX6XX</div><div style="font-family:arial,sans-serif;font-size:13px">CSeq: 1280 INVITE</div><div style="font-family:arial,sans-serif;font-size:13px">Server: BSLocal</div><div style="font-family:arial,sans-serif;font-size:13px">
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH</div><div style="font-family:arial,sans-serif;font-size:13px">Supported: replaces, timer</div><div style="font-family:arial,sans-serif;font-size:13px">
Contact: <<a href="http://sip:conf@10.173.107.240:5060/" target="_blank">sip:conf@10.173.107.240:5060</a>></div><div style="font-family:arial,sans-serif;font-size:13px">Content-Type: application/sdp</div><div style="font-family:arial,sans-serif;font-size:13px">
Content-Length: 567</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">v=0</div><div style="font-family:arial,sans-serif;font-size:13px">o=root 1094504443 1094504443 IN IP4 10.173.107.240</div>
<div style="font-family:arial,sans-serif;font-size:13px">s=BSLocal</div><div style="font-family:arial,sans-serif;font-size:13px">c=IN IP4 10.173.107.240</div><div style="font-family:arial,sans-serif;font-size:13px">t=0 0</div>
<div style="font-family:arial,sans-serif;font-size:13px">m=audio 18186 RTP/SAVP 0 101</div><div style="font-family:arial,sans-serif;font-size:13px">a=rtpmap:0 PCMU/8000</div><div style="font-family:arial,sans-serif;font-size:13px">
a=rtpmap:101 telephone-event/8000</div><div style="font-family:arial,sans-serif;font-size:13px">a=fmtp:101 0-16</div><div style="font-family:arial,sans-serif;font-size:13px">a=silenceSupp:off - - - -</div><div style="font-family:arial,sans-serif;font-size:13px">
a=ptime:20</div><div style="font-family:arial,sans-serif;font-size:13px">a=ice-ufrag:2a8bd4ba1e58c3847aa9d5a03d73d61a</div><div style="font-family:arial,sans-serif;font-size:13px">a=ice-pwd:08c4a4c228aa018108b48ffe5a565e4a</div>
<div style="font-family:arial,sans-serif;font-size:13px">a=candidate:Haad6bf0 1 UDP 2130706431 10.173.107.240 18186 typ host</div><div style="font-family:arial,sans-serif;font-size:13px">a=candidate:Haad6bf0 2 UDP 2130706430 10.173.107.240 18187 typ host</div>
<div style="font-family:arial,sans-serif;font-size:13px">a=sendrecv</div><div style="font-family:arial,sans-serif;font-size:13px">a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:2lSCjAPw1OeCb1w67J6FNHV0VxPO2F4yeh1CdPWd</div><div class="" style="margin:2px 0px 0px;font-family:arial,sans-serif;font-size:13px">
</div></div></div><div><br></div><div><div>[sip.conf]</div><div>nat=no</div><div>icesupport=yes</div><div>directmedia=yes</div><div>directmedia=nonat</div><div>encryption=yes</div><div>encryption_taglen=80</div><div>avpf=yes</div>
<div><br></div><div>[rtp.conf]</div><div>icesupport=yes</div><div><br></div><div>[users.conf]</div><div><br></div><div>[guv]</div><div>type=peer</div><div>username=guv</div><div>host=dynamic</div><div>secret=password</div>
<div>context=educateonline</div><div>hasiax = no</div><div>hassip = yes</div><div>encryption = yes</div><div>avpf = no</div><div>icesupport = yes</div><div>videosupport=no</div><div>directmedia=yes</div><div>;stun=<a href="http://stun.l.google.com:19302">stun.l.google.com:19302</a> </div>
<div>transport=ws,udp</div><div>subscribemwi=no</div><div>hasvoicemail=no</div><div><br></div><div><br></div><div>[confbridge]</div><div>dsp_drop_silence=yes</div><div>denoise=yes</div><div>dtmf_passthrough=no</div></div>
<div><br></div><div><br></div><div><br></div>-- <br>"Don't stand still, if you see me running down the road, 'cause there is trouble right behind me".
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