{"type":"doc","content":[{"type":"paragraph","content":[{"text":"Asterisk server wrongly select audio codec which causes one-way audio issue. It could be clearly seen in the SIP log (please see example below). In the example below, instead of PCMU (0) which was negotiated, Asterisk is sending packets in PCMA (8). We believe this is connected to the bug in Asterisk version 13 which was mentioned on the forums, for example: ","type":"text"},{"type":"inlineCard","attrs":{"url":"https://community.asterisk.org/t/asterisk-13-13-codec-selection-possible-bug/69075"}},{"text":" ","type":"text"}]},{"type":"paragraph","content":[{"text":"To mitigate this","type":"text","marks":[{"type":"strong"}]},{"text":", we recommend disabling all the codes in Ringotel connection settings ","type":"text"},{"text":"except PCMU","type":"text","marks":[{"type":"strong"}]},{"text":". ","type":"text"}]},{"type":"mediaSingle","attrs":{"layout":"center"},"content":[{"type":"media","attrs":{"width":1180,"id":"fa983b73-9d6d-4855-ad40-de6bbb1cab62","collection":"contentId-2144632853","type":"file","height":277}}]},{"type":"paragraph","content":[{"text":"Alternatively, you can try setting identical codecs order in Ringotel connection and PBX settings.","type":"text"}]},{"type":"paragraph","content":[{"text":"Example:","type":"text","marks":[{"type":"underline"},{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"------ Outgoing call to sip:01510000000@voip.domain.net:5061;transport=tls -------------------------","type":"text"}]},{"type":"paragraph","content":[{"text":"17/06 XXX.X.XXX.XXX","type":"text"}]},{"type":"paragraph","content":[{"text":"INVITE sip:01510000000@voip.domain.net:5061;transport=tls SIP/2.0","type":"text"}]},{"type":"paragraph","content":[{"text":"Call-ID: d7762e90bfa148e37ea41f4bd4075a","type":"text"}]},{"type":"paragraph","content":[{"text":"Via: SIP/2.0/TLS XXX.X.XXX.XXX:5061;branch=z9hG4bKf322913afb602e71","type":"text"}]},{"type":"paragraph","content":[{"text":"From: \"Jim Smith\" ;tag=6588be27","type":"text"}]},{"type":"paragraph","content":[{"text":"To: \"01510000000\" ","type":"text"}]},{"type":"paragraph","content":[{"text":"CSeq: 2061 INVITE","type":"text"}]},{"type":"paragraph","content":[{"text":"Max-Forwards: 70","type":"text"}]},{"type":"paragraph","content":[{"text":"User-Agent: Ringotel Server","type":"text"}]},{"type":"paragraph","content":[{"text":"Supported: replaces","type":"text"}]},{"type":"paragraph","content":[{"text":"Contact: ","type":"text"}]},{"type":"paragraph","content":[{"text":"Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, UPDATE, REFER, INFO, SUBSCRIBE, NOTIFY, MESSAGE","type":"text"}]},{"type":"paragraph","content":[{"text":"Content-Type: application/sdp","type":"text"}]},{"type":"paragraph","content":[{"text":"Content-Length: 248","type":"text"}]},{"type":"paragraph","content":[{"text":"v=0","type":"text"}]},{"type":"paragraph","content":[{"text":"o=jim 1655472689 1 IN IP4 XXX.X.XXX.XXX","type":"text"}]},{"type":"paragraph","content":[{"text":"s=SIP Call","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"c=IN IP4 XXX.X.XXX.XXX","type":"text"}]},{"type":"paragraph","content":[{"text":"t=0 0","type":"text"}]},{"type":"paragraph","content":[{"text":"m=audio 43892 RTP/AVP 8 0 101","type":"text"}]},{"type":"paragraph","content":[{"text":"a=rtpmap:8 PCMA/8000","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"a=rtpmap:0 PCMU/8000","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"a=rtpmap:101 telephone-event/8000","type":"text"}]},{"type":"paragraph","content":[{"text":"a=fmtp:101 0-15","type":"text"}]},{"type":"paragraph","content":[{"text":"a=ptime:20","type":"text"}]},{"type":"paragraph","content":[{"text":"a=sendrecv","type":"text"}]},{"type":"paragraph","content":[{"text":"…","type":"text"}]},{"type":"paragraph","content":[{"text":"17/06 22.22.22.222 ","type":"text"}]},{"type":"paragraph","content":[{"text":"SIP/2.0 183 Session Progress","type":"text"}]},{"type":"paragraph","content":[{"text":"Call-ID: d7762e90bfa148e37ea41f4bd4075a","type":"text"}]},{"type":"paragraph","content":[{"text":"Via: SIP/2.0/TLS XXX.X.XXX.XXX:5061;rport=37421;branch=z9hG4bKf96003e8c181348f","type":"text"}]},{"type":"paragraph","content":[{"text":"From: \"Jim Smith\" ;tag=6588be27","type":"text"}]},{"type":"paragraph","content":[{"text":"To: \"01510000000\" ;tag=d3930f95-ad02-43bd-868a-833b4d4dc29f","type":"text"}]},{"type":"paragraph","content":[{"text":"CSeq: 2062 INVITE","type":"text"}]},{"type":"paragraph","content":[{"text":"Server: Asterisk PBX 13.4.0","type":"text"}]},{"type":"paragraph","content":[{"text":"Record-Route: , ","type":"text"}]},{"type":"paragraph","content":[{"text":"Contact: ","type":"text"}]},{"type":"paragraph","content":[{"text":"Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER, REGISTER","type":"text"}]},{"type":"paragraph","content":[{"text":"Content-Type: application/sdp","type":"text"}]},{"type":"paragraph","content":[{"text":"Content-Length: 272","type":"text"}]},{"type":"paragraph","content":[{"text":"v=0","type":"text"}]},{"type":"paragraph","content":[{"text":"o=- 1655472689 3 IN IP4 XXX.X.XXX.XXX","type":"text"}]},{"type":"paragraph","content":[{"text":"s=Asterisk","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"c=IN IP4 XXX.X.XXX.XXX","type":"text"}]},{"type":"paragraph","content":[{"text":"t=0 0","type":"text"}]},{"type":"paragraph","content":[{"text":"m=audio 59068 RTP/AVP 0 8 101","type":"text"}]},{"type":"paragraph","content":[{"text":"a=rtpmap:0 PCMU/8000","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"a=rtpmap:8 PCMA/8000","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"a=rtpmap:101 telephone-event/8000","type":"text"}]},{"type":"paragraph","content":[{"text":"a=fmtp:101 0-16","type":"text"}]},{"type":"paragraph","content":[{"text":"a=ptime:20","type":"text"}]},{"type":"paragraph","content":[{"text":"a=maxptime:150","type":"text"}]},{"type":"paragraph","content":[{"text":"a=sendrecv","type":"text"}]},{"type":"paragraph","content":[{"text":"a=nortpproxy:yes","type":"text"}]},{"type":"paragraph","content":[{"text":"...","type":"text"}]},{"type":"paragraph","content":[{"text":"17/06 XX.XX.XX.XXX","type":"text"}]},{"type":"paragraph","content":[{"text":"ACK sip:127.0.0.8;line=sr-N6IAzBF4zmZ6OBFLMJZfzxy-W.y6My**;transport=tls SIP/2.0","type":"text"}]},{"type":"paragraph","content":[{"text":"Call-ID: d7762e90bfa148e37ea41f4bd4075a","type":"text"}]},{"type":"paragraph","content":[{"text":"Via: SIP/2.0/TLS XX.XX.XX.XXX:5061;branch=z9hG4bK90f1854c843811c4","type":"text"}]},{"type":"paragraph","content":[{"text":"From: \"Jim Smith\" ;tag=6588be27","type":"text"}]},{"type":"paragraph","content":[{"text":"To: \"01510000000\" ;tag=d3930f95-ad02-43bd-868a-833b4d4dc29f","type":"text"}]},{"type":"paragraph","content":[{"text":"CSeq: 2062 ACK","type":"text"}]},{"type":"paragraph","content":[{"text":"Max-Forwards: 70","type":"text"}]},{"type":"paragraph","content":[{"text":"User-Agent: Ringotel Server","type":"text"}]},{"type":"paragraph","content":[{"text":"Proxy-Authorization: Digest response=\"df29d4cc5debf71a7ec415539e8c47ae\",realm=\"voip.domain.net\",uri=\"sip:01510000000@voip.domain.net:5061;transport=tls\",nonce=\"YqyDXWKsgjFwjIDbyX94FSYjTzc3I774\",username=\"Jim Smith\"","type":"text"}]},{"type":"paragraph","content":[{"text":"Route: , ","type":"text"}]},{"type":"paragraph","content":[{"text":"Contact: ","type":"text"}]},{"type":"paragraph","content":[{"text":"Content-Type: application/sdp","type":"text"}]},{"type":"paragraph","content":[{"text":"Content-Length: 224","type":"text"}]},{"type":"paragraph","content":[{"text":"v=0","type":"text"}]},{"type":"paragraph","content":[{"text":"o=jim 1655472689 2 IN IP4 XX.XXX.XX.XXX","type":"text"}]},{"type":"paragraph","content":[{"text":"s=SIP Call","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"c=IN IP4 XX.XXX.XX.XXX","type":"text"}]},{"type":"paragraph","content":[{"text":"t=0 0","type":"text"}]},{"type":"paragraph","content":[{"text":"m=audio 43892 RTP/AVP 0 101","type":"text"}]},{"type":"paragraph","content":[{"text":"a=rtpmap:0 PCMU/8000","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"a=rtpmap:101 telephone-event/8000","type":"text"}]},{"type":"paragraph","content":[{"text":"a=fmtp:101 0-15","type":"text"}]},{"type":"paragraph","content":[{"text":"a=ptime:20","type":"text"}]},{"type":"paragraph","content":[{"text":"a=sendrecv","type":"text"}]},{"type":"paragraph","content":[{"text":"…","type":"text"}]},{"type":"paragraph","content":[{"text":"17/06 XX.XX.XX.XXX Session details:","type":"text"}]},{"type":"paragraph","content":[{"text":"ssrc=375200669 frac=0 psize=160 fseq=19645 delay=0 jit=10 packets=540 mfrac=0 ","type":"text"},{"text":"codec=0","type":"text","marks":[{"type":"strong"}]},{"text":" lseq=20184 octets=86400 mdelay=0 lost=0 ","type":"text"},{"text":"To=","type":"text","marks":[{"type":"strong"}]},{"text":"XXX.X.XXX.XXX:59068 ","type":"text"}]},{"type":"paragraph","content":[{"text":"ssrc=1768293115 mjit=71 frac=0 ","type":"text"},{"text":"From=","type":"text","marks":[{"type":"strong"}]},{"text":"XXX.X.XXX.XXX:59068 psize=160 fseq=40182 jit=15 packets=620 mfrac=0 ","type":"text"},{"text":"codec=8","type":"text","marks":[{"type":"strong"}]},{"text":" lseq=40801 octets=99200 mdelay=13 lost=0 ","type":"text"}]},{"type":"paragraph","content":[{"text":"-----------------------------------------------------------------------------------------","type":"text"}]},{"type":"paragraph","content":[{"type":"hardBreak"}]}],"version":1}

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