[asterisk-bugs] [JIRA] (ASTERISK-23145) Sporadic one way audio between a SIP hard phone and a SIPML5 browser client on LAN

[Rusty Newton (JIRA)]

Rusty Newton created ASTERISK-23145:
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             Summary: Sporadic one way audio between a SIP hard phone and a SIPML5 browser client on LAN
                 Key: ASTERISK-23145
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23145
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General, Channels/chan_sip/WebSocket, Resources/res_rtp_asterisk
    Affects Versions: 12.0.0, SVN
         Environment: Asterisk SVN-branch-12-r405587
Chrome Browser Version 32.0.1700.77
SIPML5 demo http://sipml5.org/call.htm?svn=203
            Reporter: Rusty Newton
            Severity: Critical
         Attachments: extensions.txt, full.txt, http.txt, messages.txt, rtp_fail.pcap, rtp.txt, sip.txt

Ran across one way audio issues that I believe stem from a bug while testing calls between two SIP clients (6001 and sipml5_chrome in sip.conf) in the process of building some documentation.

h3. Endpoints in sip.conf

*6001* is a Digium D40
*sipml5_chrome* is SIPML5 on the sipml5.org demo running on Chrome.

h3. Problem description

 * When *calling from 6001 to sipml5_chrome*, approximately one out of every three to six calls has one way audio, with audio flowing from 6001 to sipml5_chrome, but not the other way around.

 * When *calling from sipml5_chrome to 6001*, I appeared to get two way audio every time.

h3. Environment

SIPML5 is running on a Chrome browser, on the machine running Asterisk.

The Digium phone is on the local LAN. There is no hardware or software firewalls or NAT going on.

h3. Files attached

h5. Config files
extensions.txt
http.txt
rtp.txt
sip.txt
h5. Asterisk logs
full.txt
messages.txt
h5. Packet capture

rtp_fail.pcap

The pcap contains several calls. Out of the six calls at the end, the first five had one-way audio, and *the very last call had two-way audio* (should be the very last call in the pcap.

h5. SIPML5 configuration

sipml5_config.png

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