[asterisk-bugs] [JIRA] (ASTERISK-25171) Early feature code attended transfer completion results in intermittent one-way audio, "ghost ringing" and robotic sound, with some phones.

[Rusty Newton (JIRA)]

Rusty Newton created ASTERISK-25171:
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             Summary: Early feature code attended transfer completion results in intermittent one-way audio, "ghost ringing" and robotic sound, with some phones.
                 Key: ASTERISK-25171
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-25171
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Bridges/bridge_native_rtp, Resources/res_pjsip
    Affects Versions: SVN, 13.4.0
         Environment: * Asterisk GIT-13-723a9d4 built by rnewton @ newtonr-laptop on a x86_64 running Linux on 2015-05-27 16:13:50 UTC
* pjsip 2.3
            Reporter: Rusty Newton


Three phones, A, B and C. 

A and B are Digium D40's. I've tested with C being an ATCOM AT-610PR and a Yealink SIP-T28P. If I swap C out with a Digium D40 the problem does not occur. It only occurs with the Yealink and ATCOM as C, and possibly with other phones that I don't have on my desk.

REPRODUCTION:

* A calls B
* A initiates feature code attended transfer and dials C
* While C is ringing, A hangs up. "blonde transfer"
* C answers and is bridged with B.

The result is that B, hears muffled and static-ridden ringing that goes on seemingly forever. Typically B does not receive audio from C, but every few calls B will be able to hear C. The received audio when available will be quite robotic sounding.

The audio from B to C is fine. C can hear B clearly.

Debug to be attached shortly.



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