[asterisk-bugs] [JIRA] (ASTERISK-25169) No audio from voicemail app with v13.4.0 on Grandstream GXP20XX phones

[Idon (JIRA)]

Idon created ASTERISK-25169:
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             Summary: No audio from voicemail app with v13.4.0 on Grandstream GXP20XX phones
                 Key: ASTERISK-25169
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-25169
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Applications/app_voicemail
    Affects Versions: 13.4.0
         Environment: Ubuntu 14.04.2 LTS x64
Vmware ESXi 5.5
Guest memory allocation: 1GB
            Reporter: Idon


When either calling into the voicemail application directly or being transferred to voicemail (i.e. when called party is unavailable), none of the voicemail prompts can be heard.  Looking at the Asterisk console, it is evident that it is being processed, but there is no audio.

This is a regression introduced in Asterisk 13.4.0 and, so far, appears to affects only Grandstream phones.  The specific models we have that I've tested against are GXP2000 and GXP2020.

So far, no other IP phone (Snom and Digium) or softphone (Jitsi) I've tested against has an issue with voicemail and 13.4.0.

Reverting to 13.2.0 resolves the issue.

I'm not sure what else may be required to help track down the issue.  I tried debugging RTP in the console and I do see communication between the phone and Asterisk; therefore, Asterisk must be sending some malformed bit of data that's causing Asterisk to ignore the stream.

Let me know if there's some additional bit of info that's needed.



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