[Asterisk-Users] False Zap answer problem

[Soner Tari]

And btw, I have CentOS 4.1. Could this be related with 2.6 kernel?

> Hi All,
>
> I am experiencing a very strange problem. I call the FXO channels (Zap/2 
> and 3) almost at the same time, and then hang both up. The operator 
> extension is Zap/6, and after the greeting message Zap/6 starts to ring 
> (there is no disconnect supervision here, and I disabled the busy detect 
> for hangup detection, so the outside lines stay open until Asterisk hangs 
> them up).
>
> As you can see on the following CLI section, when the VoiceMail promt 
> starts to play for Zap/2, the system thinks that Zap/6-2 has answered the 
> Zap/3, when in fact nobody answers it:
>
>    -- Hungup 'Zap/6-1'
>    -- Executing VoiceMail("Zap/2-1", "u0") in new stack
>    -- Playing 'vm-theperson' (language 'tr')
>    -- Zap/6-2 answered Zap/3-1
>
> I can very easily replicate this (did it 3 times).
>
> Where should I look for the source of this problem? Is it the TDM card or 
> the Asterisk? How does Asterisk know if a line has been answered on a TDM 
> card? This seems like some kind of cross-talk between the two FXO 
> channels, but it's really strange. Has anybody had a similar problem?
>
> Of course, the workaround is to use some sort of hangup detection on 
> outside lines, but I was having false hangup problems with busy detect, 
> thus disabled it and noticed this problem (and see my above comment on 
> disconnect supervision here).
>
> I have 2x TDM cards (version E/F) with 3x FXO and 4x FXS modules on each.
>
> Asterisk version is:
> Asterisk CVS-HEAD built by root at asterisk on a i686 running Linux on 
> 2005-08-10 22:55:45 UTC
>
> I have echocancel and echocancelwhenbridged enabled. (Could it be the 
> echocanceller?)
>
> I would appreciate any help,
> Soner
>
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users at lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users