[asterisk-bugs] [JIRA] Created: (ASTERISK-20501) Distorted Audio if you Dial multiple numbers at once (DAHDI)

[Sven Hirschmueller (JIRA)]

Distorted Audio if you Dial multiple numbers at once (DAHDI)
------------------------------------------------------------

                 Key: ASTERISK-20501
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20501
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_dahdi
    Affects Versions: 1.8.15.0
         Environment: Debian 6.0, Kernel 26.39.4
            Reporter: Sven Hirschmueller


If you dial multiple numbers(channels) at once via the dial app a dahdi call will have distorted audio if it is tunneled in hardware and not in software.

e.g. You use following ael extension.

1000 => {
  Dial(dahdi/g10/1000&sip/1001);
};

If you dial 1000 and you pick up the call via isdn phone 1000 and your caller phone is also a isdn phone on the same BRI-Card the audio will be distorted.
If you pick up the phone via the sip phone the audio is ok.
If you don't use multi dial statements the call is also ok and finaly the call is ok if you add parameters to the dial statement that prevent a route of the audio data via the chips as asterisk need to interpret them. (e.g. parameters t or T)

so following statements are working
1000 => {
  Dial(dahdi/g10/1000);
};
also this will work
1000 => {
  Dial(dahdi/g10/1000&sip/1001,,tT);
};

i guess the problem is that the bridged call need to be masquaraded and in the end the hardware isn't told correctly witch b-channel to be tunneled to witch b-channel.

tested with a openvox b800p, sorry i can't test it with our didium te405p e1 cards as i miss the end point for e1.



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