[Asterisk-Dev] double ringing tone on 1.2.1 bug or misconfiguration ?

[Simone Cittadini]

there's a thread on users's ml started by myself "double ringing tone on 
asterisk 1.2",
seems I'm not the only one  having the same problem with 1.2.1

Given that it seems a problem that goes deeper than misconfiguration 
what other logs/modules/tests should I investigate to understand what's 
happening ?



----------- users ml relevant posts

While I wait for the call to be answered I hear a "double ringing tone", 
like :

expected tone :
tuuu         tuuu         tuuu         tuuu

what I hear :
tuuu tuuu   tuuu tuuu   tuuu tuuu   tuuu tuuu

the second "tuuu" I think is generated somewhere and not "true", since 
it sounds slightly different and the lambda between the first and the 
second is always different.

the problem appears no matter where I terminate the call (IAX or Zap), 
and I don't have that problem on a 1.0.7 connected to the same PRI lines 
and IAX servers , what I have to check ? looked in confif files but 
appears to be the same (indications, modules loaded, iax, zapata, the 
dial in extensions is the same)

--

i suffer the same double ring tone on our 1.2.1 box. 1.0.9 box ha no such
problem. i used the r to solve it but this is not a good solution though.

--



Actually, I'm not complaining, but I've experienced a similar problem. 
For me it only happens with IAX calls, and from there only IAX calls 
with a particular ITSP.

But his description rings very true: there are two rings per time that 
the far-end phone is ringing, and just like he said, one of them sounds 
genuine and the other sounds like perhaps my provider is adding it to 
the audio coming my way.

The dinger is that it doesn't happen on all calls; it's more or less 
random, but frequent.