[Asterisk-Users] Zap Polarity Reversal

[Mark Hulber]

I am in the US, NYC using a TDM400 card.  I never have never seen this 
issue until now.  I see some code has been changed in this area recently.

MARK.

Rich Adamson wrote:
>>> Previously I would get two events on my Zap channel which indicated
>>> ringing and answered.  Now I am getting polarity reversal events:
>>>
>>> Nov  2 07:01:25 NOTICE[18246]: chan_zap.c:6014 ss_thread: Got event 17
>>> (Polarity Reversal)...
>>> Nov  2 07:01:28 NOTICE[18246]: chan_zap.c:6014 ss_thread: Got event 17
>>> (Polarity Reversal)...
>>>
>>> I am using CVS Head from:
>>>
>>> Asterisk CVS HEAD built by root at asterisk.hulber.com on a i686 running
>>> Linux on 2005-11-02 05:13:32 UTC
>>> _______________________________________________
>>>       
>> Sounds like a new feature.  Have you tried reversing the polarity or putting
>> a butt set that indicates pol on the line?  I don't know that it makes a
>> difference but you might as well correct it if it is reversed.
>>     
>
> That actually sounds more like whatever telco he's connecting to is
> providing answer supervision in the form of polarity reversal. Without
> knowing more about which country / telco, there is no way to tell.
> Note the polarity reversal is happening _after_ asterisk gets a call,
> therefore not likely to have anything to do with reversed tip/ring.
>
> That same message does not occur in the US with the analog TDM card, so
> not sure what the OP has or is connected to.
>
>
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