asterisk users - Dec 2004 - Switch polarity to disconnect a FXS channel

Hi friends,
 
I?m trying to integrate Asterisk  with another PBX (Nortel Meridian)
 
I need to switch the polarity of a FXS port (ZAP channel) to inform the
other PBX that the channel was released.
 
Does anyone knows the way I can do it?
 
Many thanks in advance.
 
Merry Christmas to the   *   world    ! ! !.
 
Luis
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On Fri, 24 Dec 2004, Luis Czop wrote:
> Hi friends,
>  
> I?m trying to integrate Asterisk  with another PBX (Nortel Meridian)
>  
> I need to switch the polarity of a FXS port (ZAP channel) to inform the
> other PBX that the channel was released.
>  
> Does anyone knows the way I can do it?
There has been some talk lately regarding both detcting reversals and 
generating them. The former is mostly on the bug tracker and the latter 
(which you are interesetd in) can be found on asterisk-users. Search for 
"TDM400P FXS polarity reversal". 

I don't think either is implemented yet in the standard distribution/cvs 
tree.

Peter