[Asterisk-Dev] Polarity Reversal ?

[Gary]

On Tue, 6 May 2003 17:27:07 +0530, Vinod Sankar wrote:

>Hello,
>
>Do Digium E1 cards support polarity reversal to detect call answer ?
>If not, is there any definite way of detecting call answer on the PSTN
>side before sending a connect confirmation message to the IP side ?
>
>thanks,
>Vinod

I might way out of line on this.... BUT

How the heck can you do a polarity reveral on an E1 channel ?? wouldn't
the required signalling be actually on the data channel ??

Your mention of PSTN in this context I find confusing as E1 is ISDN
signalling...

Gary
.