[Asterisk-Dev] Polarity Reversal ?

[Vinod Sankar]

Good point about polarity reversal! that part of the question was 
probably a dumb one. My previous experience is only with FXO cards.

My question should be how to detect call answer on the channels of an E1 card
configured for voice ?

thanks,
Vinod

On Tue, May 06, 2003 at 10:48:46PM +1000, Gary wrote:
- 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
- .
- 
- 
- 
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