[Asterisk-Users] Reverse Battery Disconnect Supervision in X100P or TDM400P FXO

[Bartek Kania]

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On Wed, 28 Jul 2004, Luis Vazquez wrote:

> Is posible to make the Digium FXO cards detect disconnect supervision by
> polarity reversal instead of battery drop??

It is possible, but probably not as simple as just detecting the
reversal during an active call, since many telcos also signal when the
remote end answers by reversing polarity and this might be confused
for a hangup.

The X100P will not be able to do it from what I understand, but the
FXO-modules do detect it. There is no driver support yet. I have some
preliminary patches for it (check bug number 9 on
http://bugs.digium.com).

I have also implemented this for myself in sweden, and it (mostly)
works.

Find me on IRC i #asterisk (I go by the nick eGnarF) or email me
privately and I might be able to help you.

/B

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