Hi
Analogue lines answer the call, so A2Billing will bill from dialing the number. Nothing you can do about this, that's how they work.
You can alleviate the effects of this to a limited degree by using the minimum time to bill, which says if the call is less than x seconds, then don't bill at all, but if it's longer, bill for everything.
You can also use stepped billing to make the first X seconds of the call free of charge.
Using Analogue lines is not ideal for this kind of service, I'd advise using PRI or SIP.
In terms of setting up your gains on the dahdi card, this is not the place to discuss it, but it is useful to run fxotune to set the levels correctly.
Joe
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