provided by Star2Billing S.L.

This is my first time to setup a call-back system.

I am done with setting up cards, rate plans and etc.
I have no ZAP channel bank, and I am trying to set up call back to both legs though SIP trunk.
If I register with softphone, make a phone call, it goes through as it should, and the A2billing bills accordingly. Means SIP trunk and etc has no problem.

Now, I am trying to queue up the call-back from A2billing-UI's Call-Back->Add New Call Back.

If I put as follow, it works.
Channel: SIP/801 (which is my local ext.)
Exten: 1408xxxxxxx (The number I wish to call)
Context: a2billing
Priority: 1
CallerID: 801 (I set caller-ID auth over card number option in a2billing.conf)

Then it calls my local extension 801, and when it's answered, gives me the available minutes, and finally connects the 1408xxxxxxx.
CDR records and bills the second leg. That's great.

Now here comes the problem.

If I replacethe Channel: to SIP/1510xxxxxxx@TRUNKNAME
it still works as expected - Calls 1510xxxxxxx first, and when it's picked up, dials 1408xxxxxxx.
BUT, the billing issue is the thing I am talking about.
Since I am initiating the first call directly to the target trunk, it does not go through the A2Billing billing system.
So only second leg is billed.

Is there a way to have the first leg also go through the a2billing context so that its getting billed?

BTW, I tried SIP/1510xxxxxxx@localhost, SIP/1510xxxxxxx@a2billing, SIP/1510xxxxxxx and no luck yet.

First attempt gave me "487 Loop Detected" Error,
Second attempt comes out "cannot request SIP channel",
Third attempt turned to be "No such host 1510xxxxxxx"

Any advise will be greatly appreciated.