provided by Star2Billing S.L.

Hello Forum,

I have a strange behaviour with the callback engine.

Callback with normal phones via CID-Authentication works just fine. Callback initiates and the user can send the number to call. Audio will be transmitted.

But when I use web-callback the calls will be initiated as well, but I can't hear anything. Seems to be, that the calls are not "connected" properly...

Unfortunately I have a SMS callback solution via SOAP in work(which also was discussed here in the forum), which uses nearly the same method of sending the callback the the daemon.
This solution has the same bevaviour as the web-callback. No audio!

Has anyone a hint, where I can start the search for the problem???

I tried to use just one trunk for everything and tried various devices (mobile, landline, ...)

I resolved this yesterday enabling option play_audio for the appropriate agi-conf group. But, honestly, it is not clear enough for me what does this option mean

Hello Entropy,

I have "play_audio = YES" in all of the agi-conf's

And you had the exactly same error, that webcallback had no sound and CID-Callback worked fine?

I'm very thankful for any help!

OK. I fixed it.

The problem was: I configured the variable "callback_audio_intro" to
callback_audio_intro =

without a intro file, cause i did not want to play it for normal callback users as they already have the credit informations played.

So I reactivated the intro (callback_audio_intro = prepaid-callback_intro) and adjusted the a2billing.php file to just just play it during cid-callback.

Very strange. Really cannot explain why the missing callback_audio_intro is causing this bevaviour. Maybe cause there should always any intro sound to initialize the channel?

Oh, by the way: I'm using A2Billing 1.3.4 with some personal adjustments...

Thanks to Entropy for answering...

Wish you all a happy new year next week...