provided by Star2Billing S.L.

I have posted a long post previously but I don't know why i couldn't see it on the forum. Someone may have deleted it accidentally? Anyway guys please read my post below and I hope to have some help from you...

I setup callback, followme, and voip services using a2billing system + ISDN running no problem for more than a year. However, recently there is a need for me to try to setup this same system using TDM400 FXO and I couldn't get the callback service to work at all.

I call the callback number (Zap-1) and zap-1 tries to hangup my call and zap-2 calls me back no problem, however, as soon as I answer the call, I
got hangup immediately and from the record, it says

== Starting Zap/2-1 at a2billing-callback,1000,1 failed so falling back to exten
's'
== Starting Zap/2-1 at a2billing-callback,s,1 still failed so falling back to
context 'default'

and I don't understand why this happen because a2billing-callback,1000 is only used for web callback and how come it is used in this CID-Callback scenario?? Do you have any idea guys? Or do you happen to know anyone successfully setup callback on FXO??

Thanks a lot and I hope to hear from you soon. I'm so god damn stressed now...

Regards,
sd