Can be done using an IN – Intelligent Network – solution.
You will need:-
-IP/Intelligent Peripheral (gsmSRF),
-IN application hosted by a SCP / gsmSCF
(supports call control)
-MSC / SSF / gsmSCF for “triggering”
IP will be used for Prompt and Collect. Supports IVR capabilities.
VBR/ Wallis Dudhnath