Method and apparatus for prepayment of telecommunication connect

Method and apparatus for prepayment of telecommunication connect

Method and apparatus for processing charges for a communication

Method and apparatus for producing information regarding the...

Method and apparatus for providing answer supervision and an aut

Method and apparatus for providing answer supervision and an aut

Method and apparatus for providing call detail records at...

Method and apparatus for providing multi-network virtual service

Method and apparatus for providing pre-pay and post-pay...

Method and apparatus for providing prepaid local telephone...

Method and apparatus for providing prepaid local telephone...

Method and apparatus for providing prepaid local telephone...

Method and apparatus for providing prepaid...

Method and apparatus for providing prepaid...

Method and apparatus for providing subscribers with...

Method and apparatus for providing telephone billing and authent

Method and apparatus for providing telephone calling card valida

Method and apparatus for providing user access via multiple...

Method and apparatus for real-time billing account query

Method and apparatus for recording and rating telecommunication