Method and apparatus for performing an automated collect call

Method and apparatus for performing an automated collect call

Method and apparatus for performing an automated collect call

Method and apparatus for phone card billing

Method and apparatus for planning telephone facilities networks

Method and apparatus for prepaid phone card activation and billi

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...