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

Method and apparatus for reducing inbound traffic congestion...

Method and apparatus for retroactively updating a...

Method and apparatus for screening telephone calls

Method and apparatus for selective post-call audio logo/message

Method and apparatus for storing call feature data

Method and apparatus for telecommunications having automatic...

Method and apparatus for telephone call sub-billing

Method and apparatus for the billing of value-added communicatio

Method and apparatus for the billing of value-added communicatio

Method and apparatus for the billing of value-added communicatio

Method and apparatus for tracing a specific communication

Method and apparatus for universal call identification

Method and apparatus for utilizing a tiered flat rate...

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