System and method of validating special service calls having dif

System and method to determine and deliver quotes for...

System and method to determine and deliver quotes for...

System and methods for controlling virtual paths within a...

System for accessing telephonic communications and for conductin

System for automatically providing customer access to alternativ

System for completing air-to-ground telephone calls

System for controlling telecommunication overload traffic

System for controlling the provisioning of long distance service

System for generating service-oriented call-charge data in a...

System for interception and transmission of communication signal

System for least cost routing of data transactions in a telecomm

System for managing telecommunications infrastructure

System for operating public modular telephones

System for placement of a long distance telephone carrier point-

System for processing calling party information for internationa

System for processing calling party information for internationa

System for providing caller information to called party via call

System for providing caller information to called party via...

System for providing communication services