Apparatus and method for determining cost of telephone calls
Apparatus and method for ensuring a real-time connection...
Apparatus and method for ensuring a real-time connection...
Apparatus and method for ensuring a real-time connection...
Apparatus and method for generating call duration billing record
Apparatus and method for generating call information data...
Apparatus and method for integrating phone communications...
Apparatus and method for optimizing the use of long distance tel
Apparatus and method for preventing unauthorized access to a sys
Apparatus and method for processing information from a...
Apparatus and method for providing multiple line billing in...
Apparatus and method for recording call related data
Apparatus and method for specifying and obtaining services...
Apparatus and method of determining switch utilization within a
Apparatus and method of providing a call service using a...
Apparatus and method to identify inter-MTA calls
Apparatus and method to identify potential work-at-home callers
Apparatus for and method of verifying service user's information
Apparatus for delivery of prepaid telecommunication services...
Apparatus for displaying call charges in telephone and method th