Pricing method for telecommunication system
Private branch exchange
Private branch exchange apparatus and accounting process method
Procedure and system for the setting up of calls
Process and system for dynamically measuring switch traffic
Process for dynamic call routing in real time
Process for flexible rate charging for existing connections
Process for signalling cost information upon connection...
Process, exchange, charge computer, charge billing computer...
Processing of telecommunications call billing data
Professional services billing personal identification number
Providing called number characteristics to click-to-dial...
Providing effective advertising via synchronized telephone...
Public telephone system
Public telephone system using a prepaid card to enable communica