Data collection method and system with shorter control interval
Data processing system for communications network
Data processing system for communications network
Data processing system with real time priority updating of data
Database-driven automatic message accounting system and method
Debit card system without centralized server
Decreased-size representation employed with portion of...
Destination device billing according to call recipient
Destination device order billing according to call recipient
Detecting high usage telecommunications lines
Detecting possible fraudulent communication usage
Detection of common information elements in PSTN call...
Device for collecting, processing, working, and managing...
Devices for delivering information on their communications to su
Dial unit detachably mounted on public telephone for equal acces
Dial-around compensation method and system
Dialing plan service including outgoing call screening,...
Differentiated threshold value behavior in prepaid services
Direct distance dialing (DDD) access to a communication...
Directory dialing telephone set