Country to country call intercept process
Designated channel terminating method and apparatus
Detection of carrier mis-routing in telephone systems
Detection of carrier mis-routing in telephone systems
Dial tone interrupt device
Disconnect circuit for use between telephone switching systems
Distributed privacy oriented telephone extension system
Dual-line telephone bridging device that gives remote telephones
Encapsulation, compression and encryption of PCM data
Encapsulation, compression, and encryption of PCM data
Enhancement do not disturb subscriber feature within a telecommu
Exchange system for incoming calls from direct-in lines
Fraud evaluation and reporting system and method thereof
Fraud monitoring in a telecommunications network
Fraud prevention apparatus and method for performing policing fu
Fraud prevention in a public telephone station
Fraud prevention in a telecommunications network
Handset actuated signal intercept
Incoming call completion threshold restriction
Installation of a multi-terminal network