Telephone system
Telephone system and method operated from central office loop cu
Telephone system gateway interface
Telephone-line powered coin telephone chassis
Telephony platform and method for providing enhanced...
Telephony system and method with enhanced fraud control
Telephony system for calling card calls
Theft proof pay phone
Toll telephone system and method for maintaining or initiating l
Tone Burst Generator
Transmitter for accessing pay-type telephones
Transportable logic to facilitate a large calling card...
Two-part apparatus and method for protecting coin-operated telep
Universal call access with reverse billing
Vandal-proof handset for a pay telephone
Virtual calling card system
Workstation for calling card fraud analysis