Billing for communications usage
Billing interface circuit
Billing method in a telecommunications system
Billing method in electronic switch in a cellular network
Billing system and method
Billing system for radio communications
Billing system for telephone signaling network
Binder identification
Bl-directional amplification apparatus
Blinking signal light system, especially for a series of...
Blocking calls to destinations which are registered in a...
Body fluid testing component for analyte detection
Bone-conduction handset
Bookmarking voice messages
Borsht/slic auto balancing technique
Branched telephone system
Bridge amplifier
Bridge biasing circuit for line powered amplifier
Bridge lifter circuit
Broadband communications system