Individual telephone line call event buffering system
Indoor telephone network interface device
Inductive amplifier having automatic gain control for butt set
Inductive amplifier having comb filter
Information terminal apparatus
Informing system
Instructive out-of-service telephone lines
Integrated bit error rate test function in analog channel unit o
Integrated communication error reporting system
Integrated international telephone circuit monitoring system
Integrated metallic access for high port density DSLAM
Integrated ring sensor with fault detection
Integrated voice processing system
Intelligent line testing
Intelligent services network test system
Inter-circuit line fault location in telecommunication networks
Inter-mobile-terminal testing method in cellular automobile tele
Interactive measurement system and method for telecommunication
Interactive telephone response module
Interface device for testing a telecommunication circuit