Pair gain test unit for use in a combined telephony/video co-axi
Parallel-connected dialing signal transmission inhibiting...
Parallel-connected dialing signal transmission-inhibiting device
Pay telephone monitoring system
Payphone having master and slave modes
Perfected protection and cutting unit by rotational control devi
Performance monitoring of DS0 channel via D4 channel bank
Performance monitoring of DSO channel via D4 channel bank
Performance monitoring system for T1 telephone lines
Performing automated testing using automatically generated logs
Performing automated testing using automatically generated logs
Personal artificial loop (p.a.l.)
Personal virtual assistant
Portable fixture for simulating and testing payphones
Portable line test telephone
Portable telecommunications test instrument with inductive probe
Portable telecommunications test instrument with line condition
Portable telephone system
Portable telephone system
Power cutback configuration of digital subscriber line...