Cross point mixer for a telephone set

Cross point switch with power failure mode

Cross-connect module and mount

Cross-connect switch

Cross-connect switch and method for providing test access theret

Cross-connected switch having means for removing switching modul

Cross-frame dual tone multifrequency detector

Cross-over voltage lock for differential output drivers

Crossbar line hunting arrangement

Crosstalk identification for spectrum management in...

Crosstalk identification for spectrum management in...

Crosstalk identification in xDSL systems

CRT mass-distribution, preprogrammed automatic dialing mechanism

CTI integration of telephonic calls moved between switches...

Current amplifier, particularly for a telephone line

Current limited electronic ringing generator

Current limited subscriber interface circuit

Current limiting battery feed arrangement

Current mode ring trip detector

Current sense circuit in a line powered network element