Coexisting communication systems
Coin telephone non-coin service
Collecting switching system call billing data
Collision-free insertion and removal of circuit-switched...
Colocated cellular radiotelephone systems
Combined circuit and packet switching system
Combined home location register and service control point...
Combined land line and satellite communication switching system
Combined subtractive interference cancellation and space...
Combining qam and qpsk to optimize license capacity in...
Common automatic route selection leading digit strings
Common battery station service for pabx telephone system
Common bus control method
Common channel interoffice signaling system
Common channel signaling message intercept system
Common channel signaling with a network of distributed...
Common control digital echo suppression
Common control signaling extraction circuit
Common control telephone exchange system using mechanical...
Common controlled equalization system