Call routing selection method
Call routing system
Call routing system and method
Call routing system and method with rule-modifying ability
Call tones in communication networks
Call-load-control arrangement for an emergency-call-answering ce
Call-routing method for a virtual private network as well as ser
Called party control of incoming calls
Calling subscriber validation
Capability negotiation in a telecommunications network
Capability negotiation in a telecommunications network
Carrier direct calling
Carrier identification codes (CIC) conversion
Carrier identification codes (CIC) transport
Carrier proportioned routing
Channel associated signalling (CAS) compatible...
Channel establishing method of point-to-multipoint and multipoin
Circuit arrangement for a small PABX with a switching matrix tha
Class-of-service automatic routing
Common automatic route selection leading digit strings