227578 ⎘
Automatic or semi-automatic exchanges; Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring; Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using ringback
Method of and a device for quantifying a tone signal received in a telecommunications network
#2Method for checking a ring-back signal
#3Method for Sharing Audio-only content, Audio-Visual content, and Visual-only content between Subscribers on a Telephone call
#4Real time measurement of network delay
#5Method and apparatus of transmitting personal information in subscriber-based ringback tone service
#6Polled geofencing and distinguished ring-back