Caller ID
A telephone service available both in digital and analogue systems allows displaying a number of the calling subscriber on the display. And where it is possible the caller’s name can be also lighted up.
Configurations
of GSM/VoIP networks allow the service providers to avoid the local Wired
Public Switched Network (PSTN) in communication with a GMS mobile handset. As a
result, the high rates charged by telephone companies are avoided.
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