Call establishment (mobile originated and mobile terminated)
•
In call modifi cation of the call type (voice/data)
•
Call re-establishment when the call is dropped (if allowed by the network)
•
The transmission of DTMF by signaling rather than in-band tones
SS is responsible for providing services such as call barring, call redirection, multi-party
calls, etc. in conjunction with the network.
SMS is responsible for the transmission and reception of point-to-point short messages
and also for the reception of cell broadcast short messages. ...
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