User A
User B
Address complete
message (ACM)
LE A
LE B
TE
Ringing signal
Ringing tone
Ringing signal is sent to user B (user B is
alerted).
Ringing tone is sent to user A.
(Ringing tone is generated locally at LE A or is sent from LE B through circuit
switched path)
Signalling
sequence 3 (call setup)
or