Hello list,

I have seen a call flow in one of UA like below.

User Agents A , B and C are connected to PBX.

The call is established between UA A and UA B.

Now B wants to transfer the call of A to C .

first steps B press transfer button , a reinvite goes to A to put on hold

in second step B completes pressing the number  he gets a ring tone ( c
ringing now).

in third step B again press transfer button to complete the transfer of this
call to A.

After the third step UA-B is sending the cancel method to PBX to cancel the
call which it establised .

After this cancel it is sending the REFER method which contains the transfer
details .

Is this correct implementation , if yes can i know which RFC contain this
standard.


regards
vlrk
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