Appendix B SIP Call Flows
Call Flow Scenarios for Successful Calls
Cisco SIP IP
Figure B-9 illustrates successful call forwarding between Cisco SIP IP phones in which User B has requested unconditional call forwarding from the network. When User A calls User B, the call is immediately transferred to Cisco SIP IP phone C. In this call flow scenario, the end users are User A, User B, and User C. They are all using Cisco SIP IP phones, which are connected via an IP network.
The call flow scenario is as follows:
1.User B requests that the network forward all calls to Cisco SIP IP phone C.
2.User A calls User B.
3.The network transfers the call to Cisco SIP IP phone C.
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