Appendix B SIP Call Flows
Call Flow Scenarios for Successful Calls
Cisco SIP IP Phone-to-Cisco SIP IP Phone Simple Call Hold
Figure B-4 illustrates a successful call between Cisco SIP IP phones in which one of the participants places the other on hold and then returns to the call. In this call flow scenario, the two end users are User A and User B. User A and User B are both using Cisco SIP IP phones, which are connected via an IP network.
The call flow scenario is as follows:
1.User A calls User B.
2.User B answers the call.
3.User B places User A on hold.
4.User B takes User A off hold.
5.The call continues.
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