B-9
Cisco Unified IP Phone 7960G and 7940G Administration Guide for Release 8.0 (SIP)
OL-7890-01
Appendix B SIP Call Flows
Call Flow Scenarios for Successful Calls
•
Network Call Forwarding (Unconditional), page B-31
•
Network Call Forwarding (Busy), page B-33
•
Network Call Forwarding (No Answer), page B-36
•
Three-Way Calling, page B-38
•
Call from a Cisco SIP IP Phone to a Gateway Acting As a Backup Proxy in a SIP Network, page
B-41
•
Call from a Cisco SIP IP Phone to a Cisco SIP IP Phone Using a SIP Backup Proxy, page B-43
•
Call from a Cisco SIP IP Phone to a Cisco SIP IP Phone Using a SIP Emergency Proxy, page B-45
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.
