Cisco 7960 Administrator's Guide

Appendix B SIP Call Flows
Call Flow Scenarios for Successful Calls
B-42
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
Figure B-9 Cisco SIP IP Phone-to-Cisco SIP IP Phone Network Call Forwarding (Unconditional)
IP IP
7. 200 OK
4. INVITE C
6. 200 OK
9. ACK
5. 180 Ringing
1. INVITE B
8. ACK
3. 302 Moved Temporarily
2. INVITE B
IP Network
SIP IP
Phone
User A
SIP IP
Phone
User B
SIP IP
Phone
User C
Proxy
Server
Redirect
Server
IP
41471
2-way RTP channel

Cisco 7960 Specifications

General

Codecs	G.711, G.729a
Protocol Support	SCCP, SIP
Ethernet Ports	2 x 10/100 Ethernet ports
Power Options	Power over Ethernet (PoE), AC adapter
Audio	Full-duplex speakerphone
Buttons	6 line buttons
Weight	3.5 pounds