Cisco 7960 Administrator's Guide

Appendix B SIP Call Flows
Call Flow Scenarios for Failed Calls
B-66
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
Cisco SIP IP Phone-to-Cisco SIP IP Phone—Called User is Busy
Figure B-16 illustrates an unsuccessful call in which User A initiates a call to
User B but User B is on the phone and is unable or unwilling to take another call.
Figure B-16 Cisco SIP IP Phone-to-Cisco SIP IP Phone—Called User is Busy
IP IP
2. 486 Busy Here
3. ACK
1. INVITE B
IP Network
SIP IP
Phone User A
SIP IP
Phone User B
41475

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