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Chapter 1 Overview of the Cisco IP Phone Models 7905G and 7912G
Software Features
1-6
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
• Call transfer—attended and unattended
• Message-waiting indicator
Related Topics
• Protocols, page 1-4
• Basic Services, page 1-5
• SIP-Specific Services, page 1-6
SIP-Specific Services
The Cisco IP Phone models 7905G and 7912G support the following SIP-specific
services:
• Direct IP dialing in addition to proxy-routed calls.
• Configurable periodic registration with a SIP proxy server.
• Authentication support for all SIP methods.
• Configurable NAT support.
• Configurable outbound proxy support.
• Local support for call return (or call back), call forwarding, and call transfer.
• FQDN for SIP proxy and outbound proxy.
• Uses the same configurable MediaPort to transmit and receive RTP audio.
• Out-of-Band DTMF via RFC2833 (also known as AVT tones).
• UDP for SIP signaling.
• Message-waiting indication (MWI) provided via the telephone-handset LED
lamp.
• Distinctive ringing support via the SIP Alert-Info header.
Related Topics
• Protocols, page 1-4
• Basic Services, page 1-5
• Supplemental Services, page 1-5