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Chapter 4 Basic and Additional SIP Services
Additional SIP Services
4-10
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
Setting Up and Placing a Call Without Using a SIP Proxy
The Cisco IP Phone models 7905G and 7912G support direct IP-to-IP calls
without using a SIP proxy. When a call is placed, the phone sends the INVITE
request directly to the remote user agent and expects the usual 100/180/200
responses from the user agent.
Progress tones Values for the following parameters must be
determined based on the country in which the
Cisco IP Phone is located:
• DialTone
• DialTone2
• BusyTone
• ReorderTone
• RingBackTone
• CallWaitTone
See the “Tone
Parameters” section on
page 8-21.
Receiver-tagged
VIA header
You can use the ConnectMode parameter to disable or
enable the processing of the received = parameter in the
Via header. This feature is disabled by default.
See the “Audio
Parameters” section on
page 8-24.
Setting up and
placing a call
without using a
SIP proxy
You can user the Cisco IP Phone to make a direct
IP-to-IP calls without using a SIP proxy.
See the “Setting Up and
Placing a Call Without
Using a SIP Proxy”
section on page 4-10.
Table 4-2 Additional SIP Services (continued)
SIP Service Description Reference