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
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
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
Placing a Call Without
Using a SIP Proxy”
section on page 4-10
.
Table 4-2
Additional SIP Services (continued)
SIP Service
Description
Reference
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