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Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
Chapter 4 Basic and Additional SIP Services
Additional SIP Services
Table 4-2 Additional SIP Services
SIP Service Description Reference
Advanced audio
configuration.
The TOS parameter (which specifies the default IP
precedence of UDP packets) and AudioMode
parameter (which specifies the audio operating mode)
allow you to tune audio configuration.
See the “SIP Parameters”
section on page 8-9 and
the “Audio Parameters”
section on page 8-24.
Call preferences The GUI Show Mask or CallPrefGuiShow specify
which parameters, if any, appear on the Call
Preferences menu on the phone. The GUI Set Mask or
CallPrefGuiSet parameters specify which parameters
on the Call Preferences menu on the phone can be
changed by an end user. You can use these parameters
to offer specific features on a subscription basis
See the “Call Preference
Parameters” section on
page 8-13.
Comfort noise When silence suppression is turned on in G.711, the
Cisco IP Phone calculates and transmits its noise level
to the far end to enable the remote endpoint to generate
the appropriate amount of comfort noise. This feature
provides the remote user with a similar experience to
that of a PSTN call and prevents silent gaps when
neither party is talking.
You enable or disable silence suppression with bit 0 in
the AudioMode parameter.
See the “Audio
Parameters” section on
page 8-24.
Debugging
diagnostics
You can use the following parameters to troubleshoot
operation issues:
• NPrintf—Specifies the IP address and port where
debug information is sent.
• TraceFlags—Turns on specific trace features.
See the “Network
Parameters” section on
page 8-2.
Dial plan You can use the DialPlan parameter to set specific dial
plan rules and timeout values. Many of these values are
determined on a country-by-country basis.
See the “SIP Parameters”
section on page 8-9.
Disabling access
to the web
interface
To prevent tampering and unauthorized access to the
Cisco IP Phone configuration, you can use the OpFlags
parameter to prevent configuring the phone through the
web.
See the “Network
Parameters” section on
page 8-2.