IP Telephone User Guide
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There are also options to set the audio codec and DTMF mode. These
should not require adjusting for normal use.
If your device has been configured by a service provider then the DTMF
option might not be available as this value has already been set correctly.
Codec selection
The codec screen provides an option to specify the permitted audio codecs
and which one is preferred. These settings should not usually need
changing and may have been locked by your ITSP.
There are four supported codecs. The first three have a high bandwidth
and the last has a low bandwidth. The
State
soft key enables or disables
the use of a codec. The
Pref
soft key allows the selected codec to be set
as the preferred one to use. A codec cannot be disabled while it is
preferred.
DTMF
If your device has not been pre-configured by your service provider there
may be an option to select how DTMF tones are sent. This setting should
generally be left in the configuration recommended by the ITSP.
The options are Inband or RFC2833 (RTP) based DTMF support.
Ringer
There are three settings that relate to the ringer:
•
Selection of ring tone.
•
Control over volume of ringing.
•
Ringing device can be set.
The screen below shows a typical example of the settings.
