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Differentiated Services Code Point (DSCP) in the IP header is set to
24 (0x18). For layer 2, IEEE 802.1p tagging is supported. This
option is unchecked by default.
Media Settings
Use the Media page to specify the preferred audio codecs and other audio stream
processing preferences as shown in the illustration below. After changing any of these
settings, the phone must be restarted for the changes to take effect.
Media Settings
Codec 1, 2, 3, 4
Use the four codec fields to specify the preferred audio codecs to
use, listed in priority order. The supported codecs are: G.722,
G.711 µ-law (PCMU), G.711 α-law (PCMA), and G.726-32kbps. If
fewer than four codecs are desired, choose “Disabled” for the
unused codec options. Please note that at least one Codec has to
be provided as Codec 1 does not offer the option “Disabled”. The
default precedence order is as shown in the list above.
Audio Quality
The Audio Quality setting determines which audio resampling
method to use. A higher number uses a more sophisticated
resampling method (ranging from a large filter to smaller filters down
to a linear method). More sophisticated resampling requires more
CPU processing, but delivers better audio quality. Audio Quality can
be set to values between 1 and 10, with 6 being the default.
Codec ptime
override
The ptime (packetization interval) value for a codec determines the
length of time in milliseconds represented by the media in an RTP
packet which is used to transmit audio traffic. The valid range is 10-
1000. Leave the field blank to use the default value. For all of the
codecs supported by FLX, the default ptime value is 20 ms/packet.