230
Item Description
Mode
Out-of-band
Transmission
Specify the out-of-band SIP DTMF transmission mode.
RFC2833
Adopt DTMF named telephone event (NTE) transmission mode.
When you adopt this transmission mode, you can configure the
payload type field in RTP packets.
DSCP Field Value
Pre-defined
Set the DSCP value in the ToS field in the IP packets that carry
the RTP stream.
Customized Input the customized DSCP value in the
Customized
field.
VAD
The voice activity detection (VAD) discriminates between silence
and speech on a voice connection according to signal energies.
VAD reduces the bandwidth requirements of a voice connection
by not generating traffic during periods of silence in an active
voice connection. Speech signals are generated and transmitted
only when an active voice segment is detected. Researches show
that VAD can save the transmission bandwidth by 50%.
• Enable.
• Disable.
By default, VAD is disabled.
Configuring advanced settings of a call route
Configuring coding parameters of a call route
Select Voice Management > Call Route from the navigation tree, and then click the icon of the
call route to be configured to access the advanced settings configuration page.
Figure 611 Configuring coding parameters of the call route
For coding parameters configuration items of the call route, see Table 227.
Configuring other parameters for a call route
Select Voice Management > Call Route from the navigation tree, and then click the icon of the
call route to be configured to access the advanced settings configuration page.
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