R2511-HP MSR Router Series Voice Command Reference(V5)

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Parameters
voip-to-pots time: Specifies the time duration in seconds for switching from the current VoIP link to
another VoIP link or a PSTN link (the call backup switching time) in case of a VoIP call failure, in the range
of 3 to 30.
Usage guidelines
For more information about call backup, see Voice Configuration Guide.
Examples
# Set the time duration for switching from the current VoIP link to another VoIP link or a PSTN link in case
of a VoIP call failure to 3 seconds.
<Sysname> system-view
[Sysname] voice-setup
[Sysname-voice] voip timer voip-to-pots 3
vqa dscp
Use vqa dscp to globally set the DSCP subfield in the ToS field in IP packets that carry the RTP stream or
voice signaling.
Use undo vqa dscp to restore the default.
Syntax
vqa dscp { media | signal } dscp-value
undo vqa dscp { media | signal }
Default
The DSCP subfield is set to ef, namely, 101110.
Views
Voice view
Default command level
2: System level
Parameters
media: Global DSCP value in the ToS field of the IP packets that carry RTP streams.
signal: Global DSCP value in the ToS field of the IP packets that carry voice signaling.
dscp-value: DSCP value in the range 0 to 63 or the keyword af11, af12, af13, af21, af22, af23, af31,
af32, af33, af41, af42, af43, cs1, cs2, cs3, cs4, cs5, cs6, cs7, or ef.
Table 22 DSCP values
Ke
y
word DSCP value in binar
y
DSCP value in decimal
af11 001010 10
af12 001100 12
af13 001110 14
af21 010010 18
af22 010100 20