TELES VoIP Box BRI Series, Reference Manual

Page: 104 / 226

5 Additional VoIP parameters
VoIPBox DSL / VoIPBox BRI – version 21.0.009 Page 104
VoipPCMPacketInterval=<int>
This parameter changes the default interval for PCM codecs (G.711, G.726). That
means the VoipTxm factor is muliplied using this interval:
For 16-channel chips:
0 = 20ms (default)
1 = 5 ms
2 = 10 ms
3 = 20 ms
For 8-channel chips:
0 = 10ms (default))
1 = 5 ms
2 = 10 ms
3 = 20 ms
VoipQualityCheck=<type minsamples limit recovertime>
type: Enter one of the following: ASR1, ASR2, RoundTripDelay, Jitter or FractionLost
When type is ASR1 or ASR2 :
minsamples: Minimum number of calls for which ASR shall be calculated with:
limit: A value between 0 and 100
recovertime: Seconds to block the profile.
When type is RoundTripDelay :
minsamples: Minimum number of seconds RTD must be above:
limit: The highest acceptable value for RTD (in milliseconds)
recovertime: Seconds to block the profile.
When type is Jitter :
minsamples: Minimum number of seconds jitter must be above:
limit: The highest acceptable value for jitter (in milliseconds)
recovertime: Seconds to block the profile.
When type is FractionLost :
minsamples: Minimum number of seconds FL must be above:
limit: The highest acceptable value for FL (percentage between o and 100)
recovertime: Seconds to block the profile
NOTE: If you base VoipQualityCheck on the ASR values: During setup, calls are calcu-
lated as not connected, which lowers the number of connected calls.
Example: If minsamples is set at 20, with a limit of 80%, 4 calls in the setup phase will
lower the ASR of the previous 20 calls to 80% and the profile will be blocked.
VoipResetVocoderOnReinvite=<yes/no>
Enter yes to create an audible delay in a voice call. Default no.
VoipRtpTos=<num>
Enter a value between 0 and 255 (default is 0) to set the TOS (type of service) field in
the RTP packet IP header. Possible values are described in Table 5.8
→
. If your IP net-
work uses differentiated services, you can also define the DSCP (differentiated servic-
es codepoint) for the RTP packets. The DSCP is the first six bits in the TOS octet.
VoipSilenceSuppression=<mode>
Activates silence suppression (see Table 4.17 on page 80
→
).
VoipSuppressCNG=<mode>
Enter On to suppress comfort noise generation. Default is Off. Requires VoipSilence-
Suppression=On.
Table 5.7 Customized parameters: VoIP quality (page 4 of 5)
VoIP Quality Parameters