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A D D I T I O N A L V O I P P A R A M E T E R S
C H A P T E R 1 4
228
ECOTEL 3G 16.1. Revised: 2011.
1 4 . 4 Q U A L I T Y P A R A M E T E R S
Table 14.6
Customized Parameters: VoIP Quality
VoIP Quality Parameters
VoipSilenceSuppression=<mode>
Activates silence suppression (see Table 5.22).
VoipBandwidthRestriction=<mode>
Enter
Yes
to include the VoIP profile in traffic shaping. Default is
No
. For a description of the functionality,
please refer to
VoipMaximumBandwidth
in Table 5.18.
VoipMediaWaitForConnect=<mode>
This parameter allows you to influence the system’s behavior in relation to voice channel negotiation (RTP
stream).
The following settings are possible:
No
(default): RTP data is transmitted immediately after negotiation for RTP. SIP: Early Media is activated; SDP
is sent with 183 or 180.
Yes
: The negotiation of RTP data is sent only after the connection has been established. SIP: SDP is sent only
with 200 and ack.
Tone
: The VoIP peer or the connected PBX requires generation of inband signaling tones (alert, busy, re-
lease).
NOTE: If
Tone
is entered, the tones are not played in the direction of the PBX if RTP is already
exchanged before connect (inband is switched through).
Bear in mind that the parameter
SWITCH
in the VoIP controller’s
Subscriber
line must be re-
moved if the tones are played for the PBX.
If
Tone
is entered and the tones are played to VoIP, the VoIP media channel cannot be released
following an ISDN call disconnect as long as the tones are being transmitted. This can result in
CDR errors on the peer side.
VoipRtpTos=<num>
Enter a value between 0 and 255 to set the TOS (type of service) field in the RTP packet IP header. Possible
values are described in Table 14.7. If your IP network uses diferentiated services, you can also define the
DSCP (differentiated services codepoint) for the RTP packets. The DSCP is the first six bits in the TOS octet.
NOTE:
VoipUseIpStack
must be 0 (default).
VoipRtcpTos=<num>
Enter a value between 0 and 255 to set the TOS (type of service) field in the RTCP packet IP header. Possible
values are described in Table 14.7. If your IP network uses diferentiated services, you can also define the
DSCP (differentiated services codepoint) for the RTCP packets. The DSCP is the first six bits in the TOS octet.
NOTE:
VoipUseIpStack
must be 0 (default).
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