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Voip para meters
The VoIP Protocol Parameters control various common aspects of the ATA device. These include:
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Audio Settings
RTP Protocol Parameters
SDP Protocol Parameters
SDP Audio Codec Names
Audio Settings:
Parameter
Description
Default
voip preferred codecs
List of numeric codec types in
order of preference
18 0
voip silence supression enable
Enables comfort noise/silence
processing
Disabled
voip echo canceller enable
Enables the G.168 echo canceller Enabled
voip echo canceller mode
Sets the echo canceller operating mode
2
voip echo canceller tail length
Specifies length of echo canceller in msec
16
voip fax processing mode
Control for FAX processing
method: off, pass through (uLaw
or Alaw) or real-time FAX (T.38)
Off
voip fax processing rate
Controls the fax processing rate
(0 to 5 for 2400 to 14400 respectively)
5
Parameter
Description
Default
rtp port minimum
The minimum RTP port number
to be used
1234
rtp port maximum
The maximum RTP port number
to be used
65535
rtp public external ip address
Force a specific external IP
address for SDP messages sent
(disabled when 0.0.0.0)
0.0.0.0
rtp public external port min
Specifies the fixed RTP port map- 0
ping performed by a NAT firewall
associated with the minimum
RTP port number (disabled when
0)
rtp tos value
Type of service (TOS) value or
DIFFServ DSFIELD used for SIP
messages as a hexidecimal value
0x68
rtp packet duration
The duration in msec for framebased codecs
30
rtp stream duration
The duration in msec for sample
stream-based codecs
20
rtp session timeout interval
The session timeout interval in
seconds
120
RTP Protocol Parameters:
39