3Com VCX v7111 User Manual page 171

ini File Parameter Name
DisableNAT
EnableIPAddrTranslation
EnableUDPPortTranslation
NoOperationSendingMode
RTPNoOpEnable
NoOpInterval
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3Com VCX V7111 VoIP Gateway User Guide
Valid Range and Description
Enables / disables the Network Address Translation (NAT) mechanism.
[0] = Enabled.
[1] = Disabled (default).
The compare operation that is performed on the IP address is
enabled by default and is controlled by the parameter
EnableIPAddrTranslation. The compare operation that is
performed on the UDP port is disabled by default and is
controlled by the parameter EnableUDPPortTranslation.
[0] = Disable IP address translation.
[1] = Enable IP address translation for RTP, RTCP and T.38 packets
(default).
[2 ]= Enable IP address translation for ThroughPacket™.
[3] = Enable IP address translation for all protocols (RTP, RTCP, T38
and ThroughPacket™).
When enabled, the gateway compares the source IP address of the first
incoming packet, to the remote IP address stated in the opening of the
channel. If the two IP addresses do not match, the NAT mechanism is
activated. Consequently, the remote IP address of the outgoing stream
is replaced by the source IP address of the first incoming packet.
The NAT mechanism must be enabled for this parameter to
take effect (DisableNAT = 0).
[0] = Disable UDP port translation (default).
[1] = Enable UDP port translation.
When enabled, the gateway compares the source UDP port of the first
incoming packet, to the remote UDP port stated in the opening of the
channel. If the two UDP ports do not match, the NAT mechanism is
activated. Consequently, the remote UDP port of the outgoing stream is
replaced by the source UDP port of the first incoming packet.
The NAT mechanism and the IP address translation must be
enabled for this parameter to take effect (DisableNAT = 0,
EnableIpAddrTranslation = 1).
Enables or disables the transmission of RTP or T.38 No-Op packets.
Valid options include:
[0] = Disable (default)
[1] = Enable
This mechanism ensures that the NAT binding remains open during
RTP or T.38 silence periods.
This parameter is now obsolete. Please use the parameter
NoOperationSendingMode.
Defines the time interval in which RTP or T.38 No-Op packets are sent
in the case of silence (no RTP / T.38 traffic) when No-Op packet
transmission is enabled.
The valid range is 20 to 65,000 msec. The default is 10,000.
To enable No-Op packet transmission, use the
NoOperationSendingMode parameter.
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