DescriptionField
Inserts the parameter into the VIA header of SIP
responses if the received-from IP and VIA sent-by IP
values differ.
Select Yes or No from the drop-down menu.
Default setting: No
Insert VIA rport.
Lets you use NAT-mapped IP:port values in the VIA
header. Select yes or no from the drop-down menu.
Default setting: No
Substitute VIA Addr
Sends responses to the request source port instead of
the VIA sent-by port.
Select Yes or No from the drop-down menu.
Default setting: No
Send Resp To Src Port
Enables the use of STUN to discover NAT mapping.
Select Yes or No from the drop-down menu.
Default setting: No
STUN Enable
If the STUN Enable feature is enabled and a valid
STUN server is available, the ATA can perform a
NAT-type discovery operation when it powers on. It
contacts the configured STUN server, and the result
of the discovery is reported in a Warning header in
all subsequent REGISTER requests. If the ATA
detects symmetric NAT or a symmetric firewall, NAT
mapping is disabled.
Default setting: No
STUN Test Enable
IP address or fully-qualified domain name of the
STUN server to contact for NAT mapping discovery.
Default setting: blank
STUN Server
Cisco ATA 191 and ATA 192 Analog Telephone Adapter Administration Guide for Multiplatform Firmware
47
Voice Settings Configuration
NAT Support Parameters
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