Cisco Ata 191 And Ata 192 Analog Telephone Adapter Administration Guide For Multiplatform Firmware - Cisco ATA 191 Administration Manual

Voice Settings Configuration
Field
Insert VIA rport.
Substitute VIA Addr
Send Resp To Src Port
STUN Enable
STUN Test Enable
STUN Server

Cisco ATA 191 and ATA 192 Analog Telephone Adapter Administration Guide for Multiplatform Firmware

NAT Support Parameters
Description
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
Lets you use NAT-mapped IP:port values in the VIA
header. Select yes or no from the drop-down menu.
Default setting: No
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
Enables the use of STUN to discover NAT mapping.
Select Yes or No from the drop-down menu.
Default setting: No
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
IP address or fully-qualified domain name of the
STUN server to contact for NAT mapping discovery.
Default setting: blank
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