Cisco SPA2102-SF Administration Guide - Page 136

Send Resp To Src, Insert VIA rport

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ATA Voice Field Reference SIP page B Insert VIA rport 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. The default is no. Substitute VIA Addr Lets you use NAT-mapped IP:port values in the VIA header. Select yes or no from the drop-down menu. Send Resp To Src Port The default is no. Sends responses to the request source port instead of the VIA sent-by port. Select yes or no from the drop-down menu. STUN Enable The default is no. Enables the use of STUN to discover NAT mapping. Select yes or no from the drop-down menu. STUN Test Enable The default is no. If the STUN Enable feature is enabled and a valid STUN server is available, the ATA device 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 device detects symmetric NAT or a symmetric firewall, NAT mapping is disabled. STUN Server EXT IP The default is no. IP address or fully-qualified domain name of the STUN server to contact for NAT mapping discovery. External IP address to substitute for the actual IP address of the ATA device in all outgoing SIP messages. If 0.0.0.0 is specified, no IP address substitution is performed. If this parameter is specified, the ATA device assumes this IP address when generating SIP messages and SDP (if NAT Mapping is enabled for that line). However, the results of STUN and VIA received parameter processing, if available, supersede this statically configured value. The default is 0.0.0.0. Cisco Small Business ATA Administration Guide 136

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ATA Voice Field Reference
SIP page
Cisco Small Business ATA Administration Guide
136
B
Insert VIA rport
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.
The default is
no
.
Substitute VIA Addr
Lets you use NAT-mapped IP:port values in the VIA header.
Select yes
or
no from the drop-down menu.
The default is
no
.
Send Resp To Src
Port
Sends responses to the request source port instead of the
VIA sent-by port. Select yes
or
no from the drop-down
menu.
The default is
no
.
STUN Enable
Enables the use of STUN to discover NAT mapping. Select
yes
or no from the drop-down menu.
The default is
no
.
STUN Test Enable
If the STUN Enable feature is enabled and a valid STUN
server is available, the ATA device 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 device detects symmetric NAT or a
symmetric firewall, NAT mapping is disabled.
The default is
no
.
STUN Server
IP address or fully-qualified domain name of the STUN
server to contact for NAT mapping discovery.
EXT IP
External IP address to substitute for the actual IP address
of the ATA device in all outgoing SIP messages. If 0.0.0.0 is
specified, no IP address substitution is performed.
If this parameter is specified, the ATA device assumes this
IP address when generating SIP messages and SDP (if
NAT Mapping is enabled for that line). However, the results
of STUN and VIA received parameter processing, if
available, supersede this statically configured value.
The default is
0.0.0.0
.