Operation Manual

Cisco SPA IP Phone Field Reference
SIP Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 245
A
Insert VIA rport Inserts the rport 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.
Defaults to 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.
Defaults to 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.
Defaults to no.
STUN Enable Enables the use of STUN to discover NAT
mapping. Select yes or no from the drop-down
menu.
Defaults to no.
STUN Test Enable If the STUN Enable feature is enabled and a valid
STUN server is available, the SPA9000 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 SPA9000 detects symmetric NAT
or a symmetric firewall, NAT mapping is disabled.
Defaults to no.
STUN Server IP address or fully-qualified domain name of the
STUN server to contact for NAT mapping
discovery. You can use a public STUN server or
set up your own STUN server.
Parameter Description
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