Nat Support Parameters - Cisco SPA 525G2 Administration Manual

Cisco SPA IP Phone Field Reference
SIP Tab
Cisco Small Business SPA 300 Series, SPA 500 Series, and WIP310 IP Phone Administration Guide

NAT Support Parameters

Parameter
Handle VIA received
Handle VIA rport
Insert VIA received
Insert VIA rport
Substitute VIA Addr
Send Resp To Src Port
STUN Enable
Description
If you select yes, the phone processes the received
parameter in the VIA header (this is inserted by the
server in a response to any of its requests). If you
select no, the parameter is ignored. Select yes or no
from the drop-down menu.
Defaults to no.
If you select yes, the IP phone processes the rport
parameter in the VIA header (this is inserted by the
server in a response to any of its requests). If you
select no, the parameter is ignored. Select yes or no
from the drop-down menu.
Defaults to no.
Inserts the received 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.
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.
Lets you use NAT-mapped IP:port values in the VIA
header. Select yes or no from the drop-down menu.
Defaults to no.
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.
Enables the use of STUN to discover NAT mapping.
Select yes or no from the drop-down menu.
Defaults to no.
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