Operation Manual

Configuring the Voice Settings
SIP
Cisco SPA100 Series Administration Guide 57
1
NAT Support Parameters
Field Description
Handle VIA received If you select yes, the ATA processes the received parameter in the
VIA header (this value is inserted by the server in a response to any
one of its requests) If you select no, the parameter is ignored.
Select yes or no from the drop-down menu.
Default setting: no
Handle VIA rport If you select yes, the ATA processes the rport parameter in the VIA
header (this value is inserted by the server in a response to any one
of its requests) If you select no, the parameter is ignored. Select yes
or no from the drop-down menu.
Default setting: no
Insert VIA received 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.
Default setting: no
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.
Default setting: 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.
Default setting: 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.
Default setting: no
STUN Enable Enables the use of STUN to discover NAT mapping. Select yes or
no from the drop-down menu.
Default setting: no
STUN Test 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