Cisco SR520-FE-K9 Administration Manual page 129

Configuring Voice
Configuring Voice Settings
Cisco SRP500 Series Services Ready Platforms Administration Guide (SRP520 Models)
Handle VIA rport
Insert VIA received
Insert VIA rport
Substitute VIA Addr
Send Resp To Src Port
STUN Enable
STUN Test Enable
If you select yes, the SRP processes the rport
parameter in the VIA header (this value is inserted by
the server in a response to anyone of its requests). If
you select no, the parameter is ignored. Select yes or
no from the drop-down menu.
The default is 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.
The default is no.
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.
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.
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.
Enables the use of STUN to discover NAT mapping.
Select yes or no from the drop-down menu.
The default is no.
If the STUN Enable feature is enabled and a valid STUN
server is available, the SRP 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 SRP detects
symmetric NAT or a symmetric firewall, NAT mapping
is disabled.
The default is no.
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