Instruction Manual

5-16
Linksys IP Phone Administrator Guide
Firmware Version 5.1
Chapter 5 Linksys IP Phone Field Reference
SIP Tab
NAT Support Parameters
Note None of the following parameters apply to the SPA901.
G729a Codec Name
(not applicable to SPA901)
G.729a codec name used in SDP.
Defaults to G729a.
G729b Codec Name
(not applicable to SPA901)
G.729b codec name used in SDP.
Defaults to G729ab.
G723 Codec Name
(not applicable to SPA901)
G.723 codec name used in SDP.
Defaults to G723.
EncapRTP Codec Name
(not applicable to SPA901)
EncapRTP codec name used in SDP.
Defaults to encaprtp.
Field Description
Field Description
Handle VIA received If you select yes, the Linksys IP 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.
Handle VIA rport If you select yes, the Linksys 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.
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.
Defaults to no.
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.