Linksys Key System Parameters - Linksys SPA 900 Series Administration Manual

Chapter 5 Linksys IP Phone Field Reference
Field
STUN Enable
STUN Test Enable
STUN Server
EXT IP
EXT RTP Port Min
NAT Keep Alive Intvl

Linksys Key System Parameters

Field
Linksys Key System
Multicast Address
Force LAN Codec
Firmware Version 5.1
Description
Enables the use of STUN to discover NAT mapping. Select yes or no from the drop-down
menu.
Defaults to no.
If the STUN Enable feature is enabled and a valid STUN server is available, the Linksys
IP phone 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 Linksys IP phone detects symmetric NAT or
a symmetric firewall, NAT mapping is disabled.
Defaults to no.
IP address or fully-qualified domain name of the STUN server to contact for NAT
mapping discovery.
External IP address to substitute for the actual IP address of the Linksys IP phone in all
outgoing SIP messages. If 0.0.0.0 is specified, no IP address substitution is performed.
If this parameter is specified, the Linksys IP phone assumes this IP address when
generating SIP messages and SDP (if NAT Mapping is enabled for that line). However,
the results of STUN and VIA received parameter processing, if available, supersede this
statically configured value.
Defaults to blank.
External port mapping number of the RTP Port Min. number. If this value is not zero, the
RTP port number in all outgoing SIP messages is substituted for the corresponding port
value in the external RTP port range.
Defaults to blank.
Interval between NAT-mapping keep alive messages.
Defaults to 15.
Description
Enable or disable the Linksys Key System on the IP phone.
Defaults to yes.
The multicast address is used by the SPA9000 to communicate with the Linksys IP IP
phones.
Defaults to 224.168.168.168:6061.
The choices are: none, G.711u, or G.711a. Defaults to none.
Linksys IP Phone Administrator Guide
SIP Tab
5-17