Linksys Key System Parameters - Linksys SPA921-NA Administrator's Manual

SIP Tab
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
Linksys 900 Series IP Phone Administrator Guide
5-18
If the STUN Enable feature is enabled and a valid STUN server is available, the
900 Series 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 900 Series
phone detects symmetric NAT or a symmetric firewall, NAT mapping is disabled.
The default is 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 900 Series 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 900 Series 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.
The default is 0.0.0.0.
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.
The default is 0.
Interval between NAT-mapping keep alive messages.
The default is 15.
Description
Enable or disable the Linksys Key System on the IP phone.
The default is yes.
The multicast address is used by the SPA9000 to communicate with the SPA900
Series IP phones.
The default is 224.168.168.168:6061.
The choices are: none, G.711u, or G.711a. The default is none.
Chapter 5 SPA900 Series Phone Field Reference
Document Version 3.0