Linksys SPA9000 Administration Manual page 169

STUN Enable
STUN Test Enable
STUN Server
EXT IP
EXT RTP Port Min
NAT Keep Alive Intvl
Voice tab > SIP page
PBX Parameters section
Field
Proxy Network Interface
Proxy Listen Port
Linksys Voice System Administration Guide
Enables the use of STUN to discover NAT mapping. Select yes or no from
the drop-down menu.
Default: no
If the STUN Enable feature is enabled and a valid STUN server is
available, the SPA9000 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 SPA9000 detects asymmetric NAT or
asymmetric firewall, NAT mapping is disabled.
Default: no
IP address or fully-qualified domain name of the STUN server to contact
for NAT mapping discovery.
Default: blank
External IP address to substitute for the actual IP address of the SPA9000
in all outgoing SIP messages. If 0.0.0.0 is specified, or the field is left
blank, no IP address substitution is performed.
NOTE: You must also configure port forwarding for SIP [5060-5063] and
RTP [16384-16482] when using the EXT IP field, or phone users may
experience one-way audio because the RTP stream will not find its way
between the two phones.
If this parameter is specified, the SPA9000 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.
Default: 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.
Default: blank
Interval between NAT-mapping keep alive messages.
Default: 15
Description
This setting tells the SPA9000 how the client stations are connected.
Choices: {LAN, WAN}. The SPA9000 communicates with client stations
via the selected interface only.
Default: WAN
NOTE: For optimum voice performance, Linksys Engineering and
Quality Assurance recommend that only WAN is used.
Port at which the SPA9000 listens for client messages at the selected
network interface. The proxy also sends SIP messages from this port.
Default: 6060
Voice tab
167