System information
Table Of Contents
- Getting Started with the Cisco SPA100 Series Phone Adapters
- Quick Setup for Voice over IP Service
- Configuring the Network
- Configuring Voice
- Administration Settings
- Viewing the Status and Statistics
- Frequently Asked Questions
- Using the IVR for Administration
- Installation Options
- Where to Go From Here
Configuring Voice
Configuring Voice Settings
Cisco SPA100 Series Phone Adapters Administration Guide 72
4
STUN Test Enable If the STUN Enable feature is enabled and a valid STUN
server is available, the ATA 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 ATA detects
symmetric NAT or a symmetric firewall, NAT mapping
is disabled. Default setting: no.
STUN Server IP address or fully-qualified domain name of the STUN
server to contact for NAT mapping discovery.
EXT IP External IP address to substitute for the actual IP
address of the ATA in all outgoing SIP messages. If
0.0.0.0 is specified, no IP address substitution is
performed.
If this parameter is specified, the ATA 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.
This option requires that you have (1) a static IP
address from your Internet Service Provider and (2) an
edge ATA with a symmetric NAT mechanism. If the ATA
is the edge ATA, the second requirement is met.
Default setting: blank
EXT RTP Port Min 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.
There is no default value.
NAT Keep Alive Intvl Interval between NAT-mapping keep alive messages.
Default setting: 15.
Field Description