Cisco SPA1112 Provisioning Manual page 95

Voice Parameters
<STUN_Server>
<EXT_IP>
<EXT_RTP_Port_Min>
<NAT_Keep_Alive_Intvl>
<Redirect_Keep_Alive>
<Linksys_Key_System>
<Multicast_Address>
<Key_System_Auto_Discovery>
Provisioning Guide for Cisco SPA100 and SPA200 Series Analog Telephone Adapters
IP address or fully-qualified domain name of the STUN server
to contact for NAT mapping discovery.
Default setting: blank
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 device with a
symmetric NAT mechanism. If the ATA is the edge device, the
second requirement is met.
Default setting: 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 setting: blank
Interval between NAT-mapping keep alive messages.
Default setting: 15
Interval between NAT Redirect keep alive messages.
Default setting: 15
To enable operation with the Cisco SPA9000, choose yes.
Otherwise, choose no.
Default setting: no
The multicast address for devices in the Cisco SPA9000 voice
network.
Default setting: 224. 1 68. 1 68. 1 68:6061
To enable auto-discovery of the Cisco SPA9000 voice
system, choose yes. Otherwise, choose no.
Default setting: yes
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