Operation Manual

Configuring the Voice Settings
SIP
Cisco SPA100 Series Administration Guide 58
1
Linksys Key System Parameters
STUN Server IP address or fully-qualified domain name of the STUN server to
contact for NAT mapping discovery.
Default setting: blank
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 device with a symmetric
NAT mechanism. If the ATA is the edge device, 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.
Default setting: blank
NAT Keep Alive
Intvl
Interval between NAT-mapping keep alive messages.
Default setting: 15
Redirect Keep Alive Enables or disables NAT Redirect keep alive messages.
Default setting: no
Field Description
Linksys Key System To enable operation with the Cisco SPA9000, choose yes.
Otherwise, choose no.
Default setting: no
Multicast Address The multicast address for devices in the Cisco SPA9000 voice
network.
Default setting: 224.168.168.168:6061
Field Description