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  | Chapter 6 SPA9000 Field Reference | 
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  | SIP Tab  | 
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EXT IP | External IP address to substitute for the actual IP address of the SPA9000 in all outgoing  | ||
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  | SIP messages. If 0.0.0.0 is specified, no IP address substitution is performed.  | |
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  | If this parameter is specified, the SPA9000 assumes this IP address when generating SIP  | |
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  | messages and SDP (if NAT Mapping is enabled for that line). However, the results of  | |
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  | STUN and VIA received parameter processing, if available, supersede this statically  | |
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  | configured value.  | |
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  | The default is 0.0.0.0.  | |
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EXT RTP Port Min  | External port mapping number of the RTP Port Min. number. If this value is not zero, the  | ||
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  | RTP port number in all outgoing SIP messages is substituted for the corresponding port  | |
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  | value in the external RTP port range.  | |
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  | The default is 0.  | |
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NAT Keep Alive Intvl  | Interval between   | ||
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  | The default is 15.  | |
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PBX Parameters | 
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Field | Description  | ||
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Proxy Network Interface  | This setting tells the SPA9000 how the client stations are connected. Choices: {LAN,  | ||
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  | WAN}. Default is WAN. The SPA9000 communicates with client stations via the selected  | |
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  | interface only.  | |
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Proxy Listen Port  | Port at which the SPA9000 listens for client messages at the selected network interface.  | ||
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  | The proxy also sends SIP messages from this port.  | |
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  | The default is 6060.  | |
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Multicast Address  | IP address (and port number) where the SPA9000 sends control messages to all the client  | ||
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  | stations at once. This must be a multicast address and must contain a port number.  | |
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  | The default is 224.168.168.168:6061.  | |
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Group Page Address  | IP address (and port number) where the SPA9000 tells the client stations to send and  | ||
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  | receive group page RTP packets. This must be a multicast address and must contain a port  | |
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  | number.  | |
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  | The default is 224.168.168.168:34567.  | |
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Max Expires  | Sets the maximum allowed Registration expires value in seconds for client stations.  | ||
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  | Linksys recommends using a smaller value, such as 60 or 120.  | |
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  | The default is 3600.  | |
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Force Media Proxy  | Forces external client stations to use the SPA9000 Media Proxy when exchanging RTP  | ||
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  | traffic with external peers. Linksys recommends using a smaller value, such as 60 or 120.  | |
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  | The default is no.  | |
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  | Linksys SPA9000 Administrator Guide  | 
Document Version 3.01 |