Linksys SPA922 Cisco SPA9000 Voice System Administration Guide - Page 258
Dial Plan NAT Settings NOTIFY, PROXY
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SPA9000 Field Reference Voice tab B Voice tab > Line page Dial Plan section Dial Plan Dial plan script for this line. Default: (xx.) The Dial Plan strips off the steering digit prior to sending the dialed number to the ITSP. Voice tab > Line page NAT Settings section NAT Mapping Enable NAT Keep Alive Enable NAT Keep Alive Msg NAT Keep Alive Dest EXT SIP Port To use externally mapped IP addresses and SIP/RTP ports in SIP messages, select yes. Otherwise, select no. Default: no To send the configured NAT keep alive message periodically, select yes. Otherwise, select no. Default: no Enter the keep alive message that should be sent periodically to maintain the current NAT mapping. If the value is $NOTIFY, a NOTIFY message is sent. If the value is $REGISTER, a REGISTER message without contact is sent. Default: $NOTIFY Destination that should receive NAT keep alive messages. If the value is $PROXY, the messages are sent to the current or outbound proxy. Default: $PROXY Enter the port number of the external port to substitute for the actual SIP port of the SPA9000 in all outgoing SIP messages. Default: blank SPA9000 Voice System Administration Guide 256