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SmartLink 4020 Getting Started Guide 6 • Telephony
SIP Configuration
Figure 23. SIP Configuration section of the SIP window
SIP Server Settings
The SmartLink 4020 will automatically attempt to locate the VoIP server by using the domain name specified
in the WAN interface or the server will be discovered via DHCP on the WAN interface. When found, the dis-
covered server will be listed as the Current Server.
Enter the following information:
• Server address—The IP address or domain name hosting the VoIP SIP server
• Port—The UDP port of the VoIP SIP server. The default is 5060.
• Domain name—The VoIP domain name (realm) is used for validation of each phone’s username
• Send Registration Request with Expire Time—If selected, determines the amount of time (in seconds) that
the SIP registration will be valid for.
• Unregistration—If checked, the SmartLink will send a SIP unregister at system reload before sending a SIP
registration request.
• Send SUBSCRIBE—If checked, the SmartLink will send a SIP subscribe to the server specified. This box
must be checked for the voicemail message counted and message waiting notification to work.
• SUBSCRIBE Server IP or FQDN—The IP address or fully qualified domain name of the subscription ser-
vice. If not specified, the SIP subscribes to the SIP server.
Figure 24. Gateway Settings section of the SIP window
Gateway Settings
Dial Plan. Refer to appendix C, “Dial plans” on page 94