Cisco 521SG Administration Guide - Page 296

Cisco SPA IP Phone Field Reference Ext Tab A SIP Settings Parameter Description SIP Transport Select from UDP, TCP, or TLS. Defaults to UDP. SIP Port Port number of the SIP message listening and transmission port. Defaults to 5060. SIP 100REL Enable To enable the support of 100REL SIP extension for reliable transmission of provisional responses (18x) and use of PRACK requests, select yes. Otherwise, select no. Defaults to no. EXT SIP Port The external SIP port number. Auth ResyncReboot If this feature is enabled, the Cisco SPA9000 authenticates the sender when it receives the NOTIFY resync reboot (RFC 2617) message. To use this feature, select yes. Otherwise, select no. Defaults to yes. SIP Proxy-Require The SIP proxy can support a specific extension or behavior when it sees this header from the user agent. If this field is configured and the proxy does not support it, it responds with the message, unsupported. Enter the appropriate header in the field provided. SIP Remote-Party- To use the Remote-Party-ID header instead of the From ID header, select yes. Otherwise, select no. Defaults to yes. Referor Bye Delay Controls when the SPA9000 sends BYE to terminate stale call legs upon completion of call transfers. Multiple delay settings (Referor, Refer Target, Referee, and Refer-To Target) are configured on this screen. For the Referor Bye Delay, enter the appropriate period of time in seconds. Defaults to 4. Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 295