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The SRST Cisco Unified CallManager always appears last in the list of servers, even if it is active. You configure an SRST router address in the Cisco Unified CallManager Administration SRST Reference Configuration page (choose System > SRST). You configure an SRST reference in the Device Pool Configuration page (choose System > Device Pool). TFTP Indicates that the phone was unable to register with a Cisco Unified CallManager listed in its configuration file and that it registered with the TFTP server instead. (Authentication icon) Indicates that the connection to the Cisco Unified CallManager is authenticated. For more information about authentication, refer to Cisco Unified CallManager Security Guide. (Encryption icon) Indicates that the connection to the Cisco Unified CallManager is authenticated and encrypted. For more information about authentication and encryption, refer to Cisco Unified CallManager Security Guide. Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones OL-11524-01 4-17 Chapter 4 Configuring Settings on the Cisco Unified IP Phone Device Configuration Menu SIP Configuration Menu The SIP Configuration menu contains these sub-menus: • SIP General Configuration Menu, page 4-18 • Line Settings Menu, page 4-20 SIP General Configuration Menu The SIP General Configuration menu displays information about the configurable SIP parameters on the phone. Table 4-5 describes the options in this menu. Table 4-5 SIP General Configuration Menu Options Option Description To Change Preferred CODEC Displays the CODEC to use when a call is initiated. This value will always be set to none. Display only—cannot configure. Out of Band DTMF Displays the configuration of the out-of-band signaling (for tone detection on the IP side of a gateway). The Cisco Unified SIP IP phone supports out-of-band signaling using the AVT tone method. This value will always be set to avt. Display only—cannot configure. Register with Proxy Displays if the phone must register with a proxy server during initialization. This value will always be set to true. Display only—cannot configure. Register Expires Displays the amount of time, in seconds, after which a registration request expires. Use Cisco Unified CallManager Administration > Device > Device Settings > SIP Profile. Phone Label Displays the text that is displayed on the top right status line of the LCD on the phone. This text is for end-user display only and has no effect on caller identification or messaging. This value will always be set to null. Display only—cannot configure. 4-18 Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones OL-11524-01 Chapter 4 Configuring Settings on the Cisco Unified IP Phone Device Configuration Menu Table 4-5 SIP General Configuration Menu Options (continued) Option Description To Change Enable VAD Displays if voice activation detection (VAD) is enabled. Use Cisco Unified CallManager Administration > Device > Device Settings > SIP Profile. Start Media Port Displays the start Real-Time Transport Protocol (RTP) range for media. Use Cisco Unified CallManager Administration > Device > Device Settings > SIP Profile. End Media Port Displays the end Real-Time Transport Protocol (RTP) range for media. Use Cisco Unified CallManager Administration > Device > Device Settings > SIP Profile. Backup Proxy Displays the IP address of the backup proxy server or gateway. This value will always be set to USECALLMANAGER. Display only—cannot configure. Backup Proxy Port Displays the port number of the backup proxy server or gateway. This value will always be set to 5060. Display only—cannot configure. Emergency Proxy Displays the IP address of the emergency proxy server or gateway. This value will always be set to USECALLMANAGER. Display only—cannot configure. Emergency Proxy Port Displays the port number of the emergency proxy server or gateway. This value will always be set to 5060. Display only—cannot configure. Outbound Proxy Displays the IP address of the outbound proxy server. This value will always be set to USECALLMANAGER. Display only—cannot configure. Outbound Proxy Port Displays the port number of the outbound proxy server. This value will always be set to 5060. Display only—cannot configure. NAT Enabled Displays if Network Address Translation (NAT) is enabled. This value will always be set to false. Display only—cannot configure. Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones OL-11524-01 4-19 Chapter 4 Configuring Settings on the Cisco Unified IP Phone Device Configuration Menu Table 4-5 SIP General Configuration Menu Options (continued) Option Description To Change NAT Address Displays the WAN IP address of the NAT or firewall server. This value will always be set to null. Display only—cannot configure. Call Statistics Displays if call statistics are enabled on the phone. Use Cisco ...