Cisco CP-7911G-CH1 Administration Guide - Page 109
Prerequisites, Restrictions, SUMMARY STEPS
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Setting Up Cisco Unified IP Phones using SIP How to Configure the SIP Registrar Prerequisites Restrictions • The SIP registrar must be configured before a voice register pool is set up. See the "Configuring the SIP Registrar" section on page 106 for complete instructions. • The id command identifies the individual SIP IP phone or sets of SIP IP phones that are to be configured. Thus, the id command configured in Step 5 is required and must be configured before any other voice register pool commands. When the mac address keyword and argument are used, the IP phone must be in the same subnet as that of the router's LAN interface, such that the phone's MAC address is visible in the router's Address Resolution Protocol (ARP) cache. Once a MAC address is configured for a specific voice register pool, remove the existing MAC address before changing to a new MAC address. • Proxy dial peers are autogenerated dial peers that route all calls from the PSTN to Cisco Unified SIP SRST. When a SIP phone registers to Cisco Unified SIP SRST and the proxy command is enabled, two dial peers are automatically created. The first dial peer routes to the proxy, and the second (or fallback) dial peer routes to the SIP phone. The same functionality can also be achieved with the appropriate creation of static dial peers (manually creating dial peers that point to the proxy). Proxy dial peers can be monitored to one proxy IP address, only. That is, only one proxy from a voice registration pool can be monitored at a time. If more than one proxy address needs to be monitored, you must manually create and configure additional dial peers. Note To monitor SIP proxies, the call fallback active command must be configured, as described in Step 3. SUMMARY STEPS 1. enable 2. configure terminal 3. call fallback active 4. voice register pool tag 5. id {network address mask mask | ip address mask mask | mac address} 6. preference preference-order 7. proxy ip-address [preference value] [monitor probe {icmp-ping | rtr} [alternate-ip-address]] 8. voice-class codec tag 9. application application-name 10. end OL-13143-04 Cisco Unified SCCP and SIP SRST System Administrator Guide 109