Cisco SPA525G Administration Guide - Page 98

5 Configuring SIP, SPCP, and NAT Configuring SIP NOTE: Cisco IP phones can use a RETRYAFTER value when received from a SIP proxy server that is too busy to process a request (503 Service Unavailable message). If the response message includes a RETRY-AFTER header, the phone waits for the specified length of time before retrying to REGISTER again. If a RETRY-AFTER header is not present, the phone waits for the value specified in the Reg Retry Interval or the Reg Retry Long Interval parameter. Configuring Response Status Code Handling To configure response status code handling: STEP 1 Log in to the web administration interface. STEP 2 Click Admin Login and advanced. STEP 3 Click the SIP tab. STEP 4 Under Response Status Code Handling, configure the following: • SIT1 through SIT4 RSC-SIP response status code for the appropriate Special Information Tone (SIT). For example, if you set the SIT1 RSC to 404, when the user makes a call and a failure code of 404 is returned, the SIT1 tone is played. Reorder or Busy Tone is played by default for all unsuccessful response status code for SIT 1 RSC through SIT 4 RSC. Defaults to blank. • Try Backup RSC-SIP response code that retries a backup server for the current request. Defaults to blank. • Retry Reg RSC-Interval the SPA9000 waits before re-trying registration after a failed registration. Defaults to blank. STEP 5 Click Submit All Changes. 96 Cisco SPA and Wireless IP Phone Administration Guide