Cisco SPA942-RC Administration Guide - Page 209
Reg Retry Long Intvl See, Reg Retry Long Random
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SPA and Wireless IP Phone Field Reference SIP Tab B Parameter Reg Retry Long Intvl (See note below) Reg Retry Random Delay Reg Retry Long Random Delay Reg Retry Intvl Cap Sub Min Expires Sub Max Expires Sub Retry Intvl Description When registration fails with a SIP response code that does not match, the SPA9000 waits for the specified length of time before retrying. If this interval is 0, the SPA9000 stops trying. This value should be much larger than the Reg Retry Intvl value, which should not be 0. Defaults to 1200. Random delay range (in seconds) to add to when retrying REGISTER after a failure. This feature was added in Release 5.1. Defaults to blank, which disables this feature. Random delay range (in seconds) to add to when retrying REGSITER after a failure. This feature was added in Release 5.1. Defaults to blank, which disables this feature. The maximum value to cap the exponential back-off retry delay (which starts at and doubles on every REGISTER retry after a failure). In other words, the retry interval is always at seconds after a failure. If this feature is enabled, is added on top of the exponential back-off adjusted delay value. This feature was added in Release 5.1. Defaults to blank, which disables the exponential backoff feature. This value sets the lower limit of the REGISTER expires value returned from the Proxy server. This value sets the upper limit of the REGISTER minexpires value returned from the Proxy server in the Min-Expires header. Defaults to 7200. This value (in seconds) determines the retry interval when the last Subscribe request fails. Defaults to 10. Cisco SPA and Wireless IP Phone Administration Guide 207