Cisco SPA8800 Administration Guide - Page 34
Introducing Cisco Small Business Analog Telephone Adapters, ATA Voice, Field Reference,
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Introducing Cisco Small Business Analog Telephone Adapters ATA Software Features 1 Feature Register Retry Enhancements Description The Register Retry Enhancements feature for SPA2102, SPA3102, and PAP2T devices adds flexibility to the delay timers that are activated when the SIP REGISTER of a device fails. Once a SIP REGISTER failure response code is sent, a delay timer is selected depending on the type of registration failure response code. The delay timers can be one of the following: • Reg Retry Random Delay-Random delay range (in seconds) to add to the Register Retry Intvl parameter when retrying a SIP REGISTER after a failure. The default is 0, which disables this feature. • Reg Retry Long Random Delay-Random delay range (in seconds) to add to the Register Retry Long Intvl parameter when retrying a SIP REGISTER after a failure. The default is 0, which disables this feature. • Reg Retry Intvl Cap-The maximum value to cap the exponential back-off retry delay. The exponential back-off retry delay starts with the setting found in the Register Retry Intvl parameter and doubles it on every REGISTER retry after a failure. In other words, the retry interval after a failure is always set to the seconds configured in the Register Retry Intvl parameter. If this feature is enabled, the Reg Retry Random Delay setting is added on top of the exponential back-off adjusted delay value. The default value is 0, which disables the exponential back-off feature. Register Retry is configured in the SIP tab. See "ATA Voice Field Reference," on page 115. Cisco Small Business ATA Administration Guide 34