Cisco SPA301 Administration Manual page 125

Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Parameter Description
Reg Retry Long Random delay added to Register Retry Long Intvl value
Random Delay when retrying REGISTER after a failure.
Minimum and maximum random delay to be added to the
long timer. Random delay range (in seconds) to add to the
Register Retry Long Intvl when retrying REGISTER after a
failure. Defaults to 0, which disables this feature.
Not applicable to Cisco WIP310.
Reg Retry Intvl Reg_Retry_Intvl_Cap—Maximum value of the exponential
Cap delay. The maximum value to cap the exponential backoff
retry delay (which starts at the Register Retry Intvl and
doubles every retry). Defaults to 0, which disables the
exponential backoff (that is, the error retry interval is always
at the Register Retry Intvl). When this feature is enabled, the
Reg Retry Random Delay is added to the exponential
backoff delay value. The range is from 0 to 268435455.
Not applicable to Cisco WIP310.
Sub Min Expires Lower limit of the REGISTER (subscribe) expires value
returned from the proxy server. The range is from 0 to
268435455. Defaults to 10 seconds.
Sub Max Expires Upper limit of the REGISTER (subscribe) min-expires value
returned from the proxy server in the Min-Expires header.
The range is from 0 to 268435455. Defaults to 7200
seconds.
Sub Retry Intvl The retry interval when the last Subscribe request fails. The
range is from 0 to 268435455. Defaults to 10 seconds.
1. Cisco IP phones can use a RETRY-AFTER value when it is 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 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.
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