Linksys BUSINESS SPA922 - Manual (Page 57)

Linksys SPA9x2 Phone Administration Guide 50
Response Status Code Handling
Setting SIP Parameters
NOTE: SPA9x2 phones can use a RETRY-AFTER 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.
Response Status Code Handling
Reg Retry Random
Delay Random delay added to the Register Retry Intvl value when retrying
REGISTER after a failure.
Minimum and maximum random delay to be
added to the short timer.
Defaults to 0, which disables this feature.
Reg Retry Long
Random Delay Random delay add ed to Register Retry Long Intvl value when retrying
REGISTER after a failure.
Reg_Retry_Long_Random_Delay—
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.
Reg Retry Intvl Cap Reg_Retry_Intvl_Cap—Maximum value of the exponential 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 feature (that is, the
error retry interval is always at the Register Retry Intvl). If this feature is
enabled, the Reg Retry Random Delay is added on top of the exponential
backoff delay value.
Sub Min Expires The lower limit of the REGISTER (suscribe) expires value returned from the
proxy server.
Defaults to 10 seconds.
Sub Max Expires The upper limit of the REGISTER (subscribe) min-expires value returned
from the proxy server in the Min-Expires header.
Defaults to 7200 seconds.
Sub Retry Intvl The retry interval when the last Subscribe request fails.
Defaults to 10 seconds.
Parameter Description