Cisco WIP310 - iPhone Wireless VoIP Phone Administration Manual page 227

Cisco SPA 500 Series and Wireless IP Phone Field Reference
SIP Tab
Cisco SPA 500 Series and WIP310 IP Phone Administration Guide
Parameter
Reg Max Expires
Reg Retry Intvl (See note
below)
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
Description
Maximum registration expiration time allowed from the
proxy in the Min-Expires header. If the value is larger
than this setting, the maximum value is used.
Defaults to 7200.
Interval to wait before the IP phone retries registration
after failing during the last registration.
Defaults to 30.
When registration fails with a SIP response code that
does not match<Retry Reg RSC>, the IP phone waits
for the specified length of time before retrying. If this
interval is 0, the IP phone 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 <Register
Retry Intvl> 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 <Register
Retry Long Intvl> 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 <Register Retry Intvl> and
doubles on every REGISTER retry after a failure). In
other words, the retry interval is always at <Register
Retry Intvl> seconds after a failure. If this feature is
enabled, <Reg Retry Random Delay> 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 back-
off 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 min-
expires value returned from the Proxy server in the
Min-Expires header. Defaults to 7200.
B
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