Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco SPA 500 Series and WIP310 IP Phone Administration Guide
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NOTE
Cisco IP 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
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.
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.
NOTE
Not applicable to WIP310.
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.
NOTE
Not applicable to WIP310.
Sub Min Expires
The lower limit of the REGISTER (subscribe) 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
