Cisco 6800 Series Administration Manual page 250

Response Status Code Handling
Parameter
Reg Retry Intvl Cap
Sub Min Expires
Sub Max Expires
Sub Retry Intvl
Note The phone 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.
Response Status Code Handling
Parameter
Try Backup RSC
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
236
Description
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 (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 2147483647.
Default: 0
Sets the lower limit of the REGISTER expires value
returned from the Proxy server.
Sets the upper limit of the REGISTER minexpires
value returned from the Proxy server in the
Min-Expires header.
Default: 7200.
This value (in seconds) determines the retry interval
when the last Subscribe request fails.
Default: 10.
Description
This parameter may be set to invoke failover upon
receiving specified response codes.
Default: Blank
For example, you can enter numeric values 500 or a
combination of numeric values plus wild cards if
multiple values are possible. For the later, you can
use 5?? to represent all SIP Response messages within
the 500 range. If you want to use multiple ranges, you
can add a comma "," to delimit values of 5?? and 6??
Phone Troubleshooting