Cisco 7800 Series Administration Manual page 155

Parameter
Reg Retry Intvl Cap
Sub Retry Intvl
The phone can use a RETRY-AFTER value when it is received from a SIP proxy server that is too busy
Note
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
Retry Reg RSC
RTP Parameters
Parameter
RTP Port Min
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
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
Interval to wait before the phone retries registration after failing during
the last registration.
Default: Blank
Description
Minimum port number for RTP transmission and reception. Minimum
port number for RTP transmission and reception. Should define a range
that contains at least 10 even number ports (twice the number of lines);
for example, configure RTP port min to 16384 and RTP port max to
16538.
Default: 16384
Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide
Cisco IP Phone Web Page
141