Cisco 7800 Series Administration Manual page 154

Cisco IP Phone Web Page
SIP Timer Values
Parameter
SIP T1
SIP T2
INVITE Expires
ReINVITE Expires
Reg Retry Intv
Reg Retry Long Intvl
Reg Retry Random Delay
Reg Retry Long Random Delay
Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide
140
Description
RFC 3261 T1 value (RTT estimate) that can range from 0 to 64 seconds.
Default: 0.5 seconds
RFC 3261 T2 value (maximum retransmit interval for non-INVITE
requests and INVITE responses) that can range from 0 to 64 seconds.
Default: 4 seconds
INVITE request Expires header value. If you enter 0, the Expires header
is not included in the request. Ranges from 0 to 2000000.
Default: 240 seconds
ReINVITE request Expires header value. If you enter 0, the Expires
header is not included in the request. Ranges from 0 to 2000000.
Default: 30
Interval to wait before the Cisco IP Phone retries registration after failing
during the last registration.The range is from 1 to 2147483647
Default: 30
See the note below for additional details.
When registration fails with a SIP response code that does not
match<Retry Reg RSC>, the Cisco IP Phone waits for the specified
length of time before retrying. If this interval is 0, the phone stops trying.
This value should be much larger than the Reg Retry Intvl value, which
should not be 0.
Default: 1200
See the note below for additional details.
Random delay range (in seconds) to add to <Register Retry Intvl> when
retrying REGISTER after a failure. Minimum and maximum random
delay to be added to the short timer. The range is from 0 to 2147483647.
Default: 0
Random delay range (in seconds) to add to <Register Retry Long Intvl>
when retrying REGISTER after a failure.
Default: 0