Cisco 8800 Series Administration Manual page 292

SIP Timer Values (sec)
Parameter
SIP Timer H
SIP Timer D
SIP Timer J
INVITE Expires
ReINVITE Expires
Reg Min Expires
Reg Max Expires
Reg Retry Intv
Reg Retry Long Intvl
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
276
Cisco IP Phone Troubleshooting
Description
INVITE final response, time-out value, which can
from 0 to 64 seconds.
Default: 16 seconds.
ACK hang-around time, which can range from 0 to
64 seconds.
Default: 16 seconds.
Non-INVITE response hang-around time, which can
range from 0 to 64 seconds.
Default: 16 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
Minimum registration expiration time allowed from
the proxy in the Expires header or as a Contact header
parameter. If the proxy returns a value less than this
setting, the minimum value is used.
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.
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.