Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA 300 Series, SPA 500 Series, and WIP310 IP Phone Administration Guide 95
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SIP Timer D  FRC 3261 wait time for response retransmits. Ranges from 0 to 
64 seconds. 
Defaults to 16 seconds.
SIP Timer J  RFC 3261 Wait time for Non-INVITE request retransmits. Ranges 
from 0 to 64 seconds.
Defaults to 16 seconds.
INVITE Expires  INVITE request Expires header value. If you enter 0, the Expires 
header is not included in the request. Ranges from 0 to 
19999999999999999999999999999999.
Defaults to 240 seconds. 
ReINVITE Expires  ReINVITE request Expires header value. If you enter 0, the Expires 
header is not included in the request. Ranges from 0 to 
19999999999999999999999999999999.
Defaults to 30
Reg Min Expires  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. 
Defaults to 1 second.
Reg Max Expires  Maximum registration expiration time allowed from the proxy in 
the Min-Expires header. If the value is greater than this setting, the 
maximum value is used. 
Defaults to 7200 seconds.
Reg Retry Intvl 
(see Note below)
Interval to wait before the Cisco IP phone retries registration after 
failing during the previous registration. Do not enter 0. Defaults to 
30 seconds.
Reg Retry Long 
Intvl
(see Note below)
When registration fails with a SIP response code that does not 
match the Retry Reg response status code (RSC) value (see next 
table), the Cisco IP phone waits for this length of time before 
retrying.
If this interval is 0, the Cisco IP phone stops trying. This value 
should be much larger than the Reg Retry Intvl value. Defaults to 
1200 seconds.
Parameter Description