Linksys SPA 900 manual SIP Timer Values sec, SIP T1, SIP T2, SIP T4

Chapter 5 Linksys IP Phone Field Reference

SIP Tab

SIP Timer Values (sec)

Note None of the following parameters apply to the SPA901.

Field	Description
SIP T1	RFC 3261 T1 value (RTT estimate), which can range from 0 to 64 seconds. Defaults to .5
	seconds.
SIP T2	RFC 3261 T2 value (maximum retransmit interval for non-INVITE requests and INVITE
	responses), which can range from 0 to 64 seconds. Defaults to 4 seconds.
SIP T4	RFC 3261 T4 value (maximum duration a message remains in the network), which can
	range from 0 to 64 seconds. Defaults to 5 seconds.
SIP Timer B	INVITE time-out value, which can range from 0 to 64 seconds. Defaults to 16 seconds.
SIP Timer F	Non-INVITE time-out value, which can range from 0 to 64 seconds.Defaults to 16
	seconds.
SIP Timer H	INVITE final response, time-out value, which can range from 0 to 64 seconds.Defaults to
	16 seconds.
SIP Timer D	ACK hang-around time, which can range from 0 to 64 seconds. Defaults to 16 seconds.
SIP Timer J	Non-INVITE response hang-around time, which can range 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.
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.
Reg Max Expires	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.
	Defaults to 7200.
Reg Retry Intvl	Interval to wait before the Linksys IP phone retries registration after failing during the last
	registration.
	Defaults to 30.
Reg Retry Long Intvl	When registration fails with a SIP response code that does not match<Retry Reg RSC>,
	the Linksys IP phone waits for the specified length of time before retrying. If this interval
	is 0, the Linksys IP phone stops trying. This value should be much larger than the Reg
	Retry Intvl value, which should not be 0.
	Defaults to 1200.
	Linksys IP Phone Administrator Guide
Firmware Version 5.1		5-11