Sip Timer Values (Sec) - Linksys SPA9000 Administrator's Manual

SIP Tab
Hook Flash MIME Type
Remove Last Reg
Use Compact Header
Escape Display Name
RFC 2543 Call Hold
SIP TCP Port Min
SIP TCP Port Max
CTI Enable

SIP Timer Values (sec)

Field
SIP T1
SIP T2
SIP T4
Linksys SPA9000 Administrator Guide
6-8
MIME Type used in a SIP INFO message to signal a hook flash event.
The default is application/hook-flash.
Lets you remove the last registration before registering a new one if the value is different.
Select yes or no from the drop-down menu.
The default is no.
Lets you use compact SIP headers in outbound SIP messages. Select yes or no from the
drop-down menu. If set to yes, the SPA9000 uses compact SIP headers in outbound SIP
messages. If set to no, the SPA9000 uses normal SIP headers. If inbound SIP requests
contain compact headers, SPA9000 reuses the same compact headers when generating the
response regardless the settings of the <Use Compact Header> parameter. If inbound SIP
requests contain normal headers, SPA9000 substitutes those headers with compact
headers (if defined by RFC 261) if <Use Compact Header> parameter is set to yes.
The default is no.
Lets you keep the Display Name private. Select yes if you want the SPA9000 to enclose
the string (configured in the Display Name) in a pair of double quotes for outbound SIP
messages. Any occurrences of or \ in the string is escaped with \ and \\ inside the pair of
double quotes. Otherwise, select no.
The default is no.
If set to yes, unit will include c=0.0.0.0 syntax in SDP when sending a SIP re-INVITE to
the peer to hold the call. If set to no, unit will not include the c=0.0.0.0 syntax in the SDP.
The unit will always include a=sendonly syntax in the SDP in either case.
The default is yes.
Specifies the lowest TCP port number that can be used for SIP sessions.
Specifies the highest TCP port number that can be used for SIP sessions.
Enables or disables the Computer Telephone Interface feature provided by some servers.
Description
RFC 3261 T1 value (RTT estimate), which can range from 0 to 64 seconds.
The default is.5.
RFC 3261 T2 value (maximum retransmit interval for non-INVITE requests and INVITE
responses), which can range from 0 to 64 seconds.
The default is 4.
RFC 3261 T4 value (maximum duration a message remains in the network), which can
range from 0 to 64 seconds.
The default is 5.
Chapter 6 SPA9000 Field Reference
Document Version 3.01