Linksys SPA9x2 Phone Administration Guide 48
SIP Timer Values
Setting SIP Parameters
SIP Timer Values
SIP timer values control transmittal, time-out, delay intervals and so on for SPA9x2 data. Each
value is displayed in seconds.
SIP Timer Notes
Register Retry Enhancements: this feature adds flexibility to the delay timers that are activated
when the SIP REGISTER of a device fails. Timers are selected based on the failure response code
sent by the SIP proxy. Depending on the type of registration failure, either a short timer or a
long timer is activated.
All SIP timer parameters are included in the following table.
Caller ID Header Select where the SPA9x2 gets its caller ID from:
PAID -RPID-FR OM
P-ASSERTED-IDENTITY
REMOTE-PARTY-ID
FROM header
Defaults to PAID-RPID-FROM
Parameter
Description
SIP T1 RFC 3261 T1 value (RTT estimate). Ranges from 0 to 64 seconds.
Defaults to .5 seconds.
SIP T2 RFC 3261 T2 value, which is the maximum retransmit interval for non-
INVITE requests and INVITE responses. Ranges from 0 to 64 seconds.
Defaults to 4 seconds.
Parameter Description
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