Sip Timer Values (Sec) - Cisco Small Business SPA509G Administration Manual

Cisco SPA IP Phone Field Reference
SIP Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Parameter
SRTP Method
Hold Target Before REFER
Keep Referee When REFER
Failed

SIP Timer Values (sec)

Parameter
SIP T1
SIP T2
SIP T4
Description
Selects the method to use for SRTP. Two choices are
available:
• x-sipura—legacy SRPT method
• s-descriptor—new method compliant with RFC-
3711 and RFC-4568
The default value is "x-sipura."
NOTE Not applicable to WIP310.
Controls whether to hold call leg with transfer target
before sending REFER to the transferee when initiating
a fully-attended call transfer (where the transfer target
has answered). Default value is "no," where the call leg
is not held.
NOTE Not applicable to WIP310.
Set this parameters to yes to configure the phone to
immediately handle NOTIFY sipfrag messages.
You can also configure this parameter in the
configuration file:
<Keep_Referee_When_REFER_Failed ua="na">Yes
</Keep_Referee_When_REFER_Failed>
Description
RFC 3261 T1 value (RTT estimate), which can range
from 0 to 64 seconds. Defaults to .5 seconds.
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.
RFC 3261 T4 value (maximum duration a message
remains in the network), which can range from 0 to 64
seconds. Defaults to 5 seconds.
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