Yealink CP860 SERIES, Configuring Manual

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YealinkCP860 Phones Configuring Guide
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6.
Enter the desired values in the
SIP Server Address
field. Contact your system
administrator for more information.
You can repeat steps 2 to 7 to register more accounts.
7.
Click
Save changes
to accept the change.
8.
Perform auto provisioning on the phone to download above configurations. For more
information on how to perform auto provisioning, refer to
Downloading Configuration
Files on page 11 .
SIP Session Timer
SIP session timers T1, T2 and T4 are SIP transaction layer timers defined in RFC 3261. These
session timers are configurable on IP phones.
Timer T1
Timer T1 is an estimate of the Round Trip Time (RTT) of transactions between a SIP client and
SIP server.
Timer T2
Timer T2 represents the maximum retransmitting time of any SIP request message. The
re-transmitting and doubling of T1 will continue until the retransmitting time reaches the T2
value.