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▣ Advanced
♦ Local SIP port : Normally UDP 5060 port is used for SIP standard. If this SIP port is different from a normal port,
you should put the SIP port number in accordance to applied server or service.
♦ Register expiration : SIP protocol is designated to re-register the saved user information regularly.
User can set this re-register interval. Once, this time is saved in the server, the server re-registers the information
according to the set interval.
♦ Register retry interval on failure : If the register server does not have any user information, on the phone 'Register
failed' will be displayed so that user can not make a call.
And then, MWP1100A re-register the user information in accordance to the saved interval time.
♦ Ping interval : In order to continue the session with server, client keeps sending invite packet to server regularly
(Normally, it is not used).
♦ SIP T1 timer/SIP T2 timer/SIP max transaction timer : SIP Timer T2 configures the maximum retransmit interval
period when a client transaction uses an unreliable transport, such as UDP. For unreliable transports, requests are
retransmitted at an interval which starts at T1 and doubles until it hits T2.
Ex) T1 = 0.5s, T2 = 4s, Max Timer = 32s
Retry Interval for registration fails - 0.5s, 1s, 2s, 4s, 4s, 4s, 4s, 4s, 4s, 4s = 32s
♦ Power saving call mode : Set or unset power saving.
♦ PRACK: It means provisional response acknowledgement. The PRACK request plays for provisional responses.
PRACK is a normal SIP message. As such, its own reliability is ensured hop-by-hop through each stateful proxy. If
this was not the case, the PRACK message could not traverse proxy servers compliant to RFC 2543.
♦ DNS cache: It saves the DNS information to prevent requesting the DNS information to DNS server every time for
use of DNS information.
♦ SIP Session Timer : The SIP provides the Session Timer feature which terminates the call to prevent an abnormal
state of call connection. The call states are checked at a regular interval. MAX, MIN, FORCE, etc. vary depending on
the operation environment and in some cases are not used, so they need to be configured according to the operation
environment of the service provider.
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Admin Manual
Liberty L2 (WP300S)
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