PLANET VIP-255PT - Manual (Page 21)

Figure 15. SIP advanced setting page
Field Description
UDP Keep-alive Message To deliver the packets on a regular time schedule to keep
NAT port could open continued.
UDP Keep-alive Interval
To setup the schedule time for delivering the packets
Login Expire
This parameter allows user to specify the time frequency
that unit refreshes its registration with the specified
registrar.
Local SIP Port To defines the SIP port number, please follow your ISP
Local RTP Port To defines the RTP port number, please follow your ISP
RPort The parameter allows SIP phone to tell the proxy to only
send responses back to a particular address and port.
STUN Server
SIP Extension to notify SIP server that the unit is behind
the NAT/Firewall.
SIP Session Timer T1/T2 Allow you to trun on a timer to check if a SIP session is
still active or should be terminated.
Voice/SIP QoS: Enable the QoS feature configure the QoS ID values
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