Proroute GEM420 4G M2M Router
GEM420 User Manual 37
1. Time Schedule: This option allows you to limit WAN connection available in a
certain time period. There is only “(0) Always” option available by default. You
can add a new time schedule at System -> Scheduling menu.
2. MTU: MTU refers to Maximum Transmit Unit. Different WAN types of connection
will have different value. You can leave it with 0 (Auto) if you are not sure about
this setting.
3. NAT: By default, it is enabled. If you disable this option, there will be no NAT
mechanism between LAN side and WAN side.
4. Network Monitoring: You can do preferred settings by using this feature to
monitor the connection status of WAN interface. Checking mechanism depends
on several parameters defined here. The network monitoring provides the WAN
interface status and then system can prevent embedded 3G/LTE modem from
some sort of auto-timeout and disconnects from the Internet after a period of
inactivity. This keep alive feature is also known as Ping Reboot.
Enable: Check the box to do Network Monitoring.
DNS Query/ICMP Checking: Do the keep alive through DNS query packets or
ICMP packets.
Loading Checking: The response time of replied keep-alive packets may
increase when WAN bandwidth is fully occupied. To avoid keep-alive feature
work abnormally, enable this option will stop sending keep-alive packets when
there are continuous incoming and outgoing data packets passing through WAN
connection.
Check Interval: Indicate how often to send keep-alive packet.
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