
Operation and Configuration Guide 3.14
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voltage reaches 11.9V. This ensures that the oMG does not continually
shutdown and restart when voltage is fluctuating around the low voltage
value.
•
High Temperature
: the upper temperature limit (internal oMG temperature),
above which the oMG will not operate.
•
Low Temperature
: the lower temperature limit (internal oMG temperature),
below which the oMG will not operate.
•
Uptime Extension After Ignition Off
: the amount of time, in hours, that the
oMG stays on and remains communicating after turning off the vehicle
ignition.
Note: Care must be taken when specifying a value. If too much time is specified, then the
vehicle's battery may be drained.
•
Heat Margin
: the threshold above the Low Temperature at which the
integrated electric heating circuit turns on to prevent the board from becoming
too cold (e.g. if Low Temperature is set to -20 and Heat Margin is set to 10,
the heaters will turn on when the temperature drops to -10). The heaters will
remain on until power is removed, or the oMG warms up to the value
specified for Low Temperature.
•
High CPU Temperature
: the upper temperature limit of the oMG's CPU,
above which the oMG will not operate.
•
Button reset time
: the amount of time, in seconds, required to hold the
external (black) RESET button to trigger a factory reset.
A.12.3 Tools
•
ping
: sends an ICMP ping to network hosts. Can be used to determine if a
particular host is reachable by the oMG.
•
dhcp-leases
: displays the current DHCP leases assigned by the LAN
Segment DHCP server.
•
tracert
: UNIX traceroute utility. Displays a list of all gateways between the
oMG and the specified host.
•
route
: displays the oMG’s current routing table.
•
arp
: shows the oMG’s cached mappings between IP addresses and MAC
addresses.
•
netstat
: displays network connections, routing tables, interface statistics,
masquerade connections and multicast memberships.
•
ifconfig
: shows the configuration for each network interface.
•
iwconfig
: shows the configuration of each wireless interface.
•
Iwlist
: shows additional information from a wireless network interface that is
not displayed by iwconfig. The main argument is used to select a category of
information while iwlist displays all detailed information related to this
category, including information already shown by iwconfig.
•
ipsec-vpn-status
: displays the output from the IPSec status command which
shows statistics regarding your current IPSec VPN connection.
•
clean-local-software-update-cache
: clears the local cache.