By running the MDC Controller on a machine that is connected
to or exposed to either the Internet or your VPN (For security reasons a VPN is
HIGHLY RECOMMENDED) with a fixed IP address, each MDC workstation can connect to
and communicate with the controller via the TCP protocol. Since (like
cellular telephones) signals / IP connections can drop when an MDC unit moves
into a "dead-spot", the MDC software has error detection capabilities that
will sense disconnects and automatically attempt to reconnect when a sufficient
signal is again present.
The most typical format for these devices is as a PCMCIA card that plugs into
the PCMCIA slot on your laptop computer. Some allow for external antenna
to increase signal strength, which is highly recommended. However other more rugged truck mounted devices
that connect to your computer via a USB or serial port are also available.
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