Com Port Redirector
Com Port Redirector is a software utility for network-enabling legacy software applications
that do not have network support.
Com Port Redirector installs virtual Windows® communication ports. These virtual communication
ports are redirected over a network to the M-Bus port of a PiiGAB 810 Gateway. The communication
with the gateway is done in pretty much the same way as when ”pure” TCP/IP is used. The main
difference is that the software sees the gateway as a normal communication port.
Below is a short description, of the communication process.
• From a virtual com port, the data is stripped out of a serial packet and placed into an IP packet.
• The serial packet is sent from the virtual communication port to a network interface on the PC.
• Data is transmitted over the network, through switches or routers, to the network interface on a device server.
• From the network interface on the gateway, the data converts from an IP packet back to a serial packet.
• Once in a serial packet, data is transmitted to the M-Bus port or alternatively to the serial RJ12 contact.

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