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A possible customer of ours want to upgrade the control system of their district heating plant from an old SattLine system and we have offered a solution based on ABB Freelance AC700F and ABB DigiVis. They want to control the plant from their central control room in another plant and there are two ways of connecting the two sites: a direct phone line (unused) and a public 2 Mbit/s SDSL internet connection.
Against our strongest recommendation, the customer tech rep is adamant that we use their spanking new 2 Mbit SDSL internet connection, telling us that we're out unless we come up with a solution based on the SDSL connection. He claims the IS/IT dept requires access to all traffic going in and out of their network, refusing to even listen to our arguments that IS/IT doesn't have anything to do with these systems or their internal communications. The problem is that AC700F uses some kind of IP Network Broadcast messages (or Multicast, even ABB can't tell which one), a protocol specifically designed not to route outside of it's own subnet. Our only idea is to use some kind of hardware VPN modem between the CPU and the router but so far, our supplier haven't been able to come up with a suitable product.
We have asked ABB to supply a better specifications of the protocol used but so far they haven't come up with anything useful, referring only to 800xA (which indeed can be routed).
Does anyone here know if you can route Freelance telegrams over a public internet connection at all?
Against our strongest recommendation, the customer tech rep is adamant that we use their spanking new 2 Mbit SDSL internet connection, telling us that we're out unless we come up with a solution based on the SDSL connection. He claims the IS/IT dept requires access to all traffic going in and out of their network, refusing to even listen to our arguments that IS/IT doesn't have anything to do with these systems or their internal communications. The problem is that AC700F uses some kind of IP Network Broadcast messages (or Multicast, even ABB can't tell which one), a protocol specifically designed not to route outside of it's own subnet. Our only idea is to use some kind of hardware VPN modem between the CPU and the router but so far, our supplier haven't been able to come up with a suitable product.
We have asked ABB to supply a better specifications of the protocol used but so far they haven't come up with anything useful, referring only to 800xA (which indeed can be routed).
Does anyone here know if you can route Freelance telegrams over a public internet connection at all?