Later, a LAN connection is installed at the remote site. The same SNMP RTU installed in Step One can be immediately transferred to LAN transport with minimal configuration - and without disconnecting alarm inputs. (Figure 2).
A dial-up connection can be retained as a backup secondary connection in case of LAN failure.
You can also take advantage of modern wireless technologies to supply an IP connection to your site. Cellular modems and even satellite connections have dropped in price dramatically, making them a viable option where wired LAN isn't workable. Cellular has an obvious advantage whenever possible, as its hardware and bandwidth prices are much lower.
You don't have to cut over all your sites at once - you can gradually migrate different sectors of your network to LAN, as your budget and installation manpower allows.
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