Modems no more
If you have a device or PC connected to PSTN line with the Analog Modem and you want to save cost. Now you can do this. We can replace the modem with a TCP/IP connection. Any protocl you are using no problem . You send a e-mail alert, connect two PCs with dial-up . You are using a modbus RTU protocol or n2bus and you need to use a TCP/IP protocol for comunication without change the PLC/DDC/PC, we have the solution.
One project that we realized was to connect a FX16 by Johnson Controls on internet. The FX now can send e-mail alert without cost and the mainteiner is now able to connect with a pc in order to modify the parameters.