You may have heard of RS232 communication way. It is used in 1 to 1 communication. What about in the situation when you want to communicate RS232 equipment with many (1 to N) devices? Yes, you definitely need to change RS232 communication way to RS422/RS485.
Even if you change the communication way, you still will face with defects of distance limitation, and its high initial installation/maintenance cost.
However, you can easily solve all those defects with Sollae Systems’ serial to Ethernet device server (ezTCP) that provides multi-monitoring function. ezTCP gives you to monitor serial data from a remote site over the Internet. Many hosts from remote site can access to the ezTCP that is connected with your serial device to monitor its data. So with ezTCP, there is no distance limitation and the data can be monitored with more than one PC.