We used to do this. Since we had so many to manage we actually got an IP based serial port multiplexer. https://www.digi.com/products/networking/infrastructur

We used to do this. Since we had so many to manage we actually got an IP based serial port multiplexer. https://www.digi.com/products/networking/infrastructure-management/serial-connectivity/terminal-servers/digi-connect-ez-16-32 https://www.digi.com/products/networking/infrastructure-mana... The downside is you now had to ask of any Cat5 cable "is this serial or is this ethernet?"