We use USB to 7 serial port adapters in these cases. Stuff like this one, except some chinese no-name for 1/10 the price. There are also products that present physical serial ports over LAN, useful ...

This Ethernet-to-serial router is a device that ex-tends Ethernet connectivity options for the company's controllers and networks. The router intelligently detects and relays alarm events to a monitor ...

Well it certainly seems that there are a lot of you out there that watch the used router market for lab hardware pretty closely. Thanks for the continued insights into what makes sense, and what doesn ...