You can get a mechanical serial switch box. Plug the serial device into it and then connect the box to as many PCs as it has outputs. I use one of these to share my Dectalk Express amongst my machines. Also likely to need a few male-female serial converters depending on the kit. I replaced my old 2-way with a new 4-way about 6 months ago so they are still on sale. Regards, Garry -- Garry Turkington garry.turkington at kycor.org.uk