Because of potential problems with the data transfer switches I would suggest a KVM switch. Allows keyboard, video, and mouse to be shared. I use multiple 4 port boxes and have several customers with 2 port boxes.
The data transfer boxes eventually get failing contacts and you get garbage screens.
Two that I remember are Cybex and Raritan, I buy Cybex out of Global Computer supply but this isn't an endorsement. Ed Fair
unixstuff@juno.com
Any advice I give is my best judgement based on my interpretation of the facts you supply. Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.