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Sorry for the late reply, I lost the url to the site.

Digressing from the OP's original question; where's the congestion occurring? OR, how do you know that there is congestion?

I think it's congestion because the cameras (analog) fall out of real time sync. There's one DVR plugged into the same switch as the computer that's running the surveillance software, the other two DVR's have to come through a single cable to reach the switch the surveillance computer is plugged into. I definitely don't think it's bandwidth. My theory is that the constant steam of packets (not sure if tcp or udp) from the 2 DVR's through one cable is causing it. They are a bit old. 1080p

Thanks for all the replies.

So at the old motel I work at, we have a 8 port switch in the office, fully utilized, then another 8 port switch thats located 150ft away, connected via cat6 cable, then a cat6 cable to a Cisco switch -> Arris router. There is a lot of congestion with the 3 CCTV DVR's constantly broadcasting. If I replaced both 8port switches with a 16 port with 1Gbps SFP, and connected them via fiber instead of cat6, would that make a difference?

Thanks