Yes the built in power supplies are the way to go. No I seem to remember the backplane affects all data through the switch not just when you link it to another switch. so from google; the backplane bandwidth
This is the total rate of packet or bit throughput that the switch can handle through all ports at once. If you have an 8 port 100Mbps switch, you need a backplane bandwidth of 400Mbps to allow all 4 pairs of ports to talk at the same time sounds about right. And you can dumb down certain ports to allow things like echo cardiograph machines to connect at 10mbps, most of them are kinda old and refuse to negiotiate with gigabit switches. - If you don't see the need for managed switches in surgeries, you ain't looking after big enough surgeries Pete :) Andrew.C _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Machell Sent: Monday, 5 March 2007 8:13 PM To: General Practice Computing Group Talk Subject: Re: [GPCG_TALK] Which switch? On 05/03/2007, at 7:28 PM, Andrew wrote: Sorry I was wrong about the price of the Dell managed 24port gigabit switches, They are more like $1500 each. The potential throughput is the key though, all to do with the speed of the backplane. That's why some switches are more expensive than the d-link/netgear types. There was a good review site for switches somewhere... but a quick search on the Steve Cassidy (real world) articles at www.pcpro.co.uk will turn up some interesting real world examples of good and bad switches. You only get what you pay for. I guess smaller surgeries don't need the huge speed across the backplane. However when ou start using nearly all the 24 ports you will notice a difference. Andrew, backplane speed is only an issue if you are using it - that is, linking to another, usually identical switch. Managed switches are, well they're managed - they have an IP and a web and/or CLI interface. You can do things like create VLANs, you can see stats on throughput and manage, to a certain degree, each port. I don't see much need for a managed switch in a surgery situation, but agree that a better quality switch will give better performance. As I don't buy Dell I have no opinion on them. I like both Netgear (but only the metal ones with a built-in PSU ie. the dearer ones) and Linksys, and dislike D-Link and Netcomm - too many failures seen in these. regards, Peter.
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