Bandwidth requirement estimation

It all depends on the volume of email. Your ISP can give you a history of Bandwidth usage. We are a 500 employee co. and we started out with that idea. However, you say that web surfing is not critical. If you allow people to surf through the T1, you may experience some poor performance. If your company only wants to budget one T1, then I would dedicate it to the email server only. You can then slowly add users (those who require the internet) to the internet scope. There are many programs thatcan monitor bandwidth (I use an SMS network monitor). Add users until you see what your limits are. There is no real equation for determining individual bandwidth. There are just too many varying factors: job type, work hours, web applications, etc.I hope this helps you out. We bought our first T1 2 years ago (from ISDN). We are now pulling in 9 T1s! So....I'll finish up here....The best thing you can do is to start small, monitor usage, and buy as you need.

heh... well. I had a small company with 20 people in network. It was enough 19200 modem for leased line :) Yes, we didn't use browsing very much. if we take 19200/20*500=480K line should be more than fine. You can use other method to calculate bandwidth (it used on ISPs) - take number of user, multiple on required bandwidth and divide on 3..5 - in your case we'll have 500*1K/3=166K. So my suggest to take 256K and monitor traffic to see - how is it used. how much takes eMail, how much browsing and add more if you need.

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