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Dual-home / multiplex 2 different ISPs' DSL lines

Anyone ever multiplexed/dual-homed 2 different DSL lines (from 2 different ISPs) into one pipe?  With so much of our stuff going fully web, it's important that we don't have downtime.  Any advice?  I'm looking at fatpipe so far.  http://www.fatpipeinc.com/superstream/index.html
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
I wouldn't dual-home for this, I'd use a dual-WAN router instead.

That fatpipe thing is a bit misleading. It's not bonding at all, it's merely load-balancing. Yes, it will provide redundancy, but you won't get an overall speed increase over that of the fastest link.
" it's important that we don't have downtime"

How important?  Important enough to purchase professional gear like dual cisco routers and leased lines from the phone company with guranteed Service Level Agreements?
A Cisco/Linksys RV082 will allow you to have dual WAN at a decent price.  Just need to keep in mind the difference between load balancing and failover.  Load balancing will get you a little more bandwidth but if one DLS link fails you will have a severe performance hit.  (the RV does round robbin on outbound)  WIth failover, you will get original speed, but redundant availability.  

Also keep in mind that if you are hosting web or mail, your DNS needs to have records for your alternate path.
not a bad price for that dual wan.. I agree with them, thats the way to go..
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