Date: Sat, 16 Nov 1996 11:56:08 -0500 From: dennis@etinc.com (dennis) To: Joe Greco <jgreco@brasil.moneng.mei.com> Cc: isp@freebsd.org Subject: Re: changed to: Frac T3? Message-ID: <199611161656.LAA13898@etinc.com>
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>> >Hi Dennis, >> > >> >I guess it depends on whether or not it is sold as an option (by the >> >networking service provider)... I usually see people talk about frac-T1, >> >T1, and then immediately jump to T3. >> > >> >Translation: I see less of a market for frac-T3 than I do for T3. >> >> This totally confused me, and I cant belive its true. The cost differential >> between T1 and T3 is what, 12x or more.....it seems unlikely that anyone >> could take that much of a hit......Our upstream provider is on a 4Mbs HSSI and >> plans on moving up as needed. > >I don't see that happening here, at least locally. > >What I usually see is people going for T3, the circuit costs are not so >terribly different, and then the upstream provider meters bandwidth or >performs rate limiting of some sort. It is my understanding that the "rate-limiting" was flipping switches on the T3 CSU/DSU,which is fractional T3 (ie, adjusting the clock rate). That IS what I'm talking about! >> Our current product runs well over 10Mbs...but I dont think that many people >> realize the HSSI is just a faster version of V.35...you can run V.35 fractional >> T3 util you get over the 10Mbs physical limitations......ie, you can connect >> a V.35 product on one end of a T3 and HSSI on the other...its just like >> RS-232 and V.35 for lower speed stuff....they are not end-to-end requirements. > >Sure. But your ISA based product is going to get a little slow handling >such high speeds, I would think? Maybe not. I would rather see a PCI >based solution, but that is just personal preference. Im not talking about ISA...... Dennis
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