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Re: CSU/DSU's, async RS-232, and PPP. How?

daemon@ATHENA.MIT.EDU (Kevin D. McCormick)
Wed Jul 24 22:12:01 1996

Date: 	Tue, 23 Jul 1996 22:28:53 -0400 (EDT)
From: "Kevin D. McCormick" <fbyte@sub-zero.mit.edu>
To: "Michael H. Warfield" <mhw@wittsend.com>
cc: linux-net@vger.rutgers.edu
In-Reply-To: <m0uihtX-0000r6C@wittsend.com>

On Tue, 23 Jul 1996, Michael H. Warfield wrote:

> 	You're E-Mail address is at MIT so I'll "assume" that you are in
> the US and tailor my comments for a US audience...
> 
> 	Hmmm...  Are you out of reach of ISDN?  My BRI's are costing me
> only slightly more than the cost of two telephone lines (BellSouth, GA -
> your milage may vary), provide me with more than twice the capacity & features
> of two POTS (Plain Old Telephone) lines and give me 128K (actually 115K on
> ASYNC).  That better than twice what you are getting on those dedicated
> 56K lines and I can't see those lines as being cheap.  Last time I did anything
> with CSU/DSU DDS lines the price was outragious!

Believe me, we would prefer BY FAR to use ISDN.  You're very lucky you 
get BellSouth service.  Up here in New England, all business-class ISDN 
lines (and yes, we do need business, not residential) are charged on a 
per-minute basis.  Given that we would like to have 24-hour connectivity, 
and NYNEX wants $0.055 per minute, that would cost us $2,376 per month.  
We've had an offer from a NYNEX liaison company for 56k lines at $150 per 
month, so that's why we're considering it.  ISDN modems aren't much 
cheaper than CSU/DSU's, you don't get the multi-DLCI capability of Frame 
Relay, and you have to deal with the occasional broken connection, but 
we'd still prefer to use it if we could because it costs so much less 
(and is so much simpler) to set up.

-------------------------------------------------------------------------------
Kevin "Frostbyte" McCormick             kmccorm@mit.edu - root@sub-zero.mit.edu
Massachusetts Institute of Technology              You should be running Linux!
Q: How many Microsoft engineers does it take to screw in a light bulb?
A: None.  They just define darkness as an industry standard.




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