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2 messages
2 total messages Started by Bill Keenan Sat, 31 Oct 1992 22:11
CSU/DSU w/ RS-232 port connected to system
#8
Author: Bill Keenan
Date: Sat, 31 Oct 1992 22:11
20 lines
1387 bytes
A company I work for is getting an Internet connection. We would like
to have a 56K leased line to the service provider (cost $142.10 + $275
per month). The service provider charges a large setup fee for this
type of connection because the install a router (Livingston) with the
CSU/DSU.

Does anyone know if I can connect a 56K CSU/DSU with an RS-232
connection to a serial port, which can sustain 56K, on my mail/news
system instead of using a router?

________________________________________________________________________
Bill Keenan
Internet:	wjk@phonogenic.com -or- phngnc!wjk
AppleLink:	wjk@phonogenic.com@INTERNET#
CompuServe:	>INTERNET:wjk@phonogenic.com
Phonogenic Systems Corporation - Phone 415/365-1083 - FAX 415/365-1083
PO Box 3535, Redwood City CA 94064

This country borrows about $4.25 per day per US resident (that is $17/day
for a family of 4) with little hope of paying any of the principal!
Re: CSU/DSU w/ RS-232 port connected to system
#10
Author: Bob Sutterfield
Date: Tue, 03 Nov 1992 19:11
17 lines
1443 bytes
In article <0105015D.hgkk5a@phngnc.Phonogenic.COM> wjk@Phonogenic.COM (Bill Keenan) writes:
   Does anyone know if I can connect a 56K CSU/DSU with an RS-232
   connection to a serial port, which can sustain 56K, on my mail/news
   system instead of using a router?

Most 56K CSU/DSUs are synchronous beasties, and your mail/news
system's serial ports are probably asynchronous beasties.  The two
won't talk.

Some CSU/DSUs can talk to an async serial port and convert the data
stream into sync before putting the bits on the wire.  This would be
the sort you'd probably need with your current setup.

Alternatively, you could run synchronous PPP on your mail/news system,
which would turn it into a sync-PPP router that would talk to most 56K
CSU/DSUs.  You'd need (a) synchronous PPP software and (b) appropriate
synchronous hardware.
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