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Posting-Version: version B 2.10.1 6/24/83; site wu1.UUCP
Path: utzoo!watmath!clyde!floyd!cmcl2!rocky2!cubsvax!wu1!rf
From: rf@wu1.UUCP
Newsgroups: net.dcom,net.news.sa
Subject: Re: 2400 baud modems
Message-ID: <263@wu1.UUCP>
Date: Thu, 22-Mar-84 13:54:25 EST
Article-I.D.: wu1.263
Posted: Thu Mar 22 13:54:25 1984
Date-Received: Sun, 25-Mar-84 07:37:51 EST
References: <14@sask.UUCP>, <237@deepthot.UUCP>
Organization: Western Union Telegraph, Mahwah, NJ
Lines: 33

Julian Davies (watmath!deepthot!julian) writes:

  It isn't obvious that the x25 networks save a lot of money;
  depends on mean packet size obtained and the carrier charge
  schedules.

For large volumes of traffic, public data networks can be much
cheaper than voice grade lines.  They are usually far more
reliable than long-distance voice circuits, as well.

Public data transport services can offer much better prices than
most private networks, since 9600 bit per second trunk lines
make roughly four times better utilization of voice grade
telecommunications lines (known in the industry as "vee-effs"
for Voice Facilities) than a private user using 1200 b/s lines.

The public networks are just now starting to offer protocols for
computer (as opposed to terminal) use.  Tymnet will probably be
the first; their X.PC protocol is slated for release in August.
It should be possible to implement X.PC on any computer that can
run uucp.  If you'd like to learn more about X.PC, write:

  X.PC Development Group
  Network Technology Division
  Tymshare, Inc.
  10261 Bubb Road.
  Cupertino, CA 95014

If only I could persuade Western Union to offer X.PC.  *sigh*

				Randolph Fritz
				Western Union Telegraph
				{philabs, allegra!sunrise}!wu1!rf