🚀 go-pugleaf

In article <11886@rochester.UUCP> lee@rochester.UUCP (Lee Moore) writes:
>I am considering running UUCP over Tymnet in async mode.  I know
>that I have to put the line into "transparent" mode (8-bits...) but
>is there anything else to know?  Has anybody else tried this?
>Does the jerkiness of in the arrival rate of characters over
>Tymnet make any difference?

You also have to turn off all control characters and make the timer
(timeout before sending incomplete packets) as short as possible
(I believe it's 50 Msec.).  Unfortunately, that still has things very
slow.  We tried it on 9600 loopback to our local switching office, and
the average effective transfer rate was about 1400 baud.  (64Ms to
load buffer, 50Ms to timeout and send the buffer, 50Ms for the other
end to timeout on the buffer acknowledge).  Yech.  If you can try using
an X.25 Pad and the 4.3 UUCP.  4.3 UUCP supports pads (protocol "f")
directly.  We are getting 5600 baud effective thru-put with it.
The major problems with 4.3 is twofold:
	1) Uses 7 bit mode, so binary files go up in size.
	2) Assumes "error free" transmission, and only ships a checksum
	   at the end of the file.  In our case, one of the ends cannot
	   guarantee reception of characters even at 2400 baud with
	   flow control, so we die a lot.  This shouldn't be a problem
	   with a better UNIX machine (our Pyramid is not the problem)
-- 
Chris Lewis,
UUCP: {allegra, linus, ihnp4}!utzoo!mnetor!clewis
BELL: (416)-475-8980 ext. 321