lee@rochester.UUCP (Lee Moore) (09/27/85)
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?
thanks!
--
TCP/IP: lee@rochester.arpa
UUCP: {seismo, allegra, decvax, cmcl2, topaz, harvard}!rochester!lee
XNS: Lee Moore:CS:Univ Rochester
Phone: +1 (716) 275-7747, -5671
Physical: 43 01' 40'' N, 77 37' 49'' W
-- 11 months 'till I drop off the face of the earth.clewis@mnetor.UUCP (Chris Lewis) (09/29/85)
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
jordan@ucbvax.ARPA (Jordan Hayes) (10/01/85)
Yeah, I want to do this with telenet and I can't find any bloody docs for it ... anyone doing this? ------------ Jordan Hayes jordan@UCB-VAX.BERKELEY.EDU UC Berkeley ucbvax!jordan +1 (415) 835-8767 37' 52.29" N 122' 15.41" W