solworth@uicbert.eecs.uic.edu (02/14/89)
Having received a pair of telebit modems, I have been trying them out with kermit and tip. With kermit, between a pair of Sun 3/50s, I am unable to get an effective baud rate over 5000 transmitting pre-compressed files. Tip works faster, but when I try to transfer binary files it starts spewing garbage to the screen. Settings are as follows: Kermit: at &f s51=5 s52=1 s54=3 s110=0 s111=0 s53=3 s66=1 s55=3 s45=255 q6 &w Tip: at &f s51=5 s52=1 s54=3 s110=1 s58=3 s53=3 s66=1 s55=3 s45=0 q6 &w Jon Solworth
dik@uva.UUCP (Casper H.S. Dik) (02/15/89)
In article <64400002@uicbert.eecs.uic.edu> solworth@uicbert.eecs.uic.edu writes: > Having received a pair of telebit modems, I have been trying >them out with kermit and tip. With kermit, between a pair of Sun 3/50s, >I am unable to get an effective baud rate over 5000 transmitting >pre-compressed files. > Settings are as follows: > >Kermit: > at &f s51=5 s52=1 s54=3 s110=0 s111=0 s53=3 s66=1 s55=3 s45=255 q6 &w ^^^ Use a Kermit protocol support setting of s111. (e.g. s111=10) This will make create communications like Sun <- kermit protocol -> telebit <- PEP -> telebit <- kermit -> Sun With this setting (set s110=1 to use compression) I get an effective baudrate (using kermit) > 10000. (using a PC & a SUN) Note your two kermits are no longer talking the protocol to each other but are talking to the telebits instead. Many people seem to think that switching on the kermit protocol support requires a special version of kermit, or a special program. Or they think that the modem will start transmitting kermit packets. (Well I did anyway) >Tip: > at &f s51=5 s52=1 s54=3 s110=1 s58=3 s53=3 s66=1 s55=3 s45=0 q6 &w Tip doesn't support binary transmissions. When tip gets a take command it sends the command cat filename ; echo ^A. As soon as the receiving end of tip sees a ^A it stops sending the characters to the file, and starts sending them to your screen. Try sending over uuencoded files instead. >Jon Solworth Hope this helps, --cd ---------------------------------------------------------------------------- Casper H.S. Dik University of Amsterdam | dik@uva.uucp The Netherlands | ...!uunet!mcvax!uva!dik
wrl@wdl1.UUCP (Bill Lewandowski) (02/15/89)
Have you heard of the 'Blast' prottocol for Sun-Sun connections ? It seems to be a real good product and it has a great transfer rate. You can reach them at (504) 923-2155. Bill Lewandowski Ford Aerospace - Colorado Springs
mdb@laidbak.UUCP (Mark Brukhartz) (02/17/89)
>> I am unable to get an effective baud rate over 5000 transmitting >> pre-compressed files. >> Jon Solworth > With this setting (set s110=1 to use compression) I get an effective > baudrate (using kermit) > 10000. (using a PC & a SUN) > Casper H.S. Dik I believe that the Telebit's compression algorithm may expand pre-compressed data, rather than further compressing it. The Telebit compression option is better suited for uncompressed files. Mark Brukhartz Lachman Associates, Inc. ..!{amdahl, masscomp, nucsrl, sun}!laidbak!mdb