Subj : Pure DOS TelNet ZMoDem
To   : Stephen Hurd
From : Bo Simonsen
Date : Fri Oct 22 2004 12:23 am

Hello Stephen!

Saturday October 16 2004 20:58, you wrote to me:

 >>  SH> Because XModem and YModem both send a block, wait for
 >>  SH> confirmation, rinse and repeat... this means that (for XModem)
 >>  SH> every 128 bytes requires a round trip to be completed before
 >>  SH> the next 128 bytes are sent...
 >>
 >> Yes but it's doesn't make them more optimized for modems than for
 >> telnet.. : Or does it?

 SH> My round trip time to vert.synchro.net is currently 645.339 ms.
 SH> That is the time between EVERY 128 bytes in an XModem transfer... so
 SH> say I want to transfer a 5k file... 5*1024 = 5120 5120/128 = 40 40 *
 SH> .645339 = 25.8

 SH> This means that 25.8 seconds will pass while my vert is just sitting
 SH> there waiting for my system to acknoledge the previous 128 bytes... 5k
 SH> can be transferred by both systems in under 1 second.

Oh yes I see. Thanks for the explaination Stephen. :)

Bo
--- GoldED+/LNX 1.1.5
 * Origin: The Night Express - 45-36959335 - 1200 BPS only (2:236/100)

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