BBS:      TELESC.NET.BR
Assunto:  Re: New offline QWK mail
De:       Digital Man
Data:     Wed, 8 Apr 2026 10:08:58 -0700
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  hbRenb: hcRe: New offline QWK mail
  bBynb: hcBoraxman bto cDigital Man bon cWed Apr 08 2026 11:46 pmn

 >   HBReNB: HCRe: New offline QWK mail
 >   BByNB: HCDigital Man Bto CBoraxman Bon CTue Apr 07 2026 02:09 pm
N >
 >  >   Re: Re: New offline QWK mail
 >  >   By: Boraxman to Rixter on Tue Apr 07 2026 10:42 pm
 >
 >  >  > Yes, but zmodem is a bit flaky over TCP sometimes.
 >
 >  > It certainly shouldn't be and if/when it is, I'd blame the
 >  > implementation, n the protocol.

 > I've found it that way, more specifically, when using syncterm.  Not sure of
 > it is the syncterm implementation, but I think lrszrz has also had issues at
 > times.  It seems some BBS's causes issues, some dont.
 >
 > zmodem wasn't designed for TCP, it was designed for a raw serial connection

ZMODEM was designed for pretty much any streaming transmission medium, not explicitly "Raw serial connection". There's definitely nothing about TCP that gives ZMODEM any particular heartache. The issues, when I have seen them, have been more about asymmetry in buffer sizes and bandwidths between sender and receiver, but that can be addressed with the different modes (e.g. streaming versus not) that ZMODEM supports. ZMODEM can be run in a per-packet ACK mode similar to X/YMODEM if that's needed, but that's not usually the case (yes, even over TCP).
-- 
                                            HYdigital man n(rob)

Rush quote #56:
His world is under anesthetic, subdivided and synthetic .. Digital Man
Norco, CA WX: 66.2F, 72.0% humidity, 6 mph WSW wind, 0.00 inches rain/24hrs
n---
  mSynchronetn  hgVertrauen n hHome of Synchronet n gh[vert/cvs/bbs].synchro.net

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