Re: Serial Communications

[rfka01 <rfka01@gmx.de>]

In article <1130722451.883903.48870
@g14g2000cwa.googlegroups.com>, tolsen64@hotmail.com 
says...
> Does the GS just dump characters if the incoming text is too fast?  Or
> can that even happen?
> 
> Here's what I have:
> 
> GS -> Ethernet Modem -> Internet.
> 
> When I telnet out to a server (NNTP or SMTP), I lose half the
> characters in the response, so what i'm getting back is useless.
> 
> Both the GS and the Ethernet Modem's serial speed is set to 19200.
> 
> I thought it might be handshaking so I spent the day studying every "GS
> Handshaking" article I could fine (there are a lot of different
> versions of the beast).  All of them go from the MINI DIN-8 to DB-25.
> My Ethernet Modem has a DB-9 connector so I tried to "adapt" by
> cross-referencing the DB-25 signal names to the same on the DB-9.  But
> I couldn't get it to work (I couldn't transfer data at all) whichever
> cable i built.
> 
> The cable I have working now works great as long as i'm not receiving
> more than a few characters at a shot.  The BBS currently runs using
> this cable.  I got this cable working by trial and error and I'd have
> to ohm it out to tell you what it's pin-to-pin connections actually
> are.  But it evidently doesn't handshake.
> 
> The other cable I have is one that I used when I had the GS hooked up
> through the PC to the internet.  It always worked fine.  I got
> everything that was coming in (I had internet email working on my bbs).
>  But that cable doesn't work with the Ethernet Modem.
> 
> I'm wondering if the Ethernet Modem is just too-darn-fast for the GS.
> I've tried turning on the Buffering & FIFO options in the Ethernet
> Modem to no avail.  If I turn on the DTR Handshaking in the Ethernet
> Modem, I get no communications at all.  It only works if I set it to No
> Handshaking or Xon/Xoff.  But I still have the problem of losing data
> when a bunch comes in.
> 
> It seems as if I have hit a brick wall here...
> 
> 
What make is the ethernet modem you're using? Sounds 
like an ideal solution for connecting old PCs to the 
internet.

Thanks, Robert
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