-=> Quoting Rod Speed to Dieter Mirbach <=-

Rod,
 
 DM> It may have something to do with 2400 connects, as that is all
 DM> Paragon has at this stage.
 
 RS> OTOH it is a classic situation where flow control must be absolutely
 RS> right, the phone line rate is such a long way from the rate between
 RS> the PC and the modem that a blemish will show up very dramatically.
 RS> Whereas for example inadequate flow control, but with the modem/PC
 RS> speed not locked, but following the phone line speed, wont generally
 RS> make a flow control problem visible on an upload.
 
If it were a flow control problem, surely it would show on any 
transfer protocol, not just Zmodem.

Anyhow, I uploaded a rep packet to Paragon, and the damned thing 
worked on Zmodem. 

At first thought, it could have been by modem init string, but 
then it comes around again, why is only Zmodem that plays up ? 
The othe two transfers protocols that I have tried, Sealink & 
Kermit, both worked fine, every time.

 DM> The Zmodem upload worked once or twice in both versions, and then
 DM> carked it. It starts uploading, and then fails after the 1st 1k block.
 
 RS> Very odd, particularly as you see it on other than Pauls. Paragon
 RS> isnt using Spirits is it ? I've forgotten what you are using yourself.
 
 DM> No, the upload to TML was fine using Zmodem. I'm not sure what sort
 DM> of modem(s) Paragon is using, but I am beginning to shy away from
 DM> them because of the lost messages. Now it looks like I may call back
 DM> in to check for lost messages !
 
 DM> I have a Maestro SE.

 RS> Its possible its just finger trouble. Flow control is rather messy
 RS> since it needs to be right in the comms software and the modem and
 RS> there are quite a few variations on the hardware flow control in the
 RS> physical modem. Then there are cable and serial port possibilitys. The
 RS> combinations can bite you at times.
 
Another furphy thrown into the equation is that I use the same 
version of telemate on 2 PC's, one at home & one at work; 2 
different modems - a Maestro SE, & a Netcomm M4.

It looks as if I will have to get serious with this & devote some 
time to sorting it out.

Dieter



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