Paul, at 17:33 on Jan 30 1996, you wrote to Bill Grimsley...

PE> 57600 will not give me anything that 38400 won't. 

BG> Of course it will - it'll allow you to transfer compressed data at full 
BG> speed with 33600 connects (I've already logged speeds in excess of 4000 cps 
BG> here).

PE> 119%?  I'd like to see that. 

I really don't care whether you believe me or not.  The 4000+ cps transfer
of a 1.35Mb file was witnessed by an independant party anyway, so who cares
what you believe.  You'd need pretty damn good lines to acheive that speed
too.

PE> I didn't say it was impossible, the bit stripping is a theoretical
PE> 25%.  I said I'd like to see it, seeing as I haven't seen anything
PE> above 115% here yet.  Maybe I should list that as another USR bug.

Maybe you should connect manually with a few different V.34+ USRs, then
drop into command mode with +++, and issue ATY11 a few times.  The
resulting list of frequencies vs. line levels will tell you instantly why
your modems connected at less than 33600 (assuming that they do).  

Then post them here, so we can all see that your lines are probably
incapable of supporting the Courier's maximum speed.  Then blame Telstra,
not USR.

PE> Did you do your stats on a large (500k) file to get proper stats?

BG> Yep, 95SJONG2.ZIP from David, 1.35Mb in size.  Big enough for you?

PE> Yes, that's fine.  Since I can't see it first-hand because I have
PE> a crappy modem, I have to make sure that we're looking at the
PE> same things.

I'm saying no more on the subject until I've seen some ATY11 dumps.

BG> I've already told you that with your port locked at 38400, the fastest it 
BG> will allow data through is at 3840cps (in reality, it's a tad less than 
BG> that), so with a 33k6 connect, you immediately lose ~200 cps from your top 
BG> speed.  IOW, you'll NEVER see 4000 cps unless your port is locked at 57600 
BG> or higher.  Is that clear enough for you yet?

PE> Yes, which is a reason to up my com port speed.  I had always 
PE> intended to do that, in fact I would like to up it to 115200 in
PE> case I end up transferring uncompressed files, it's just that I
PE> was doing it one step at a time. 

Whilst 57600 will present no problems, 115200 might, although it's
impossible to say until you try it.  However, with a buffered UART and a
decently set up operating system, I'd expect no hassles myself.

PE> I had to quickly upgrade to 57600 only because of a bug in the USR, ie 
PE> failure to auto-detect baud rate.

Oh yeah, the DOCUMENTED feature we all told you about?  In fact, after
studying the behaviour of the &Bn command, I can see now why USR
specifically do it that way.  It's actually a rather interesting and useful
feature.

Regards, Bill

--- Msgedsq/2 3.20