Dave, at 14:25 on Mar 15 1996, you wrote to Tony Molina...

TM> does this mean that V.34 14400 bps is different to V.32bis 14400 bps?

DH> Yes.  Theoretically, there should be a significant margin of improvment.

This is one instance where the theory tends to mirror reality, too.

DH> In practice?  Try it and see.

No problems, I'll save you the effort (and the ISD phone bill)...  :)

Here are the logged results of a floating V.34 call to USR's board in
Skokie, Illinois, and as you can clearly see, conditions don't get a whole
lot worse than this.  Having said that, I was still able to maintain this
particular connect until it reached its logical conclusion, several minutes
later. 

A subsequent call however, with both V.34 and V.FC disabled, attempted to
negotiate itself into oblivion.  No matter what I did, even forcing a lower
V.32bis link rate, it would NOT connect.  Not under any circumstances.

----------------
aty11
Freq     Level
 150     39
 300     29
 450     27
 600     27
 750     27
 900     28
1050     28
1200     29
1350     29
1500     30
1650     31
1800     32
1950     34
2100     34
2250     36
2400     37
2550     39
2700     40
2850     41
3000     44
3150     93
3300     93
3450     93
3600     93
3750     93

OK
USRobotics Sportster 33600 V.34+ Fax Link Diagnostics...

Modulation               V.34
Carrier Freq (Hz)        1680/1680
Symbol Rate              2800/2800
Trellis Code             64S-4D/64S-4D
Nonlinear Encoding       ON/ON
Precoding                OFF/OFF
Shaping                  OFF/OFF
Preemphasis (-dB)        10/10
Recv/Xmit Level (-dB)    36/11
Roundtrip Delay (msec)   263
Data Compression         V42BIS 2048/32
Equalization             Long
Fallback                 Enabled
Protocol                 LAPM SREJ 244/15
Speed                    16800/14400
Last Call                00:06:17
Disconnect Reason        DTR dropped
------------------------------------------

These stats are a pretty graphic example of the inherent value of fancy
protocols like V.34 (provided, of course, that they actually work).  :)

--- Msgedsq/2 3.20