PE> 3. Ignore any bugs in the USR, they're all features.

BG> Like the DOCUMENTED difference re the port speed?
BG> Sometimes it pays to read the manual.

Dunno, this claim is pretty iffy really.

BG> A few relevant extracts from the Courier on-line manual...
BG> ==========================================================================
BG> Data Rates

BG> The modem can be set to a fixed or variable serial port rate.
BG> A fixed rate sets the modem for the highest possible throughput
BG> and provides the best performance.  A variable rate allows the modem
BG> to switch to match the more limited rate on the phone connection.

Nothing unusual about the USR here.

BG> &Bn     Serial port rate variable or fixed.

BG> &B0     Variable rates.  When the modem switches its connection rate
BG>         to connect with a modem operating at a different rate, it
BG>         also switches its serial port rate.  The software or terminal
BG>         also switches serial port rates to match the connection rate.

Ditto.

BG> &B1     Fixed rate.  Default.  The modem always communicates with the
BG>         terminal or computer at the rate at which you have set the terminal
BG>         or software, regardless of the connection rate. For the greatest
BG>         throughput, set the serial port to 115.2K, 57.6K, 38.4K bps for
BG>         high speed calls and to at least 9600 bps for 2400-bps calls.

BG>         This setting is not affected by the &N setting.  However, the
BG>         serial port rate must be equal to or higher than the &Nn rate.

Note that this is the DEFAULT and that there is NOT A MENTION of
&W at all. And when I dont believe that the AT standard actually
does specify that the &W speed should be used in that case, rather
than the speed of the last received AT command, it looks very much
like a USR quirk instead. And an undocumented one at that.

BG> &B2     Fixed for ARQ calls/Variable for non-ARQ calls. Answer mode only.

Note this ISNT the mode he is using. You could be forgiven for thinking
that USR intends the comment about &W to apply to ONLY this config.

BG> When the modem goes off hook and connects in ARQ mode, it shifts
BG> its serial port rate up to a user-specified rate, for example,
BG> 38.4K bps. If the connection is not under error control, the
BG> modem behaves as if it were set to &B0 and switches its serial
BG> port rate to match the connection rate of each call.

AND this is clearly talking about AFTER the connect, NOT the RING.
Which isnt surprising given that this particular mode does something
different depending no whether its an ARQ connect or not, port speed wise.

BG> To implement this feature, first set your software to the desired
BG> rate.  Then send the modem the AT &B2 [other settings] &W command.

Again, it appears to be saying unambiguously that
this only applys to &B2 and not the default &B1.

BG> The modem stores the rate of the command in NVRAM along
BG> with the settings.  Each time it makes an ARQ connection,
BG> the modem checks NVRAM for the specified serial port rate.

Ditto.

BG> When sending subsequent configurations to NVRAM, be
BG> sure your software is set to your selected serial
BG> port rate, so that the correct rate is maintained.

Ditto.

BG> ===========================================================================
BG> &Bn     Serial port rate variable or fixed.
BG>         &B0 Variable rates.
BG>         &B1 Fixed rate.  Default.  The modem always communicates
BG>             with the computer at the rate at which you have set the
BG>             terminal or software, regardless of the connection rate.

Which implys the standard AT command style that the speed of the
last AT command is used. If they aint gunna do it the standard way,
they have to point out that they aint doing it the standard way.

BG>             This setting is not affected by the &N setting.  However, the
BG>             serial port rate must be equal to or higher than the &Nn rate.

Note not a word about &W at all.

BG> &B2 Fixed for ARQ calls/Variable for non-ARQ calls.  Answer mode
only. When
BG>             the modem goes off hook and connects in ARQ mode, it shifts its
BG>             serial port rate up to a user-specified rate, for example, 38.4
BG>             bps. If the connection is not under error control, the modem
BG>             behaves as if it were set to &B0 and switches its serial port
BG>             rate to match the connection rate of each call.

Soorree, either dud as designed, or dud documentation or both.

Then there is the TINY matter that it makes no sense whatever
to do it the way it does anyway, whatever they document. FAR
too conterintuitive and no good reason to do it that way at all.

--- PQWK202