Hello all!
Thank you for the responces about the problem. I will try your
suggestions this weekend and send a summary on results.
SoloCDM <[EMAIL PROTECTED]> wrote on Thu, 9 Dec 1999:
> When you disable a com port and install an internal modem to that
> port, the
> internal modem usually/sometimes handles the speed of the port,
> because you're
> not going directly through the serial port controller. On the other
> hand, when
> you go through the serial port controller, then your speed is reduced
> to that controller.
Of course the ports are 16550A (is it even possible to find a
motherboard with slower ports nowadays?). And I do not disable a
serial port when I insert an internal modem, the mb's second port
shows up as ttyS2 (quite usable too, I use it sometimes to talk to the
external modem when the internal is plugged in). Actually,
BIOS setup menu has advanced ("non-standard") options for the second
port on the motherboard (have to reboot to see which exactly) - could
someone point me to a document about these? I found nothing on the
faqservers I know.
"Rob Cartier" <[EMAIL PROTECTED]> wrote on Thu, 9 Dec 1999:
> After figuring out if you have the right UART and have set the serial
> line speed to at least 115200 use ATZ4 in the init string and see what
> happens. I believe that this is the init for hardware handshake and
> V90.
According to the USRV90 manual (thanks to Dave Reed for pointing to
the location), Z4 is the same as &F1, the default factory settings
which I used anyway. It also enables modem's autorespond (and I hate
to hear the modem's voice in my phone conversations :)
"Dan Browning" <[EMAIL PROTECTED]> wrote on Thu, 9 Dec 1999:
> I'm no expert, but what CONNECT speed are you getting on average? You
> can use a terminal program like $ minicom and do the ATDT555-1212 command
> manually to find out. Maybe your 56k is connecting at 1200 baud, but
> your 288 connects 28800 just fine?
Thank you, but the number does not look valid for Mexico D.F. :)
When I connect with the 28.8 modem, I get a string 115200 after
CONNECT, and everything is fine. With the 56K modem I get a string
26400/ARQ/V34/LAPM/V42BIS
(the first number varies, may be 24000, for example). I guess this
contains useful information, but do not know how to decode it (except
V34 and V42BIS).
So I need to find a big nice serial FAQ somewhere...
Thanks again, and my best regards,
Oleg
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