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.
----- Original Message -----
From: "SoloCDM" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: "Jeff Hogg" <[EMAIL PROTECTED]>; "Edward Schernau" <[EMAIL PROTECTED]>;
"Oleg Okunev" <[EMAIL PROTECTED]>
Sent: Thursday, December 09, 1999 1:47 PM
Subject: Re: USR 56K external
> Jeff Hogg wrote:
>
> > -----Original Message-----
> > From: Oleg Okunev <[EMAIL PROTECTED]>
> > To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> > Date: Thursday, December 09, 1999 12:44 AM
> > Subject: USR 56K external
> >
> > >Sorry if this is offtopic, but the manual that comes with the modem
> > >is written for Windows users (no commands list, switches description,
> > >etc. - good for nothing.)
> > >
> > >The problem is, when I try to use it, I consistently get ftp/hhtp
> > >download rates about 200 B/s. So I swear at my provider and
> > >sites on the routes, then plug in my old 28.8 internal, and get
> > >about 3 KB/s... (not once, so it does not seem to be a coincidence). I
> > >can communicate with the USR modem through minicom, and there are no
> > >visible delays, so it does not appear to be an IRQ/setserial/...
> > >problem).
> > >
> > >Anyone has experience with this modem? An init string trick? PNP?
> > >Or is it no good for Linux at all? (Well, perhaps my provider does not
> > >support X2/ITU56K, but could this be a reason to work so much slower
> > >than the old 28.8?)
> > >
> > I have had this same experience actually. To make it even stranger, I
have
> > had it work and not work using the "same" setup. At home, I connected
the
> > modem to my com1 port and set linux up to use it. It only managed about
50
> > to 200 bytes a second. I tried quite a bit of tinkering, but nothting
ever
> > changed its speed. Like you, I have an internal 33.6 modem that did
just
> > fine. However, here at work I have the same 56k external USR modem
working
> > well at 6-7Kb per second. Quite nice actually. I can see no difference
in
> > /proc/pci /proc/interrupts or in the modem init strings or dip switch
> > settings. The only thing that seems different is the motherboards
involved.
> > Perhaps this modem is having trouble with the onboard com ports on the
> > motherboards. If you have any luck, or anyone else knows whats up.. let
me
> > know..
>
> I don't know how many of you were concerned with this issue, but as you
> suspected there is a procedure for getting the speed of a com/serial port.
> Before I answer that question, you'll need to know some more on the
subject.
>
> 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.
>
> Use "dmesg | less" to find the speed of your com ports listed as tty00
(com1) =
> /dev/ttyS0, tty01 (com2) = /dev/ttyS1 and so on. If your com/serial ports
are
> less than 16550A, then you won't be able to use any high speed external
modem.
>
> *********************************************************************
> Signed,
> SoloCDM
>
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