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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