Hi,
Hi if you want to use COM1 and COM2 with internal modem you will have to disable
the serial ports in the BIOS.
Usually COM1 uses IRQ4 and COM2 uses IRQ3.
To use internal modems on others ports is not really standard. You need to have
modems you can configure to work on more exotic IRQ/ADDRESS couple.
If you have PCI modem may be it works I don't know.
The Byterunner card I use shares IRQ's I just use IRQ7 for all 8 serial ports
and it doesn't affect the performances.
For your hangup problem I have no idea . sorry.
Philippe
Rajiv Ghai <[EMAIL PROTECTED]> on 11/03/99 02:01:35 AM
To: Philippe Vivarelli/Intl/Conexant
cc: [EMAIL PROTECTED]
Subject: Re: How many modems for ppp connection?
Hi,
Thanks for the very helpful advice. I have been through the byterunner
website and it seems they have quite a variety of serial cards to pick from.
Actually my question was related to internal modems. I was trying to use
internal modems mounted on the ISA/PCI slots on my PC and found I can use
four using COM1 to COM4 (ttyS0 to ttyS3). Now they way I understand it each
internal modem needs one IRQ, one COM Port and one slot to mount it in my PC:
Now there are 10 available IRQ's on my PC = 3,4,5,7,9,10,11,12,13,15. So
given 10 IRQ's the maximum number of modems could in theory be 10.
There are six free ISA/PCI slots in my PC so the maximum number of internal
modems could in theory be 6.
So my question was that could one create additional ttySx ports, say ttyS4
(COM5) and ttyS5 (COM6) and install 6 internal modems ?.
If not and I have to use the additional serial cards then byterunner offers
an 8-port card using COM1 to COM7 and 10 IRQ's. Would that mean the maximum
I can install using a combination of internal/external modems is 7 modems
or 10 modems ?
In your setup do you share the IRQ's ? I believe performance gets affected
when you share IRQ's but what is your experience if you share an IRQ with
more than one modem ?
Coming back to the modem hang-up problem. If I dial-in using a normal
phone, and let mgetty pick -up the call and immediately hang-up the line,
the modem gets stuck and the mgetty log file shows a series of numbers
[95][18] repeating continously. Basically the problem occurs only if the
line is hung-up before the login prompt. If I dont hang-up immediately ppp
negotiates a connection without any problems. If I disconnect after the ppp
connection is established mgetty respawns without any problem. I have tried
fiddling with the initialization string in mgetty.config for three days and
I think I have finally given up. I dont know if anybody else has tried this
experiment ie. dial-in to the modem and immediately hang-up. The mgetty FAQ
shows that this problem does exist with some modems but the solution
offered like changing &D3 to &D2, C1 to C0 or adding S13=1 in the
initialization string does not work for me. I also tried S95=44 but no luck.
Regards
Rajiv
---------------------------------------
At 08:59 AM 10/29/99 +0200, you wrote:
>Hi
>
>I have a test setup with 10 serialports on my Linux PC.
>Two ports are the regular serial ports and 8 comes from an extension card
called
>Turbo 8COM I/O Adapter from ByteRunner (www.byterunner.com)
>And I run test on 6 modems without problem.
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