Expiring Today—Celebrate National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


modem setup RH 5.2

Posted on 1999-01-24
Medium Priority
Last Modified: 2010-04-20
I have installed RH 5.2 and everything works great except for my modem setup.  I have a telepath 56 K voice modem that is plug and play.  Under win 98, I can't tell what comm port the modem is on. Do I have to turn plug and play off for modem setup?

Can somebody please tell me the exact steps I have to go through to get to the point where linux sees my modem and how I can verify that linux reckognizes it?
 Do I do all of this from linuxconfig>

Question by:dmontgom
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3

Expert Comment

ID: 1639256
try read the modem how-to under /usr/doc/HOWTO

or u can try the com3 or com4 for the modem.

Accepted Solution

abidn earned 720 total points
ID: 1639257
Actually, under win98, if you go Control Panel->Modem->Properties, you should be able to see Port.

If your BIOS offes an option to choose between "DOS/Windows" and "Other/Unix/Non-Dos" operating systems, select the latter one, save BIOS, and COLD start you PC. (Additionally, if it offers ESCD or Refresh Configuration, do select it ALONG with the switch to Non-Dos OS. See if modem is now recognizable.

I need to add that the basic issue is that most of these new 56K modem do not have a true serial controller (UART). They rely on the Pentium Processor and/or MMX instruction set. Since they do not have a UART, for OS/Applications which expect modems to be connect to a serial port, the drivers of these modems emulate (fake, if you like) a serial port. But that works with special drivers, which the OEM supplies with the card for the supported operating systems or, in the case of Win95/98, OEM supplied drivers may be prebundled with the OS.

RH5.2 comes with Kernel 2.0.36. Linux 2.0.x does not support Plug and Play (PnP) per se. Linux 2.1.x only partially does. Is the telepath modem an ISA modem? If so, you should be able to install ISAPnP package (tool). If you have a PCI card, then, although theoretically you could go boot from Win98 and have it initialized and then "switch" (that is, reboot) to Linux, I would suggest that in the case of PCI card, forget it -- buy an external modem, instead. (External modem suggested so that the same modem works with all OS). But before you discard the PCI card, boot from Linux and study /proc/pci file to see if you can sense any recognition of your modem.

ISAPnP tool comes with RH5.2, but still you may like to visit
http://www.roestock.demon.co.uk/isapnptools/ for additional/latest information/source.

tks -an.

Author Comment

ID: 1639258
My modem is ISA and is on com port 2 and pnp is enabaled.  In my bios setup for operating systems, the bios option that the OS was pnp was set to no.  Upon changing this option to yes, I rebooted into linux.  My sound card did not work.  I set the modem to com 2 and I tried to start minicom and I got the error:
"config file not found, using default"
"Devce /dev/modem is locked"

Should I buy another modem?


Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.


Expert Comment

ID: 1639259
Presently, I don't think  you need to buy a modem. You card is ISA card. Please do as follows:

1. Switch the BIOS setting "PnP OS?" back to "No" for the time being.

2. Install ISAPNP package and run "pnpdump." You can use this dump to configure your cards, alternatively, mail me the output from pnpdump.

tks -an.

Author Comment

ID: 1639260
Ok,  I think I am getting closer.

My modem from the modem setup is on com 2

1)  restored bios to original settings, sound works again.  Sound card is pci

2) installed latest isapnp using the rpm's

3) ran pnpdump -  saw my modem - the settins were commented.

4)  I ran "pnpdump --config" to have the program determine the optimal cofiguration and to uncomment the appropriate modem settings which were:

(INT 0 (IRQ3 (MODE +E)))

(IO 0 (SIZE 8) (BASE 0x0110))

Note, when I ran isapnp.gone, motherboard resources used were on com2 IO 0x2f8,8 irq3

Is the combination of the irq setting and the io setting unique or am I in conflict.  The irq settings are the same but the IO's are different

5) ran isapnp

6) ran minicom  when it starts I get the message "warning - configuration file not found - using default."

7)  In minicom, I initailize the modem and then dial a phone number.  I do not hear any activation of my modem and I get a time out and 45 seconds and minicom then rediles.  If my modem is working, should I hear a sound like in windows?

What left is their for me to do.  Am I getting closer?  Should I cnage the com port to 4 or 5?



Expert Comment

ID: 1639261
The file isapnp.gone correctly comments out the modem setting since any uncommented resources will NOT be used by isapnp tool. I tend to think that the setting 0x2f8 and irq3 is fine, especially if you have only one "true" serial port. Size 8 is ok, too, since the port uses addresses from 0x2f8 to 0x2ff. Try using different mode options.

By default, minicom used /dev/modem. I would rather log in to minicom, once, using -s option, and set the "dfl" or default serial line to /dev/cua1 (com2; irq3, io base 0x2f8); or, as an alternative; delete /dev/modem and link /dev/modem to /dev/cua1 (please backup if necessary; I am not responsible for loss or damage, direct, indirect, consequential or accidential, or whatver).

Also, try to enter "ATM1L3" before dialing telephone number. This is to make sure that if the modem card does have a speaker, it is used. (Please recheck the commands in that initialization string, namely M1 for "modem on during connect/negotiation" and L3 for "loudest" with your modem manual; these commands are rather Hayes compatible -- which incidentally is going out of business; but the command legacy is probably going to servive for a long time). For good measure, add "E1" (intention: enable local echo; again check with your manual).

Try dialling with AND WITHOUT the telephone cable connected to modem. Without the phone wire, you should get a "NO CARRIER" or "NO DIALTONE" error. If you don't, the card is not working yet.

Any way, I hope above works. tks -an.

Author Comment

ID: 1639262
I am still not able to get my modem to work.  I am going to have to get an external modem.  Thanks for all of your help.  By the way, when I use pnpdump, where is the configuration file stored so I can go edit it myself.  I can't find it.  What is the name of the file so I can uncomment some of the settings myself.  Should I also use the commant SETINT to set settings?  Thanks for all of your help.

Featured Post

Ransomware: The New Cyber Threat & How to Stop It

This infographic explains ransomware, type of malware that blocks access to your files or your systems and holds them hostage until a ransom is paid. It also examines the different types of ransomware and explains what you can do to thwart this sinister online threat.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction We as admins face situation where we need to redirect websites to another. This may be required as a part of an upgrade keeping the old URL but website should be served from new URL. This document would brief you on different ways ca…
Linux users are sometimes dumbfounded by the severe lack of documentation on a topic. Sometimes, the documentation is copious, but other times, you end up with some obscure "it varies depending on your distribution" over and over when searching for …
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial
Suggested Courses

719 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question