USB hardware modem

**arifsaha** · 09-20-2005, 08:06 PM

Hi!

How to get USB hardware modems works in Knoppix?
How do I know they are working?
Which tty device files the modems will be assigned to?

These are not USB winmodem, these are MultiTech's hardware-based MultiModemUSB. They worked out of the box with RedHat 7 before.

Thank you!

**tdjokic** · 09-20-2005, 08:44 PM

This is very interesting. Until today, I never heard about hardware USB modems. If they worked out of the box with RedHat 7 before, you can try same procedure with Knoppix - Linux is Linux.

**arifsaha** · 09-20-2005, 11:49 PM

Originally Posted by tdjokic

This is very interesting. Until today, I never heard about hardware USB modems. If they worked out of the box with RedHat 7 before, you can try same procedure with Knoppix - Linux is Linux.

This modem.
http://www.multitech.com/PRODUCTS/Fa...MultiModemUSB/

The modem conform to CDC ACM standard. In the older Red Hat system (kernel 2.2.16), the modems will show up as ACM devices (/dev/input/ttyACM* ). But I cannot find the acm modules in Knoppix. Where is it?

Thank you!

**rusty** · 09-21-2005, 12:43 AM

I have a best data hardware usb modem that works most of the time for fax tranmitting and receiving. On my 2.6.7 kernel hd installation (debian/mepis mongrel) the modem is at /dev/usb/ttyACM0.

Here is the output of lsmod|grep acm:

Code:

cdc_acm                10656  2
usbcore               114784  8 cdc_acm,usb_storage,usblp,uhci_hcd,ohci_hcd

Hope this helps.

**tdjokic** · 09-21-2005, 01:40 AM

There is ttyACM0 in kppp, at the same place where ttyS0 or dev/modem are. This is a Smartlink USB modem, with Linux suport, and I don't see any big diference between this modem and yours USB hardware modem: http://www.smlink.com/objects/SmartUSB56.pdf

I still don't understand what is hardware USB modem. Here ftp://ftp.multitech.com/usb/usb-linux2.txt there is explanation how this modems work in Mandrake 8.1 and RedHat 7.2., and this looks for me like any other winmodem that need driver or moduls. Maybe I am deadly wrong though.

**rusty** · 09-21-2005, 05:20 AM

FWIW, Best Data makes both a software (winmodem) and a hardware usb modem:

The hardware, controller based that I use.
http://www.bestdata.com/product.asp?pid=43&catID=4

The software one:
http://www.bestdata.com/product.asp?pid=44&catID=4

I tried the software one, which can be made to work under linux with the slmodem drivers, takes alot of work, and for live Knoppix CD (as of 3.3) not practical as you have to install the drivers at each boot. Kanotix bundles the slmodem in the live CD.

Zoom and US Robotics make both controller based and software modems, if I remember correctly, as well.

As has been pointed out in these forums before, the best dial-up solution for linux , especially for live CD , is a controller based, external serial modem.

**tdjokic** · 09-21-2005, 05:04 PM

Originally Posted by rusty

...Zoom and US Robotics make both controller based and software modems, if I remember correctly, as well.

Thank you for explanation. I must admit that until this moment i didn't know that there are diferent USB modems. This is very important, because new motherboard come with 1 or without serial port at all and soon there will be no serial port to conect external, serial modems.