LinuxQuestions.org - How to tell which serial port a device is on

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How to tell which serial port a device is on

How do I tell which ttySx a device is on. I am specifically looking for the below FaxModem:

Code:

Bus 003 Device 007: ID 0803:9700 Zoom Telephonics, Inc. 2986L FaxModem

Thank you

Code:

[root@desktop ~]# lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 001 Device 003: ID 04f2:1060 Chicony Electronics Co., Ltd

Bus 001 Device 034: ID 0461:4d0f Primax Electronics, Ltd HP Optical Mouse

Bus 002 Device 003: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 003 Device 007: ID 0803:9700 Zoom Telephonics, Inc. 2986L FaxModem

[root@desktop ~]#

Look at the output of the dmesg command or look at the /dev/directory.

I have the 3095 model which also uses the cdc_acm module and is automatically configured as /dev/ttyACM0

Thank you Michael,

I earlier tried that, but had negative results. Did again and more promising this time. I think it is time to buy a new modem.

I couldn't find anything in /dev/directory, but did get this:

Code:

[root@desktop dev]# dmesg | grep tty

console [tty0] enabled

cdc_acm 3-2:2.0: ttyACM0: USB ACM device

[root@desktop dev]#

The modem is now working, so thanks again. Funny thing happened, however.

I unplugged the modem and plugged it into a different USB. Bunch of text covered the screen on the physical machine, and then Linux rebooted without asking me. Is this normal? Sounds like something Windows would do :(

Run dmesg or tail /var/log/messages while plugging in the device.

Or run ls -lrt before and after plugging in the device to see which tty has been added.

Edit: too slow...