modem - usb to serial configuration

Linux and Unix-Like Linux
1

I have a serial modem connected to a usb port using an adapter cable. The system is a HP DL360. RedHat ES3.0

I am using the device /dev/ttyUSB0

When I issue the command "mgetty ttyUSB0" I get the following output in the log file.

How do I get the system to see the modem.

12/02 14:17:55 SB0 mgetty: experimental test release 1.1.30-Dec16
12/02 14:17:55 SB0 check for lockfiles
12/02 14:17:55 SB0 locking the line
12/02 14:17:56 SB0 WARNING: DSR is off - modem turned off or bad cable?
12/02 14:17:56 SB0 lowering DTR to reset Modem
12/02 14:17:56 SB0 send: \dATQ0V1H0[0d]
12/02 14:17:57 SB0 waiting for ``OK''
12/02 14:18:17 SB0 timeout in chat script, waiting for `OK'
12/02 14:18:17 SB0 init chat timed out, trying force-init-chat
12/02 14:18:17 SB0 send: \d[10][03]\d\d\d+++\d\d\d[0d]\dATQ0V1H0[0d]
12/02 14:18:21 SB0 waiting for ``OK''
12/02 14:18:41 SB0 timeout in chat script, waiting for `OK'
12/02 14:18:41 SB0 init chat failed, exiting...: Interrupted system call
12/02 14:18:41 ##### failed in mg_init_data, dev=ttyUSB0, pid=28154

2

Where do i get the vaules for this command (VVVV and PPPP)?

I have a Multitech serial modem.

insmod usb-serial.o vendor=0xVVVV product-0xPPPP

3

Hello jshoovie
1)The answer to your question is:
you can get the list from wwww.linux-usb.org .

2)Can you help me in configuring my USB->serial converter.

a) I am working on Fedora core 4(2.6.11).When I giv the insmod command, I get the following answer:
cannot find usb-serial.o

b)I downloaded cp2101 drivers CP2101x.RedHat8v1.1.tar.gz .It has 4 filesone of which is usbserial.o .Where to copy the file.

c) It is said the kernel 2.6.12 supports usb. How to configure or compile it with my kernel.(for hotplug support)

d) After plugging my cable and typing dmesg.The o/p is:
new full speed usb device using ohci_hcd and address 3.

e)But to configure under minicom , I did not find /dev/usb/ttyUSB0 port.
Do we need to make the usb0 node ourselves using
mknod /dev/usb/ttyUSB0 c 188 o
or is it existing already.

f)Anyone,Please help me.Please tell me step by step configuration with commands used.I am a newbie.