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How ttyUSB* created on my 3G modem problem

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Operating Systems Linux Ubuntu How ttyUSB* created on my 3G modem problem
# 1  
Old 02-27-2011
How ttyUSB* created on my 3G modem problem
Hi

I would like to ask if someone knows the explaination of the /dev/ttyUSB*. I had a internet connection 3G usb dongle modem and need to restart before it detected the mobile broadband in the network manager. Before i reinstalled the lucyd lynxs i never meet this problem. But after i reinstalled the lucyd lynx i need to put the usb modem first before starting my system.. but if i plug my usb modem in a running state the network manager doesn't detect the mobile network therefore a remedy is plug first and restart.

One thing i notice if i had a working usb modem is i had a /dev/ttyUSB1-4 but if i plug it later and dont have a working usb modem.. i dont have the /dev/ttyUSB*.

I dont know if i this is the cause or the services that doesn't start if a plug the usb in running state..

Hope someone knows and understand my problem.
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LEARN ABOUT NETBSD

uhmodem

UHMODEM(4)						   BSD Kernel Interfaces Manual 						UHMODEM(4)

NAME

     uhmodem -- USB support for Huawei 3G wireless modem device

SYNOPSIS

     uhmodem*  at uhub?
     ucom*  at uhmodem?

HARDWARE

     The uhmodem driver supports the following adapters:

	   Huawei E220
	   E-mobile D01HW
	   E-mobile D02HW
	   NTT DoCoMo a2502

DESCRIPTION

     The uhmodem driver provides support for the Huawei 3G wireless modems and its variants.  This type of device has multiple com ports.  And
     some modems have own storage to contain its device driver (for Windows).  The uhmodem driver can handle all of these functions on the device.

     When the device attached, it will attach multiple ucom devices.  The former one is main com device to use communication with your network
     provider, and others are sub com devices to monitor the condition of data communication and/or network status.  These com devices can be used
     simultaneously.

     The device is accessed through the ucom(4) driver which makes it behave like a tty(4).

SEE ALSO

     tty(4), ubsa(4), ucom(4), usb(4)

HISTORY

     The uhmodem driver first appeared in NetBSD 5.0.  Separate from ubsa driver.

BSD
								  January 8, 2008							       BSD