Linux: Install Conexant USB modem

This article showing how to install Conexant USB modem on Linux machine.  The Conexant USB module has a RJ11 socket at one end for phone line connection and USB connector on another end to plug into USB port:

Identify modem model

1. Plug Conexant USB modem into machine.
2. Identity modem model:
   

   # lsusb 
   Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub 
   Bus 004 Device 002: ID 0572:1324 Conexant Systems (Rockwell), Inc. 
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub 
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub 
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Download modem driver

1. Visit http://www.linuxant.com to download the modem driver.
2. The modem ID in this example is 0572:1324, so DGC softmodem is the suitable driver.
3. For illustration purpose, this example use dgcmodem-1.13-1.i386.rpm.zip

Build modem driver

1. Prepare to build modem driver. You may skip some of the following rpm package depends on your system:
   

   # yum install dgcmodem-1.13-1.i386.rpm 
   # yum install kernel-devel-2.6.33

2. Configure modem driver:
   

   # /usr/sbin/dgcconfig

3. Check modem installation:
   

   # ls /dev/ttyACM* -al 
   crw-rw---- 1 root dialout 166, 0 Jan  8 15:04 /dev/ttyACM0 
   # ls /dev/modem  -al 
   lrwxrwxrwx 1 root root 7 Jan  8 15:04 /dev/modem -> ttyACM0

Reference

1. Linuxant. http://www.linuxant.com