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I had a working Asterisk setup with ttyUSB in /dev folder everytime I connect the device to the USB port. Now I tried the following steps and my ttyUSB1 and 2 disappeared

/etc/init.d/asterisk stop
rmmod option
insmod ./option.ko
insmod ./huawei_voice.ko
/etc/init.d/asterisk start

In hopes to recover, I tried these and still I did not get my ttyUSB working.

rmmod ./option.ko
rmmod ./huawei_voice.ko

I guess I need to do a insmod option, but I get a insmod: can't read 'option': No such file or directory

I guess I need to look into /lib/modules/ folder for options ?

/lib/modules/3.2.0-43-generic-pae/modules.alias        /lib/modules/3.2.0-43-generic-pae/modules.isapnpmap
/lib/modules/3.2.0-43-generic-pae/modules.alias.bin    /lib/modules/3.2.0-43-generic-pae/modules.ofmap
/lib/modules/3.2.0-43-generic-pae/modules.builtin      /lib/modules/3.2.0-43-generic-pae/modules.order
/lib/modules/3.2.0-43-generic-pae/modules.builtin.bin  /lib/modules/3.2.0-43-generic-pae/modules.pcimap
/lib/modules/3.2.0-43-generic-pae/modules.ccwmap       /lib/modules/3.2.0-43-generic-pae/modules.seriomap
/lib/modules/3.2.0-43-generic-pae/modules.dep          /lib/modules/3.2.0-43-generic-pae/modules.softdep
/lib/modules/3.2.0-43-generic-pae/modules.dep.bin      /lib/modules/3.2.0-43-generic-pae/modules.symbols
/lib/modules/3.2.0-43-generic-pae/modules.devname      /lib/modules/3.2.0-43-generic-pae/modules.symbols.bin
/lib/modules/3.2.0-43-generic-pae/modules.ieee1394map  /lib/modules/3.2.0-43-generic-pae/modules.usbmap

What do I do to fix it ? Which folder and file am I looking for here ?

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I restarted the server and all came back to normal.

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