Linux 3.2.0-4-686-pae # 1 SMP Debian 3.2.65-1 + deb7u2 i686 GNU / Linux (Wheezy)
(Base install without a graphical user interface)
It had no driver must be installed manually (=> the driver is already in the Linux kernel).
After plugging the adapter is automatically displayed on the server as follows Device: / dev / ttyUSB0
I had nothing manually mount.
The GSM module could immediately be addressed via / dev / ttyUSB0 exactly as previously via the real serial port.
Thank Debian! Thank Plugable!