KERNEL=="ttyUSB*", ENV{ID_VENDOR_ID}=="12d1", ENV{ID_MODEL_ID}=="1c05", ENV{ID_USB_INTERFACE_NUM}=="00", SYMLINK+="gsm_modem", RUN+="/usr/bin/pon provider" SUBSYSTEM=="usb", ACTION=="remove", ATTRS{idVendor}=="12d1", ATTRS{idProduct}=="1c05", RUN+="/usr/bin/poff provider"