[ 4984.392000] sierra 5-1:1.0: Sierra USB modem (1 port) converter detected
[ 4984.392000] usb 5-1: Sierra USB modem (1 port) converter now attached to ttyUSB0
[ 4984.396000] sierra 5-1:1.1: Sierra USB modem (1 port) converter detected
[ 4984.396000] usb 5-1: Sierra USB modem (1 port) converter now attached to ttyUSB1