Had actually received some of this gear unknowingly and while some of it does work...there were a few cases where that when a switch that would lose power the GBIC would not come back up in a 'no shut' state. Instead you had to console into the switch and issue a 'shut > no shut' on the interdace to get the port to come back. So while the technically do kind of work, it is not something I would recommend deploying in a mission critical switch/router.