Mean Time between Failures (MTBF) is the arithmetic mean (average) time between failures of a system. The MTBF is typically part of a model that assumes the failed system is immediately repaired (zero elapsed time) as a part of a renewal process. The following number shows the MTBF of LCSI Industrial Managed Ethernet switch products based on MIL-HDBK=217F to justify LCSI industrial managed switches meet harsh environment and also provide 5-year warranty.

Product Model	Description	MTBF in hours
IES-M082C	8 x 10/100TX +2 x10/100/1000TX /Dual Speed SFP Combo,-10 to 60℃	230105
IES-M082CE	8 x 10/100TX +2 x10/100/1000TX /Dual Speed SFP Combo,-40 to 75℃	272761
IESP-M082C	8 x 10/100TX w/POE Injector  +2 x10/100/1000TX /Dual Speed SFP Combo,-10 to 60℃( 8-port * 15.4 watt )	190287
IESP-M082CE	8 x 10/100TX w/POE Injector  +2 x10/100/1000TX /Dual Speed SFP Combo,-40 to 75℃ ( 8-port * 15.4 watt )	190287
IES-M162CE	16 x 10/100TX +2 x10/100/1000TX /Dual Speed SFP Combo,-40 to 75℃	220111
IGS-M062C	6 x 10/100/1000T + 2 x10/100/1000TX /Dual Speed SFP Combo,-10 to 60℃	220593
IGS-M044GB	4 x 10/100/1000T + 4x 100/1000 SFP, -10 to 60℃	286945
IGS-M044GBE	4 x 10/100/1000T + 4x 100/1000 SFP, -40 to 75℃	289385
IES-M062F-SC-MM	6 x 10/100TX +2 x 100FX SC multi-mode 2km, -10 to 60℃	252087
IES-M062F-SC-SM	6 x 10/100TX +2 x 100 FX SC Single-mode 30Km, -10 to 60℃	252087
IES-M062FE-SC-MM	6 x 10/100TX +2 x 100FX SC multi-mode 2km,  -40 to 75℃	315109
IES-M062FE-SC-SM	6 x 10/100TX +2 x 100 FX SC Single-mode 30Km, -40 to 75℃	315109