This Cisco compliant GLC-LH-SM is a 1000BASE-LX/LH SFP 1310nm 10km   transceiver module. The GLC-LH-SM transceiver module provides a low cost   high-performance connection. The GLC-LH-SM is 100% compatible with all   Cisco series switches and modules which support SFP transceivers.
   
   Features & Specifications
    -  Form Factor: SFP
-  Device Type: Transceiver module
-  Interface (Bus) Type: Plug-in module
-  Connectivity Technology: Wired
-  Application: 1000BASE-LX/LH
-  Data Transfer Rate: 1Gbps
-  Wavelength: 1310nm
-  Max Distance: 10km
-  Fiber Type: SMF/MMF
-  Connector: Duplex LC
-  DDM: Without DDM
-  Operating Temperature: 0~70 °C
-  Compliant with MSA SFP Specification