The DEM-331T and DEM-331R bidirectional Gigabit SFP fiber transceivers are external transceivers designed for insertion in SFP (Small Form-Factor Pluggable) slots of network devices for transmission and reception of data signals on the fber cables. These transceivers provide the Gigabit operation and physical compactness to deliver the speed, reliable long-distance data transfer, and deployment fexibility that today’s fiber networks require.

The DEM-331T/20KM and DEM-331R/20KM transceivers are used in pair. The DEM-331T/40KM and DEM-331R/40KM transceivers are used in pair.

 

The DEM-331T and DEM-331R transceivers can be used to connect together switches, servers and fiber modules on a campus or metropolitan area network (MAN). Providing up to 20 km (DEM-331T/20KM and DEM-331R/20KM) or 40 km (DEM-331T/40KM and DEM-331R/40KM) of fiber cable  distance, these highly integrated transceivers offer low jitter performance for extended optical link support without any degradation in performance.

 

The DEM-331T and DEM-331R transceivers combine transmitting and receiving signals onto one fiber strand using two wavelengths. These transceivers are used in pair. At one end, one transceiver uses one wavelength to transmit and a second wavelength to receive. At the other end, the other transceiver flips that relationship.

 

The DEM-331T and DEM-331R transceivers use standard simplex LC connectors for fiber cable connection. They conform  to  industry standards and are  interoperable with D-Link Gigabit switches. Hot-swap capability allows network administrators to plug or unplug them from the SFP slots without having to turn off the power of the connected device.