Media module MM991-4LD, 4x 100 Mbps BFOC, SM glass, max. 26 km

•SCALANCE X accessory; Media module MM991-4LD; 4x 100 Mbit/s BFOC ports, optical; single-mode optical up to max. 26 km.
•Fully modular Layer 3 switches can be flexibly fitted with 4-port media modules.
•Using media modules enables: Extending the network by plugging additional media modules into unused slots at a later time (also during operation),
•Extending the network by plugging additional SFP+ or SFP plug-in transceivers into unused SFP+ slots at a later time,
•Changing cabling technology, e.g. conversion from copper to fiber-optic cables or from multi-mode to single-mode FOC,
•Changing the transfer rate, e.g. switching from SFP plug-in transceiver (1000 Mbps) to SFP+ plug-in transceiver (10 Gbps).
•Unlimited flexibility during network expansions (e.g. more terminal devices), conversion (e.g. switching from copper to fiber-optic cables),
•or performance enhancement (e.g. from Gigabit to 10 Gigabit) through modular construction using media modules and SFP+ or SFP plug-in transceivers.
•Reduction of storage and maintenance costs by focusing on only a few basic unit variants.