| MRV Products 
 4-Channel, 4-Wavelength WDM with Gigabit Multimode Extender 
(GMX) Trunk
 
 
  
 The Fiber Driver? WDM45/GMX, combining advanced Coarse 
Wave Division Multiplexer (CWDM) technology and MRV Communications' 
award-winning Gigabit Multimode Extender (GMX) technology, carries four separate 
data channels with an aggregate bandwidth of 4 Gbps (8 Gbps at Full Duplex) to a 
guaranteed distance of 2 km over a Multimode fiber link.
 
 The physical 
properties of Multimode fiber typically limits Gigabitspeed transmissions to a 
distance of 550 meters or less, far shorter than the 2-kilometer standard when 
Multimode fiber is used for transmitting protocols such as FDDI and Fast 
Ethernet. This fact has left IT managers that need to upgrade their network in 
order to use Gigabit protocols with little choice but to abandon their Multimode 
fiber and install new Singlemode (SM) fiber. However, the GMX technology, 
available exclusively in the Fiber Driver product line and incorporated into the 
WDM45/GMX, gives network administrators another option.
 
 This achievement 
brings new life to existing Multimode (MM) fiber plants, making it possible to 
greatly increase network capacity while avoiding the cost, complications and 
lead times associated with the installation of new fiber. With support for 
Gigabit Ethernet, Fibre Channel, FICON, and other protocols, the WDM45/GMX is 
ideal for high-speed LAN, Metro Area Network (MAN), and Storage Area Network 
(SAN) applications. It provides a clear migration path to new technologies while 
protecting the investment in existing fiber.
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