The LambdaDriver^® EM2009-FXM/ EM2009-FTXM modules use an advanced Time Division Multiplexing (TDM) technology for their Fast Ethernet ports, which can interconnect 10 Mbps and 100 Mbps IEEE 802.3 standard networks over a single Full-Duplex fiberoptic trunk. Trunk lengths can range from a couple of kilometers to hundreds of kilometers.

Typical applications include:
1) Point-to-point interconnection of up to 8 LANs, one per port and fully isolated from one another (unlike with a switching technology), over one or two fibers.
2) CWDM/DWDM Ring interconnection using up to 8 FE channels/ services per wavelength while allowing the coexistence of additional services on different wavelengths.

Four 4-port models and four 8-port models are currently available:
Each model is identified by two options for the access ports (i.e., SFP or RJ45) and two options for the trunk ports (i.e., SFP or fi xed transceiver).

A unique feature enables the auto-negotiation function to be applicable across the whole trunk, not just locally. This means that in case a 10 Mbps LAN is connected on one side of the link and a 100 Mbps LAN is connected on the other side of the link, the auto negotiation will work over the whole link to reduce the 100 Mbps speed to 10 Mbps speed on the appropriate side.
SFP-based ports support any Fast Ethernet SFP.
The 4-port models occupy one slot space. The 8-port models occupy two slot spaces.

The aggregate trunk speed is 2.5 Gbps (even in the 4-port models) so that these modules can use regular OC48 SFPs, providing distances of up to 80 km without power or dispersion compensation. They can also use CWDM/DWDM SFPs to allow higher service aggregation over a single fiber or MMX SFP’s for a transport distance of up to 2 km over Multimode fibers.
For distances greater than 80 km, models with a fixed trunk port can be used (instead of SFP based trunk ports) to support distances of up to 400 km (600 km optional) without the need for DCMs (Dispersion Compensation Modules).

Features

• 4 or 8 SFP based 100BASE-FX ports


• 4 or 8 copper 10BASE-T or 100BASE-TX ports IEEE 802.3 compliant


• Auto MDI/MDIX crossover capability


• Supports both auto-negotiation systems and legacy systems without auto-negotiation capability


• Trunk port data rate 2.5Gbps


• Loopback on every port


• Performance monitoring Link


• Integrity Notification


• Support of local/remote loopback tests per port


• SFP Digital Diagnostics monitoring as per SFF-8472


• Front panel status LEDs


• SFP digital diagnostics as per SFF-8472

Applications

• Fully separated Ethernet services aggregation


• Fiber bottleneck relief - 8 times more capacity over the same fiber


• Private LAN’s aggregation over one wavelength in MAN WDM networks