Fiber Driver-LD Family

  The Fiber Driver-LD (LambdaDriver) series consists of multi-functional, compact modular Wavelength Division Multiplexing (WDM) systems that can create up to 64 independent virtual fiber optic links over a single pair of fibers over distances of up to 100 km. The LD400, LD800 and LD1600 systems are targeted for Carriers’ Central Offices or multi-tenant office buildings and are ideally suited for MAN networks as well as large enterprise and Access networks.

  The product supports different network topologies such as PTP, Linear OADM and Ring.

  The Lambda Driver family operates in a DWDM (ITU Grid channels spacing) and CWDM (20nm channels spacing) technology. Each data stream can handle rates from 10 Mbps up to 2.5 Gbps. The systems support future upgrade to 10 Gbps services.

• Features
- Chassis: LD400/800/1600 are 19-inch rack mountable chassis with modular architecture hosting different MUX/DeMUX modules with 4, 8, 16, and 32 channels or OADM modules starting from single channel up to any number and mix of channels. Such flexibility offers a lower initial cost to service providers, allowing for fewer channels units at start, and ensuring simple system upgrades or future network re-configurations.
- In order to provide maximum system reliability, the LD400/800/1600 have a dual redundant power supplies option.
- Transponders: The transponders are single slot modules that provide an interface between the WDM system and single channel access port. Transponders are fully independent of the other channels and transparently support all data centric protocols, enabling service providers to mix different protocols such as SONET/SDH, Fast Ethernet, Giga-bit Ethernet, Fiber Channel, ESCON, etc. in the same chassis. LD800/1600 transponders possess the “data rate selection” functionality, allowing service provider the ability for remote rate provisioning.
- The transponders are hot swappable, allowing scalable in-service expansion or channel maintenance without interruption of service on other channels. The same transponder modules can be used in all Lambda Driver family chassis.
- TDM Sub-rate Multiplexer: By multiplexing multiple channels via TDM into DWDM or CWDM the number of ports in a single fiber can be multiplied by a factor of TDM implementation, thus increasing the efficiency of fiber use as well as saving precious physical space. The first TDM product in LD series is 4x ESCON multiplexer module. The ultra compact design is ideally suited for ESCON applications, which often require many parallel links. A combination of the 4x ESCON Mux in the LD800/1600 chassis achieves extremely high levels of density - 128 ESCON services can be run over one fiber pair (with 32 wavelengths). The electrically based multiplexing allows for a significant cost reduction and higher fiber utilization when compared to a pure optical multiplexing solution. The ESCON Mux link fiber interface can be 850nm/1310nm or CWDM grid for direct connection to the CWDM Mux.
- Protection options: An optional 1+1 protection module provides survivability in case of a main fiber break in Point-to-Point configurations. When the module discovers a fiber break condition in the main link, it automatically switches the WDM traffic to the secondary link within less than 10 ms.
- For Ring topologies O-BPSR (Optical Bi-directional Path Switched Ring) or O-UPSR (Optical Unidirectional Path Switched Ring) protection is provided by use of two transponders for each channel (full hardware redundancy) or 1+1 module per channel (Fiber redundancy).
- Management: The Lambda Driver LD series of products are SNMP and Web manageable (with MegaVision Web™) for configuration and fault monitoring.
- Local element management interface is provided for connecting to the VT100™ style text terminal (RS-232 DB9 connector) or 10/100 Mbps (RJ45 Ethernet connector). 100BaseFX port is provided for remote fiber access to the element manager. LD1600 has an option for redundant Management module. Remote login via TELNET is also supported.
- Optical Supervisory Channel (OSC) which runs together with the WDM data over the same fibers is optional. This option is included on the 1+1 redundancy module or special SRV module. SRV module combines the WDM traffic with 1310nm Management stream and can be used also for other traffic combination (like STMn 1310nm).
- WDM Link Distances: The link budget of the product allows distances up to 100 Km with regular SM fibers (0.25db/km or better). But for fiber spans with large attenuation, integrated Optical Amplifier (EDFA) modules can be used. 3 different types are supported:
- Booster – for amplification of the signal at the starting point of the link.
- In-Line - for amplification of the signal at the middle point of the link.
- Pre-Amp - for amplification of the signal at the end point of the link.
- The link distance limitation of 100Km for standard products, even with Optical Amplifiers, is due to the dispersion. This limit can be eliminated by use of a DCU (dispersion compensation unit) along the link or transponders with low dispersion feature.

• Applications
- Metro, Access, and Campus applications
- Carriers’ Central Offices or multi-tenant office buildings
- MAN networks
- Utilities and Pipeline networks
- Large enterprise and Access networks