Flexible Network Architectures

The LightningEdge CWDM solution supports trunk, star and ring topologies over dark fiber or lit fiber that is already in service with 1310 nm links. The following architecture examples demonstrate the Layer 1 and Layer 2 connectivity and make no assumptions about the applications the network is providing. The LightningEdge CWDM passive components are transparent to link speed and support any combination of 100 Mb/s and 1 Gb/s links. Link speeds shown in the following diagrams were selected for purposes of clarity.

CWDM Trunk Architecture

The LightningEdge CWDM solution can be deployed between facilities to provide a ten-fold increase in bandwidth without deploying new fiber. The figures below show how two CWDM 10λ Mux/Demux modules could be used.

CWDM Star Architecture

The LightningEdge CWDM solution can be used in a star architecture to drop fiber to multiple physical locations for access while leveraging the existing metropolitan fiber plant.

CWDM Linear Drop Architecture

The LightningEdge CWDM solution enables OADMs to be deployed as subscribers are turned up without any impact to existing services. Up to ten 3-port OSP OADMs can be cascaded from a 10λ Mux/Demux. The OSP OADMs can be placed in OSP splice enclosures or located at the customer premise permitting the CWDM solution to more easily adapt to the existing fiber plant.

CWDM Ring Architecture

The LightningEdge 4-port OADM and 10λ Mux/Demux CWDM components can be used to build 10-lambda route-diverse rings that provide maximum service protection with capital expenditures required only as new customers are added. The example to the left shows dedicated 1 Gb/s drops, but the Quality of Service (QoS) capabilities of the World Wide Packets LE-311 and LE-427 platforms permit multiple customers to be provisioned on each 1 Gb/s connection.

In Service Fiber

Current CWDM products have not been designed to be deployed with existing in service fiber and require dark fiber or replacement of existing 1310 nm optics with CWDM specific lambdas.

The LightningEdge 4λ and 10λ Mux/Demux CWDM components have been designed with an integrated expansion channel that facilitates simple integration with in service fiber plants. The 4λ and 10λ Mux/Demux CWDM components can be used back-to-back, or in conjunction with the 3-port OSP Wideband OADM to add/drop 1310 nm lambdas.

In Service Simplex Fiber

The LightningEdge CWDM solution has even been designed to add CWDM capabilities to in service single strand simplex fiber that typically use 1310 nm and 1550 nm lambdas for full-duplex communications. Up to 8 lambdas supporting four additional 1 Gb/s full- duplex links can be added to existing in service simplex fiber using two LightningEdge 10 l Mux/Demux CWDM components.

Continue

• Part 1:
  Introduction
• Part 2:
  LightningEdge CWDM Solution
• Part 3:
  Flexible Network Architectures
• Part 4:
  Conclusion