Passive mux/demuxes are an excellent solution for bandwidth expansion when faced with fiber shortages. In many situations, a simple point-to-point connection would suffice, as in this 40-channel DWDM diagram below:

However, certain applications and network topologies would benefit from alternative architectures. In this article, we’ll guide you through two common architectures and in which circumstances to consider using them.

NOTE: Both architectures depicted below can be used for both single fiber and dual fiber deployments in many channel configurations.  

Option 1: Cascade

Passive cascade network architecture solutions

A cascaded architecture is ideal for providing service from a central office across a large, sparsely-populated area. 40 channels from a central office are muxed together and sent over a common pair of fibers. At the first location, 8 channels are demuxed and delivered, while the remaining 32 are sent through the express port of that mux/demux to the next location, at which the next 8 are delivered, and so on.

Option 2: Hub and Spoke

If you need to cover a higher-density urban/suburban neighborhood from a central location, consider the hub and spoke architecture. Starting from the same 40 channel mux/demux, the channels are muxed together and sent to a band splitter at a distribution point, which separates the channels into sets of 8, which are then sent to their respective locations.

Want to discuss these architectures and their component products in more detail? Our experts are available for an initial consultation. You can also browse some of our standard passive products here.

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