Microducts are small ducts for the installation of small microduct fibre optic cables. They have a size ranging from typically 3 to 16 mm and are installed as bundles in larger ducts.
Microducts are typically small-diameter, flexible, or semi-flexible ducts designed to provide clean, continuous, low-friction paths for placing optical cables that have relatively low pulling tension limits. As stated in industry requirements document Telcordia GR-3155, Generic Requirements for Microducts for Fiber Optic Cables, microduct products are expected to:
- Be compatible with existing construction designs and building configurations for both riser- and plenum-rated applications, including cable blowing apparatus.
- Allow cables to be safely deployed through pull lines or strings using less than 50 lbs of force, and through cable blowing techniques at typical deployment speeds of 100-200 feet per minute.
Advantages over traditional cabling are as follows:
- A branch can be made simply, any place, at any time
- Low initial costs
- The network can grow on demand
- Easy to install microduct routes in occupied ducts
- Easy to replace old cables through the network
- Possibility to migrate from copper balanced cables to fibre optic cables
Reference:
Microducts
http://en.wikipedia.org/wiki/Microducts
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