Broadband Communities

JUL 2018

BROADBAND COMMUNITIES is the leading source of information on digital and broadband technologies for buildings and communities. Our editorial aims to accelerate the deployment of Fiber-To-The-Home and Fiber-To-The-Premises.

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J U LY 2 0 1 8 | w w w. b r o a d b a n d c o m m u n i t i e s . c o m | B R O A D B A N D C O M M U N I T I E S | above the neutral and down to 6 to 12 inches below it. Forty inches below the neutral is where the non-energized, or communications, space begins. at's where you see the cable for CATV and all the telephone wires. BBC: If you're deploying fiber, why would you rather use the energized space? And why would electric utilities allow it? CG: e communications space is often congested, and installing cables in it can be complicated. Even if you're trying to install ADSS (all-dielectric self-supporting) cable, which takes up less room, you may not be able to fit it into the communications space. So the alternative is to put it in the energized space. e key to doing this is to use qualified electrical workers. Utilities will allow workers in the energized space only if they're qualified. (OSHA standards define who is qualified to work in this space.) An electric cooperative or a municipal electric utility may be happy to allow qualified workers for an ISP into the energized space if the ISP will be providing services to its customers. BBC: Can you explain the difference between using ADSS cable and using strand and lash for aerial deployments? What are the advantages of ADSS? CG: ADSS cable cannot conduct electricity, so it's safer to use in the energized space. It can be used in the communications space as well. In addition, because it has support built in, it can hold itself up without additional support or lashing. Typically, because there's no need to add hardware or strengthen the pole, ADSS is less expensive. Structural guy wires are already in place for the neutral wire, and that existing support is usually enough for ADSS. When non-ADSS cable is used, the strand and lash method is needed. In this case, a rigid wire (the strand) is attached to the pole, and the fiber optic cable is lashed to that. It's more expensive and complicated – anchors, pole changes and system improvements can cost millions of additional dollars. In fact, strand and lash requires so much up-front make-ready cost and stresses the poles so much that co-op and municipally owned power distribution companies should not ever consider it. ADSS is lighter, better for the system and overall much cheaper. BBC: en why does anyone use the strand and lash method? CG: It's just a traditional way of doing it in the telecom world. Make- ready is considered a traditional way to start out the construction process. So you could say it's more a tradition than a reason. Aerial fiber deployment is usually less expensive than boring or plowing.

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