A recent development in fiber optic cable deployment promises to cut both the costs and time required to build FTTH networks in the metropolitan terrain. Fiber deployments that aren't suspended on power poles typically require trenching a three foot channel in the public right-of-way. That means cutting concrete or asphalt surfaces and digging out a substantial part of the roadbed so that a fiber conduit can be safely buried. Rural fiber deployments can have the luxury of what's known as continuous conduit laying, where a piece of heavy equipment lays fiber optic cable conduit by forcing it into soft ground. That isn't possible in the concrete jungle. TeraSpan's micro trenching and Vertical Inlaid Fiber (VIF) has changed the equation for urban fiber deployments. Micro Trenching requires only a little more than a quarter inch wide by six to twelve inch deep duct in the public right-of-way. Road closures and general public disruption are keep to a minimum when micro trenching. Cost savings is estimated at 60% to 80% of normal trenching.
TeraSpan is headquartered just over the Canadian border in Vancouver, British Columbia.