1 – To give them the advantages of faster technologies available
Fibre Ethernet is a fibre optic cable connected all the way from the exchange into the customer’s premises. Due to the cost of planning, equipment and engineering work this is usually the most expensive technology, often taking the longest time to install. Where a carrier has already terminated a fibre in a building (known as a ‘lit’ building), lead times and costs reduce dramatically. Available speeds are practically unlimited and are not distance dependent.
FTTC is a broadband service built on BT Openreach infrastructure where speeds of up to 80Mb/s downstream are attainable by limiting the length of copper that the service has to run over. This is achieved by running fibre from the serving exchange to cabinets closer to the customers’ premises. FTTC can be supplied over an existing telephone line, which can continue to be used for making and receiving calls. FTTC is a contended service and at peak times the amount of bandwidth available may reduce. It is much more stable and reliable than standard broadband. Virgin Media Business offer a similar product with speeds up to 300Mbs. There are also a number of niche carriers that tend to target areas not served by BT or Virgin e.g. business parks.
EFM (Ethernet First Mile) is delivered using copper from the exchange and pairs are ‘bonded’ together to increase the maximum speed attainable. Speeds of up to 35Mb/s are achievable dependent upon how far the customer site is from the serving exchange.This is a leased line and both upstream and downstream are uncontended.
Ethernet over Fibre To The Cabinet (EoFTTC) uses copper from a local fibred cabinet to the customer’s premises. It comes with its own dedicated telephone line which is usually included in the price. At the exchange, rather than being connected to a carrier’s broadband network, it is plugged into their Ethernet network. This creates an uncontended, symmetrical business-grade leased line. EoFTTC has a maximum symmetrical speed of 20Mb/s.
Fibre Ethernet leased lines offer symmetrical, uncontended speeds up to 10GB. They are popular with larger companies that need more, dedicated bandwidth and with organisations that rely heavily on their internet connection for their core business.