Currently, fiber to the home (or FTTH) offers fiber connections that terminate in the user in a device called ONT, which is supplied by the operator, although in the next few years this service evolves in a similar way to that of the dark fiber together with the equipment that the customer already has.
Traditionally the transmission of laser signals through the fiber was done by means of a laser that sent a signal encoded in zeros and ones (off, on) of a certain wavelength or frequency of light. The capacity to transport information with this system normally reaches 10 Gbps. Currently there are systems capable of transmitting, through a fiber, "n" signals using the same traditional mechanisms of off-ignition of lasers. It is what is known by multiplexing wavelength through fiber or the transmission of various colors or frequencies through fiber. In Spain, transport systems are manufactured by introducing "n" lasers of different "color" or wavelength (or frequency) in the fiber, which multiplies, in this simple way, the capacity of this medium until the total capacity of the fiber is converted. fiber link, for example, at nx 10 Gbps. There are very few leading companies in the world that can transmit 240 wavelengths or lambdas in the fiber. Fibernet in Spain is one of them, offering capacities of 2.4 Terabits / sec per fiber link. So that we can get an idea of what this transmission capacity means, we could say that with a single link it would be possible to connect the entire population of Spain via telephone from one end to the other if a traditional system were incorporated into the Fibernet transmission solution. telephony over fiber.
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