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The access network is that portion of a public switched network that connects access nodes to individual subscribers. More simply, it is the last link in a network between the customer premises and the first point of connection to the network infrastructure – a point of presence(PoP) or central office(CO). The access network has higherto consisted predominantly of passive, twisted-pair copper wires.
The access network has consistently been regarded as a bottleneck in the provisioning of data communication services. This is primarily because the bandwidth available has lagged behind that provided within local-area networks(LANs) and in the upper echelons of the network(in metropolitan and core networks, for example), where concentration factors and economies of scale have allowed optical fiber to unleash significant bandwidth capacity.
The optical access network is that part of the access network implemented using optical fiber. Optical access offers the promise of greatly increased access network bandwidth by up to several gigabits per second(Gbps)- and most likely more, as technology advances.
This bandwidth availability opens up new architectural possibilities for the provisioning of high-bandwidth services. With the access network as a bandwidth bottleneck, it is necessary to place some sort of processing equipment at the customer premises to manage or control the amount of data transmitted over an access connection. Once the bottleneck is opened, new opportunities present themselves-such as the option of carrying larger quantities of data across an access link to be routed, switched, or processed in some other way at a PoP or CO. In such cases where economies of scale come into play, reducing the cost per bit of handling data, it is possible to simplify the equipment provided at the customer premises.
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The access network has consistently been regarded as a bottleneck in the provisioning of data communication services. This is primarily because the bandwidth available has lagged behind that provided within local-area networks(LANs) and in the upper echelons of the network(in metropolitan and core networks, for example), where concentration factors and economies of scale have allowed optical fiber to unleash significant bandwidth capacity.
The optical access network is that part of the access network implemented using optical fiber. Optical access offers the promise of greatly increased access network bandwidth by up to several gigabits per second(Gbps)- and most likely more, as technology advances.
This bandwidth availability opens up new architectural possibilities for the provisioning of high-bandwidth services. With the access network as a bandwidth bottleneck, it is necessary to place some sort of processing equipment at the customer premises to manage or control the amount of data transmitted over an access connection. Once the bottleneck is opened, new opportunities present themselves-such as the option of carrying larger quantities of data across an access link to be routed, switched, or processed in some other way at a PoP or CO. In such cases where economies of scale come into play, reducing the cost per bit of handling data, it is possible to simplify the equipment provided at the customer premises.
Click here to download more information
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