The telecommunications illustrated dictionary by Petersen, Julie K.; Petersen, Julie K
By Petersen, Julie K.; Petersen, Julie K
With the speedy speed of advances in communications, this moment version of this dictionary contains greater than one thousand new definitions.
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Additional resources for The telecommunications illustrated dictionary
The total number of channels of the tributaries equals the number of channels carried over the multiplexed bearer; thus, there is no loss of traffic. 5 Mbit/s or 2 Mbit/s signal. It also provides demultiplexing and digital-to-analogue conversion for the return direction of transmission. For 64 kbit/s digital tributaries, it provides only the multiplexing and demultiplexing functions. 5 Mbit/s or 2 Mbit/s signals (or signals at higher rates) onto a common bearer. Normally, a channel will be multiplexed through discrete multiplex levels.
Public networks must adhere to a set of standards for numbering, transmission performance and interfaces between customers' attachments and the network. Private networks have none of the above constraints applying to communication within the organisation. However, there are standards and rules applying to communication which extends to the public network (at either originating or terminating end). The provision of a virtual-private-network service by a public-network operator is complicated by the fact that VPNs do not conveniently fit within the regulatory and standards framework for public or private networks.
Furthermore, the discipline of this hierarchy enables different performance and capabilities to be provided at each level in the hierarchy. 1 Customer-access networks The customer access network or local distribution network [3,4,5,6] normally provides a pair of wires from each customer's premises to the local exchange. It is also sometimes called the local loop. 4, each customer is served from a distribution point (DP), which may be overhead or underground. Multipair cables connect the DPs to the local exchange.