B
babble: Meaningless transmission, generated by systems on the network, which result in interference with other signals on the line.
BABT: British Approvals Board for Telecommunications.
backbone: That part of the network which carries all the high density traffic. The backbone for a switched network usually consists of main trunk routes and switches, and in a data network it would include the main links between local rings.
backbone routeing: Routeing which includes only the backbone of a network.
Background Block Error Ratio (BBER): A measure of transmission performance, specified within ITU-T Recommendation G.826, relating to digital paths at or above E1 and T1. It applies to both PDH and SDH systems and is given by the ratio of errored blocks ...
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