Replacable printed board assembly (pba)

Details Replacable printed board assembly (pba) Replacable printed board assembly (pba)

H - Electricity

04

M

H04M 11/06 (2006.01) H04L 12/56 (2006.01) H04L 12/66 (2006.01) H04L 29/12 (2006.01) H04M 1/738 (2006.01) H04Q 1/02 (2006.01) H04Q 1/14 (2006.01) H04Q 1/18 (2006.01) H05K 7/18 (2006.01)

Patent

CA 2444236

An architecture, as well as various components, of an asynchronous transfer mode (ATM) subscriber access multiplexer (ASAM) system can be implemented using an xDSL (x-Digital Subscriber Line) using DMT (Discrete Multitone) or CAP (Carrierless Amplitude Phase Modulation) between a plurality of subscribers and a corresponding plurality of line termination equipment in a shelf that also includes network termination equipment for connection to an ATM network. The line termination and network termination equipment are interconnected by a bus internal to the shelf for providing subscriber access. Separate lowpass filters are provided at each end of a twisted wire pair between the shelf and each subscriber equipment. A shelf can be used as a hub for connecting to a remote shelf that includes the line termination equipment for connection to subscribers. Although the internal bus of the shelf is shown in a non- redundant embodiment, an increased level of equipment protection can be provided by placing one half of a redundant equipment pair in one shelf and the other half in the other shelf and sharing network termination equipment between such shelves.

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