Shared lines equipment, especially for B-ISDN switching system
First Claim
1. Apparatus for shared lines for a B-ISDN switching system having subscriber stations, wideband concentrators and a central wideband switching network, the apparatus comprising:
- wideband concentrators (K) of a modular structure, which each include;
(a) an internal bus system (RB) and(b) an interface circuit (H2i) for coupling with the central wideband switching network (Z), so that the wideband concentrators communicate with the central wideband switching network via the internal bus system and the interface circuit.
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Accused Products
Abstract
Large-scale time-division switching arrangements often consist of a central switching network and a series of so-called concentrators. For establishing an H1 switching a series of wideband concentrators are connected to a central wideband switching network if the wideband concentrators are of a modular structure and communicate through an internal bus system and an interface circuit with the central wideband switching network connected thereto, a distribution switching in the direction of the subscriber station and a testing of the concentrators while in operation can be effected in a simple way.
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Citations
16 Claims
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1. Apparatus for shared lines for a B-ISDN switching system having subscriber stations, wideband concentrators and a central wideband switching network, the apparatus comprising:
- wideband concentrators (K) of a modular structure, which each include;
(a) an internal bus system (RB) and (b) an interface circuit (H2i) for coupling with the central wideband switching network (Z), so that the wideband concentrators communicate with the central wideband switching network via the internal bus system and the interface circuit. - View Dependent Claims (2)
- wideband concentrators (K) of a modular structure, which each include;
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3. Apparatus for shared lines for a B-ISDN switching system which includes subscriber stations and a central wideband switching network, the apparatus comprising a least one wideband concentrator (K) for coupling between the subscriber stations and the central wideband switching network, each wideband concentrator comprising:
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(a) at least one internal bus system (RB); (b) at least one interface circuit (H2i) for coupling with the central wideband switching network (Z); and (c) at least one concentrator module (C) which includes; (i) two memory banks (A,B); (ii) a serial-to-parallel converter (S/P); (iii) a parallel-to-serial converter (P/S), the two memory banks communicating with the internal bus system via the serial-to-parallel and parallel-to-serial converters; and (iv) an H1 interface circuit (H1SS) for communicating between the two memory banks and a subscriber group circuit (TG); so that during each frame period data are written to only one of the two memory banks and data are only read out from the other of the two memory banks and so that the wideband concentrator communicates via the internal bus system and the interface circuit to the central wideband switching network. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification