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EP0155025A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Digital switching network for switching signals of different bit rates

Assignee: Koninklijke PTT Nederland NV
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Filing: 1985-02-12
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Granted: —
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Expires: 2005-02-12
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Abstract

Abstract © Digital switching network for switching through subrate channels. The multiplexed subscriber's channels contain eight-bit words, each bit of which can form part of another signal. The number of bits in each word for a single signal is determined by the original rate of the signal. Each of the signals must have the possibility of being switched through to another destination. For that purpose it may be necessary to change the position of bits within a frame. Hence a separate time (6) and space step (4) has been arranged between the input time step (2) and the switching matrix (8). After that the switching matrix switches through eight-bit words. The positions of bits within a word can be exchanged in an additional space step (10) between the switching matrix (8) and the output time step (12) in order to make it possible to fill the outgoing frames as completely as possible.

Inventors

  • 👤 Franciscus Jacobus Van Vugt

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 11:18
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/50; H04L12/52; H04L12/525; H04Q; H04Q11/00; H04Q11/04; H04Q11/06

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 120 words
Digital switching network for switching digital signals of different rates contained in a multiplexed channel, which is divided into frames, words with a fixed number of bits per time slot being switched through every time, which switching network comprises for each of the multiplexed channels an input step and an output step and a common switch step for each of the channels to be switched through, characterized in that each input step comprises first means (4, 6) capable of changing the position of one or more bits within a frame, and in that each output step comprises second means (10) capable of changing the position of one or more bits within a word switched through by the switch step (8).
Claim 2
Dependent Claim 120 words
Digital switching network for switching digital signals of different rates contained in a multiplexed channel, which is divided into frames, words with a fixed number of bits per time slot being switched through every time, which switching network comprises for each of the multiplexed channels an input step and an output step and a common switch step for each of the channels to be switched through, characterized in that each input step comprises first means (4, 6) capable of changing the position of one or more bits within a frame, and in that each output step comprises second means (10) capable of changing the position of one or more bits within a word switched through by the switch step (8).
Claim 3
Dependent Claim 67 words
Switching network in accordance with claim I, characterized in that the first means comprise a spatial switch step (4) and a time switch step (6), allowing the possibility of switching through, word by word, the bits contained in an input buffer (2) via the switch step (4) to free positions on the lines of the time switch step (6), which lines can each contain a bit word.
Claim 4
Dependent Claim 21 words
Switching network in accordance with claim 1 or 2, characterized in that the second means comprise a spatial switch step (10).

References Cited (Backward Citations)

US3639693A Cited
FR2285040A1 Cited
GB2000418A Cited
GB2024565A Cited
US4412322A Cited

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