Switching system with separate supervisory links
First Claim
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1. A switching system comprising:
- (a) a main system control means,(b) a plurality of peripheral units, including peripheral unit control circuit means associated therewith and ports for connection of peripherals thereto,(c) a circuit switching network under control of the main control system connected via links to said peripheral units for carrying and switching transmission paths for signals transmitted between the peripheral units via said ports, and(d) a message switching network separate from the circuit switching network connected between the peripheral unit control circuit means and the main system control for carrying and switching supervisory and control signals related to the status of the peripherals between said peripheral unit control circuit means and the main system control means.
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Abstract
A digital switching system which is comprised of a circuit switching network under control of a main system control for carrying and switching transmission paths for signals transmitted between peripherals (i.e. lines, trunks, service circuits, etc.), and a separate message switching network under control of the main system control for carrying supervisory and control signals related to the status of the peripherals between peripheral unit management circuit controller(s) and the main system control.
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Citations
21 Claims
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1. A switching system comprising:
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(a) a main system control means, (b) a plurality of peripheral units, including peripheral unit control circuit means associated therewith and ports for connection of peripherals thereto, (c) a circuit switching network under control of the main control system connected via links to said peripheral units for carrying and switching transmission paths for signals transmitted between the peripheral units via said ports, and (d) a message switching network separate from the circuit switching network connected between the peripheral unit control circuit means and the main system control for carrying and switching supervisory and control signals related to the status of the peripherals between said peripheral unit control circuit means and the main system control means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A switching system comprising:
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(a) a main system controller, (b) a plurality of peripheral control units for connection to a plurality of peripheral units which are adapted to originate or receive digital signals, (c) a circuit switching unit connected to the peripheral control units for establishing transmission paths for the digital signals between said peripheral units under control of the main controller, (d) each peripheral control unit including controller means for monitoring the status of peripheral units and for controlling the connection of peripheral units to transmission paths leading to the circuit switching unit, and (e) a message switching unit connected to the peripheral control controller means for establishing transmission paths for call progress, instruction and/or confirmation message signals between the peripheral controller means and the main system controller whereby a call between peripheral units is facilitated.
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20. A switching system comprising:
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(a) a main system controller, including a digital processor connected to a parallel bus, (b) a circuit switching network including circuit switching means for switching transmission paths for carrying digital signals exclusive of supervisory and control signals between network ports, and a circuit switching network controller, the circuit switching controller being connected to said bus for receiving control signals from the main system controller of a kind predetermined to enable it to cause the switching means to interconnect said paths between designated ones of said ports, (c) a message switching network including message switching means having message ports for exclusively receiving and transmitting supervisory and control signals relating to said system, a message switch processor connected to said bus, said message switching means having a processor interface port connected to said message switch processor, said message switch processor being adapted to transmit signals to said main system controller, and through said message switching means to said message ports, and to receive signals via said message switch means from said message ports and transmit corresponding signals to the digital processor. - View Dependent Claims (21)
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Specification