Integrated voice/data/control switching system

• US 4,597,077 A
• Filed: 05/17/1984
• Issued: 06/24/1986
• Est. Priority Date: 05/04/1983
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: CXC Corporation
• Inventors: Teener, Michael D., Walter, Keith D., Rigsbee, Everett O. III, Marrone, Edward S., Schumaker, Richard E., Godding, Patrick N., Gates, Stillman F., Nelson, Gary A.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): KUNTZ, CURTIS A
• Application Number:
  US06/611,463
• Time in Patent Office: 768 Days
• Field of Search: 370/60, 370/94, 370/88, 370/58, 370/85, 179/18 ES
• US Class Current: 370/352
• CPC Class Codes: H04L 12/42 Loop networks
• CPC Class Codes: H04L 25/4904 using self-synchronising codes, e.g. split-phase codes
• CPC Class Codes: H04L 5/24 with start-stop synchronous converters
• CPC Class Codes: H04M 9/025 Time division multiplex systems, e.g. loop systems
• CPC Class Codes: H04Q 2213/13332 Broadband, CATV, dynamic bandwidth allocation

Abstract

A communications switching system is provided for transferring information between a plurality of node information highways (66,68) and between node information highways (66,68) and station ports (284,286), the system (221) comprising a plurality of switches (243) each switch having a station to highway section (244) and a highway to station section (246), each section (244,246) being in electrical communication with a station port (284,286) and with a plurality of node information highways (272,274). The station to highway section (244) and highway to station section (246) are each independently and dynamically configurable to communicate a selected bandwidth of information between the station ports and a selected node information highway. Each section (244,246) further being operative to serially integrate control information into the data stream communicated to the station port, and to derive control information from the serial signal stream received from the station port. Thus, connectivity requirements between the station device and the network signal stream are simplified and greater utilization of the network signal stream is possible.

Claims

1. A communications system for enabling transmission of data and control information between a station device (290) and a node (21) using a shared time multiplexed signal path, the system comprising:

a digital communication device (614) operative to generate and receive data information, device (614) further being operative to selectively request access to the facilities of a packet channel circuit;

a controller (612) connected to the device (614) and operative to enable a path to the packet channel circuit in response to the request for access to the facilities of a packet channel circuit;

station ports (284,286) connected to the station device (290) and to the node (21);

a microtelephone controller (611) connected to the station ports (284,286), device (614) and controller (612), the microtelephone controller (611) being operative to communicate data between the device (614) and the station ports (284,286) and to communicate control information between controller (612) and the station ports (284,286), the controller (611) being further operative to formulate the control information and the data information in a time multiplexed signal stream; and

wherein the node (21) is adapted to receive the time multiplexed signal stream and to direct the control information to a packet channel circuit (385,390) and to direct the data information to a data network (382,384, 386,388).

2. A communications switching system as recited in claim 1 wherein the node (21) further comprises a plurality of switches (243), each switch having a station-to-highway section (244) and a highway-to-station section (246), each section (244,246) being in electrical communication with a station port (284,286) and with a plurality of node information highways (272,274) such that serial information data from the node information highways (272,274) is transferred in a selected format by the highway-to-station section (246) to a station port (284,288), and such that serial data from the station port (284,286) is transferred by the station-to-highway section (244) to a node information highway (272,274), each section (244,246) including information channel circuits (182,184,186,188) adapted to communicate data information between at least one of the station ports (284,286) and at least one of the information highways (272,274), each section (244,246) further including packet channel circuits (189,190) in electrical communication with the station ports (284,286) and with a node processor (77,459), the packet channel circuits (189,190) being operative to derive control information from a serial signal stream from a station port (286), and to combine control information with data information to form a serial signal stream for communication to a station port (284).

3. The system as recited in claim 2 wherein the information channel circuits are independently configurable, in response to dynamic control signals, to communicate a selected bandwidth of data information bewteen the station ports (284,286) and a selected node information highway (272,274).

4. The system as recited in claim 2 wherein the information highways (272,274) may operate at one of a plurality of speeds.

5. The system as recited in claim 2 wherein the station-to-highway section (244) includes programmable logic circuitry (387,389) adapted to serially interconnect the same sections of at least two station-to-highway sections to accommodate the information rate on the information highways (272,274) and at the station ports (284,286).

6. The system as recited in claim 2 wherein the highway-to-station sections (246) and the station-to-highway sections (244) comprise independently configurable control registers (365,317,409,411) that facilitate a plurality of communications paths between the information highways (272,274) and a station port (284,286).

7. The system as recited in claim 3 wherein at least one of the highway-to-station sections (346) comprises at least one information channel output register, (409,411) that contains information representative of the information highway from which the information is transferred, the time relative to the beginning of a message frame at which the information is transferred and the bandwidth of information transferred from the information highways (274) to a station port (284).

8. The system as recited in claim 7 wherein the information channel output register (409,411) may be dynamically reconfigured in response to control signals from node processors (77,459).

9. The system as recited in claim 3 wherein at least one of the station-to-highway sections (244) comprises at least one information channel input register (377,365) which contains information representative of the bandwidth of information transferred to the information highways (272) from a station port (286).

10. The system as recited in claim 9 wherein the information channel input register (377,365) may be dynamically configured in response to control signals from node processors (77,459).

11. The system as recited in claim 2 wherein the microtelephone controller is operative to communicate a time multiplexed signal stream having a packet switched portion and a circuit switched portion to the station port (286) and wherein the microtelephone controller further comprises:

a system interface (621) being operative to demultiplex a serial signal stream from the station port (284) into control and data information, and to multiplex control and data information into a serial signal stream for communication to the station port (286);

a clear channel serial rate conversion logic (624) for translating the information rate of data from the system interface to a rate compatible with the operation of local device (614), and for translating the rate of data from a local device (614) to a rate compatible with the operation of system interface (621);

asynchronous, synchronous, and terminal rate logic (625) operative to format the data from the local device in a message segment for transmission to the system interface (621), and for deriving data from received message segments; and

packet channel logic (622) for communicating control information between the system interface (621) and a microprocessor interface (623), and for generating monitoring signals responsive to the content of the control information.

12. The system as recited in claim 11 further including:

a voice interface (626) for communicating voice data between the audio device (613) and the system interface (621).

13. The system as recited in claim 11 wherein the system interface (621) comprises a system interface multiplexer (712) operative to combine control signals from an external processor (612), voice data from an an external audio device (613) and machine data from an external data device (614) and to transmit a combined signal in a serial signal stream to the station port (286), the interface (621) further including decoder (702) adapted to receive a serial signal stream from the station port (284) and to separate a control signal portion of the receive signal stream.

14. The system as recited in claim 11 wherein the data portion of the message segment transmitted to the station port (286) includes a variable number of valid message bits, the number of message bits being determined in response to the data rate of the device (614).

15. The system as recited in claim 11 wherein the data portion of the message segment received from station port (284) includes a variable number of valid data bits, the number of valid bits being determined in response to the data rate of the device (614).