Method and apparatus for providing a multiple-ring token ring hub expansion

• US 6,035,340 A
• Filed: 03/19/1997
• Issued: 03/07/2000
• Est. Priority Date: 03/19/1997
• Status: Expired due to Fees

• Current Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Original Assignee: Nortel Networks Corporation
• Inventors: Fischer, Keith, Selby, Corey, Smith, Kevin G.
• Primary Examiner(s): Maung, Zarni
• Assistant Examiner(s): Cardone, Jason D.
• Application Number:
  US08/820,568
• Time in Patent Office: 1,084 Days
• Field of Search: 395/200.79, 395/200.81, 709/249, 709/251, 709/250, 370/463, 370/420, 370/489, 370/351, 370/353, 341/110, 341/126
• US Class Current: 709/249
• CPC Class Codes: G06F 13/4022 using switching circuits, e.g. switching matrix, connection or expansion network G06F13/4009 takes precedence
• CPC Class Codes: H04L 12/433 with asynchronous transmission, e.g. token ring, register insertion
• CPC Class Codes: H04L 12/4637 Interconnected ring systems

Abstract

A method and apparatus for expanding multiple token rings by interconnecting multiple multi-ring hubs. The computer networking hubs of the present invention are operable to support multiple token ring networks. In addition, the networking hubs of the present invention include a cable interface configured to interconnect the multiple token ring networks to a single cable interconnected with a separate hub, which is also configured to support multiple token rings. As a result, multiple token rings are able to be expanded across multiple networking hubs.

In one embodiment, the networking hubs of the present invention are further operable to receive signals from remote nodes via a first signal mode. The signals are converted to a second signal mode to be transmitted internally. To transmit the signals to a separate hub, the signals are re-converted to the first signal mode and transmitted to a separate networking hub via the first signal mode. Transmitting between the separate hubs via the first signal mode helps to preserve the signal integrity and decrease the cross-talk between the wires of the cable interconnecting the hubs.

Claims

1. A first networking hub operable to provide a common termination point for multiple nodes, the first networking hub comprising:

a first cable interface operable to transmit signals corresponding to multiple separate local area networks (LANs) to a second networking hub, the first and second networking hubs both operable to support multiple separate LANs, the first cable interface is operable to interconnect each of the separate LANs to a separate wire within a single cable to be interconnected with the second networking hub, the cable interface is further operable to transmit the signals in an analog format simultaneously to the second networking hub.

2. The first networking hub of claim 1, wherein the multiple separate LANs are token ring networks.

3. The first networking hub of claim 1, wherein the first cable interface consist of a single cable connector.

4. The first networking hub of claim 3, wherein the first networking hub includes a set of second connectors operable to receive signals from a first set of nodes, in a first signal mode;

the first networking hub operable to transmit the signals internal to the first networking hub via a second signal mode; and

the cable interface operable to convert the signals from the second signal mode to the first signal mode and transmit the signals to the second networking hub via the first signal mode.

5. The first networking hub of claim 1 further comprises a switching system product.

6. The first networking hub of claim 1 further comprises a transmission system product.

7. A method of interconnecting separate networks, the method comprising:

interconnecting a first networking hub with a separate second networking hub, the first networking hub and the second networking hub both operable to support a first local area network (LAN) and a second LAN, the first and second LANs being separate; and

transmitting signals from the first networking hub to the second networking hub, the signals corresponding to the first and second LANs, each of the separate LAN signals transmitted to the second networking hub via a separate wire within a signal cable, the separate LAN signals transmitted simultaneously to the second networking hub via an analog mode.

8. The method of claim 7, wherein the first and second LANs are token ring networks.

9. The method of claim 7, wherein the transmitting of the signals includes transmitting the signals from the first networking hub to the second networking hub via a first single connector.

10. The method of claim 9, wherein the first networking hub includes a set of second connectors operable to receive signals from a first set of nodes, in a first signal mode, and the first networking hub operable to transmits the signals internal to the first networking hub via a second signal mode;

and the step of transmitting the signals further includes transmitting the signals from the first hub to the second hub via the first signal mode.

11. The method of claim 7, wherein the first networking hub comprises a switching system product.

12. The method of claim 7, wherein the first networking hub comprises a transmission system product.

13. A first networking hub operable to provide a common termination point for multiple nodes, the first networking hub comprising:

multiple separate local area networks (LANs); and

a first cable interface interconnected to the multiple LANs, the first cable interconnected to a second networking hub, the cable configured to transmit the multiple LANs between the first and second networking hubs, the cable interface is configured to interconnect each of the separate LANs to a separate wire within a single cable to be interconnected with the second networking hub, the cable interface further configured to transmit the signals simultaneously to the second networking hub via an analog mode.

14. The first networking hub of claim 13, wherein the first networking hub is operable to receive signals from a first set of nodes in a first signal mode, the first networking hub is operable to convert the signals to a second signal mode to transmit the signals internal to the first networking hub, and the first networking hub is further operable to convert the signals from the second signal mode to the first signal mode and transmit the signals to the second networking hub via the first signal mode.

15. The first networking hub of claim 14 further comprises a switching system product.

16. The first networking hub of claim 14 further comprises a transmissions system product.