Common backplane for physical layer system and networking layer system

• US 7,161,930 B1
• Filed: 06/30/1999
• Issued: 01/09/2007
• Est. Priority Date: 06/30/1999
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Nguyen, Vu, Tang, Norman, Wang, Eugene T., Tran, Nang
• Primary Examiner(s): Pham; Chi
• Assistant Examiner(s): LY, ANH VU H
• Application Number:
  US09/346,110
• Time in Patent Office: 2,750 Days
• Field of Search: 370/905, 370/906, 370/907, 370/401, 370/402, 370/403, 370/404, 370/405, 370/463, 370/465, 370/466, 370/395.5, 370/216, 370/217, 370/218, 370/219, 370/220, 370/225, 370/226, 370/242, 370/243, 370/244
• US Class Current: 370/352
• CPC Class Codes: H04L 49/40 Constructional details, e.g. power supply, mechanical construction or backplane
• CPC Class Codes: H04L 49/405 Physical details, e.g. power supply, mechanical construction or backplane of ATM switches
• CPC Class Codes: H04L 49/606 Hybrid ATM switches, e.g. ATM&STM, ATM&Frame Relay or ATM&IP

Abstract

A backplane having a switch card interface and an adapter card interface where the switch card interface has input/outputs in an arrangement that functionally mate to a networking layer system switch card and a physical layer system switch card. The adapter card interface is coupled to the switch card interface. The adapter card interface has input/outputs in an arrangement that functionally mates to a networking layer system adapter card and a physical layer system adapter card. A method that involves forming a first and second backplane according to a manufacturing process, integrating the first backplane into a networking layer system switch, and integrating the second backplane into a physical layer system switch.

Claims

1. An apparatus, comprising:

a) a backplane, said backplane having a plurality of switch card interfaces and a plurality of adapter card interfaces;

b) each of said switch card interfaces having an arrangement of inputs and outputs to functionally mate to an ATM switch card and to functionally mate to a SONET switch card; and

c) each of said adapter card interfaces coupled to each of said switch card interfaces, each of said adapter card interfaces having an arrangement of inputs and outputs to functionally mate to an ATM adapter card and to functionally mate to a SONET adapter card.

2. The apparatus of claim 1 further comprising an ATM switch card mated with one of said switch card interfaces and a SONET switch card mated with another of said switch card interfaces.

3. The apparatus of claim 2 further comprising an ATM adapter card mated with one of said adapter card interfaces and a SONET adapter card mated with another of said adapter card interfaces.

4. The apparatus of claim 3 further comprising a hybrid SONET/ATM adapter card mated with one of said adapter card interfaces, each of said adapter card interfaces having an arrangement of inputs and outputs to functionally mate to said hybrid SONET/ATM adapter card.

5. The apparatus of claim 1 further comprising a first ATM switch card mated with one of said switch card interfaces, a redundant ATM switch card mated with another of said switch card interfaces and an ATM adapter card mated with one of said adapter card interfaces.

6. The apparatus of claim 5 wherein said coupling between said adapter card interfaces and said switch card interfaces further comprises a plurality of major links, one major link between each said adapter card and each said switch card, each of said major links further comprising a plurality of minor links, each of said minor links further comprising a real data minor link and a redundant minor link.

7. The apparatus of claim 1 further comprising a first SONET switch card mated with one of said switch card interfaces, a redundant SONET switch card mated with another of said switch card interfaces and a SONET adapter card mated with one of said adapter card interfaces.

8. The apparatus of claim 7 wherein said coupling between said adapter card interfaces and said switch card interfaces further comprises a plurality of major links, one major link between each said adapter card and each said switch card, a real data major link between said SONET adapter card and said first SONET switch card, a redundant major link between said SONET adapter card and said redundant SONET switch card.

9. The apparatus of claim 1 further comprising four said switch card interfaces and twelve said adapter card interfaces.

10. An apparatus, comprising:

a backplane designed to support different networking systems, said backplane having a plurality of switch card interfaces and a plurality of adapter card interfaces, each of said switch card interfaces having an arrangement of inputs and outputs that functionally mates to an ATM switch card and that functionally mates to a SONET switch card, each of said adapter card interfaces coupled to each of said switch card interfaces, each of said adapter card interfaces having an arrangement of inputs and outputs that functionally mates to an ATM adapter card and that functionally mates to a SONET adapter card, a first of said networking systems being an ATM system where ATM adapter cards are plugged into said adapter card interfaces and ATM switch cards are plugged into said switch card interfaces, a second of said networking systems being a SONET system where SONET adapter cards are plugged into said adapter card interfaces and SONET switch cards are plugged into said switch card interfaces.

11. The apparatus of claim 10 wherein said backplane further comprises a conductive trace between one of said adapter card interfaces and one of said switch card interfaces, said conductive trace able to transport data between said adapter card interface and said switch card interface if said first networking system is being implemented, said conductive trace able to transport data between said adapter card interface and said switch card interface if said second networking system is being implemented.

12. The apparatus of claim 11 wherein said backplane further comprises a plurality of conductive traces between one of said adapter card interfaces and one of said switch card interfaces, each of said conductive traces able to transport data between said adapter card interface and said switch card interface if said first networking system is being implemented, each of said conductive traces able to transport data between said adapter card interface and said switch card interface if said first networking system is being implemented.

13. The apparatus of claim 11 wherein each adapter card interface is coupled to each switch card interface by a separate conducting trace that connects each one of said adapter card interfaces to each one of said switch card interfaces, each conductive trace able to transport data between its adapter card interface and its switch card interface if said first networking system is being implemented, each conductive trace able to transport data between its adapter card interface and its switch card interface if said second networking system is being implemented.

14. The apparatus of claim 13 wherein each adapter card interface is coupled to each switch card interface by separate pluralities of conducting traces that connect each one of said adapter card interfaces to each one of said switch card interfaces, each plurality of conductive traces able to transport data between its adapter card interface and its switch card interface if said first networking system is being implemented, each plurality of conductive traces able to transport data between its adapter card interface and its switch card interface if said second networking system is being implemented.

15. The apparatus of claim 14 wherein each plurality of conducting traces has a redundant conducting trace to transport data to its corresponding switch card interface upon the failure of a switch card that is plugged into a switch card interface other than its corresponding switch card interface.

16. The apparatus of claim 10 wherein said backplane'"'"'s design can support three networking systems, a third of said three networking systems being a hybrid ATM/SONET system having at least one ATM adapter card plugged into a first adapter card interface and at least one SONET adapter card plugged into a second adapter card interface, said hybrid ATM/SONET system having at least one ATM switch card plugged into a first switch card interface and at least one SONET switch card plugged into a second switch card interface.

17. The apparatus of claim 16 wherein a hybrid ATM/SONET adapter card may also be plugged into:

1) said first adapter card interface in place of said ATM adapter card;

or,

     2) said second adapter card interface in place of said SONET adapter card;

or,

     3) a third adapter card interface.

18. The apparatus of claim 10 wherein said backplane further comprises a processor card interface, said processor card interface coupled to said switch card interfaces and said adapter card interfaces.

19. The apparatus of claim 18 wherein said processor card interface is said coupled to said switch and adapter card interfaces with a bus.

20. The apparatus of claim 18 wherein said processor card interface is said coupled to said switch and adapter card interface with a clock trace.

21. The apparatus of claim 20 wherein a processor card that plugs into said processor card interface comprises system clocking circuitry.

22. An apparatus, comprising:

a backplane for supporting different networking systems, said backplane having means for making electrical contact with a switch card, said backplane having means for making electrical contact with an adapter card, said means for making electrical contact with a switch card further comprising functional mating means that functionally mate to an ATM switch card and that functionally mate to a SONET switch card, said means for making electrical contact with an adapter card further comprising functional mating means that functionally mate to an ATM adapter card and that functionally mate to a SONET adapter card, a first of said networking systems having an ATM adapter card that is functionally mated with said means for making electrical contact with an adapter card and an ATM switch card that is functionally mated with said means for making electrical contact with a switch card, a second of said networking systems having a SONET adapter card that is functionally mated with said means for making electrical contact with an adapter card and an SONET switch card that is functionally mated with said means for making electrical contact with a switch card.

23. The apparatus of claim 22 wherein said backplane further comprises means for transporting data between said means for making electrical contact with a switch card and said means for making electrical contact with an adapter card.

24. The apparatus of claim 22 wherein said backplane further comprising means for transporting data to a second switch card if a first switch card fails.

25. The apparatus of claim 22 wherein said backplane is designed to support three networking systems, a third of said three networking systems being a hybrid ATM/SONET system having at least one ATM adapter card functionally mated with a first instance of said means for making electrical contact with said switch card and a SONET adapter card functionally mated with a second instance of said means for making electrical contact with said switch card.

26. The apparatus of claims 25 wherein said third networking system is to have at least one ATM switch card functionally mated with a first instance of said means for making electrical contact with a switch card and is to have at least one SONET switch card functionally mated with a second instance of said means for making electrical contact with a switch card.

27. The apparatus of claim 25 wherein said backplane further comprises means for functionally mating with a processor card.