Apparatus and method for identifying, based on an alternating pattern, a port to which a cable is connected

• US 8,934,340 B1
• Filed: 07/18/2013
• Issued: 01/13/2015
• Est. Priority Date: 11/12/2007
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Inventors: Mater, Olaf, Schmalz, Joachim
• Primary Examiner(s): Phan, Tri H
• Application Number:
  US13/945,224
• Time in Patent Office: 544 Days
• Field of Search: 370229-240, 370241-258, 370272-297, 709208-209, 709217-229, 709248-250
• US Class Current: 370/230
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04L 49/20 Support for services
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission

Abstract

A switch includes a connector, a port, and an indicator. The connector is configured to connect via a cable to a computer. The port is attached to the connector. While the connector is connected to the computer via the cable, the port is configured to: transmit a command signal from the switch to the computer via the cable, wherein the command signal requests identification of the port; and detect a response to the command signal as received from the computer. The indicator is connected to the port. The indicator is configured to identify the port based on an alternating pattern of the response to the command signal.

Claims

1. A switch comprising:

a first connector configured to connect via a cable to a computer;

a first port attached to the first connector, wherein, while the first connector is connected to the computer via the cable, the first port is configured to

transmit a first command signal from the switch to the computer via the cable, wherein the first command signal requests identification of the first port, and

detect a first response to the first command signal as received from the computer; and

a first indicator connected to the first port, wherein the first indicator is configured to identify the first port based on an alternating pattern of the first response to the first command signal.

2. The switch of claim 1, wherein:

the alternating pattern of the first response to the first command signal repeatedly transitions between a plurality of states; and

the first indicator is configured to indicate the alternating pattern.

3. The switch of claim 1, wherein:

the first port is configured to detect a communication link, provided via the cable, alternating between a first state and a second state;

the first state refers to the communication link being active;

the second state refers to the communication link being inactive; and

the communication link alternating between the first state and the second state is the first response to the first command signal.

4. The switch of claim 1, wherein the first port is configured to, in detecting the first response to the command signal, detect a change in a speed of a communication link provided via the cable.

5. The switch of claim 1, wherein:

the first port is configured to detect a communication link, provided via the cable, alternating between operating in a full duplex mode and a half duplex mode; and

the alternating of the communication link between operating in the full duplex mode and the half duplex mode is the first response to the command signal.

6. The switch of claim 1, wherein:

the first response to the command signal repeatedly changes between a first state and a second state; and

periods between successive states of the first response to the command signal have a same predetermined length.

7. The switch of claim 1, wherein the first indicator comprises a plurality of light emitting diodes.

8. The switch of claim 1, wherein the first indicator is configured to provide an audible indication of the first port or a visual indication of the first port.

9. The switch of claim 1, wherein the indicator:

is configured to display the alternating pattern while identifying the first port; and

ceases to display the alternating pattern while not identifying the first port.

10. The switch of claim 1, further comprising:

a second connector configured to connect via the cable to the computer;

a second port attached to the second connector, wherein, while the second connector is connected to the computer via the cable, the second port is configured to

transmit a second command signal from the switch to the computer via the cable, wherein the second command signal requests identification of the second port, and

detect a second response to the second command signal as received from the computer; and

a second indicator connected to the second port, wherein the second indicator is configured to identify the second port based on an alternating pattern of the second response to the second command signal.

11. A method comprising:

connecting, via a first connector, a switch to a computer via a cable;

while the first connector is connected to the computer via the cable,

transmitting a first command signal from a first port of the switch to the computer via the cable, wherein the first port is attached to the first connector, and wherein the first command signal requests identification of the first port, and

detecting a first response to the first command signal as received from the computer; and

identifying the first port via a first indicator and based on an alternating pattern of the first response to the first command signal, wherein the first indicator is connected to the first port.

12. The method of claim 11, wherein:

the alternating pattern of the first response to the first command signal repeatedly transitions between a plurality of states; and

the first indicator is configured to indicate the alternating pattern.

13. The method of claim 11, further comprising, at the first port, detecting a communication link alternating between a first state and a second state, wherein:

the communication link is provided via the cable;

the first state refers to the communication link being active;

the second state refers to the communication link being inactive; and

the communication link alternating between the first state and the second state is the first response to the first command signal.

14. The method of claim 11, wherein the detecting of the first response to the command signal comprises detecting a change in a speed of a communication link provided via the cable.

15. The method of claim 11, wherein the detecting of the first response to the command signal comprises detecting a communication link, provided via the cable, alternating between operating in a full duplex mode and a half duplex mode.

16. The method of claim 11, wherein:

the first response to the command signal repeatedly changes between a first state and a second state; and

periods between successive states of the first response to the command signal have a same predetermined length.

17. The method of claim 11, further comprising indicating the first response via a plurality of light emitting diodes of the first indicator.

18. The method of claim 11, further comprising generating:

an audible indication of the identification of the first port via the first indicator;

or

a visual indication of the identification of the first port via the first indicator.

19. The method of claim 11, further comprising:

displaying the alternating pattern while identifying the first port; and

ceasing to display the alternating pattern while not identifying the first port.

20. The method of claim 11, further comprising:

connecting, via a second connector, the switch to the computer via the cable;

while the second connector is connected to the computer via the cable,

transmitting a second command signal from a second port of the switch to the computer via the cable, wherein the second port is attached to the second connector, wherein the second command signal requests identification of the second port, and

detecting a second response to the second command signal as received from the computer; and

identifying the second port via a second indicator and based on an alternating pattern of the second response to the second command signal, wherein the second indicator is connected to the second port.