Switch-state information aggregation
One switch-state aggregation technique uses a digital-to-analog converter in combination with an analog-to-digital converter to aggregate the state of a plurality of switches. Another switch-state aggregation technique uses input/output lines of a processor to aggregate the state of a plurality of switches and to communicate data other than the state of the switches. These techniques can be used to aggregate information about whether a plug or other connector is inserted into the ports of a patch panel or other telecommunication or communication assembly, system, or device.
1. A system comprising:
a plurality of switches, each having a respective logical binary state; and
a programmable processor to monitor the state of the plurality of switches, the programmable processor comprising a plurality of input/output lines, wherein each of the plurality of switches is coupled to a respective input/output line;
wherein for each of the plurality of switches, the system is configured to develop a first logic state on the input/output line associated with that switch when that switch is in a first switch state;
wherein for each of the plurality of switches, the system is configured to develop a second logic state on the input/output line associated with that switch when that switch is in a second switch state; and
wherein the system is further configured to enable data other than the first and second switch states to be communicated over the input/output lines.
2. The system of claim 1 , further comprising a plurality of circuits, each of the circuits associated with a respective one of the plurality switches and the respective input/output line coupled to that switch;
wherein each circuit is configured to develop the first logic state on the input/output line of the switch associated with that circuit when that switch is in the first switch state;
wherein each circuit is configured to develop the second logic state on the input/output line of the switch associated with that circuit when that switch is in the second switch state; and
wherein each circuit is further configured to enable data other than the first and second switch states to be communicated over the associated input/output line.
3. The system of claim 2 , wherein each of the plurality of switches comprises a respective normally closed switch, wherein each circuit comprises a pull-up resistor coupled to a supply voltage and coupled to a first terminal of the normally closed switch, wherein a second terminal of said normally closed switch is coupled to ground, wherein the input/output line associated with that circuit is coupled to the first terminal of said normally closed switch.
4. The system of claim 2 , wherein each of the plurality of switches comprises a respective normally open switch, wherein each circuit comprises a pull-up resistor coupled to a supply voltage and a first terminal of the normally open switch, wherein a second terminal of the normally open switch is coupled to a weak pull-down resistor, wherein the weak pull-down resistor is also coupled to ground, wherein the input/output line associated with that circuit is coupled to the first terminal of said normally open switch.
5. The system of claim 1 , wherein the programmable processor is configured to monitor the state of the plurality of switches by reading the plurality of input/output lines.
6. The system of claim 1 , wherein the programmable processor is configured to communicate data other than the first and second switch states over each of the input/output lines.
7. The system of claim 6 , wherein for each of the input/output lines, the programmable processor is configured to read data from a memory device coupled to that input/output line.
8. The system of claim 7 , wherein each input/output line is coupled to a UNI/O bus interface of the memory device coupled to that input/output line.
9. The system of claim 1 , wherein each input/output line is a general purpose input/output line.
10. The system of claim 1 , wherein each of the input/output lines of the programmable processor is coupled to more than one of the plurality of switches.
11. The system of claim 10 , wherein each of the input/output lines of the programmable processor is coupled to more than one of the plurality of switches using one or more multiplexing devices.
12. The system of claim 11 , wherein the multiplexing device is configured to latch state changes of at least one of the plurality of switches.
13. The system of claim 11 , wherein the multiplexing device is configured to determine when a pair of rapid state changes occurs with respect to at least one of the plurality switches.
14. A patch panel comprising:
a plurality of a ports;
a plurality of switches, each of the plurality of switches being associated with a respective one of the plurality of ports, wherein each of the plurality of switches is configured to be in a first switch state when a cable is inserted into the respective port associated with that switch and in a second switch state when a cable is not inserted into the respective port associated with that switch; and
a programmable processor to monitor the state of the plurality of switches, the programmable processor comprising a plurality of input/output lines, wherein each of the plurality of switches is coupled to a respective input/output line; and
wherein for each of the plurality of switches, the patch panel is configured to develop a first logic state on the input/output line associated with that switch when that switch is in the first switch state;
wherein for each of the plurality of switches, the patch panel is configured to develop a second logic state on the input/output line associated with that switch when that switch is in the second switch state; and
wherein the patch panel is further configured to enable data other than the first and second switch states to be communicated over the input/output lines.
15. The patch panel of claim 14 , further comprising a plurality of circuits, each of the circuits associated with a respective one of the plurality switches and the respective input/output line coupled to that switch;
wherein each circuit is configured to develop the first logic state on the input/output line of the switch associated with that circuit when that switch is in the first switch state;
wherein each circuit is configured to develop the second logic state on the input/output line of the switch associated with that circuit when that switch is in the second switch state; and
wherein each circuit is further configured to enable data other than the first and second switch states to be communicated over the associated input/output line.
16. The patch panel of claim 15 , wherein each of the plurality of switches comprises a respective normally closed switch, wherein each circuit comprises a pull-up resistor coupled to a supply voltage and coupled to a first terminal of the normally closed switch, wherein a second terminal of said normally closed switch is coupled to ground, wherein the input/output line associated with that circuit is coupled to the first terminal of said normally closed switch.
17. The patch panel of claim 15 , wherein each of the plurality of switches comprises a respective normally open switch, wherein each circuit comprises a pull-up resistor coupled to a supply voltage and a first terminal of the normally open switch, wherein a second terminal of the normally open switch is coupled to a weak pull-down resistor, wherein the weak pull-down resistor is also coupled to ground, wherein the input/output line associated with that circuit is coupled to the first terminal of said normally open switch.
18. The patch panel of claim 14 , wherein the programmable processor is configured to read information stored on or in a cable that is inserted into the port using the input/output line associated with that port.
19. The patch panel of claim 14 , wherein the programmable processor is configured to read information stored on or in a cable that is inserted into the port using the input/output line associated with that port in response to a change in the state of the respective switch associated with that port.
20. The patch panel of claim 14 , wherein each cable comprises a copper cable or an optical fiber.
21. The patch panel of claim 14 , wherein each cable comprises a copper patch cord or an optical fiber patch cord.
22. The patch panel of claim 14 , wherein the programmable processor is configured to monitor the state of the plurality of switches by reading the plurality of input/output lines.
23. The patch panel of claim 14 , wherein the programmable processor is configured to communicate data other than the first and second switch states over each of the input/output lines.
24. The patch panel of claim 23 , wherein for each of the input/output lines, the programmable processor is configured to read data from a memory device coupled to that input/output line.
25. The patch panel of claim 24 , wherein each input/output line is coupled to a UNI/O bus interface of the memory device coupled to that input/output line.
26. The patch panel of claim 14 , wherein each input/output line is a general purpose input/output line.
27. The system of claim 14 , wherein each of the input/output lines of the programmable processor is coupled to more than one of the plurality of switches.
28. The patch panel of claim 27 , wherein each of the input/output lines of the programmable processor is coupled to more than one of the plurality of switches using one or more multiplexing devices.
29. The patch panel of claim 28 , wherein the multiplexing device is configured to latch state changes of at least one of the plurality of switches.
30. The patch panel of claim 28 , wherein the multiplexing device is configured to determine when a pair of rapid state changes occurs with respect to at least one of the plurality switches.