1. A Power-over-Ethernet (PoE) powered device (PD) analysis system, comprising:
an Ethernet interface, including
a first physical layer (PHY) chip capable of providing a signal pulse,
a second physical layer (PHY) chip coupled to the PD,
a transmit line coupling the first PHY chip to the second PHY chip, and
a receive line coupling the second PHY chip to the first PHY chip; and
a pulse transformer, coupled to the first PHY chip, capable of relaying the signal pulse provided by the first PHY chip to the PD via the transmit line and second PHY chip,
wherein the first PHY chip is capable of analyzing characteristics of one or more return pulse signals returned to the first PHY chip along the Ethernet interface to determine attributes of the PD.
2. The system of claim 1, wherein the one or more return pulse signals include a reflected pulse returned to the first PHY chip along the transmit line.
3. The system of claim 1, wherein the one or more return pulse signals include a return pulse returned to the first PHY chip along the receive line.
4. The system of claim 1, wherein the first PHY chip comprises:
a transceiver coupled to the pulse transformer;
a transmit transformer having one side coupled to the transceiver and another side coupled to the pulse transformer and the transmit line; and
a receive transformer having one side coupled to the transceiver and another side coupled to the receive line.
5. The system of claim 1, wherein the second PHY chip comprises:
a transceiver;
a transmit transformer having one side coupled to the transceiver and another side coupled to the transmit line and the PD; and
a receive transformer having one side coupled to the transceiver and another side coupled to the receive line and the PD.
6. The system of claim 1, wherein the signal pulse is a time domain reflectometry (TDR) pulse.
7. The system of claim 1, wherein the Ethernet interface is one of a 100Base-T interface and a 1000Base-T interface.
8. The system of claim 1, wherein the characteristics of the one or more return pulse signals include at least one of:
voltage characteristics; and
frequency characteristics.
9. The system of claim 1, wherein the characteristics of the one or more return pulse signals include at least one of:
polarity;
intensity; and
amplitude.
10. The system of claim 1, wherein the attributes of the PD include at least one of:
device validity;
power classification;
AC disconnect information;
short circuit detection;
current measurement;
overload conditions; and
inrush conditions.
11. The system of claim 1, further comprising a voltage source coupled to the Ethernet interface that supplies power to the PD under direction of the first PHY chip based on the determined attributes of the PD.
12. The system of claim 11, further comprising opto-isolator circuitry that controls the supply of power to the PD under direction of the first PHY chip.
13. The system of claim 12, wherein the first PHY chip receives direction from an external source regarding the supply of power to the PD.
14. The system of claim 1, wherein the first PHY chip includes logic that analyzes the one or more return pulse signals.
15. The system of claim 1, wherein the first PHY chip includes an analog-to-digital converter to analyze the one or more return pulse signals.
16. The system of claim 1, further comprising:
a capacitance coupled to a side of the pulse transformer opposite the first PHY chip that acts to block direct current in prevention of a short circuit.
17. The system of claim 1, wherein the PD device is a legacy device.
18. A method of analyzing a powered device (PD), the method comprising:
transmitting a signal pulse to the PD;
receiving one or more return pulse signals from the PD;
analyzing characteristics of the one or more return pulse signals; and
determining attributes of the PD based on the characteristics of the one or more return pulse signals.
19. The method of claim 18, wherein the one or more return pulse signals include a reflected pulse.
20. The method of claim 18, wherein the one or more return pulse signals include a return pulse.
21. The method of claim 18, wherein the signal pulse is a time domain reflectometry (TDR) pulse.
22. The method of claim 18, wherein the characteristics of the one or more return pulse signals include at least one of:
voltage characteristics; and
frequency characteristics.
23. The method of claim 18, wherein the characteristics of the one or more return pulse signals include at least one of:
polarity;
intensity; and
amplitude.
24. The method of claim 18, wherein the attributes of the PD include at least one of:
device validity;
power classification;
AC disconnect information;
short circuit detection;
current measurement;
overload conditions; and
inrush conditions.
25. The method of claim 24, further comprising:
supplying power to the PD based on the device validity and the power classification.
26. A method of supplying power to a powered device (PD), the method comprising:
transmitting a signal pulse to the PD;
receiving one or more return pulse signals from the PD;
analyzing characteristics of the one or more return pulse signals;
determining validity and power classification of the PD based on the characteristics of the one or more return pulse signals; and
supplying power to the PD based on the validity and power classification.
27. The method of claim 26, wherein the signal pulse is a time domain reflectometry (TDR) pulse.
28. The method of claim 26, wherein the characteristics of the one or more return pulse signals include at least one of:
voltage characteristics; and
frequency characteristics.
29. The method of claim 26, wherein the characteristics of the one or more return pulse signals include at least one of:
polarity;
intensity; and
amplitude.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A library apparatus comprising:
a housing having an opening;
a cell unit including a plurality of cells for storing a storage medium;
a drive unit for writing data into or reading data from the storage medium;
a medium transportation unit for transporting the storage medium between the cells and between each of the cells and the drive unit;
a cell unit driver for moving the cell unit in vertical direction; and
a controller for controlling the cell unit driver to move the cell unit through the opening to a position accessible by a medium transportation unit of another library apparatus stacked in vertical direction.
2. The library apparatus according to claim 1, wherein the opening is formed on the housing adjacent to other library apparatus stacked in vertical direction.
3. The library apparatus according to claim 1, wherein a retraction area of the cell unit is provided between an upper surface of the cell unit and an upper surface of the housing and between an lower surface of the cell unit and an lower surface of the housing.
4. The library apparatus according to claim 3, wherein, when a cell unit of a nearby other library apparatus stacked in vertical direction moves through the opening into a position accessible by the self medium transportation unit, the controller controls to retract a portion of the self cell unit into the retraction area.
5. The library apparatus according to claim 3, wherein the opening has a first opening and a second opening, wherein the controller controls to remove the storage medium from a cell unit of a first other library apparatus that moves through the first opening and controls to store the storage medium into a cell unit of a second other library apparatus that moves through the second opening.
6. A library system comprising:
a first library apparatus; and
a second apparatus being stacked in vertical direction of the first library apparatus,
the first library apparatus including
a first housing having a first opening,
a first cell unit including a plurality of cells for storing a storage medium,
a first drive unit for writing data into or reading data from the storage medium,
a first medium transportation unit for transporting the storage medium between the cells and between each of the cells and the first drive unit,
a first cell unit driver for moving the first cell unit in vertical direction, and
a first controller for transmitting a movement instruction to the second library apparatus, and for controlling the first cell unit driver to move the first cell unit through the first opening to a position accessible by the second apparatus upon receiving a notification of movement completion from the second library apparatus, and for notifying the second library apparatus of movement completion upon the movement of the first cell unit being completed,
the second library apparatus including
a second housing having a second opening positioned to match the first opening of the first library apparatus,
a second cell unit including a plurality of cells for storing a storage medium,
a second drive unit for writing data into or reading data from the storage medium,
a second medium transportation unit for transporting the storage medium between the cells and between each of the cells and the second drive unit,
a second cell unit driver for moving the second cell unit in vertical direction, and
a second controller for controlling the second cell unit driver to move the second cell unit to a retraction area provided in the second housing upon receiving the movement instruction from the first library apparatus, and for notifying the first library apparatus of the movement completion upon retraction movement being completed, and for removing the storage medium from the cell of the first cell unit upon receiving the notification of the movement completion from the first library apparatus.
7. The library system according to claim 6, further comprising a third library apparatus being stacked in vertical direction of the second library apparatus,
the third library apparatus including
a third housing having a third opening positioned to match the second opening of the second library apparatus,
a third cell unit including a plurality of cells for storing a storage medium,
a third drive unit for writing data into or reading data from the storage medium,
a third medium transportation unit for transporting the storage medium between the cells and between each of the cells and the third drive unit,
a third cell unit driver for moving the third cell unit in vertical direction, and
a third controller for controlling the third cell unit driver to move the third cell unit through the third opening to a position accessible by the second apparatus upon receiving a movement instruction from the second library apparatus, and for notifying the second library apparatus of movement completion upon movement of the third cell unit being completed, and for controlling the third cell unit driver to move the third cell unit through the third opening to a position accessible by the third medium transportation unit and removing the storage medium from the cell of the third cell unit upon receiving completion notification of storing processing from the second library apparatus, wherein,
the second controller controls the second cell unit driver to move the second cell unit to a retraction area provided in the second housing and transmits the movement instruction to the third library apparatus when the first controller controls the first cell unit driver to return the first cell unit through the first opening to a normal position, wherein the second controller stores the storage medium in the cell of the third cell unit upon receiving the notification of the movement completion from the third library apparatus and notifies the third library apparatus of the completion of the storing processing.
8. Method for transporting a storage medium of a library apparatus, the library apparatus including a housing having an opening, a cell unit including a plurality of cells for storing a storage medium, a drive unit for writing data into or reading data from the storage medium, a medium transportation unit for transporting the storage medium between the cells and between each of the cells and the drive unit, a cell unit driver for moving the cell unit in vertical direction, the method comprising:
storing the storage medium into a prescribed cell of the cell unit by the medium transportation unit; and
moving the cell unit through the opening to a position accessible by a medium transportation unit of another library apparatus stacked in vertical direction.