Power over Ethernet-prioritized active splitter

• US 7,081,827 B2
• Filed: 04/05/2004
• Issued: 07/25/2006
• Est. Priority Date: 04/05/2004
• Status: Active Grant

• Current Assignee: Ademco Inc. (Resideo Technologies, Inc.)
• Original Assignee: Honeywell International Inc.
• Inventors: Addy, Kenneth L.
• Primary Examiner(s): Pope, Daryl C
• Application Number:
  US10/818,414
• Publication Number:
  US 20050229016A1
• Time in Patent Office: 841 Days
• Field of Search: 340/693.2, 340/506, 340/507, 340/509, 340/510, 340/693.1, 340/693.3, 340/693.4, 714/14, 307/38, 307/66, 700/293, 713/300
• US Class Current: 340/693.2
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24

Abstract

A POE (power over Ethernet)-prioritized active splitter is disclosed for a prioritized network having different priorities such as a network security system that uses an intelligent POE power supply with a prioritized back-up response, allowing a lower cost UPS (uninterruptible power supply) system to be used, and also providing a longer back-up time period by the UPS system for more critical components of the security system. A simple embodiment operates with only two priority levels, a high priority level for more critical components of the, such as the cable modem, the system router, fire alarm devices, local warning devices and the alarm communicator, while less critical components are supplied with electrical power at the low priority level. In the event of a power outage or disconnection, the critical high priority components remain connected to the Ethernet network to be supplied with electrical power by the UPS system and also to communicate over the twisted wire pairs of the Ethernet network.

Claims

1. A network for providing both data transmission and electrical power to hardware devices connected over the network, comprising:

a plurality of network hardware devices connected over the network, wherein the network provides both data transmission and electrical power from a main electrical power supply to the plurality of network hardware devices, the network hardware devices comprising high priority network devices that are more critical devices of the network and low priority network devices that are less critical devices of the network;

an uninterruptible power supply (UPS) coupled to the network to supply electrical power over the network to the network hardware devices in the event of a failure of the main electrical power supply;

at least one prioritized active splitter coupled between the network and at least one low priority network device, the at least one prioritized active splitter providing electrical power from the UPS over the network to the at least one low priority network device with a low priority level and disconnecting the at least one low priority network device from receiving electrical power from the network in the event of a failure of the main electrical power supply, to reduce the power load on the UPS, with the high priority network devices remaining connected to receive electrical power from the network.

2. The network of claim 1, including at least one prioritized active splitter coupled between the network and a plurality of low priority network devices and providing electrical power from the UPS over the network to the plurality of low priority network devices with a low priority level and disconnecting the plurality of low priority network devices from receiving electrical power from the network in the event of a failure of the main electrical power supply, to reduce the power load on the UPS.

3. The network of claim 1, in a security system wherein the high priority network devices include a cable modem, a system router, fire alarm devices, local warning devices and an alarm communicator which are supplied with electrical power at the high priority level.

4. The network of claim 1, in a security system wherein the low priority network devices include HVAC (heating, ventilation, air conditioning) home comfort devices which are supplied with electrical power at the low priority level.

5. The network of claim 1, wherein the network comprises an Ethernet network including twisted wire pairs.

6. The network of claim 5, where in the event of a failure of the main electrical power supply, connected high priority devices communicate over the Ethernet network with a non-Ethernet reliant communication protocol.

7. The network of claim 1, wherein the network hardware devices also comprise mid priority network devices, and the at least one prioritized active splitter providing electrical power from the UPS over the network to the at least one mid priority network device with a mid priority level and disconnecting the at least one mid priority network device from receiving electrical power from the network, to reduce the power load on the UPS.

8. The network of claim 7, where in the event of a power outage or disconnection, the low priority devices are disconnected from the UPS system and from data communications over the network, and the high priority devices and mid priority devices remain connected to the network to be supplied with electrical power and data communications over the network, and in the event the power outage or disconnection lasts for a given duration of time, the mid priority devices are also disconnected from the UPS system and from data communications over the network.

9. The network of claim 7, in a security system wherein the high priority devices comprise components of a fire alarm system, and the mid priority devices comprise security components of the security system including intrusion detectors.

10. The network of claim 1, wherein the plurality of network hardware devices include a system router, and when the system router becomes disconnected from the network or inoperative, the network hardware devices still connected to the network communicate messages over the network with a fall-back, simple alternative communication protocol.

11. A method of supplying prioritized power over a network providing both data transmission and electrical power to hardware devices connected over the network, comprising:

providing both data transmission and electrical power from a main electrical power supply to a plurality of network hardware devices connected over the network, wherein the network hardware devices comprising high priority network devices that are more critical devices of the network and low priority network devices that are less critical devices of the network;

coupling an uninterruptible power supply (UPS) to the network to supply electrical power over the network to the network hardware devices in the event of a failure of the main electrical power supply;

coupling at least one prioritized active splitter between the network and at least one low priority network device, the at least one prioritized active splitter providing electrical power from the UPS over the network to the at least one low priority network device with a low priority level and disconnecting the at least one low priority network device from receiving electrical power from the network in the event of a failure of the main electrical power supply, to reduce the power load on the UPS, with the high priority network devices remaining connected to receive electrical power from the network.

12. The method of claim 11, including coupling at least one prioritized active splitter between the network and a plurality of low priority network devices and providing electrical power from the UPS over the network to the plurality of low priority network devices with a low priority level and disconnecting the plurality of low priority network devices from receiving electrical power from the network in the event of a failure of the main electrical power supply, to reduce the power load on the UPS.

13. The method of claim 11, including coupling high priority network devices to the network in a security system that includes a cable modem, a system router, fire alarm devices, local warning devices and an alarm communicator, which are supplied with electrical power at the high priority level.

14. The method of claim 11, including coupling low priority network devices to the network in a security system that includes HVAC (heating, ventilation, air conditioning) home comfort devices, which are supplied with electrical power at the low priority level.

15. The method of claim 11, including coupling the network as an Ethernet network including twisted wire pairs.

16. The method of claim 15, where in the event of a failure of the main electrical power supply, connected high priority devices communicating over the Ethernet network with a non-Ethernet reliant communication protocol.

17. The method of claim 11, including coupling mid priority network devices to the network, and the at least one prioritized active splitter providing electrical power from the UPS over the network to the at least one mid priority network device with a mid priority level and disconnecting the at least one mid priority network device from receiving electrical power from the network, to reduce the power load on the UPS.

18. The method of claim 17, where in the event of a power outage or disconnection, disconnecting the low priority devices from the UPS system and from data communications over the network, while leaving the high priority devices and mid priority devices connected to the network to be supplied with electrical power and data communications over the network, and in the event the power outage or disconnection lasts for a given duration of time, also disconnecting the mid priority devices from the UPS system and from data communications over the network.

19. The method of claim 17, including connecting to the network high priority devices in a security system comprising components of a fire alarm system and mid priority devices comprising security components of the security system including intrusion detectors.

20. The method of claim 11, including connecting to the network a system router, and when the system router becomes disconnected from the network or inoperative, the network hardware devices still connected to the network communicating messages over the network with a fall-back, simple alternative communication protocol.