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WO1993010615A1 - Systeme servant a proteger et a faire redemarrer des ordinateurs et des peripheriques a des endroits eloignes accessibles par communication telephonique - Google Patents

Systeme servant a proteger et a faire redemarrer des ordinateurs et des peripheriques a des endroits eloignes accessibles par communication telephonique Download PDF

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Publication number
WO1993010615A1
WO1993010615A1 PCT/US1991/008543 US9108543W WO9310615A1 WO 1993010615 A1 WO1993010615 A1 WO 1993010615A1 US 9108543 W US9108543 W US 9108543W WO 9310615 A1 WO9310615 A1 WO 9310615A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
modem
computer
rcu
subscriber line
Prior art date
Application number
PCT/US1991/008543
Other languages
English (en)
Inventor
Carrell W. Ewing
Mark Jordan Bigler
Andrew J. Cleveland
Original Assignee
Server Technology, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Server Technology, Inc. filed Critical Server Technology, Inc.
Priority to PCT/US1991/008543 priority Critical patent/WO1993010615A1/fr
Publication of WO1993010615A1 publication Critical patent/WO1993010615A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G06F1/3209—Monitoring remote activity, e.g. over telephone lines or network connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • the invention relates generally to computers and more particularly to remote control methods and devices to protect computer systems from various threats and to remotely reset a system that has become hung.
  • One such device is a telephone activated power control unit marketed in the United States as POWER-ON by Server Technology (Santa Clara, CA) . It allows a PC, using a standard telephone line and modem, to power-on a remote PC. Using bundled communications software the PC can operate the remote PC, run its programs, transfer data files, and use a printer.
  • United States Patent 4,647,721 issued to Busam, et al., describes a telephone activated power controller having an electrical power inlet and a number of outlets for various appliances, such as a computer.
  • a detector senses a ring condition on a standard telephone line and goes off-hook while connecting inlet power to its outlets.
  • a remote control unit allows the computer to keep the power on after hang-up (on-hook) or manual power-off.
  • a status sensor can tell the computer if the device has been turned on manually or remotely.
  • An inhibit circuit can prevent the device from responding to a telephone ring or off-hook condition.
  • the controller also has surge protection on the power outlets.
  • a device called POWERKEY is being marketed for the Apple Macintosh PC. This device reportedly can turn a system on and off, and it can execute keyboard macros at present times, for applications such as unattended backups or telecommunications file transfers.
  • a "cdev" program enables daily, weekday, weekly, monthly, and unique events to be scheduled.
  • the Macintosh can be turned on with a phone call using a POWERKEY remote device.
  • Software such as TIMBUKTU REMOTE or CARBON COPY MAC can allow the computer to be operated from a remote location as if the operator were actually in front of the computer, and not one connected to it.
  • PHONEBOOT is sold by Cybex Corporation (Huntsville, Alabama) allows a user to boot computers, peripherals, and other appliances from a remote location using a telephone, while providing built-in password protection.
  • the device has six 120 VAC outlets, surge protection, a phone plug, a modem plug, and a power cord. It works with Hayes compatible modems and TOUCH TONE (DTMF) telephones.
  • DTMF TOUCH TONE
  • remote enable the device monitors an incoming phone line for a call. After eight rings, the call is answered and the caller is given a prompt tone and a three digit security code must be entered. The code can come in via TOUCH TONE phone or by modem. If the code is accepted, the power outlets are turned on. If a modem is attached, it must provide an answer back tone to the caller and establish a communications channel. Power is left on for 18 minutes after hanging up.
  • Yet another device is the TELESWITCH by EKD (Selden, NY) which uses a four digit security code, a local ring circuit for a modem after power-up, and automatic modem transfer to phone line after modem answers local ring. It is advertised to work with host/remote software such as pcANYWHERE (Dynamic Microprocessor Associates) .
  • the device allows a user to disconnect during a call to save on phone charges while leaving the computer on. A later call-back can shut the power down.
  • an embodiment of the present invention comprises an intelligent power module (IPM) , a desktop on/off switch, a serial and parallel adapter, and a computer-implemented process on a diskette.
  • the intelligent power module has an electrical power input and an output to supply power via a user activated manual switch or programmatically using computer instructions to a surge outlet strip or general office equipment. It further comprises control circuits which can interpret remote instructions to the IPM to control the flow of AC power to unattended office equipment.
  • the IPM can be remotely controlled by a user activated manual switch or by the computer itself.
  • Fig. 1 is a diagram of a first embodiment of a power management system according to the present invention
  • Fig. 2 is a diagram of a second embodiment of a power management system according to the present invention.
  • Fig. 3 is a diagram of a third embodiment of a power management system according to the present invention
  • Fig. 4 is a simplified schematic diagram of RCU IOC-
  • Fig. 5 is a schematic diagram of RCU 56
  • Fig. 6 is a schematic of a power control module that has a single control input and uses a triac for transfer relay control;
  • Fig. 7 is a schematic of a power control module that has a dual-input control and uses an SCR for transfer relay control;
  • Figs. 8(a) through 8(e) are mechanical elevations of a way to package a power control module.
  • Fig. 8(a) is a top view.
  • Fig. 8(b) is a left side view.
  • Fig. 8(c) is a right side view.
  • Figs. 8(d) and 8(e) are side views of opposite ends; and
  • a power management system 10 comprises an intelligent power module (IPM) 12 (shown plugged into a wall outlet) , a desktop on/off switch 14, a serial and parallel adapter 16 with a control cable 18, and a computer-implemented process on a diskette 20.
  • IPM 12 has an electrical power input and an output to supply power via a user activated manual switch or programmatically using computer instructions to a surge outlet strip or general office equipment.
  • the IPM 12 further comprises control circuits which can interpret remote instructions to the IPM 12 from computer 24 to control the flow of AC power to unattended office equipment.
  • the IPM can be remotely controlled by a user activated manual switch 22 or by a computer 24 itself. Appliances 26 and 28, along with computer 24, are powered by a plug strip 30 connected to IPM 12.
  • System 10 is able to turn the power off to plug strip 30 after running a job on computer 24 by sending an appropriate signal out adaptor 16 to IPM 12.
  • a power management system 50 comprises a remote power module (RPM) 52 (shown plugged into a wall outlet) , an external modem 54, a modem cable 56, a response control unit (RCU) 58, a computer- implemented process on a diskette 60.
  • RPM 52 has an electrical power input and an output to supply power via a user activated manual switch 62 or programmatically using computer instructions to a surge outlet strip 64 and general office equipment 66 and 68, and also a computer 70.
  • the RPM 52 further comprises control circuits which can interpret remote instructions to the RPM 52 to control the flow of AC power to unattended office equipment.
  • a power management system 80 comprises first through fourth remote power modules (RPMs) 81-84 (shown plugged into separate wall outlets) , an external modem 85, a modem cable 86, a response control unit (RCU) 88, a computer-implemented process on a diskette 90.
  • RPMs 81-84 each have an electrical power input and an output, and are similar to RPM 52 (Fig. 2) .
  • RCU 88 has eight RJ-11 jacks to receive standard modular cord plugs from the telephone line (Telco) , modem 85, and four RPMs 81-84, and two carrying RS-232 channels, one to modem 85 and one to computer 70.
  • RPMs 81-84 can be individually and independently controlled from RCU 88.
  • a simplified schematic for RCU 88 is shown in Fig. 4.
  • a pair of serial RS-232 interfaces 91 and 92 couple to modem 85 and computer 70, respectively, and are level shifted with RS-232 buffers, for example using Motorola MC145406 and MC145407 buffers.
  • the intelligence of RCU 88 is provide by an Intel 8032 ROM-less type microcontroller 93 and a firmware program 94 (not shown due to its nature) stored in a 27C256 EPROM 95.
  • a type 74C22106 addressable latch/data selector 96 provides bit control for modem command and status lines, such as RTS, DCD, etc.
  • Firmware program 94 is computer- implemented process that operates RCU 88 according the the function description below.
  • a type 74HCT373 octal buffer 97 provides the drive necessary from the data bus (port P00-PO7 of the 8032 microcontroller) to drive four switch status LEDs and, with the aid of a type 74LS05 open-collector inverter, drive four RJ-11 jacks PCM1- PCM4, e.g. coupled to RPMs 81-84.
  • the tip and ring from a Telco RJ-11 jack 98 are input to a CD22204E DTMF unit 99 which is clocked by a 3.58 MHz crystal.
  • a type TLP621-2 opto-isolator 100 is connected to tip and ring provide off-hook indication to the 8032 microcontroller.
  • a ring detection circuit 101 comprises a type TLP621-2 opto-isolator and a type TCM1520A ring detector. Circuit 101 provides ring indication to the 8032 microcontroller.
  • Tip and ring from the Telco RJ-11 jack 98 are simply passed through to the tip and ring of a RJ-11 jack 102, e.g. for connection to modem 85.
  • a non- volatile memory 103 is used to store user settings.
  • a set of four manual pushbutton switches 104 sensed by a computer-implemented process can be used to individually control from one to four power modules.
  • RCU 58 comprises an EPROM-based 8-bit CMOS microcontroller 110, preferably a Microchip
  • a ring detection circuit 114 comprises a type TLP621-2 opto-isolator and a type TCM1520A ring detector. Circuit 114 provides ring indication to the PIC16C54 microcontroller 110. Tip and ring from Telco RJ-11 jack 112 are simply passed through to the tip and ring of another RJ-11 jack 115, e.g. to couple to modem 54.
  • Port RAO is used to read the condition of a switch 116.
  • Ports RA1 and RA2 drive two status LEDs 117 and 118 via type 74LS05 open-collector inverters.
  • a single power controller module 119 is driven by port RA3 via another type 74LS05 open- collector inverter.
  • Syste 80 for example, requires the ability to intercept the RS-232 line between modem 85 and computer 70. Most signals from modem 85 are passed directly through RCU 88 without change, but at a minimum the RCU 88 must be able to freely use the XMT and receive lines to modem 85 without interference from computer 70. Interception of the data terminal ready (DTR) line is also preferred. As is support for sensing, as practical, CD, Rl, and DSR. Computer 70 should be able to interact with modem 85, as if the RCU 88 was not present.
  • Choices for RS- 232 DCE/DTE connectors male/female type assignment is open) can include, but are not limited to
  • DB-25 No "missing" pins/signals. Cables are readily available. The connectors would use up much of the available case end- plate real estate. Also, high cost; DE-9: All standard RS-232 pins/signals
  • Mini-DIN 9 Same signals as DE-9, but cables have to be custom manufactured (for both DCE and DTE devices); and Mini-DIN 8: One RS-232 signal has to be dropped (e.g., Rl, CD, or DSR) . Custom cables have to be made .
  • RCU 88 preferably has the ability to interact with a caller intelligently (either by RS-232 or by DTMF codes) , to require from the caller a password, device code, and command, at a minimum. This requirement is preferably satisfied by microprocessor control.
  • RCU 88 should generate an external control signal that can be used to control power to computer 70. As many as three additional (similar) external control signals (ports) are preferred. Each port should have an attendant "manual" switch and "true” LED indicator. These switches and LEDs can be microprocessor peripherals.
  • RCU 88 preferably allows a user to set a "password" code.
  • An eight position DIP switch can satisfy this requirement. As many as four option switches may also be required.
  • a status/heartbeat/system alive-and-well indicator is preferred. A single "status” LED would be sufficient.
  • a two-way power line interface is used, a standard telephone jack on the case should be coupled to the microprocessor. This also requires the user to set a house code for RCU 88. A four-pole DIP switch has enough bits to set a valid house code.
  • microcontroller 93 under control of firmware program 94, initializes, verifies its control program, makes false all external power controls, configures its RS-232 intercept in such a way that computer 70 has "control" of any attached modem 85 via interface 91, takes inventory of optional features, and, if all is well, starts flashing its status LED at a regular interval. If any faults are detected, firmware program 94 flash the status LED in a distinctive manner and indicates the failure type on the "power control" LEDs connected to latch 97.
  • firmware program 94 Under the assumption that power control for computer 70 might not be done through firmware program 94, the outbound DTR line from computer 70 is checked to determine if computer 70 is powered on, and has an active serial port. If DTR is true, and passive mode inhibit is not true, firmware program 94 will not query modem 85 and will not attempt to issue modem 85 commands to answer any incoming calls. Computer 70 to modem 85 link will be kept, and is firmware program 94 passive mode. Otherwise, firmware program 94 sets an RS-232 intercept control to allow direct communication with modem 85. After modem 85 communications have been established, firmware program 94 commands modem 85 to not auto ⁇ answer, and requests that modem 85 go on-hook. firmware program 94 then monitors the modem line to detect incoming calls, and it monitors the DTR line from the computer for activity. This is the active mode.
  • firmware program 94 In interactive, true, passive, and idle modes, firmware program 94 preferably always monitors the power control switches. If one of these switches should become true, firmware program 94 sets its corresponding control line and LED true. If an true switch goes false, firmware program 94 turns off the corresponding control line and LED. All switch actions are subject to debouncing, with a 0.25 second threshold.
  • firmware program 94 If, while in active mode, firmware program 94 senses that the serial port of computer 70 has come alive (e.g., DTR true), and a passive inhibit is not true, firmware program 94 releases control of modem 85 and set its RS-232 intercept to give computer 70 control of modem 85, and then goes into passive mode.
  • DTR true the serial port of computer 70 has come alive
  • firmware program 94 releases control of modem 85 and set its RS-232 intercept to give computer 70 control of modem 85, and then goes into passive mode.
  • firmware program 94 While if in passive mode firmware program 94 senses that the serial port of computer 70 is no longer true (DTR false) for a period of at least three seconds, or passive inhibit becomes true, firmware program 94 will take control of modem 85 and go into the active mode, in which modem 85 informs firmware program 94 that a ring has occurred, firmware program 94 will start its command mode. In command mode, firmware program 94 commands modem 85 to take the phone line off-hook. If DTMF support is enabled, modem 85 will not be required to establish a carrier. Rather, firmware program 94 waits up to 30 seconds for a DTMF password to be received by DTMF device 99.
  • firmware program 94 has modem 85 return to the on-hook state via command on serial interface 91. If the password is valid, firmware program 94 waits up to 30 seconds for a line-code or command sequence. If DTMF support is not enabled, modem 85 will be required to establish a carrier, after which firmware program 94 stores a connection message from modem 85. It forwards the message to computer 70 later (when and if the caller asks to be put through to computer 70) . firmware program 94 then communicates via modem 85 directly with the caller (see below for exemplary scripts) to obtain a "password" code. Again, all communications are constrained by a 30 second no- response/hang-up timeout.
  • firmware program 94 requests a line-code/command sequence from the caller. Once firmware program 94 has a valid line-code/command sequence, and any preliminaries have been completed (e.g., power on/off), the sequence will be acknowledged. In the case of DTMF, a single pulse indicates a good sequence and a multiple pulse (with a pause between each pulse) indicates a failed sequence. If an error occurs after a valid password, the caller is given the chance to try again. With a valid line-code/command having been received, firmware program 94 executes the request.
  • firmware program 94 ties the modem's RS-232 lines to the lines on computer 70.
  • Firmware program 94 then goes into an idle mode. While in idle mode, ny action is based on the last true computer 70 oriented command received, firmware program 94 may wait for a call to complete, and then computer 70 power off immediately, or off after a preset number of seconds. In either case, it returns to active mode. Another possibility is that when the call completes, based on a prior command, firmware program 94 enters passive mode.
  • Passive mode can be inhibited by an option switch control. If passive mode is inhibited, computer 70 will only be connected to modem 85 after either a specific command from a caller or after a special "break" command sequence from computer 70 (see below) .
  • the passive mode inhibit switch is read by firmware program 94 dynamically, allowing a user to regain control of modem 85 at any time by changing the switch on firmware program 94.
  • Firmware and/or hardware means to allow computer 70 to communicate directly with firmware program 94 are needed.
  • Computer 70 should be able to get attention from firmware program 94 directly.
  • a break signal sent by computer 70 while modem 85 is "false" causes firmware program 94 to turn its attention solely to computer 70 and enter an interactive mode.
  • firmware program 94 will not process modem 85 information, firmware program 94 can determine that modem 85 is inactive in the following ways: when a CD line driver is provided, firmware program 94 can simply give computer 70 a direct line to firmware program 94 on a break signal. But
  • RS-232 line drivers may be in short supply. Additional MC145406 devices, for example, may be needed or discrete digital logic added to interface the CD signal on modem 85 to firmware program 94; when either the on-hook/off-hook means or its DTMF chip equivalent are included with firmware program 94, then firmware program 94 can use the current on-hook state to qualify a break signal; and if computer 70 is allowed to gain direct control of firmware program 94, when it is in active mode and its passive inhibit switch is true, then a break signal can be qualified by an internally monitored on/off-hook state.
  • a default (power-on) data rate is preferably predetermined in advance, e.g., 9600 bps .
  • the data rate should be changeable by computer 70 on request (using the data rate then in effect) .
  • firmware program 94 will return to its default setting whenever power is cycled. If a "fixed" data rate is an unreasonable constraint, other alternatives may be needed to solve to the problem of getting an initial communication between computer 70 to firmware program 94 started.
  • firmware program 94 will activate the power control line to computer 70 as soon as ring detect goes true , it is deactivated whenever the phone line stays on-hook continuously for at least 2 minutes. Any call received prior to the time-out will reset the logic.
  • firmware program 94 makes no attempt to communicate with the caller. In this mode, firmware program 94 is little more than a simple switch that is ring-activated and on-hook deactivated. No RS-232 connections are required for this mode.
  • the caller to computer 70 operator to modem 85 to firmware program 94 interactions fall into three types, remote caller interface, direct computer 70 to firmware program 94 interface, and firmware program 94 to modem 85 interface.
  • Caller starts a communications program which sets a valid data rate with 8N1 and dials an idle modem 85 with an attached RCU 88; 2) modem 85 sends "ring" message to RCU 88; 3) RCU 88 sends off-hook & answer command to modem 85;
  • modem 85 establishes carrier and send connect message to RCU 88;
  • RCU 88 interprets the connect message and sets it data rate accordingly
  • RCU 88 With no echo, but allowing for character deletion, RCU 88 inputs a password code, followed by a return. RCU 88 then verifies the password.
  • RCU 88 issues a modem 85 hang-up sequence by lowering DTR and checking for either on-hook or no carrier, if that fails RCU 88 tries pause, "+++", pause, and looks for "OK” from modem 85, then sends "ATHO" and again checks for either on-hook or no carrier. If that fails, it keeps trying.
  • RCU 88 sends the following message:
  • Line code (1-4, or 0 to hang-up) :
  • RCU 88 responds:
  • Command code (1-9, or 0 to hang-up) :
  • RCU 88 then returns to the "Line code” prompt. If at any time the caller chooses "0", RCU 88 hangs up as described above (for invalid password) .
  • Computer 70 user starts a communications program and sets the data line to 9600 8N1. ("8N1 represents a communications byte with eight data bits, no parity, and one stop bit . ) A user ascertains that modem 85 is not on-line (off-hook false, No CD) . The user then sends a "break" signal on the serial output from computer 70 and RCU 88 responds:
  • RCU 88 responds:
  • RCU 88 acts as if the user typed a "? N (the user can backspace) .
  • RCU 88 For "B” and return, RCU 88 responds:
  • RCU 88 responds:
  • RCU 88 responds: New data rate selected. Press “return " when your terminal is set at the new data rate . ⁇ Waiting for return at new data rate>
  • RCU 88 When the user enters a "return” at the new data rate, RCU 88 returns to the "Command" prompt.
  • RCU 88 For "H" and return, RCU 88 responds:
  • RCU 88 responds:
  • House code has been set .
  • RCU 88 then returns to the "Command" prompt.
  • RCU 88 For "M” and return, RCU 88 responds:
  • RCU 88 responds:
  • RCU 88 responds: When this message ends you will be connected to modem . To return to the "Command” prompt, send "Break” with modem Off -Line . End of Message.
  • RCU 88 connects the user's computer 70 "directly" to modem 85.
  • RCU 88 For "R” and return, RCU 88 responds:
  • RCU 88 responds:
  • RCU 88 responds:
  • RCU 88 disconnects from computer 70 and continues monitoring modem 85/Phone line.
  • RCU 88 For "X" and return, RCU 88 responds:
  • RCU 88 then returns to the command prompt.
  • Power Control Modules Fig. 6 represents a power control module 120 that has a single control input 122 and uses a triac 124 to control a transfer relay 126.
  • an opto-isolator 128 When input 122 receives a signal, an opto-isolator 128 will trigger triac 124 to turn-on, which also actives transfer relay 126 and an associated switch 130.
  • an LED 132 When power is switched through to the output of module 120, an LED 132 will be lit.
  • One power control module 120 can be used in system 50 to serve as RPM 52, or four in system 80 as RPMs 81-84. In Fig.
  • a 120 VAC power control module 140 comprises dual-input control lines 142 and 144, a fuse 146, four rectifiers 147-150 in a full-wave bridge, a transfer relay 152, a capacitor 154, an SCR 156, an opto-isolator 158, an on/off switch 160, and an LED 162.
  • module 140 is more complex than module 100, mainly because an SCR is used, instead of a triac.
  • Input lines 142 and 144 are diode isolated and effectively OR'ed at opto-isolator 158 such that when either one is active, SCR 156 will be triggered and relay 152 will be energized to close a switch 162.
  • Rectifiers 147-150 and capacitor form a filtered full- wave DC power supply for transfer relay 152.
  • Fuse 146 protects the input supply against shorts within module 140 or its load.
  • Power control module 140 can be used in system 10 to serve as ICM 12.
  • Figs. 8(a) through 8(e) show one way to package power control module 120 for commercial use.
  • Fig. 8(a) shows an on/off switch just below an LED.
  • Fig. 8(b) shows an RJ-11 jack for input control signals.
  • FIG. 8(c) shows a standard 120 VAC 3-wire grounded male power input plug.
  • Figs. 8(d) and 8(e) are side views of opposite ends, with Fig. 8(d) showing a standard 120 VAC 3-wire grounded female power output plug.
  • the power control module thus packaged, is suitable for plugging into a standard duplex outlet in a home or office and can be plugged in so that it will not cover the other plug in the duplex outlet.
  • Figs. 9(a) through 9(c) show the three major assemblies of power control module 120, for example, comprising a lower housing 202 (Fig. 9(a)), a circuit assembly 204 (Fig. 9(b)), and an upper housing 206 (Fig. 9(c) ) .
  • a pair of spade plugs 208 serve as line in and neutral power input terminals. Terminal 122, LED 132, and relay 126 are mounted to assembly 204. When assembled, plugs 208 protrude through lower housing 202 and form a trio with ground lug 210. And, LED 132 protrudes through upper housing 206.
  • a manual on/off switch 212 corresponds to that shown in Fig. 6 on the gate of triac 124.
  • a power output molding slips over a connector 216 and corresponds to the line out and neutral power output.
  • a single screw 218 is able to hold lower housing 202, circuit assembly 204, and an upper housing 206 together with the aid of interlocking lips on the upper and lower housings 206 and 202. This simple assembly can reduce manufacturing costs.
  • system 80 provides the ability to change how each of the attached power modules will turn on and off.
  • Several characteristics of the attached computers and peripherals should go in to the choices on how each power module is to behave. Table I summarizes exemplary choices in a typical four power module system. TABLE I
  • lines 1-4 correspond to four power modules (e.g., RPMs 81-84) connected to four appliances.
  • Line 1 controls a computer, such as computer 70.
  • the wake-up state can be either set to on or off. If on, passwords are required for access by a caller to RCU 88 or computer 70 functions. If off, passwords are not required.
  • Boot-time is a programmable delay that equals or exceeds the time the computer needs to cold-boot after Line 1 turns it on. For example, an incoming call can be answered and put on hold for a period equal to the boot-time. Then the call is passed through to modem 84 for answering by computer 70.
  • Some computer cold- boot times can exceed the time the telephone company will allow a phone to ring (typically four minutes) .
  • the boot-time helps deal with this situation.
  • the PC settle-time is the time a system needs to wind down before a new command to power-up can be entertained. In hard disk systems a few seconds are needed for the disks to stop spinning.
  • Table I only Line 1 has a time programmed in. The other lines do * not have appliances that need to settle before being restarted. The number of rings that come in before a line is activated can be entered as the power-on ring.
  • the example in Table I shows power will be turned on to the computer after the very first ring. This will give the computer the most time to boot.
  • More rings would be desirable if a user should be given a chance to answer the line first. It can also be a good idea to set this count as high as ten, in order to keep the computer from coming on with just any random call that may come in, telemarketing and computer hackers being what they are.
  • On-hook action is action that should occur after a caller has hung-up. In the case of a computer with a FAX board that has just received a message, the FAX board will need time to process the message after the system goes on-hook.
  • a delay parameter can be set for as long as five minutes. In another example, if a remote system and printer has received a long print- file, book the computer and printer will need time after going on-hook to complete the print job.
  • the user can also enter passive or sentry operation modes, the system (supervisor) and sentry level passwords, and the modem data rates to use.
  • Passive mode means the detection of a ring will power on the remote host system.
  • Sentry mode requires a password be sent and validated before a call will be passed on to the computer.
  • a time-lock function can be added to provide additional security. Similar in concept to time locks on bank vaults, a time-lock on system 80, for example, could prevent roaming hackers from randomly chancing on the system. A few users have been observed to be implementing the crudest of time-locks with simple timers meant to turn lamps on and off in a house at certain times to fool burglars into believing someone is home.
  • a time-lock function implemented with system 80 is programmable and accessible to a user on a calling computer or, e.g., computer 70.
  • distinctive dialing capability can also be implemented in RCU 88.
  • Many local phone companies are able to assign more than one number to a single subscriber line. Functioning like the old party-line, distinctive dialing is used on the single line to change the number and character of the rings to indicate which subscriber number is being called. For example, one long ring followed by a short could be the first number. Two longs for the second, etc.
  • RCU 88 in an alternative embodiment of the present invention, can be programmed to respond differently on the basis of distinctive dialing.
  • "heartbeat" detection can be implemented in RCU 88 to cold-boot a computer, such as computer 70, if it should fail to periodically signal RCU 88 that it is alive and functioning.
  • a mail-box function can be implemented to allow a caller to leave messages in a mailbox.
  • Alarm support preferably includes being able to detect alarm signals from the host system to then take appropriate action, such as a reboot, or place an alarm notice call.
  • a print saver function powers off printers, such as laserprinters which consume a lot of electricity, when not needed. Embedded strings can be useful to reawaken an RCU to gain access to a power control module.
  • Programmatic power control would allow a computer to send signals to control its own power and that of the peripherals attached to it. For example, many systems are left unattended at night broadcasting lists of FAX letters or running backups after-hours. Once an unattended computer has completed its jobs, it can signal itself through system 80, for example, to power down. This reduces power waste, a risk of unauthorized access, and a risk of electrical damage from lightning and voltage surges.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • General Engineering & Computer Science (AREA)
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  • Telephonic Communication Services (AREA)

Abstract

Selon un mode de réalisation, la présente invention comprend un module d'alimentation intelligent (IPM) (81-84), un commutateur marche/arrèt de table, un adaptateur en série et parallèle, et une opération appliquée par ordinateur, sur disquette (90). Le module d'alimentation intelligent (81-84) comprend une entrée de courant électrique et une sortie servant à fournir du courant par l'intermédiaire d'un commutateur manuel actionné par l'utilisateur, ou par programmation au moyen d'instructions d'ordinateur, à une barrette de sortie de surtension ou à du matériel de bureau en général (66, 68). Le module comprend en outre des circuits de commande (88) pouvant interpréter des instructions émises à distance à l'IPM afin de réguler le flux de courant alternatif vers du matériel de bureau (66, 68) laissé sans surveillance. L'IPM (81-84) peut être commandé à distance par un commutateur manuel actionné par l'utilisateur, ou par l'ordinateur lui-même (70).
PCT/US1991/008543 1991-11-15 1991-11-15 Systeme servant a proteger et a faire redemarrer des ordinateurs et des peripheriques a des endroits eloignes accessibles par communication telephonique WO1993010615A1 (fr)

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PCT/US1991/008543 WO1993010615A1 (fr) 1991-11-15 1991-11-15 Systeme servant a proteger et a faire redemarrer des ordinateurs et des peripheriques a des endroits eloignes accessibles par communication telephonique

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CH685656A5 (de) * 1994-03-07 1995-08-31 Martignoni Electronics Ag Einrichtung zum Empfang von Daten.
WO1995028785A1 (fr) * 1994-04-15 1995-10-26 Aegis Technologies, Inc. Controleur superviseur d'interface et procede de commande a distance d'un terminal
US5596628A (en) * 1994-02-09 1997-01-21 Klein; Jon Method and apparatus for initiating loading of software in a personal computer in response to an incoming signal
GB2339931A (en) * 1998-05-06 2000-02-09 Jim Delaney Microprocessor-based computer control unit
US6711613B1 (en) 1996-07-23 2004-03-23 Server Technology, Inc. Remote power control system
WO2004100008A1 (fr) 2003-05-09 2004-11-18 Samsung Electronics Co. Ltd. Ordinateur et systeme de commande a distance utilisant cet ordinateur
EP1347360A3 (fr) * 2002-03-20 2005-02-16 Kabushiki Kaisha Toshiba Dispositif de commande de l'alimentation
US7043543B2 (en) 1996-07-23 2006-05-09 Server Technology, Inc. Vertical-mount electrical power distribution plugstrip
US7099934B1 (en) 1996-07-23 2006-08-29 Ewing Carrel W Network-connecting power manager for remote appliances
US7171461B2 (en) 1996-07-23 2007-01-30 Server Technology, Inc. Network remote power management outlet strip
WO2008073833A3 (fr) * 2006-12-08 2008-07-31 Liebert Corp Système d'alimentation géré par utilisateur comportant une sécurité
US7860955B2 (en) 2006-12-08 2010-12-28 Liebert Corporation Self-configuring IP addressable devices utilizing two ethernet protocol IP ports
US7857214B2 (en) 2007-04-26 2010-12-28 Liebert Corporation Intelligent track system for mounting electronic equipment
US7969156B2 (en) 2007-03-30 2011-06-28 Liebert Corporation Method and apparatus for monitoring a load
US7982335B2 (en) 2008-03-19 2011-07-19 Liebert Corporation Adaptive power strip
US8181043B1 (en) 1999-05-11 2012-05-15 Cyber Switching, Inc. Methods and apparatus for improved remotely switchable power supply
US8876548B2 (en) 2008-03-31 2014-11-04 Panduit Corp. Rack unit outlet spacing for power outlet units
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US5596628A (en) * 1994-02-09 1997-01-21 Klein; Jon Method and apparatus for initiating loading of software in a personal computer in response to an incoming signal
EP0671831A1 (fr) * 1994-03-07 1995-09-13 Martignoni Electronics Ag Dispositif de réception de données
CH685656A5 (de) * 1994-03-07 1995-08-31 Martignoni Electronics Ag Einrichtung zum Empfang von Daten.
WO1995028785A1 (fr) * 1994-04-15 1995-10-26 Aegis Technologies, Inc. Controleur superviseur d'interface et procede de commande a distance d'un terminal
US5537462A (en) * 1994-04-15 1996-07-16 Aegis Technologies, Inc. Supervisory interface controller and method for remotely controlled terminal
US7171461B2 (en) 1996-07-23 2007-01-30 Server Technology, Inc. Network remote power management outlet strip
US9104393B2 (en) 1996-07-23 2015-08-11 Server Technology, Inc. Power-manager configuration upload and download method and system for network managers
US6711613B1 (en) 1996-07-23 2004-03-23 Server Technology, Inc. Remote power control system
US9450386B2 (en) 1996-07-23 2016-09-20 Server Technology, Inc. Vertical-mount electrical power distribution plugstrip
US7010589B2 (en) 1996-07-23 2006-03-07 Server Technology, Inc. Remote power control system
US7043543B2 (en) 1996-07-23 2006-05-09 Server Technology, Inc. Vertical-mount electrical power distribution plugstrip
US7099934B1 (en) 1996-07-23 2006-08-29 Ewing Carrel W Network-connecting power manager for remote appliances
GB2339931A (en) * 1998-05-06 2000-02-09 Jim Delaney Microprocessor-based computer control unit
US8181043B1 (en) 1999-05-11 2012-05-15 Cyber Switching, Inc. Methods and apparatus for improved remotely switchable power supply
US9627888B2 (en) 2000-12-08 2017-04-18 Server Technology, Inc. Electrical power distribution device having a current display
EP1347360A3 (fr) * 2002-03-20 2005-02-16 Kabushiki Kaisha Toshiba Dispositif de commande de l'alimentation
EP1623332A4 (fr) * 2003-05-09 2009-04-22 Samsung Electronics Co Ltd Ordinateur et systeme de commande a distance utilisant cet ordinateur
WO2004100008A1 (fr) 2003-05-09 2004-11-18 Samsung Electronics Co. Ltd. Ordinateur et systeme de commande a distance utilisant cet ordinateur
WO2008073833A3 (fr) * 2006-12-08 2008-07-31 Liebert Corp Système d'alimentation géré par utilisateur comportant une sécurité
US7860955B2 (en) 2006-12-08 2010-12-28 Liebert Corporation Self-configuring IP addressable devices utilizing two ethernet protocol IP ports
US7987248B2 (en) 2006-12-08 2011-07-26 Liebert Corporation Self-configuring IP addressable devices utilizing two ethernet protocol IP ports
US8450874B2 (en) 2006-12-08 2013-05-28 Liebert Corporation User managed power system with security
US7969156B2 (en) 2007-03-30 2011-06-28 Liebert Corporation Method and apparatus for monitoring a load
US7857214B2 (en) 2007-04-26 2010-12-28 Liebert Corporation Intelligent track system for mounting electronic equipment
US8264099B2 (en) 2008-03-19 2012-09-11 Liebert Corporation Portable display for adaptive power strip
US8207627B2 (en) 2008-03-19 2012-06-26 Liebert Corporation Adaptive power strip
US7982335B2 (en) 2008-03-19 2011-07-19 Liebert Corporation Adaptive power strip
US8876548B2 (en) 2008-03-31 2014-11-04 Panduit Corp. Rack unit outlet spacing for power outlet units
US9703342B2 (en) 2012-02-10 2017-07-11 Server Technology, Inc. System and method for configuring plurality of linked power distribution units in which configuration data of the linked power distribution units are accessible by the remote system
US10983578B2 (en) 2012-02-10 2021-04-20 Server Technology, Inc. Systems and methods for configuring a power distribution unit
US12189447B2 (en) 2012-02-10 2025-01-07 Legrand DPC, LLC Systems and methods for configuring a power distribution unit
US10404559B2 (en) 2015-07-17 2019-09-03 Dataprobe Inc. Apparatus and system for automatically rebooting an electronically powered device via power over ethernet
CN107438008A (zh) * 2017-06-01 2017-12-05 上海斐讯数据通信技术有限公司 一种poe的供电系统和方法

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