EP0120959A1 - Fernsprechnebenstellen-system - Google Patents

Fernsprechnebenstellen-system

Info

Publication number
EP0120959A1
EP0120959A1 EP83903636A EP83903636A EP0120959A1 EP 0120959 A1 EP0120959 A1 EP 0120959A1 EP 83903636 A EP83903636 A EP 83903636A EP 83903636 A EP83903636 A EP 83903636A EP 0120959 A1 EP0120959 A1 EP 0120959A1
Authority
EP
European Patent Office
Prior art keywords
telephone
station
signal
line
signals
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP83903636A
Other languages
English (en)
French (fr)
Inventor
William M. Brown
James R. Lindquist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Astech Inc
Original Assignee
Astech 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
Priority claimed from US06/430,762 external-priority patent/US4514594A/en
Priority claimed from US06/431,400 external-priority patent/US4475193A/en
Priority claimed from US06/445,499 external-priority patent/US4523307A/en
Application filed by Astech Inc filed Critical Astech Inc
Publication of EP0120959A1 publication Critical patent/EP0120959A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5437—Wired telephone

Definitions

  • Patent No. 3,949,172 is not immune to eavesdropping by others who have access to the same AC power line. It is another object to provide protection against such eavesdropping.
  • the subscriber's premises has a telephone line 1 which usually consists of four wires (not shown) called the tip line, the ring line, earth ground and a fourth line for special party line ringing circuits.
  • the ring line is usually red
  • the tip line is green
  • the earth ground is black
  • the fourth line is yellow.
  • three of these lines, the tip, ring and ground connect to "on line" conventional telephones at the premises and also connect to telephone line wall jacks 2.
  • This incoming call can be answered by any of the system telephones, or all can simultaneously engage the incoming call and communicate with each other.
  • the incoming caller and all the system telephones can conference together.
  • the incoming call is not terminated at the subscriber's location until all of the system telephones are on hook (cradled) .
  • any of the system telephone can place a call to the telephone line, just as any conventional phone places a call, by the phone going off hook and signalling the call number by using the phone's key pad (buttons) ; and before, during or after this signaling, the other phones of the system can go off hook and join in the call.
  • the main TX-RX computer 31 processes all system signals between the main and extension phones. More particularl , it processes all initiating and terminating signals from the telephone line including ring signals, processes all signals from the system extension telephones, processes the main telephone hook switch signal derived from hook switch 23, processes all signals from the main key pad 32, controls the subset (SS) relay switch 33, the carrier (C) relay switch 34 and the hold (H) relay switch 35, (all in the telephone line interface 21) , turns the main transmitter 25 on and off, adds CODE to the analog VOICE transmitted by the main transmitter and controls the system dual tone multi-frequency (DTMF) generator 36, depending on coded key pad signals received at the main from an extension.
  • DTMF system dual tone multi-frequency
  • the main telephone computer may store twelve additional numbers with a maximum of 160 digits, the last number dialed at the main being included among these digits.
  • the numbers that are stored in the main telephone computer are entered into storage in the main computer by the operator thereof as follows: first coming off-hook; then pressing the S button; then the "#" button; then one of the twelve buttons in the top three rows of the key pad (see Figure 14A) ; and then pressing the specific telephone number to be entered by pressing that number in the sequence of keys of the pad. Entry of the stored number can be stopped by either the main phone going on-hook or by pressing any of the feature buttons I, H, P or S.
  • the response at E2 is to receive RXm, detect the CD2 (for BUZ) and activate E2 ring drive 47 with a BUZ signal and so E2 is buzzed for an intercom communication;
  • E2 - Off Hk When E2 goes Off Hk, it turns on TX2, transmitting CD (for E2 - Off Hk) R @ M The response at M is to receive RX2, detect the CD (for E2 - Off Hk) which causes TXm to send CD2 (addressed to
  • Hybd are deactivated and relay SS is deactivated so that the outputs of MRX1 and MRX2, combined at 340 are fed directly through Hybd 27 as RX to the input of MTXM and El and E2 remain in intercom; and so El + E2 - I Routine status is achieved.
  • the main phone power supply, regulator 32 provides all operating power for the main phone except power derived from the telephone line for operating parts of the telephone line interface system 21 and for operating the main DTMF 37 as already described.
  • the power supply 32 produces 12 volts and 5 volts DC for operating the systems and subsystems in the main phone.
  • Power to regulator 32 comes from transformer 72M in the adaptor plug.
  • the primary side 73M of that transformer connects directly across the power line and the secondary has a center tap that is carried by cord 6a to terminal 3 in the main phone that provides the main phone ground while the two ends of the secondary are connected together via diodes 75M, as shown, providing rectified positive voltage that is carried by cord 6a to terminal 1 in the
  • the keypad outputs are designated by their row and column symbol rather than the pin and the pin designation is described only with reference to these figures.
  • the pin designation is not carried through in the descriptions of operations of the keypad system elsewhere herein.
  • the electrical connections between the extension keypad 53 and the extension computer 44 and extension address set switches 54 is described more fully hereinbelow with reference to Fig. 17.
  • dial tones are coupled by transformer actions to the secondary 22e, which is across the tip and ring

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
EP83903636A 1982-09-30 1983-09-29 Fernsprechnebenstellen-system Withdrawn EP0120959A1 (de)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US43085182A 1982-09-30 1982-09-30
US06/430,762 US4514594A (en) 1982-09-30 1982-09-30 Power line carrier telephone extension system for full duplex conferencing between telephones and having telephone call hold capability
US06/431,400 US4475193A (en) 1982-09-30 1982-09-30 Power line carrier multi telephone extension system for full duplex conferencing between telephones
US445499 1982-11-30
US06/445,499 US4523307A (en) 1982-11-30 1982-11-30 Power line carrier multi telephone extension system for full duplex conferencing and intercom between telephones
US431400 1989-11-03
US430762 1999-10-29
US430851 1999-11-01

Publications (1)

Publication Number Publication Date
EP0120959A1 true EP0120959A1 (de) 1984-10-10

Family

ID=27503790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83903636A Withdrawn EP0120959A1 (de) 1982-09-30 1983-09-29 Fernsprechnebenstellen-system

Country Status (2)

Country Link
EP (1) EP0120959A1 (de)
WO (1) WO1984001481A1 (de)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1310682C (en) * 1988-09-27 1992-11-24 Kwc Ag Water fitting, particularly for sanitary domestic installations
CA1323906C (en) * 1988-09-27 1993-11-02 Ferdinand F. Hochstrasser Water fitting, particularly for sanitary domestic installations
US5127045A (en) * 1989-11-16 1992-06-30 Cragun David R Identifying telephone controller system
GB9222205D0 (en) 1992-10-22 1992-12-02 Norweb Plc Low voltage filter
US6144292A (en) * 1992-10-22 2000-11-07 Norweb Plc Powerline communications network employing TDMA, FDMA and/or CDMA
US6282405B1 (en) 1992-10-22 2001-08-28 Norweb Plc Hybrid electricity and telecommunications distribution network
ES2133425T3 (es) * 1993-02-16 1999-09-16 Siemens Schweiz Ag Dispositivo de circuito para activar aparatos a traves de una linea de transmision comun.
GB9417359D0 (en) * 1994-08-26 1994-10-19 Norweb Plc A power transmission network and filter therefor
WO1999055065A1 (en) * 1998-04-20 1999-10-28 Premisenet Incorporated Telephone control module and user site network and methods of operation
WO2001054297A1 (en) 2000-01-20 2001-07-26 Current Technologies, Llc Method of isolating data in a power line communication network
US6998962B2 (en) 2000-04-14 2006-02-14 Current Technologies, Llc Power line communication apparatus and method of using the same
US7103240B2 (en) 2001-02-14 2006-09-05 Current Technologies, Llc Method and apparatus for providing inductive coupling and decoupling of high-frequency, high-bandwidth data signals directly on and off of a high voltage power line
US6965302B2 (en) 2000-04-14 2005-11-15 Current Technologies, Llc Power line communication system and method of using the same
US6980089B1 (en) 2000-08-09 2005-12-27 Current Technologies, Llc Non-intrusive coupling to shielded power cable
EP1371219A4 (de) 2001-02-14 2006-06-21 Current Tech Llc Datenkommunikation über eine stromversorgungsleitung
US7053756B2 (en) 2001-12-21 2006-05-30 Current Technologies, Llc Facilitating communication of data signals on electric power systems
US7102478B2 (en) 2002-06-21 2006-09-05 Current Technologies, Llc Power line coupling device and method of using the same
US6982611B2 (en) 2002-06-24 2006-01-03 Current Technologies, Llc Power line coupling device and method of using the same
US6980090B2 (en) 2002-12-10 2005-12-27 Current Technologies, Llc Device and method for coupling with electrical distribution network infrastructure to provide communications
US6980091B2 (en) 2002-12-10 2005-12-27 Current Technologies, Llc Power line communication system and method of operating the same
US7064654B2 (en) 2002-12-10 2006-06-20 Current Technologies, Llc Power line communication system and method of operating the same
US7075414B2 (en) 2003-05-13 2006-07-11 Current Technologies, Llc Device and method for communicating data signals through multiple power line conductors
US6965303B2 (en) 2002-12-10 2005-11-15 Current Technologies, Llc Power line communication system and method
US7046124B2 (en) 2003-01-21 2006-05-16 Current Technologies, Llc Power line coupling device and method of using the same
US7308103B2 (en) 2003-05-08 2007-12-11 Current Technologies, Llc Power line communication device and method of using the same
US7460467B1 (en) 2003-07-23 2008-12-02 Current Technologies, Llc Voice-over-IP network test device and method
US7113134B1 (en) 2004-03-12 2006-09-26 Current Technologies, Llc Transformer antenna device and method of using the same
US7856007B2 (en) 2005-10-21 2010-12-21 Current Technologies, Llc Power line communication voice over IP system and method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE789519A (fr) * 1971-10-01 1973-03-29 Dole Electro Systems Systeme de distribution d'energie electrique d'alimentation et d'energie porteuse d'informations au moyen d'une structure stratifiee
AU509005B2 (en) * 1974-02-08 1980-04-17 Astech Inc. Telephone extension system utilising available powerlines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8401481A1 *

Also Published As

Publication number Publication date
WO1984001481A1 (en) 1984-04-12

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI NL SE

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Designated state(s): AT BE CH DE FR GB LI NL SE

17P Request for examination filed

Effective date: 19841011

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19871107

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BROWN, WILLIAM, M.

Inventor name: LINDQUIST, JAMES, R.