HK24277A - Improvements in or relating to supplying a charging current by way of telephone lines - Google Patents

Improvements in or relating to supplying a charging current by way of telephone lines

Info

Publication number
HK24277A
HK24277A HK242/77A HK24277A HK24277A HK 24277 A HK24277 A HK 24277A HK 242/77 A HK242/77 A HK 242/77A HK 24277 A HK24277 A HK 24277A HK 24277 A HK24277 A HK 24277A
Authority
HK
Hong Kong
Prior art keywords
relating
supplying
way
charging current
telephone lines
Prior art date
Application number
HK242/77A
Other languages
English (en)
Inventor
O Ch Matthews
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Publication of HK24277A publication Critical patent/HK24277A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
HK242/77A 1971-02-16 1977-05-19 Improvements in or relating to supplying a charging current by way of telephone lines HK24277A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB469971A GB1387565A (en) 1971-02-16 1971-02-16 Supplying a charging current by way of telephone lines
GB3913571 1971-08-20

Publications (1)

Publication Number Publication Date
HK24277A true HK24277A (en) 1977-05-27

Family

ID=26239320

Family Applications (1)

Application Number Title Priority Date Filing Date
HK242/77A HK24277A (en) 1971-02-16 1977-05-19 Improvements in or relating to supplying a charging current by way of telephone lines

Country Status (9)

Country Link
US (1) US3870822A (xx)
AU (1) AU466712B2 (xx)
BE (1) BE779451A (xx)
CA (1) CA941533A (xx)
FR (1) FR2125967A5 (xx)
GB (1) GB1387565A (xx)
HK (1) HK24277A (xx)
IT (1) IT949107B (xx)
NL (1) NL170582C (xx)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1520381A (en) * 1976-01-09 1978-08-09 Post Office Data transmission systems
FR2484749B1 (fr) * 1980-06-16 1987-10-30 Cit Alcatel Dispositif d'alimentation en energie electrique d'un equipement pouvant prendre deux etats correspondant a des consommations differentes
US4380687A (en) * 1981-03-27 1983-04-19 Gte Automatic Electric Laboratories, Inc. Power supply control circuit for subscriber carrier telephone system
US4374303A (en) * 1981-03-27 1983-02-15 Gte Automatic Electric Laboratories, Inc. Power supply control circuit for subscriber carrier telephone system
US4691344A (en) * 1986-01-21 1987-09-01 Aquatrol Corporation Low-powered remote sensor and telephone line transmitter
US4893332A (en) * 1986-05-12 1990-01-09 Aquatrol Corporation Low-powered remote sensor
US5446784A (en) * 1993-02-25 1995-08-29 Mactaggart; Donald Apparatus for coupling a telephone line to a telephone line subscriber device
US6480510B1 (en) 1998-07-28 2002-11-12 Serconet Ltd. Local area network of serial intelligent cells
US6956826B1 (en) 1999-07-07 2005-10-18 Serconet Ltd. Local area network for distributing data communication, sensing and control signals
US6690677B1 (en) * 1999-07-20 2004-02-10 Serconet Ltd. Network for telephony and data communication
US6549616B1 (en) 2000-03-20 2003-04-15 Serconet Ltd. Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets
US6580254B2 (en) * 2001-03-09 2003-06-17 Adtran, Inc. Apparatus and method for providing span power to communication equipment at a customer premise
US7567665B2 (en) * 2002-04-29 2009-07-28 Adc Dsl Systems, Inc. Function for controlling line powered network element
IL154234A (en) * 2003-01-30 2010-12-30 Mosaid Technologies Inc Method and system for providing dc power on local telephone lines
US20040239512A1 (en) * 2003-05-30 2004-12-02 Adc Dsl Systems, Inc. Lightning protection for a network element
US6998964B2 (en) * 2003-05-30 2006-02-14 Adc Dsl Systems, Inc. Splitter
IL159838A0 (en) 2004-01-13 2004-06-20 Yehuda Binder Information device
US7620171B2 (en) 2004-10-29 2009-11-17 Hubbell Incorporated Method and apparatus for powering a DS3 device
CN101035178B (zh) * 2006-03-10 2010-06-09 华为技术有限公司 远程供电系统、远端电源在位检测方法以及远程供电方法
US7433165B2 (en) * 2006-03-17 2008-10-07 Adc Dsl Systems, Inc. Auto-resetting span-power protection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601538A (en) * 1969-02-24 1971-08-24 Stromberg Carlson Corp Carrier and voice-frequency telephone system

Also Published As

Publication number Publication date
NL170582C (nl) 1982-11-16
CA941533A (en) 1974-02-05
FR2125967A5 (xx) 1972-09-29
IT949107B (it) 1973-06-11
DE2207255B2 (de) 1975-08-21
AU466712B2 (en) 1975-11-06
NL7201923A (xx) 1972-08-18
US3870822A (en) 1975-03-11
GB1387565A (en) 1975-03-19
AU3897472A (en) 1973-08-16
NL170582B (nl) 1982-06-16
BE779451A (fr) 1972-06-16
DE2207255A1 (de) 1972-09-07

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