BR9406019A - Método para acesso seguro em um sistema de extensão de extensão telefônica - Google Patents

Método para acesso seguro em um sistema de extensão de extensão telefônica

Info

Publication number
BR9406019A
BR9406019A BR9406019A BR9406019A BR9406019A BR 9406019 A BR9406019 A BR 9406019A BR 9406019 A BR9406019 A BR 9406019A BR 9406019 A BR9406019 A BR 9406019A BR 9406019 A BR9406019 A BR 9406019A
Authority
BR
Brazil
Prior art keywords
extension
matching
central office
line
line carrier
Prior art date
Application number
BR9406019A
Other languages
English (en)
Inventor
David B Bartholomew
A Ray Ivie
Alma Schuring
Original Assignee
Phonex Corp
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 Phonex Corp filed Critical Phonex Corp
Publication of BR9406019A publication Critical patent/BR9406019A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
    • H04M9/022—Multiplex systems
    • H04M9/027—Frequency division multiplex systems
    • 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
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
    • 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
    • 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
    • H04B2203/5441—Wireless systems or telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/60—Aspects of automatic or semi-automatic exchanges related to security aspects in telephonic communication systems
    • H04M2203/609—Secret communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Alarm Systems (AREA)
  • Exchange Systems With Centralized Control (AREA)
BR9406019A 1993-03-22 1994-03-21 Método para acesso seguro em um sistema de extensão de extensão telefônica BR9406019A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/034,086 US5530737A (en) 1993-03-22 1993-03-22 Secure access telephone extension system and method
PCT/US1994/003110 WO1994022257A1 (en) 1993-03-22 1994-03-21 Secure access telephone extension system and method

Publications (1)

Publication Number Publication Date
BR9406019A true BR9406019A (pt) 1995-12-19

Family

ID=21874219

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9406019A BR9406019A (pt) 1993-03-22 1994-03-21 Método para acesso seguro em um sistema de extensão de extensão telefônica

Country Status (13)

Country Link
US (2) US5530737A (pt)
EP (1) EP0691059B1 (pt)
JP (1) JPH08511381A (pt)
KR (1) KR100196492B1 (pt)
CN (1) CN1119009C (pt)
AT (1) ATE270017T1 (pt)
AU (1) AU6766194A (pt)
BR (1) BR9406019A (pt)
CA (1) CA2155220C (pt)
DE (1) DE69433861T2 (pt)
ES (1) ES2227526T3 (pt)
TW (1) TW321811B (pt)
WO (1) WO1994022257A1 (pt)

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ES2227526T3 (es) 2005-04-01
CN1119009C (zh) 2003-08-20
CN1124078A (zh) 1996-06-05
EP0691059B1 (en) 2004-06-23
US5852785A (en) 1998-12-22
TW321811B (pt) 1997-12-01
ATE270017T1 (de) 2004-07-15
US5530737A (en) 1996-06-25
AU6766194A (en) 1994-10-11
CA2155220C (en) 1999-08-17
KR100196492B1 (ko) 1999-06-15
WO1994022257A1 (en) 1994-09-29
DE69433861T2 (de) 2005-07-28
JPH08511381A (ja) 1996-11-26
EP0691059A4 (en) 1999-11-24
EP0691059A1 (en) 1996-01-10
DE69433861D1 (de) 2004-07-29
CA2155220A1 (en) 1994-09-29
KR960701552A (ko) 1996-02-24

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