WO2002030001A3 - Filter and method therefor - Google Patents

Filter and method therefor Download PDF

Info

Publication number
WO2002030001A3
WO2002030001A3 PCT/GB2001/004369 GB0104369W WO0230001A3 WO 2002030001 A3 WO2002030001 A3 WO 2002030001A3 GB 0104369 W GB0104369 W GB 0104369W WO 0230001 A3 WO0230001 A3 WO 0230001A3
Authority
WO
WIPO (PCT)
Prior art keywords
telephone
telephone system
line
subscriber
loop
Prior art date
Application number
PCT/GB2001/004369
Other languages
French (fr)
Other versions
WO2002030001A2 (en
Inventor
Roger J Williamson
Leslie Humphrey
Original Assignee
Nortel Networks Ltd
Roger J Williamson
Leslie Humphrey
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 Nortel Networks Ltd, Roger J Williamson, Leslie Humphrey filed Critical Nortel Networks Ltd
Priority to EP01972263A priority Critical patent/EP1325619A2/en
Priority to CA002424235A priority patent/CA2424235A1/en
Priority to AU2001292043A priority patent/AU2001292043A1/en
Publication of WO2002030001A2 publication Critical patent/WO2002030001A2/en
Publication of WO2002030001A3 publication Critical patent/WO2002030001A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/10—Compensating for variations in line balance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
    • H04M1/573—Line monitoring circuits for detecting caller identification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data

Abstract

A system and mechanism substantially to slow a transient generated during a loop-disconnect activity of a telephone set in a telephone system. The telephone system comprising a plurality of telephone sets (110, 126) coupled in parallel to a subscriber loop (100) and a data modem (138) coupled to the subscriber loop (100) providing data facilities at a frequency above that employed for a voice facility. The filter circuit (116) comprises an inductance (402) and an impedance (404) connected in series with a line, and a shunt element (409) connected in parallel with the line. The filter circuit (116) enables a Calling Line Identification (CLI) facility to be utilised in the telephone system of a subscriber.
PCT/GB2001/004369 2000-10-02 2001-10-01 Filter and method therefor WO2002030001A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01972263A EP1325619A2 (en) 2000-10-02 2001-10-01 Filter and method therefor
CA002424235A CA2424235A1 (en) 2000-10-02 2001-10-01 Filter and method therefor
AU2001292043A AU2001292043A1 (en) 2000-10-02 2001-10-01 Filter and method therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67721400A 2000-10-02 2000-10-02
US09/677,214 2000-10-02

Publications (2)

Publication Number Publication Date
WO2002030001A2 WO2002030001A2 (en) 2002-04-11
WO2002030001A3 true WO2002030001A3 (en) 2003-01-23

Family

ID=24717791

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/004369 WO2002030001A2 (en) 2000-10-02 2001-10-01 Filter and method therefor

Country Status (4)

Country Link
EP (1) EP1325619A2 (en)
AU (1) AU2001292043A1 (en)
CA (1) CA2424235A1 (en)
WO (1) WO2002030001A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103856625B (en) * 2012-12-07 2015-12-09 广州三星通信技术研究有限公司 Control device and the wireless communication terminal of doubleway output audio frequency

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0923221A1 (en) * 1997-12-09 1999-06-16 Nortel Networks Corporation Communications signal splitter and filter
EP1051020A2 (en) * 1999-05-06 2000-11-08 Nortel Networks Limited Telephone filter arrangement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0923221A1 (en) * 1997-12-09 1999-06-16 Nortel Networks Corporation Communications signal splitter and filter
EP1051020A2 (en) * 1999-05-06 2000-11-08 Nortel Networks Limited Telephone filter arrangement

Also Published As

Publication number Publication date
AU2001292043A1 (en) 2002-04-15
EP1325619A2 (en) 2003-07-09
CA2424235A1 (en) 2002-04-11
WO2002030001A2 (en) 2002-04-11

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