SG42187G - Telephone ringing signal generation - Google Patents

Telephone ringing signal generation

Info

Publication number
SG42187G
SG42187G SG421/87A SG42187A SG42187G SG 42187 G SG42187 G SG 42187G SG 421/87 A SG421/87 A SG 421/87A SG 42187 A SG42187 A SG 42187A SG 42187 G SG42187 G SG 42187G
Authority
SG
Singapore
Prior art keywords
signal generation
ringing signal
telephone ringing
telephone
generation
Prior art date
Application number
SG421/87A
Original Assignee
Stc Plc
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 Stc Plc filed Critical Stc Plc
Publication of SG42187G publication Critical patent/SG42187G/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/026—Arrangements for interrupting the ringing current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • 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
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
SG421/87A 1981-12-03 1987-05-07 Telephone ringing signal generation SG42187G (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08136509A GB2113044B (en) 1981-12-03 1981-12-03 Telephone ringing signal generation

Publications (1)

Publication Number Publication Date
SG42187G true SG42187G (en) 1987-07-17

Family

ID=10526358

Family Applications (1)

Application Number Title Priority Date Filing Date
SG421/87A SG42187G (en) 1981-12-03 1987-05-07 Telephone ringing signal generation

Country Status (5)

Country Link
AU (1) AU558417B2 (en)
GB (1) GB2113044B (en)
HK (1) HK75887A (en)
NZ (1) NZ202666A (en)
SG (1) SG42187G (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3189054B2 (en) * 1991-05-07 2001-07-16 富士通株式会社 Subscriber device
DE4207985A1 (en) * 1992-03-13 1993-09-16 Sel Alcatel Ag METHOD AND CIRCUIT FOR TRANSMITTING DIGITAL SIGNALS OVER SUBSCRIBER LINES
US6167135A (en) * 1995-12-01 2000-12-26 Telefonaktiebolaget Lm Ericsson Method and apparatus for generating a ringing signal
SE506296C2 (en) * 1995-12-01 1997-12-01 Ericsson Telefon Ab L M Method and apparatus for generating a ring signal
DE10240815B4 (en) 2002-08-30 2006-02-23 Infineon Technologies Ag Method for setting a call signal stream in a subscriber line and circuit arrangement

Also Published As

Publication number Publication date
AU558417B2 (en) 1987-01-29
GB2113044A (en) 1983-07-27
AU9100282A (en) 1983-06-09
HK75887A (en) 1987-10-23
GB2113044B (en) 1985-05-01
NZ202666A (en) 1985-10-11

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