GB1531671A - Methods of detecting the use of telephone extensions in automatic private branch telephone exchanges and circuit arrangements for carrying out the methods - Google Patents

Methods of detecting the use of telephone extensions in automatic private branch telephone exchanges and circuit arrangements for carrying out the methods

Info

Publication number
GB1531671A
GB1531671A GB2140/77A GB214077A GB1531671A GB 1531671 A GB1531671 A GB 1531671A GB 2140/77 A GB2140/77 A GB 2140/77A GB 214077 A GB214077 A GB 214077A GB 1531671 A GB1531671 A GB 1531671A
Authority
GB
United Kingdom
Prior art keywords
methods
exchange
line
detected
telephone
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.)
Expired
Application number
GB2140/77A
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.)
Sodeco Saia AG
Societe des Compteurs de Geneve SODECO
Original Assignee
Sodeco Saia AG
Societe des Compteurs de Geneve SODECO
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 Sodeco Saia AG, Societe des Compteurs de Geneve SODECO filed Critical Sodeco Saia AG
Publication of GB1531671A publication Critical patent/GB1531671A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/34—Charging, billing or metering arrangements for private branch exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Meter Arrangements (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)

Abstract

1531671 Automatic exchange systems SODECO-SAIA AG 19 Jan 1977 [26 Jan 1976] 02140/77 Heading H4K The use of telephone extensions of a PABX is detected by periodically feeding tone pulses into active exchange lines and detecting those tones at the extension lines. As shown line current in an exchange line 4 of a PABX7 is detected at 2. Immediately thereafter and after each exchange metering pulse as detected at 1, a monitoring unit 5 repeatedly transmits a train of tone pulses via a coupling unit 4 to the line. A filter 18 prevents the tones reaching the exchange. The trains are verified in a detector 14 individual to the extension line involved. The detector transmits the line identity to monitoring unit 5 where it is printed or logged for billing.
GB2140/77A 1976-01-26 1977-01-19 Methods of detecting the use of telephone extensions in automatic private branch telephone exchanges and circuit arrangements for carrying out the methods Expired GB1531671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH87876A CH592988A5 (en) 1976-01-26 1976-01-26

Publications (1)

Publication Number Publication Date
GB1531671A true GB1531671A (en) 1978-11-08

Family

ID=4197274

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2140/77A Expired GB1531671A (en) 1976-01-26 1977-01-19 Methods of detecting the use of telephone extensions in automatic private branch telephone exchanges and circuit arrangements for carrying out the methods

Country Status (8)

Country Link
AT (1) AT357609B (en)
CH (1) CH592988A5 (en)
DE (1) DE2607397C3 (en)
ES (1) ES455321A1 (en)
FR (1) FR2339302A1 (en)
GB (1) GB1531671A (en)
NO (1) NO144185C (en)
SE (1) SE7700719L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816034C3 (en) * 1978-04-13 1985-07-18 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for the system-independent recording of call data and charges
AT397447B (en) * 1986-11-06 1994-04-25 Schrack Elektronik Ag DIGITAL PABX WITH TRANSMISSION OF TELEPHONE FEES

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151219A (en) * 1959-07-28 1964-09-29 Gen Dynamics Corp Tone detecting circuitry
FR2036440A5 (en) * 1969-03-14 1970-12-24 Landis & Gyr Ag
SE377022B (en) * 1970-06-10 1975-06-16 Commw Of Australia
FR2358067A1 (en) * 1976-07-08 1978-02-03 Ericsson Telefon Ab L M Monitoring signal routes in telephone networks - uses cyclic distribution of sinusoidal wave over network and synchronous sampling of exchange outputs

Also Published As

Publication number Publication date
SE7700719L (en) 1977-07-27
DE2607397C3 (en) 1978-11-16
DE2607397B2 (en) 1978-03-23
FR2339302A1 (en) 1977-08-19
ES455321A1 (en) 1978-05-01
DE2607397A1 (en) 1977-12-08
NO144185C (en) 1981-07-08
AT357609B (en) 1980-07-25
FR2339302B1 (en) 1982-03-12
NO770159L (en) 1977-07-27
CH592988A5 (en) 1977-11-15
ATA10577A (en) 1979-12-15
NO144185B (en) 1981-03-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee