GB2121648B - Ring detector and telephone line monitoring system for telephone answering unit - Google Patents

Ring detector and telephone line monitoring system for telephone answering unit

Info

Publication number
GB2121648B
GB2121648B GB08225462A GB8225462A GB2121648B GB 2121648 B GB2121648 B GB 2121648B GB 08225462 A GB08225462 A GB 08225462A GB 8225462 A GB8225462 A GB 8225462A GB 2121648 B GB2121648 B GB 2121648B
Authority
GB
United Kingdom
Prior art keywords
telephone
monitoring system
line monitoring
ring detector
answering unit
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
GB08225462A
Other languages
English (en)
Other versions
GB2121648A (en
Inventor
Bradford E Hanscom
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.)
TAD AVANTI
T A D AVANTI Inc
Original Assignee
TAD AVANTI
T A D AVANTI Inc
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 TAD AVANTI, T A D AVANTI Inc filed Critical TAD AVANTI
Publication of GB2121648A publication Critical patent/GB2121648A/en
Application granted granted Critical
Publication of GB2121648B publication Critical patent/GB2121648B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB08225462A 1982-05-24 1982-09-07 Ring detector and telephone line monitoring system for telephone answering unit Expired GB2121648B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US38118582A 1982-05-24 1982-05-24

Publications (2)

Publication Number Publication Date
GB2121648A GB2121648A (en) 1983-12-21
GB2121648B true GB2121648B (en) 1986-12-03

Family

ID=23504036

Family Applications (2)

Application Number Title Priority Date Filing Date
GB08225462A Expired GB2121648B (en) 1982-05-24 1982-09-07 Ring detector and telephone line monitoring system for telephone answering unit
GB08527469A Expired GB2166926B (en) 1982-05-24 1985-11-07 Ring detector and telephone line monitoring system for telephone answering instrument

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB08527469A Expired GB2166926B (en) 1982-05-24 1985-11-07 Ring detector and telephone line monitoring system for telephone answering instrument

Country Status (2)

Country Link
JP (1) JPS5860861A (enrdf_load_stackoverflow)
GB (2) GB2121648B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60256236A (ja) * 1984-06-01 1985-12-17 Hashimoto Corp 不在応答録音機能を有するコ−ドレスホ−ン

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA952634A (en) * 1971-01-18 1974-08-06 Robert F. Mcalonie Tone ringer
JPS5220283B2 (enrdf_load_stackoverflow) * 1973-08-08 1977-06-02
JPS5916457B2 (ja) * 1976-05-06 1984-04-16 パイオニア株式会社 起動回路
IT1083388B (it) * 1977-06-20 1985-05-21 Cselt Centro Studi Lab Telecom Suoneria elettronica per apparecchi telefonici
GB1594765A (en) * 1978-03-09 1981-08-05 Ansafone Ltd Telephone answering machines

Also Published As

Publication number Publication date
GB2166926A (en) 1986-05-14
JPH03823B2 (enrdf_load_stackoverflow) 1991-01-09
GB2166926B (en) 1986-11-26
JPS5860861A (ja) 1983-04-11
GB2121648A (en) 1983-12-21
GB8527469D0 (en) 1985-12-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee