GB1348476A - Telephone subscriberstation circuit arrangements - Google Patents

Telephone subscriberstation circuit arrangements

Info

Publication number
GB1348476A
GB1348476A GB1172372A GB1172372A GB1348476A GB 1348476 A GB1348476 A GB 1348476A GB 1172372 A GB1172372 A GB 1172372A GB 1172372 A GB1172372 A GB 1172372A GB 1348476 A GB1348476 A GB 1348476A
Authority
GB
United Kingdom
Prior art keywords
diodes
bridge circuit
voltage
zener diodes
diverter
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
GB1172372A
Other languages
English (en)
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.)
Siemens Corp
Original Assignee
Siemens 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
Priority claimed from DE19712115757 external-priority patent/DE2115757B2/de
Priority claimed from DE19712115670 external-priority patent/DE2115670C2/de
Application filed by Siemens Corp filed Critical Siemens Corp
Publication of GB1348476A publication Critical patent/GB1348476A/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
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H04M1/745—Protection devices or circuits for voltages surges on the line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Emergency Protection Circuit Devices (AREA)
GB1172372A 1971-03-31 1972-03-14 Telephone subscriberstation circuit arrangements Expired GB1348476A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712115757 DE2115757B2 (de) 1971-03-31 1971-03-31 Schaltungsanordnung zum schutz von ueber anschlussleitungen mit gleichstrom gespeisten einrichtungenin fernmelde-, insbesondere fernsprechanlagen
DE19712115670 DE2115670C2 (de) 1971-03-31 1971-03-31 Schaltungsanordnung für Fernsprechstationen mit überspannungsgeschützten und polungsunabhängigen Mikrofonverstärkern in integrierter monolithischer Technik

Publications (1)

Publication Number Publication Date
GB1348476A true GB1348476A (en) 1974-03-20

Family

ID=25760899

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1172372A Expired GB1348476A (en) 1971-03-31 1972-03-14 Telephone subscriberstation circuit arrangements

Country Status (8)

Country Link
BE (1) BE781592A (enExample)
CH (1) CH543202A (enExample)
FR (1) FR2132175B1 (enExample)
GB (1) GB1348476A (enExample)
IT (1) IT950824B (enExample)
LU (1) LU65062A1 (enExample)
NL (1) NL7203908A (enExample)
SE (1) SE366449B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987006787A1 (en) * 1986-04-30 1987-11-05 Standard Telephones And Cables Pty. Limited Telephone protection circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987006787A1 (en) * 1986-04-30 1987-11-05 Standard Telephones And Cables Pty. Limited Telephone protection circuit
GB2211696A (en) * 1986-04-30 1989-07-05 Stc Plc Telephone protection circuit
GB2211696B (en) * 1986-04-30 1990-02-28 Stc Plc Telephone protection circuit

Also Published As

Publication number Publication date
SE366449B (enExample) 1974-04-22
BE781592A (fr) 1972-10-02
NL7203908A (enExample) 1972-10-03
LU65062A1 (enExample) 1972-07-11
FR2132175B1 (enExample) 1973-06-29
FR2132175A1 (enExample) 1972-11-17
CH543202A (de) 1973-10-15
IT950824B (it) 1973-06-20

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Legal Events

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