GB2043398B - Telephone circuitry - Google Patents

Telephone circuitry

Info

Publication number: GB2043398B
Authority: GB; United Kingdom
Prior art keywords: telephone circuitry; circuitry; telephone
Prior art date: 1979-02-27
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

GB7906838A

Other versions

GB2043398A (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.)

STC PLC

Original Assignee

Standard Telephone and Cables 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.)

1979-02-27

Filing date

1979-02-27

Publication date

1983-01-19

1979-02-27 Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC

1979-02-27 Priority to GB7906838A priority Critical patent/GB2043398B/en

1980-10-01 Publication of GB2043398A publication Critical patent/GB2043398A/en

1983-01-19 Application granted granted Critical

1983-01-19 Publication of GB2043398B publication Critical patent/GB2043398B/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
- H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Interface Circuits In Exchanges (AREA)

GB7906838A 1979-02-27 1979-02-27 Telephone circuitry Expired GB2043398B (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
GB7906838A GB2043398B (en)	1979-02-27	1979-02-27	Telephone circuitry

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB7906838A GB2043398B (en)	1979-02-27	1979-02-27	Telephone circuitry

Publications (2)

Publication Number	Publication Date
GB2043398A GB2043398A (en)	1980-10-01
GB2043398B true GB2043398B (en)	1983-01-19

Family

ID=10503455

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB7906838A Expired GB2043398B (en)	1979-02-27	1979-02-27	Telephone circuitry

Country Status (1)

Country	Link
GB (1)	GB2043398B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4794640A (en) *	1987-02-24	1988-12-27	Inventa Electronics Co., Ltd.	Switching control apparatus for intercom-telephone sets

1979
- 1979-02-27 GB GB7906838A patent/GB2043398B/en not_active Expired

Also Published As

Publication number	Publication date
GB2043398A (en)	1980-10-01

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Legal Events

Date	Code	Title	Description
1986-10-15	PCNP	Patent ceased through non-payment of renewal fee