CA1145496A - Microcomputer controlled key telephone line circuit - Google Patents

Microcomputer controlled key telephone line circuit

Info

Publication number: CA1145496A
Authority: CA; Canada
Prior art keywords: key; signal; line; response; signaling
Prior art date: 1979-10-03
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

CA000361162A

Other languages

English (en)

French (fr)

Inventor

Paul U. Lind

Thomas E. White

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.)

GTE Communication Systems Corp

Original Assignee

GTE Automatic Electric 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.)

1979-10-03

Filing date

1980-09-26

Publication date

1983-04-26

1980-09-26 Application filed by GTE Automatic Electric Inc filed Critical GTE Automatic Electric Inc

1983-04-26 Application granted granted Critical

1983-04-26 Publication of CA1145496A publication Critical patent/CA1145496A/en

Status Expired legal-status Critical Current

Links

238000001514 detection method Methods 0.000 claims abstract description 37
230000011664 signaling Effects 0.000 claims abstract description 35
230000004044 response Effects 0.000 claims abstract description 27
238000000034 method Methods 0.000 claims description 14
230000000007 visual effect Effects 0.000 claims 10
230000002401 inhibitory effect Effects 0.000 claims 5
230000000737 periodic effect Effects 0.000 claims 3
229940035564 duration Drugs 0.000 claims 1
230000006870 function Effects 0.000 abstract description 14
238000005286 illumination Methods 0.000 abstract description 4
239000003990 capacitor Substances 0.000 description 6
230000010354 integration Effects 0.000 description 3
238000004804 winding Methods 0.000 description 3
239000000306 component Substances 0.000 description 2
230000003287 optical effect Effects 0.000 description 2
230000015556 catabolic process Effects 0.000 description 1
230000009849 deactivation Effects 0.000 description 1
230000000881 depressing effect Effects 0.000 description 1
230000000994 depressogenic effect Effects 0.000 description 1
238000010586 diagram Methods 0.000 description 1
239000007787 solid Substances 0.000 description 1
230000007704 transition Effects 0.000 description 1

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
- H04M9/006—Exchange line circuits

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Telephonic Communication Services (AREA)
Monitoring And Testing Of Exchanges (AREA)

CA000361162A 1979-10-03 1980-09-26 Microcomputer controlled key telephone line circuit Expired CA1145496A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US8158279A	1979-10-03	1979-10-03
US81,582		1979-10-03

Publications (1)

Publication Number	Publication Date
CA1145496A true CA1145496A (en)	1983-04-26

Family

ID=22165069

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA000361162A Expired CA1145496A (en)	1979-10-03	1980-09-26	Microcomputer controlled key telephone line circuit

Country Status (3)

Country	Link
BE (1)	BE884368A (it)
CA (1)	CA1145496A (it)
IT (1)	IT1132808B (it)

1980
- 1980-07-18 BE BE2/58656A patent/BE884368A/fr not_active IP Right Cessation
- 1980-09-26 CA CA000361162A patent/CA1145496A/en not_active Expired
- 1980-09-29 IT IT24996/80A patent/IT1132808B/it active

Also Published As

Publication number	Publication date
BE884368A (fr)	1980-11-17
IT8024996A0 (it)	1980-09-29
IT1132808B (it)	1986-07-09

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Legal Events

Date	Code	Title	Description
2000-04-26	MKEX	Expiry