NL7707137A - RECEIVE SEND DEVICE. - Google Patents

RECEIVE SEND DEVICE.

Info

Publication number: NL7707137A
Authority: NL; Netherlands
Prior art keywords: send device; receive send; receive; send
Prior art date: 1976-08-19

Application number

NL7707137A

Other languages

Dutch (nl)

Original Assignee

Northern Telecom Ltd

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.)

1976-08-19

Filing date

1977-06-28

Publication date

1978-02-21

1977-06-28 Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd

1978-02-21 Publication of NL7707137A publication Critical patent/NL7707137A/en

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
- 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
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
- H04M1/505—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies signals generated in digital form

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Computer Networks & Wireless Communication (AREA)
Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Interface Circuits In Exchanges (AREA)
Telephonic Communication Services (AREA)

NL7707137A 1976-08-19 1977-06-28 RECEIVE SEND DEVICE. NL7707137A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA259,463A CA1053821A (en)	1976-08-19	1976-08-19	Receiver/sender for signalling between telephone switching facilities

Publications (1)

Publication Number	Publication Date
NL7707137A true NL7707137A (en)	1978-02-21

Family

ID=4106691

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL7707137A NL7707137A (en)	1976-08-19	1977-06-28	RECEIVE SEND DEVICE.

Country Status (9)

Country	Link
JP (1)	JPS5324706A (en)
BE (1)	BE857802A (en)
CA (1)	CA1053821A (en)
DE (1)	DE2735478A1 (en)
ES (1)	ES461745A1 (en)
FR (1)	FR2362545A1 (en)
GB (1)	GB1553019A (en)
NL (1)	NL7707137A (en)
SE (1)	SE7709370L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH0219296A (en) *	1988-07-05	1990-01-23	Tokyo Kyoei Shokai:Kk	Hopper gate opening and closing apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3603773A (en) *	1969-08-28	1971-09-07	Vernitron Corp	Digital pulse rate generator
US3716794A (en) *	1972-04-26	1973-02-13	E Teggatz	Frequency dividing apparatus
FR2280141A1 (en) *	1974-07-26	1976-02-20	Materiel Telephonique	SIGNALING SYSTEM BETWEEN DATA PROCESSING CENTERS

1976
- 1976-08-19 CA CA259,463A patent/CA1053821A/en not_active Expired
1977
- 1977-06-21 GB GB2591677A patent/GB1553019A/en not_active Expired
- 1977-06-28 NL NL7707137A patent/NL7707137A/en not_active Application Discontinuation
- 1977-08-05 DE DE19772735478 patent/DE2735478A1/en not_active Withdrawn
- 1977-08-12 JP JP9622977A patent/JPS5324706A/en active Pending
- 1977-08-16 BE BE180182A patent/BE857802A/en unknown
- 1977-08-18 FR FR7725289A patent/FR2362545A1/en not_active Withdrawn
- 1977-08-19 SE SE7709370A patent/SE7709370L/sv unknown
- 1977-08-19 ES ES461745A patent/ES461745A1/en not_active Expired

Also Published As

Publication number	Publication date
GB1553019A (en)	1979-09-19
DE2735478A1 (en)	1978-02-23
BE857802A (en)	1978-02-16
SE7709370L (en)	1978-02-20
FR2362545A1 (en)	1978-03-17
ES461745A1 (en)	1978-05-01
JPS5324706A (en)	1978-03-07
CA1053821A (en)	1979-05-01

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Legal Events

Date	Code	Title	Description
1980-02-25	BV	The patent application has lapsed