GB982220A - Asymmetrical d.c.-signalling method - Google Patents
Asymmetrical d.c.-signalling methodInfo
- Publication number
- GB982220A GB982220A GB7267/63A GB726763A GB982220A GB 982220 A GB982220 A GB 982220A GB 7267/63 A GB7267/63 A GB 7267/63A GB 726763 A GB726763 A GB 726763A GB 982220 A GB982220 A GB 982220A
- Authority
- GB
- United Kingdom
- Prior art keywords
- interrogating
- voltages
- over
- code
- contact
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
-
- 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
- H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
-
- 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
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Telephonic Communication Services (AREA)
- Selective Calling Equipment (AREA)
- Devices For Supply Of Signal Current (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST18913A DE1160902B (de) | 1962-03-01 | 1962-03-01 | Unsymmetrisches Gleichstrom-Signalverfahren, insbesondere fuer die Tastwahl in Fernsprechanlagen |
| DEST20241A DE1173544B (de) | 1962-03-01 | 1963-01-31 | Unsymmetrisches Gleichstrom-Signalverfahren ueber zweiadrige Fernmelde-, insbesondere Fernsprechleitungen |
| DEST22144A DE1217460B (de) | 1962-03-01 | 1964-05-21 | Unsymmetrisches Gleichstrom-Tastwahlverfahren fuer Fernmelde-, insbesondere Fernsprechanlagen |
| DEST24001A DE1293873B (de) | 1962-03-01 | 1965-06-19 | Schaltungsanordnung zur Auswertung des Schleifenzustandes und zur Unterscheidung von Schleifenwiderstaenden einer Fernmelde-, insbesondere Fernsprechleitung |
| DEST24536A DE1278551B (de) | 1962-03-01 | 1965-10-20 | Schaltungsanordnung zur UEberwachung des Schleifenwiderstandes einer Fernmelde-, insbesondere Fernsprechleitung |
| DEST24545A DE1301841B (de) | 1962-03-01 | 1965-10-22 | Schaltungsanordnung zur Auswertung des Schleifenzustandes und zur Unterscheidung vonSchleifenwiderstaenden einer Fernmelde-, insbesondere Fernsprechleitung |
| DEST25275A DE1301373B (de) | 1962-03-01 | 1966-04-23 | Schaltungsanordnung zur Auswertung des Schleifenzustandes und zur Unterscheidung von Schleifenwiderstaenden einer Fernmelde-, insbesondere Fernsprechleitung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB982220A true GB982220A (en) | 1965-02-03 |
Family
ID=27561697
Family Applications (6)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7267/63A Expired GB982220A (en) | 1962-03-01 | 1963-02-22 | Asymmetrical d.c.-signalling method |
| GB3146/64A Expired GB1043643A (en) | 1962-03-01 | 1964-01-24 | Asymmetrical d.c. signalling system over two-wire telecommunication, particularly telephone lines |
| GB20430/65A Expired GB1086775A (en) | 1962-03-01 | 1965-05-14 | An electrical signalling system using asymmetrical direct current signalling for use in telephone exchange systems |
| GB27101/66A Expired GB1135785A (en) | 1962-03-01 | 1966-06-17 | Circuit arrangement for the loop supervision and for discerning loop resistances |
| GB45945/66A Expired GB1150594A (en) | 1962-03-01 | 1966-10-14 | Circuit Arrangement to Supervise the Loop Resistance of a Telecommunication, particularly Telephone Line |
| GB18479/67A Expired GB1135786A (en) | 1962-03-01 | 1967-04-21 | Telephone exchange loop supervision |
Family Applications After (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3146/64A Expired GB1043643A (en) | 1962-03-01 | 1964-01-24 | Asymmetrical d.c. signalling system over two-wire telecommunication, particularly telephone lines |
| GB20430/65A Expired GB1086775A (en) | 1962-03-01 | 1965-05-14 | An electrical signalling system using asymmetrical direct current signalling for use in telephone exchange systems |
| GB27101/66A Expired GB1135785A (en) | 1962-03-01 | 1966-06-17 | Circuit arrangement for the loop supervision and for discerning loop resistances |
| GB45945/66A Expired GB1150594A (en) | 1962-03-01 | 1966-10-14 | Circuit Arrangement to Supervise the Loop Resistance of a Telecommunication, particularly Telephone Line |
| GB18479/67A Expired GB1135786A (en) | 1962-03-01 | 1967-04-21 | Telephone exchange loop supervision |
Country Status (8)
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1287162B (de) * | 1964-08-17 | 1969-01-16 | Int Standard Electric Corp | Verfahren und Schaltungsanordnung zur Waehlziffernuebertragung ueber eine zwei Fernsprechzentralen verbindende zweiadrige Verbindungsleitung |
| DE1762897B2 (de) * | 1968-09-19 | 1971-06-03 | Standard Elektrik Lorenz AG, 7000 Stutt gart | Schaltungsanordnung zur auswertung des schleifenzustandes und zur unterscheidung von schleifenwiderstaenden in einer fernmelde insbesondere fernsprechleitung |
| FR2036211A5 (US20090158533A1-20090625-C00001.png) * | 1969-03-06 | 1970-12-24 | Cit Alcatel | |
| GB1290723A (US20090158533A1-20090625-C00001.png) * | 1969-10-02 | 1972-09-27 | ||
| US3778555A (en) * | 1971-07-19 | 1973-12-11 | Digital Telephone Systems Inc | Telephone subscriber line system intra call apparatus and method |
| US3740486A (en) * | 1971-12-01 | 1973-06-19 | Bell Telephone Labor Inc | Telephone subscriber line dial pulse detector circuit |
| US3889073A (en) * | 1974-03-06 | 1975-06-10 | Bell Telephone Labor Inc | Detection of series-resonant circuits connected across transmission paths |
| US3939308A (en) * | 1974-09-27 | 1976-02-17 | Gte Automatic Electric (Canada) Limited | Electronic side of line detector |
| DE2547880C2 (de) * | 1975-10-25 | 1981-09-24 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Schaltungsanordnung zur Erkennung von Betriebszuständen einer Teilnehmerleitung und zur Rufanschaltung sowie Rufabschaltung in Fernsprechvermittlungsanlagen |
| US4007335A (en) * | 1975-11-12 | 1977-02-08 | Bell Telephone Laboratories, Incorporated | Telephone line battery feed circuit |
| US4084214A (en) * | 1976-05-13 | 1978-04-11 | Ebco Industries, Ltd. | Modular housing for electronic apparatus |
| NL7807961A (nl) * | 1978-07-27 | 1980-01-29 | Bell Telephone Mfg | Impedantienetwerk en bewakingsketen voor een telecommu- nicatielynlus, welke dit netwerk gebruikt. |
| NL7904429A (nl) * | 1979-06-06 | 1980-12-09 | Philips Nv | Stroomdetectie-inrichting voor een automatische telefooncentrale. |
| US4292473A (en) * | 1979-08-06 | 1981-09-29 | International Standard Electric Corporation | Loop supervision circuit |
| US4359609A (en) * | 1980-06-20 | 1982-11-16 | Advanced Micro Devices, Inc. | Circuit with feedback for controlling the impedance thereof |
| DE3036685C2 (de) * | 1980-09-29 | 1985-10-03 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Indikation des Teilnehmerschleifenschlusses als Folge eines Rufs |
| US4454477A (en) * | 1982-04-28 | 1984-06-12 | At&T Bell Laboratories | Loop current detector with threshold setting impedance |
| US4514595A (en) * | 1982-06-10 | 1985-04-30 | Northern Telecom Limited | Active impedance line feed circuit |
| US4567328A (en) * | 1984-05-23 | 1986-01-28 | Burroughs Corp. | Energy detection circuit for a facsimile system controller |
| US4581487A (en) * | 1984-07-11 | 1986-04-08 | Itt Corporation | Universal DC feed for telephone line and trunk circuits |
| US10500979B1 (en) * | 2017-06-30 | 2019-12-10 | Suljo Pirija | Charging system utilizing excess grid electricity |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2278410A (en) * | 1940-10-08 | 1942-04-07 | Bell Telephone Labor Inc | Telephone system |
| US2306087A (en) * | 1941-06-19 | 1942-12-22 | Bell Telephone Labor Inc | Key pulsing register circuit |
| US2364771A (en) * | 1942-05-28 | 1944-12-12 | Bell Telephone Labor Inc | Telephone signaling system |
| US2400148A (en) * | 1943-06-23 | 1946-05-14 | Bell Telephone Labor Inc | Telephone call transmitting device |
| US2495725A (en) * | 1945-06-18 | 1950-01-31 | Standard Telephones Cables Ltd | Pulse correcting repeater |
| NL81447C (US20090158533A1-20090625-C00001.png) * | 1950-11-21 | |||
| US2823263A (en) * | 1953-03-30 | 1958-02-11 | Nederlanden Staat | Line circuit in a signalling system |
| BE536017A (US20090158533A1-20090625-C00001.png) * | 1954-02-26 | |||
| US2895012A (en) * | 1957-05-28 | 1959-07-14 | Gen Telephone Lab Inc | All trunk busy detection circuit |
| GB873523A (en) * | 1958-07-04 | 1961-07-26 | Ass Elect Ind | Improvements relating to potential testing circuits |
| US3129289A (en) * | 1959-06-26 | 1964-04-14 | Itt | Electronic line circuit |
| US3156778A (en) * | 1959-12-24 | 1964-11-10 | Bell Telephone Labor Inc | Supervisory circuits for telephone subscriber's line |
| DE1112755B (de) * | 1960-09-27 | 1961-08-17 | Arnstadt Fernmeldewerk | Schaltungsanordnung fuer Teilnehmer-schaltungen in elektronisch gesteuerten Fernsprechanlagen |
| BE754235A (fr) * | 1969-08-05 | 1970-12-31 | Western Electric Co | Circuit de supervision pour lignes telephoniques |
-
0
- NL NL289634D patent/NL289634A/xx unknown
- NL NL294136D patent/NL294136A/xx unknown
- BE BE624790D patent/BE624790A/xx unknown
- BE BE633291D patent/BE633291A/xx unknown
- BE BE629064D patent/BE629064A/xx unknown
-
1962
- 1962-03-01 DE DEST18913A patent/DE1160902B/de active Pending
-
1963
- 1963-01-31 DE DEST20241A patent/DE1173544B/de active Pending
- 1963-02-22 GB GB7267/63A patent/GB982220A/en not_active Expired
- 1963-02-27 US US261267A patent/US3243516A/en not_active Expired - Lifetime
- 1963-03-01 CH CH264263A patent/CH411053A/de unknown
-
1964
- 1964-01-21 US US339230A patent/US3330914A/en not_active Expired - Lifetime
- 1964-01-24 GB GB3146/64A patent/GB1043643A/en not_active Expired
- 1964-01-29 CH CH101664A patent/CH416755A/de unknown
- 1964-01-31 BE BE643215D patent/BE643215A/xx unknown
- 1964-05-21 DE DEST22144A patent/DE1217460B/de active Pending
-
1965
- 1965-05-06 BE BE663512D patent/BE663512A/xx unknown
- 1965-05-14 GB GB20430/65A patent/GB1086775A/en not_active Expired
- 1965-05-18 CH CH693165A patent/CH434381A/de unknown
- 1965-05-20 NL NL6506403A patent/NL6506403A/xx unknown
- 1965-06-19 DE DEST24001A patent/DE1293873B/de active Pending
- 1965-10-20 DE DEST24536A patent/DE1278551B/de not_active Withdrawn
- 1965-10-22 DE DEST24545A patent/DE1301841B/de active Pending
-
1966
- 1966-04-23 DE DEST25275A patent/DE1301373B/de not_active Withdrawn
- 1966-06-07 US US555913A patent/US3525816A/en not_active Expired - Lifetime
- 1966-06-10 AT AT556166A patent/AT289211B/de not_active IP Right Cessation
- 1966-06-16 NL NL6608420A patent/NL6608420A/xx unknown
- 1966-06-17 GB GB27101/66A patent/GB1135785A/en not_active Expired
- 1966-06-17 BE BE682672D patent/BE682672A/xx not_active Expired
- 1966-10-13 US US586526A patent/US3515809A/en not_active Expired - Lifetime
- 1966-10-14 GB GB45945/66A patent/GB1150594A/en not_active Expired
- 1966-10-19 NL NL6614684A patent/NL6614684A/xx unknown
- 1966-10-19 SE SE14172/66A patent/SE335368B/xx unknown
- 1966-10-20 BE BE688530D patent/BE688530A/xx unknown
- 1966-10-21 NL NL6614863A patent/NL6614863A/xx unknown
- 1966-10-24 BE BE688760D patent/BE688760A/xx unknown
-
1967
- 1967-02-16 AT AT151667A patent/AT299330B/de not_active IP Right Cessation
- 1967-04-20 US US632312A patent/US3546392A/en not_active Expired - Lifetime
- 1967-04-20 SE SE05519/67A patent/SE358535B/xx unknown
- 1967-04-21 GB GB18479/67A patent/GB1135786A/en not_active Expired
- 1967-04-21 CH CH574367A patent/CH471510A/de not_active IP Right Cessation
- 1967-04-21 NL NL6705711.A patent/NL160135C/xx active
- 1967-04-24 BE BE697422D patent/BE697422A/xx unknown
-
1970
- 1970-06-02 US US00042763A patent/US3748395A/en not_active Expired - Lifetime
Also Published As
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