GB1258211A - - Google Patents
Info
- Publication number
- GB1258211A GB1258211A GB1258211DA GB1258211A GB 1258211 A GB1258211 A GB 1258211A GB 1258211D A GB1258211D A GB 1258211DA GB 1258211 A GB1258211 A GB 1258211A
- Authority
- GB
- United Kingdom
- Prior art keywords
- loop
- receiver
- discriminator
- voltage
- zone
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR6906319A FR2036211A5 (US20020128544A1-20020912-P00008.png) | 1969-03-06 | 1969-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1258211A true GB1258211A (US20020128544A1-20020912-P00008.png) | 1971-12-22 |
Family
ID=9030232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1258211D Expired GB1258211A (US20020128544A1-20020912-P00008.png) | 1969-03-06 | 1970-03-06 |
Country Status (8)
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE629064A (US20020128544A1-20020912-P00008.png) * | 1962-03-01 |
-
1969
- 1969-03-06 FR FR6906319A patent/FR2036211A5/fr not_active Expired
-
1970
- 1970-02-26 BE BE746538D patent/BE746538A/xx unknown
- 1970-03-02 LU LU60431D patent/LU60431A1/xx unknown
- 1970-03-02 CH CH299870A patent/CH528192A/fr not_active IP Right Cessation
- 1970-03-06 US US17208A patent/US3657484A/en not_active Expired - Lifetime
- 1970-03-06 DE DE19702010727 patent/DE2010727A1/de active Pending
- 1970-03-06 GB GB1258211D patent/GB1258211A/en not_active Expired
- 1970-03-06 NL NL7003213A patent/NL7003213A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2010727A1 (de) | 1970-09-24 |
| CH528192A (fr) | 1972-09-15 |
| LU60431A1 (US20020128544A1-20020912-P00008.png) | 1970-09-11 |
| BE746538A (fr) | 1970-08-26 |
| NL7003213A (US20020128544A1-20020912-P00008.png) | 1970-09-08 |
| FR2036211A5 (US20020128544A1-20020912-P00008.png) | 1970-12-24 |
| US3657484A (en) | 1972-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4188508A (en) | Telephone call restricting apparatus | |
| JPS635304Y2 (US20020128544A1-20020912-P00008.png) | ||
| EP0041262B1 (en) | Programmable telephone-traffic measuring equipment | |
| DE59109177D1 (de) | Empfangsgerät für digitale Funksignale | |
| GB1040254A (en) | Improvements in and relating to time division communication systems | |
| US2892037A (en) | Electrical information system | |
| US4002837A (en) | Transceiver | |
| GB1258211A (US20020128544A1-20020912-P00008.png) | ||
| GB1436117A (en) | Interrogation of remote stations | |
| US3935391A (en) | Time division multiplex switching system | |
| US4075564A (en) | Selective calling arrangement | |
| US3999013A (en) | Bi-directional signaling apparatus | |
| CA1078969A (en) | Method and apparatus for transfer of asynchronously altering data words | |
| US3588366A (en) | Signaling circuitry for time-sharing telecommunication system | |
| US3536839A (en) | Answer tone detection circuit | |
| US3417210A (en) | Condition testing arrangement | |
| US3959598A (en) | Identification forwarding circuit for use with tone-to-pulse converters | |
| US2977420A (en) | Telephone subscriber's supervisory circuits | |
| US2548345A (en) | Telemetric system | |
| US3941937A (en) | Dial pulse receiver | |
| RU1554749C (ru) | Устройство дл оценки состо ни каналов в симплексных системах св зи | |
| US2826648A (en) | Pulse analyzer circuit | |
| US3529092A (en) | Line circuit | |
| US3886319A (en) | Exchange switching system | |
| GB1230692A (US20020128544A1-20020912-P00008.png) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |