GB822297A - Improvements in or relating to electrical switching circuits - Google Patents
Improvements in or relating to electrical switching circuitsInfo
- Publication number
- GB822297A GB822297A GB1739556A GB1739556A GB822297A GB 822297 A GB822297 A GB 822297A GB 1739556 A GB1739556 A GB 1739556A GB 1739556 A GB1739556 A GB 1739556A GB 822297 A GB822297 A GB 822297A
- Authority
- GB
- United Kingdom
- Prior art keywords
- time
- gate
- pulse
- highway
- line
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/20—Time-division multiplex systems using resonant transfer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
822,297. Automatic exchange systems. STANDARD TELEPHONES & CABLES Ltd. May 31, 1957 [June 5, 1956], No. 17395/56. Class 40 (4). To effect a connection between subscribers allocated different time channels in a pulse multiplex system the information represented by the modulation of a pulse train of one time channel is stored and then read out to form a modulated pulse train of the other time channel. Storage may be effected by means of capacitors or ferro-magnetic cores. As shown in Fig. 1, speech signals on a line A are repeatedly connected to a time division multiplex highway MH at one time position by a gate GA in coincidence with the connection of a capacitor CS to the highway by a gate GS over inductors L1 and L2. A capacitor CA terminates the line A and with inductors L1, L2, and capacitor CS forms a circuit with a time constant such that the charge on CA is completely discharged into CS during the time gates GA, GS, are open. At a second time position gates GB and GS are repeatedly opened so that the charge on CS is discharged into capacitor CB of a low-pass filter which terminates line B and reconstitutes the speech from line A. If the circuits CA, L1, L2, CS, and CB, L1, L2, CS, are each symmetrical the arrangement transmits speech in both directions. Additional storage capacitors CS1 and gates GS1 may be connected to accommodate further connections over the highway, each connection involving the seizure of a free storage capacitor. As shown in Fig. 3, the invention is applied to an exchange, such as described in Specification 765,681, to interconnect groups of subscribers P to V. Each group is served by a multiplex highway such as H1 or H2 and each highway can be connected to another over links LP to LV by gates such as 3G4, 3G5, and storage capacitors CP to CV. If line x of group P is to be connected to line y of group V, a free time channel is seized in highway H1 and gate 3G1 is repeatedly opened at this time. In response to digits dialled by the calling subscriber gate 3G4 is also repeatedly opened at this time to connect line x to the link LV associated with the group V. A free time channel is seized in the highway H2 of group V and thereafter gates 3G5 and 3G7 are opened repeatedly thereafter at that time. Gate 3G6 associated with storage capacitor CV serving the link LV is repeatedly opened at both channel times, being thereby alternately connected to lines x and y. A number of capacitors may serve each link. The gates in both Figs. 1 and 3 may be symmetrical junction transistors controlled from stores recording the identity and seized time positions of the calling and called lines. Fig. 5 shows a ferromagnetic storage core which may replace the storage capacitors. Assuming the core is at maximum remanence a speech-modulated pulse on terminal 51X is applied over gate 51G during a time interval PG1 to set the core in accordance with the energy of the pulse. During a later time interval PF3 a gate 52G is opened in coincidence with the opening of a gate 53G and the application of a read-out pulse from terminal 54X to reset the core. The modulated pulse is thereby regenerated and passed to terminal 52X. Transmission of modulated pulses in both directions between terminals 51X, 52X, can be achieved by resetting the core during an initial part of the interval PG1 by means of a pulse on terminal 53X and setting it during a latter part. The core is then reset during an initial part of the interval PF3 and set by a pulse on terminal 54X during the latter part. Specifications 644,570 and 780,831 also are referred to.
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL217706D NL217706A (en) | 1956-06-05 | ||
NL217828D NL217828A (en) | 1956-06-05 | ||
BE558096D BE558096A (en) | 1956-06-05 | ||
BE558097D BE558097A (en) | 1956-06-05 | ||
GB1739656A GB847234A (en) | 1956-06-05 | 1956-06-05 | Improvements in or relating to time division multiplex circuits |
GB1739556A GB822297A (en) | 1956-06-05 | 1956-06-05 | Improvements in or relating to electrical switching circuits |
AU27456/57A AU215909B2 (en) | 1956-06-05 | 1957-05-02 | Improvements in or relating to electrical switching circuits |
DEI13303A DE1114228B (en) | 1956-06-05 | 1957-06-04 | Circuit arrangement for a self-dialing switching device operated in a time multiple in telecommunications, in particular telephone systems |
FR740188A FR74036E (en) | 1956-06-05 | 1957-06-04 | Telecommunication system |
CH4691957A CH364808A (en) | 1956-06-05 | 1957-06-05 | Electrical switchgear for the transmission of pulses from one time slot to another |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1739556A GB822297A (en) | 1956-06-05 | 1956-06-05 | Improvements in or relating to electrical switching circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB822297A true GB822297A (en) | 1959-10-21 |
Family
ID=10094450
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1739656A Expired GB847234A (en) | 1956-06-05 | 1956-06-05 | Improvements in or relating to time division multiplex circuits |
GB1739556A Expired GB822297A (en) | 1956-06-05 | 1956-06-05 | Improvements in or relating to electrical switching circuits |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1739656A Expired GB847234A (en) | 1956-06-05 | 1956-06-05 | Improvements in or relating to time division multiplex circuits |
Country Status (7)
Country | Link |
---|---|
AU (1) | AU215909B2 (en) |
BE (2) | BE558097A (en) |
CH (1) | CH364808A (en) |
DE (1) | DE1114228B (en) |
FR (1) | FR74036E (en) |
GB (2) | GB847234A (en) |
NL (2) | NL217828A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1171962B (en) * | 1961-06-29 | 1964-06-11 | Siemens Ag | Circuit arrangement for time division multiplex telecommunications, in particular telephone switching systems |
DE1187277B (en) * | 1961-06-29 | 1965-02-18 | Siemens Ag | Circuit arrangement for time division multiplex telecommunications, in particular telephone switching systems |
DE1230091B (en) * | 1960-04-27 | 1966-12-08 | Western Electric Co | Time division multiplex switching arrangement in telecommunications systems, in particular telephone exchanges |
US3535457A (en) * | 1965-05-19 | 1970-10-20 | Siemens Ag | Time division multiplex system provided with bandwith multiplication feature |
US3573381A (en) * | 1969-03-26 | 1971-04-06 | Bell Telephone Labor Inc | Time division switching system |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL244502A (en) * | 1959-10-20 | |||
NL273561A (en) * | 1961-01-20 | |||
GB957252A (en) * | 1961-10-14 | 1964-05-06 | Nippon Electric Co | A multiplex telephone switching system |
GB1052827A (en) * | 1963-04-29 | |||
DE1226660B (en) * | 1963-04-29 | 1966-10-13 | Siemens Ag | Circuit arrangement for the pulsed transmission of messages in time-division multiplex telecommunications, in particular telephone switching systems |
GB1052828A (en) * | 1963-04-29 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL163817B (en) * | 1949-10-26 | Huels Chemische Werke Ag | PROCESS FOR PREPARATION OF PREPARATIONS CONTAINING POLYBUTENE-1 AND A FILLER. | |
BE516057A (en) * | 1951-12-07 | |||
DE920492C (en) * | 1952-03-12 | 1954-11-22 | Siemens Ag | Circuit arrangement for practically simultaneous transmission of several messages over a common connection path, in particular in telephone systems |
-
0
- BE BE558096D patent/BE558096A/xx unknown
- NL NL217706D patent/NL217706A/xx unknown
- NL NL217828D patent/NL217828A/xx unknown
- BE BE558097D patent/BE558097A/xx unknown
-
1956
- 1956-06-05 GB GB1739656A patent/GB847234A/en not_active Expired
- 1956-06-05 GB GB1739556A patent/GB822297A/en not_active Expired
-
1957
- 1957-05-02 AU AU27456/57A patent/AU215909B2/en not_active Expired
- 1957-06-04 DE DEI13303A patent/DE1114228B/en active Pending
- 1957-06-04 FR FR740188A patent/FR74036E/en not_active Expired
- 1957-06-05 CH CH4691957A patent/CH364808A/en unknown
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1230091B (en) * | 1960-04-27 | 1966-12-08 | Western Electric Co | Time division multiplex switching arrangement in telecommunications systems, in particular telephone exchanges |
DE1171962B (en) * | 1961-06-29 | 1964-06-11 | Siemens Ag | Circuit arrangement for time division multiplex telecommunications, in particular telephone switching systems |
DE1187277B (en) * | 1961-06-29 | 1965-02-18 | Siemens Ag | Circuit arrangement for time division multiplex telecommunications, in particular telephone switching systems |
US3251943A (en) * | 1961-06-29 | 1966-05-17 | Siemens Ag | Circuit arrangement constructed in the manner of a coupling multiple for the connection of time multiplex telephone systems |
US3251944A (en) * | 1961-06-29 | 1966-05-17 | Siemens Ag | Circuit arrangement constructed in the manner of a coupling multiplex for the connection of time division multiplex telephone systems |
US3535457A (en) * | 1965-05-19 | 1970-10-20 | Siemens Ag | Time division multiplex system provided with bandwith multiplication feature |
US3573381A (en) * | 1969-03-26 | 1971-04-06 | Bell Telephone Labor Inc | Time division switching system |
Also Published As
Publication number | Publication date |
---|---|
GB847234A (en) | 1960-09-07 |
NL217828A (en) | |
BE558096A (en) | |
CH364808A (en) | 1962-10-15 |
FR74036E (en) | 1960-11-07 |
DE1114228B (en) | 1961-09-28 |
AU215909B2 (en) | 1958-07-02 |
NL217706A (en) | |
BE558097A (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2936338A (en) | Switching circuit | |
GB822297A (en) | Improvements in or relating to electrical switching circuits | |
US2936337A (en) | Switching circuit | |
US3129293A (en) | Automatic telecommunication switching systems | |
NO124698B (en) | ||
GB945386A (en) | ||
GB1444603A (en) | Time division communication systems | |
US3435417A (en) | Electronic switching system | |
US2580093A (en) | Call data recording telephone system | |
US3347989A (en) | Stock quotation switching system utilizing switching means for alternating the connection of a register and its associated trunk | |
US2999130A (en) | Circuit arrangement for line identification | |
US2916557A (en) | Universal line concentrator | |
US1568039A (en) | Telephone-exchange system | |
US2025880A (en) | Telephone system | |
US3666892A (en) | Speech gate | |
US3532976A (en) | Fault detecting and correcting circuitry for crosspoint networks | |
US4188509A (en) | Tone signalling arrangement for a telecommunications exchange | |
US2892893A (en) | Drop-back telephone selector | |
US3086083A (en) | Switching circuit | |
US3113183A (en) | Switching circuit | |
US2876286A (en) | Arrangement for the identification of special service apparatus required for connections in a telecommunication system | |
US3111560A (en) | Line circuit | |
US2102137A (en) | Telephone system | |
US1569936A (en) | Machine-switching system | |
Joel Jr | An experimental remote controlled line concentrator |