GB970179A - Improvements relating to digital transmission systems - Google Patents

Improvements relating to digital transmission systems

Info

Publication number
GB970179A
GB970179A GB35675/62A GB3567562A GB970179A GB 970179 A GB970179 A GB 970179A GB 35675/62 A GB35675/62 A GB 35675/62A GB 3567562 A GB3567562 A GB 3567562A GB 970179 A GB970179 A GB 970179A
Authority
GB
United Kingdom
Prior art keywords
block
station
field station
bit
field
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
Application number
GB35675/62A
Inventor
Ronald Mitford Foulkes
Geoffrey 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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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.)
Filing date
Publication date
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB35675/62A priority Critical patent/GB970179A/en
Priority to DEA44069A priority patent/DE1256302B/en
Publication of GB970179A publication Critical patent/GB970179A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/14—Calling by using pulses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L7/00—Remote control of local operating means for points, signals, or trackmounted scotch-blocks
    • B61L7/06—Remote control of local operating means for points, signals, or trackmounted scotch-blocks using electrical transmission
    • B61L7/08—Circuitry
    • B61L7/088—Common line wire control using series of coded pulses

Abstract

970,179. Electric selective signalling systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 12,1963 [Sept. 19,1962], No. 35675/62. Heading G4H. In a field station system a central station cyclically calls upon each field station in turn to transmit indications of the states of switches thereat and while such indications are being transmitted back to the central station the central station can call and transmit control signals to any field station whatever its position in the cyclic sequence. A complete scanning cycle comprises a plurality of field station cycles-one per field station-each of which comprises Fig.1 eight blocks B1 to B8 each comprising eight bit periods p1 to p8. The data transmitted in each cycle by the central station is as follows:- B1 (block 1): the identity of the field station that is being called to transmit its indications; B2: the identity of the field station which is to respond to control signals; B3: the inverse of B1 for checking purposes; B4-B8: con- trol signals. Thus in every cycle block 1 is used but the other blocks are only used when it is desired to transmit controls. The second bit in block 1 is a sync bit and every eighth bit in every block is a parity bit for the block. The central station comprises Fig. 2 an oscillator and counter producing bit p1 to p8 and block B1 to B8 clockpulses, a counter C stepped at B1, p1 time for sequentially calling the field station, and a switch SS for selecting a field station to which control signals set on contacts CS are transmitted. At the field station Fig. 4 called to transmit its indications by block 1 from the central station, the first block is received RX, staticised, and recognized DIC, thereby initiating the transmission back to the central station of indication signals as to the state of various contacts at the field station. These signals are shown in Fig. 3. Block 1 is empty because it corresponds to the period when the call is transmitted. At the field station which is called for control purposes (assuming that one is so called) the cell in block 2 is recognized and verified by block 3 by a circuit D.C.C. which causes the subsequent blocks 4 to 8 to be registered R4 to R8 to effect the required controls.
GB35675/62A 1962-09-19 1962-09-19 Improvements relating to digital transmission systems Expired GB970179A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB35675/62A GB970179A (en) 1962-09-19 1962-09-19 Improvements relating to digital transmission systems
DEA44069A DE1256302B (en) 1962-09-19 1963-09-18 Digital multi-channel telecontrol process between a control center and any number of control panels to be controlled

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB35675/62A GB970179A (en) 1962-09-19 1962-09-19 Improvements relating to digital transmission systems
GB1256302X 1962-09-19

Publications (1)

Publication Number Publication Date
GB970179A true GB970179A (en) 1964-09-16

Family

ID=66428816

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35675/62A Expired GB970179A (en) 1962-09-19 1962-09-19 Improvements relating to digital transmission systems

Country Status (2)

Country Link
DE (1) DE1256302B (en)
GB (1) GB970179A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2215344A1 (en) * 1973-01-29 1974-08-23 Ericsson Telefon Ab L M
FR2417423A1 (en) * 1978-02-16 1979-09-14 Ericsson Telefon Ab L M SAFETY DEVICE FOR RAILWAY INTERLOCKING CENTER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2215344A1 (en) * 1973-01-29 1974-08-23 Ericsson Telefon Ab L M
FR2417423A1 (en) * 1978-02-16 1979-09-14 Ericsson Telefon Ab L M SAFETY DEVICE FOR RAILWAY INTERLOCKING CENTER

Also Published As

Publication number Publication date
DE1256302B (en) 1967-12-14

Similar Documents

Publication Publication Date Title
GB796317A (en) Direction-sensitive binary code position control system
US3187099A (en) Master-slave memory controlled switching among a plurality of tdm highways
US3694582A (en) Circuit arrangement for supervising the coded output information of a translator in telecommunication systems and particularly telephone systems
US2973507A (en) Call recognition system
US3374309A (en) Duplex way station selector
GB869942A (en) Electrical selective calling system
US3204043A (en) High speed electronic switching telephone system
GB1007643A (en) A system for setting a plurality of movable elements step by step
US3007136A (en) Non-resetting allotter device
GB970179A (en) Improvements relating to digital transmission systems
GB928742A (en) Improvements in or relating to circuit arrangements for controlling switching matrices
GB746743A (en) Improvements in and relating to electric pulse signalling systems
GB1243874A (en) Improvements in or relating to signalling systems
US3226679A (en) Electronic selective ringing decoder system
US2932005A (en) Electronic switching system common control equipment
GB1403602A (en) Data processing systems
US3558828A (en) Electronic scanners
GB1473898A (en) Data transmission systems
US3914558A (en) Circuit arrangement for multiple frequency code character receivers in telecommunication systems
US3529090A (en) Scanning equipment
GB987293A (en) Electrical communication apparatus
GB1063404A (en) Code transmitter for asymmetrical direct current signalling via two-wire telecommunication particularly telephone lines
GB1222890A (en) Electronically controlled telephone switching system
GB1350111A (en) Telecommunications exchange systems
GB869396A (en) Improvements in or relating to electrical remote supervisory apparatus