GB1164954A - Improvements in or relating to Electric Circuit Arrangements for Identifying Marked Feeder Lines in Telecommunications Exchange Systems. - Google Patents
Improvements in or relating to Electric Circuit Arrangements for Identifying Marked Feeder Lines in Telecommunications Exchange Systems.Info
- Publication number
- GB1164954A GB1164954A GB1716568A GB1716568A GB1164954A GB 1164954 A GB1164954 A GB 1164954A GB 1716568 A GB1716568 A GB 1716568A GB 1716568 A GB1716568 A GB 1716568A GB 1164954 A GB1164954 A GB 1164954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gate
- cascade
- marked
- output
- hundreds
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/50—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication
- H04L12/52—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication using time division techniques
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Bus Control (AREA)
Abstract
1,164,954. Automatic exchange systems. SIEMENS A.G. 10 April, 1968 [12 April, 1967], No. 17165/68. Heading H4K. An electronic line finder comprises a cascade of stages each of which comprises two OR-NOR gates which are so interconnected that if a marking denoting a calling line is present on one of the gates when a stepping potential occurs on the other gate then the output of the latter is inhibited so as to prevent further stepping and an output signal indicative of the stage and hence of the identity of the line associated therewith is given. The finder is of particular use in a code-multiple telegraph exchange. When a large number of subscribers are involved, a separate cascade is provided for each digit position of the line's number. Operation.-The two gates referred to above have the references 1b(-6b) and 1c(-6c) in the hundreds, tens and units cascades. A start potential from central control is applied to terminal F and used to set bi-stable iE provided that none of the units gates 1b-6b is marked (this will be so if a hundreds and tens identification has not taken place). Normally the output from iE then sets iZ so that hunting can take place in the hundreds cascade. If in the latter, gate 2b say, is marked then the hunting potential injected by NOR gate f is stopped by gate 2c and an output signal is provided by 2d. A selector device (not shown) then causes one of the tens stages to be marked and the output from the marked hundreds stage is used inter alia to reset iZ and to start hunting in the tens cascade (via NOR gate e). A process similar to that in the hundreds cascade takes place and finally yet another similar sequence of events occurs in the units cascade. In the latter an output from the marked output gate 1d(-6d) is applied via NOR gate h to central control to denote the end of hunting.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1967S0109295 DE1287600B (en) | 1967-04-12 | 1967-04-12 | Circuit arrangement for identifying marked feeder lines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1164954A true GB1164954A (en) | 1969-09-24 |
Family
ID=7529413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1716568A Expired GB1164954A (en) | 1967-04-12 | 1968-04-10 | Improvements in or relating to Electric Circuit Arrangements for Identifying Marked Feeder Lines in Telecommunications Exchange Systems. |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE713669A (en) |
CH (1) | CH483175A (en) |
DE (1) | DE1287600B (en) |
FR (1) | FR1565765A (en) |
GB (1) | GB1164954A (en) |
NL (1) | NL6805115A (en) |
SE (1) | SE354401B (en) |
-
1967
- 1967-04-12 DE DE1967S0109295 patent/DE1287600B/en not_active Withdrawn
-
1968
- 1968-03-12 CH CH364468A patent/CH483175A/en not_active IP Right Cessation
- 1968-04-09 FR FR1565765D patent/FR1565765A/fr not_active Expired
- 1968-04-10 SE SE484468A patent/SE354401B/xx unknown
- 1968-04-10 GB GB1716568A patent/GB1164954A/en not_active Expired
- 1968-04-10 NL NL6805115A patent/NL6805115A/xx unknown
- 1968-04-12 BE BE713669D patent/BE713669A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6805115A (en) | 1968-10-14 |
FR1565765A (en) | 1969-05-02 |
SE354401B (en) | 1973-03-05 |
CH483175A (en) | 1969-12-15 |
BE713669A (en) | 1968-10-14 |
DE1287600B (en) | 1969-01-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |