GB1242291A - Improvements in or relating to data exchange systems - Google Patents
Improvements in or relating to data exchange systemsInfo
- Publication number
- GB1242291A GB1242291A GB1805969A GB1805969A GB1242291A GB 1242291 A GB1242291 A GB 1242291A GB 1805969 A GB1805969 A GB 1805969A GB 1805969 A GB1805969 A GB 1805969A GB 1242291 A GB1242291 A GB 1242291A
- Authority
- GB
- United Kingdom
- Prior art keywords
- channel
- channels
- information
- signal
- group
- 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
- 230000005540 biological transmission Effects 0.000 abstract 3
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Communication Control (AREA)
- Time-Division Multiplex Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
1,242,291. Digital transmission systems. SIEMENS A.G. 9 April, 1969 [10 April, 1968], No. 18059/69. Addition to 1,210,733. Heading H4P. In a digital transmission system employing transparent transmission and comprising a programmed exchange, and in which duration significant signals, such as calling signals, are transmitted in a code form which is not duration significant, the coded control signals are transmitted over a channel common to a group of information channels, which is assigned to one or more of these information channels as required for a limited time. Each control signal is accompanied by a signal indicating the information channel to which it is relevant. Allotting the control signal channel to a seized information channel is initiated by a signal sent to the exchange by the subscriber and the channel may remain allotted until the information channel is released. The control channel may be common to one or more groups of channels or there may be several control channels to each group. A counter at the exchange determines the number of transparent information channels in use in a group of channels, and an engaged signal is sent to any subscriber requesting a transparent channel when a preset number is exceeded.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH539668A CH493181A (en) | 1968-04-10 | 1968-04-10 | Process for the formation and transmission of signaling criteria in data switching systems with transparent message transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1242291A true GB1242291A (en) | 1971-08-11 |
Family
ID=4292864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1805969A Expired GB1242291A (en) | 1968-04-10 | 1969-04-09 | Improvements in or relating to data exchange systems |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE731331A (en) |
| CH (1) | CH493181A (en) |
| FR (1) | FR96196E (en) |
| GB (1) | GB1242291A (en) |
| SE (1) | SE365926B (en) |
-
0
- FR FR96196D patent/FR96196E/fr not_active Expired
-
1968
- 1968-04-10 CH CH539668A patent/CH493181A/en not_active IP Right Cessation
-
1969
- 1969-01-24 SE SE96669A patent/SE365926B/xx unknown
- 1969-04-09 GB GB1805969A patent/GB1242291A/en not_active Expired
- 1969-04-10 BE BE731331D patent/BE731331A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR96196E (en) | 1972-05-19 |
| DE1918089A1 (en) | 1969-10-23 |
| DE1918089B2 (en) | 1977-03-17 |
| BE731331A (en) | 1969-10-10 |
| SE365926B (en) | 1974-04-01 |
| CH493181A (en) | 1970-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1093575A (en) | Improvements in and relating to arrangements for ciphering and deciphering information in pulse form | |
| ES419529A1 (en) | Wired broadcasting systems | |
| GB1001903A (en) | Improvements in or relating to automatic telecommunication exchanges | |
| GB1243874A (en) | Improvements in or relating to signalling systems | |
| GB1242291A (en) | Improvements in or relating to data exchange systems | |
| GB1204087A (en) | Improvements in or relating to digital data transmission systems | |
| GB967643A (en) | Improvements in or relating to digital message transmission systems | |
| GB1034514A (en) | Improvements in or relating to telecommunications systems exchanges | |
| GB1210733A (en) | Improvements in and relating to data exchange systems | |
| GB1252325A (en) | ||
| CA918793A (en) | Automatic telecommunications exchange systems | |
| GB1164976A (en) | Improvements in or relating to Time-Division Multiplex Data Exchange Systems. | |
| GB1322445A (en) | Data exchange systems | |
| JPS52120709A (en) | Common line signal system | |
| CA782006A (en) | Control system for telephone signalling transmission | |
| AU280920B2 (en) | Common control automatic telephone exchange system | |
| GB996835A (en) | Multi-frequency code signalling method | |
| AU3571663A (en) | Common control automatic telephone exchange system | |
| JPS53138617A (en) | Time division channel system | |
| AU2768263A (en) | Transmission control in signalling system | |
| GB1074038A (en) | Improvements in or relating to telecommunications exchange systems | |
| AU270728B2 (en) | Improvements relating top. b. x. final selector arrangements in automatic telephone exchange systems | |
| CA692497A (en) | Signalling methods between subscribers' sets and exchange | |
| JPS56122550A (en) | Data switching system for time division circuit | |
| DK123900B (en) | Transmission station for pulse code modulated time division multiplex signals or computer controlled telephone system comprising such a transmission station. |