GB542176A - Improvements in or relating to telecommunication exchange systems - Google Patents
Improvements in or relating to telecommunication exchange systemsInfo
- Publication number
- GB542176A GB542176A GB11004/40A GB1100440A GB542176A GB 542176 A GB542176 A GB 542176A GB 11004/40 A GB11004/40 A GB 11004/40A GB 1100440 A GB1100440 A GB 1100440A GB 542176 A GB542176 A GB 542176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- relays
- register
- calls
- switch
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
- H04M3/51—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing
- H04M3/523—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing with call distribution or queueing
Landscapes
- Business, Economics & Management (AREA)
- Marketing (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB271787X | 1940-06-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB542176A true GB542176A (en) | 1941-12-30 |
Family
ID=10255463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11004/40A Expired GB542176A (en) | 1940-06-28 | 1940-06-28 | Improvements in or relating to telecommunication exchange systems |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE476275A (fr) |
CH (1) | CH271787A (fr) |
FR (1) | FR947565A (fr) |
GB (1) | GB542176A (fr) |
-
0
- BE BE476275D patent/BE476275A/xx unknown
-
1940
- 1940-06-28 GB GB11004/40A patent/GB542176A/en not_active Expired
-
1947
- 1947-03-19 CH CH271787D patent/CH271787A/fr unknown
- 1947-06-05 FR FR947565D patent/FR947565A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH271787A (fr) | 1950-11-15 |
FR947565A (fr) | 1949-07-06 |
BE476275A (fr) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3780227A (en) | Telephone call answering and allotting transfer system | |
US2922847A (en) | Distributing system | |
GB527836A (en) | Improvements in or relating to testing electrical circuits | |
GB542176A (en) | Improvements in or relating to telecommunication exchange systems | |
US3478174A (en) | Call distributing circuit utilizing sequential activation of station ringers | |
US2520130A (en) | Night switching for private automatic branch exchanges | |
US2826640A (en) | Permanent signal lock-out | |
US3258539A (en) | Electronic switching telephone system | |
US3176078A (en) | Automatic telecommunication switching systems | |
US3275754A (en) | Call distributing circuit | |
US1944269A (en) | Telephone system | |
GB588563A (en) | Improvements in or relating to telephone systems | |
US2530103A (en) | Circuit for identifying the trunk connected to an operator's position | |
US2716674A (en) | Identifications of line permanents | |
US2658110A (en) | Party line selective signaling system having code and conference call | |
US2734946A (en) | Mercer | |
US2668194A (en) | Finder-allotter circuit for telephone systems | |
GB617932A (en) | Improvements in telephone switching systems | |
US2519287A (en) | Multiunit calling group control circuit for preventing overload of current at switchboards | |
US3251948A (en) | Disconnect circuit for remote line concentrator | |
US1487361A (en) | Machine-switching telephone-exchange system | |
US2395798A (en) | Traffic control system | |
US1381530A (en) | Telephone-exchange system | |
US2817714A (en) | Indicating systems | |
US1729851A (en) | Telephone system |