NL286252A - - Google Patents
Info
- Publication number
- NL286252A NL286252A NL286252DA NL286252A NL 286252 A NL286252 A NL 286252A NL 286252D A NL286252D A NL 286252DA NL 286252 A NL286252 A NL 286252A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/006—Call diverting means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1240761 | 1961-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL286252A true NL286252A (xx) |
Family
ID=20295685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL286252D NL286252A (xx) | 1961-12-12 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3176082A (xx) |
| BE (1) | BE625550A (xx) |
| DE (1) | DE1166291B (xx) |
| GB (1) | GB959641A (xx) |
| NL (1) | NL286252A (xx) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3335231A (en) * | 1964-04-27 | 1967-08-08 | Bell Telephone Labor Inc | Switching system using momentary onhook signalling in answered trunk to detect abandoned call |
| US3341663A (en) * | 1964-04-29 | 1967-09-12 | Bell Telephone Labor Inc | Telephone answering system |
| US3519745A (en) * | 1966-10-18 | 1970-07-07 | Gen Alarm Corp | Selected pre-recorded telephonic message transmission system dialling plural pre-selected numbers and dialling a new number if the called number is busy or does not answer |
| US3515813A (en) * | 1968-01-04 | 1970-06-02 | Automatic Elect Lab | Telephone ringing signal transfer device |
| US3946146A (en) * | 1975-01-17 | 1976-03-23 | Gte Automatic Electric Laboratories Incorporated | Discrete ringing detector for use in key telephone systems |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB633520A (en) * | 1947-08-25 | 1949-12-19 | Ericsson Telephones Ltd | Improvements in or relating to telephone circuits |
| US2718560A (en) * | 1952-05-05 | 1955-09-20 | Ericsson Telefon Ab L M | Device for forwarding calling signals in telephone instruments |
-
0
- NL NL286252D patent/NL286252A/xx unknown
- BE BE625550D patent/BE625550A/xx unknown
-
1962
- 1962-11-09 US US236517A patent/US3176082A/en not_active Expired - Lifetime
- 1962-11-28 DE DET23090A patent/DE1166291B/de active Pending
- 1962-12-12 GB GB47017/62A patent/GB959641A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB959641A (en) | 1964-06-03 |
| DE1166291B (de) | 1964-03-26 |
| BE625550A (xx) | |
| US3176082A (en) | 1965-03-30 |