CH549318A - ELECTRONIC CIRCUIT ARRANGEMENT FOR DISCONNECTING THE VOICE CIRCUIT OF A TELEPHONE SET DURING THE TRANSMISSION OF THE NUMBERS. - Google Patents
ELECTRONIC CIRCUIT ARRANGEMENT FOR DISCONNECTING THE VOICE CIRCUIT OF A TELEPHONE SET DURING THE TRANSMISSION OF THE NUMBERS.Info
- Publication number
- CH549318A CH549318A CH1467372A CH1467372A CH549318A CH 549318 A CH549318 A CH 549318A CH 1467372 A CH1467372 A CH 1467372A CH 1467372 A CH1467372 A CH 1467372A CH 549318 A CH549318 A CH 549318A
- Authority
- CH
- Switzerland
- Prior art keywords
- disconnecting
- numbers
- transmission
- telephone set
- set during
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1266571 | 1971-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH549318A true CH549318A (en) | 1974-05-15 |
Family
ID=20296106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1467372A CH549318A (en) | 1971-10-07 | 1972-10-06 | ELECTRONIC CIRCUIT ARRANGEMENT FOR DISCONNECTING THE VOICE CIRCUIT OF A TELEPHONE SET DURING THE TRANSMISSION OF THE NUMBERS. |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH549318A (en) |
FR (1) | FR2155666A5 (en) |
IT (1) | IT968706B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2906579B1 (en) * | 1979-02-21 | 1980-07-17 | Licentia Gmbh | Circuit arrangement for switching from sound-frequency signal delivery to speech mode and vice versa in telecommunications devices |
-
1972
- 1972-10-06 IT IT3019072A patent/IT968706B/en active
- 1972-10-06 CH CH1467372A patent/CH549318A/en not_active IP Right Cessation
- 1972-10-06 FR FR7235608A patent/FR2155666A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT968706B (en) | 1974-03-20 |
FR2155666A5 (en) | 1973-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |