NO155598C - Signaleringskrets for telefonanlegg. - Google Patents
Signaleringskrets for telefonanlegg.Info
- Publication number
- NO155598C NO155598C NO811094A NO811094A NO155598C NO 155598 C NO155598 C NO 155598C NO 811094 A NO811094 A NO 811094A NO 811094 A NO811094 A NO 811094A NO 155598 C NO155598 C NO 155598C
- Authority
- NO
- Norway
- Prior art keywords
- ringing
- signal bus
- line
- lines
- group
- Prior art date
Links
Classifications
-
- 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
- H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13575680A | 1980-03-31 | 1980-03-31 |
Publications (3)
Publication Number | Publication Date |
---|---|
NO811094L NO811094L (no) | 1981-10-01 |
NO155598B NO155598B (no) | 1987-01-12 |
NO155598C true NO155598C (no) | 1987-04-22 |
Family
ID=22469517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO811094A NO155598C (no) | 1980-03-31 | 1981-03-31 | Signaleringskrets for telefonanlegg. |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0037540B1 (no) |
JP (1) | JPS56152361A (no) |
AT (1) | ATE17294T1 (no) |
AU (1) | AU541648B2 (no) |
BE (1) | BE888193A (no) |
BR (1) | BR8101844A (no) |
CA (1) | CA1172737A (no) |
DE (1) | DE3173346D1 (no) |
ES (1) | ES8206125A1 (no) |
MX (1) | MX150197A (no) |
NO (1) | NO155598C (no) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2128449B (en) * | 1982-10-08 | 1985-12-11 | Standard Telephones Cables Ltd | Tone generation circuit |
US4656659A (en) * | 1985-07-18 | 1987-04-07 | Itt Corporation | Programmable ring signal generator |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2129281A5 (no) * | 1971-03-11 | 1972-10-27 | Ibm France | |
US4097694A (en) * | 1975-07-09 | 1978-06-27 | Toa Electric Company, Ltd. | Time-division telephone system embodying trunks having demodulating-adder circuits |
JPS53124008A (en) * | 1977-04-06 | 1978-10-30 | Oki Electric Ind Co Ltd | Call signal transmission system |
-
1981
- 1981-03-26 MX MX186568A patent/MX150197A/es unknown
- 1981-03-26 AU AU68765/81A patent/AU541648B2/en not_active Ceased
- 1981-03-27 BR BR8101844A patent/BR8101844A/pt not_active IP Right Cessation
- 1981-03-28 EP EP81102363A patent/EP0037540B1/de not_active Expired
- 1981-03-28 DE DE8181102363T patent/DE3173346D1/de not_active Expired
- 1981-03-28 AT AT81102363T patent/ATE17294T1/de not_active IP Right Cessation
- 1981-03-30 CA CA000374135A patent/CA1172737A/en not_active Expired
- 1981-03-31 ES ES500922A patent/ES8206125A1/es not_active Expired
- 1981-03-31 BE BE2/59088A patent/BE888193A/nl not_active IP Right Cessation
- 1981-03-31 NO NO811094A patent/NO155598C/no unknown
- 1981-03-31 JP JP4658281A patent/JPS56152361A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
ES500922A0 (es) | 1982-08-16 |
AU541648B2 (en) | 1985-01-17 |
MX150197A (es) | 1984-03-29 |
AU6876581A (en) | 1981-10-08 |
BR8101844A (pt) | 1981-10-06 |
JPS56152361A (en) | 1981-11-25 |
EP0037540B1 (de) | 1986-01-02 |
DE3173346D1 (en) | 1986-02-13 |
EP0037540A2 (de) | 1981-10-14 |
CA1172737A (en) | 1984-08-14 |
BE888193A (nl) | 1981-09-30 |
ES8206125A1 (es) | 1982-08-16 |
ATE17294T1 (de) | 1986-01-15 |
EP0037540A3 (en) | 1982-09-15 |
NO811094L (no) | 1981-10-01 |
JPH0342534B2 (no) | 1991-06-27 |
NO155598B (no) | 1987-01-12 |
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