JPS50120505A - - Google Patents
Info
- Publication number
- JPS50120505A JPS50120505A JP50022359A JP2235975A JPS50120505A JP S50120505 A JPS50120505 A JP S50120505A JP 50022359 A JP50022359 A JP 50022359A JP 2235975 A JP2235975 A JP 2235975A JP S50120505 A JPS50120505 A JP S50120505A
- Authority
- JP
- Japan
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/82—Line monitoring circuits for call progress or status discrimination
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7402575A NL7402575A (nl) | 1974-02-26 | 1974-02-26 | Elektronisch telefoontoestel. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS50120505A true JPS50120505A (https=) | 1975-09-20 |
| JPS5429326B2 JPS5429326B2 (https=) | 1979-09-22 |
Family
ID=19820839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2235975A Expired JPS5429326B2 (https=) | 1974-02-26 | 1975-02-22 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3973082A (https=) |
| JP (1) | JPS5429326B2 (https=) |
| BE (1) | BE825894A (https=) |
| CA (1) | CA1017087A (https=) |
| DE (1) | DE2505957C3 (https=) |
| DK (1) | DK142827B (https=) |
| FR (1) | FR2262455A1 (https=) |
| GB (1) | GB1454157A (https=) |
| NL (1) | NL7402575A (https=) |
| SE (1) | SE392557B (https=) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2057815B (en) * | 1979-08-31 | 1983-08-10 | Standard Telephones Cables Ltd | Electronic telephone circuit |
| NL7907276A (nl) * | 1979-10-01 | 1981-04-03 | Philips Nv | Spanningsstabilisator geschikt voor toepassing in een telefoontoestel. |
| NL7907275A (nl) * | 1979-10-01 | 1981-04-03 | Philips Nv | Spanningsstabilisator geschikt voor een telefoon- toestel. |
| GB2065418B (en) * | 1979-12-06 | 1984-02-15 | Standard Telephones Cables Ltd | Telephone line feed |
| US4332984A (en) * | 1979-12-13 | 1982-06-01 | Bell Telephone Laboratories, Incorporated | Active speech network circuit for a telephone set |
| FR2484749B1 (fr) * | 1980-06-16 | 1987-10-30 | Cit Alcatel | Dispositif d'alimentation en energie electrique d'un equipement pouvant prendre deux etats correspondant a des consommations differentes |
| CA1157175A (en) * | 1981-02-20 | 1983-11-15 | Mitel Corporation | Power saving line circuit |
| NL8103419A (nl) * | 1981-04-01 | 1982-11-01 | Philips Nv | Lijntestcircuit voor een abonneetelefoontoestel. |
| FR2519218A1 (fr) * | 1981-12-24 | 1983-07-01 | Telecommunications Sa | Procede et dispositif d'alimentation d'une regie d'abonne |
| DE3513625A1 (de) * | 1985-04-16 | 1986-10-23 | Nixdorf Computer Ag, 4790 Paderborn | Schaltungsanordnung fuer die fernspeisung von teilnehmeranschluss-endgeraeten in fernmeldeanlagen |
| JP2845181B2 (ja) * | 1995-09-22 | 1999-01-13 | 日本電気株式会社 | 加入者回路 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3035122A (en) * | 1958-09-30 | 1962-05-15 | Gen Dynamics Corp | Constant current line circuitt for loop telephone lines |
| FR2038463A5 (https=) * | 1969-03-12 | 1971-01-08 | Person Jean | |
| CA930488A (en) * | 1971-08-27 | 1973-07-17 | Microsystems International Limited | Power supply |
-
1974
- 1974-02-26 NL NL7402575A patent/NL7402575A/xx not_active Application Discontinuation
-
1975
- 1975-02-11 US US05/548,997 patent/US3973082A/en not_active Expired - Lifetime
- 1975-02-13 DE DE2505957A patent/DE2505957C3/de not_active Expired
- 1975-02-21 GB GB735675A patent/GB1454157A/en not_active Expired
- 1975-02-21 CA CA220,566A patent/CA1017087A/en not_active Expired
- 1975-02-21 DK DK67875AA patent/DK142827B/da unknown
- 1975-02-22 JP JP2235975A patent/JPS5429326B2/ja not_active Expired
- 1975-02-24 SE SE7502006A patent/SE392557B/xx unknown
- 1975-02-24 BE BE153666A patent/BE825894A/xx unknown
- 1975-02-26 FR FR7506017A patent/FR2262455A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BE825894A (fr) | 1975-08-25 |
| DE2505957C3 (de) | 1981-02-12 |
| SE392557B (sv) | 1977-03-28 |
| DE2505957A1 (de) | 1975-08-28 |
| DK67875A (https=) | 1975-10-27 |
| SE7502006L (https=) | 1975-08-27 |
| DK142827C (https=) | 1981-09-07 |
| US3973082A (en) | 1976-08-03 |
| CA1017087A (en) | 1977-09-06 |
| DE2505957B2 (de) | 1980-06-04 |
| FR2262455A1 (https=) | 1975-09-19 |
| JPS5429326B2 (https=) | 1979-09-22 |
| GB1454157A (en) | 1976-10-27 |
| DK142827B (da) | 1981-02-02 |
| NL7402575A (nl) | 1975-08-28 |