PT74762B - Conference circuit for switching telephone exchanges of numerical type - Google Patents
Conference circuit for switching telephone exchanges of numerical typeInfo
- Publication number
- PT74762B PT74762B PT74762A PT7476282A PT74762B PT 74762 B PT74762 B PT 74762B PT 74762 A PT74762 A PT 74762A PT 7476282 A PT7476282 A PT 7476282A PT 74762 B PT74762 B PT 74762B
- Authority
- PT
- Portugal
- Prior art keywords
- telephone exchanges
- conference circuit
- switching telephone
- numerical type
- numerical
- Prior art date
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
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
- H04M3/569—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants using the instant speaker's algorithm
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Time-Division Multiplex Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8121227A IT1211024B (en) | 1981-04-16 | 1981-04-16 | CONFERENCE CIRCUIT FOR NUMERIC TYPE TELEPHONE SWITCHING UNITS. |
Publications (2)
Publication Number | Publication Date |
---|---|
PT74762A PT74762A (en) | 1982-05-01 |
PT74762B true PT74762B (en) | 1983-11-30 |
Family
ID=11178683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PT74762A PT74762B (en) | 1981-04-16 | 1982-04-15 | Conference circuit for switching telephone exchanges of numerical type |
Country Status (9)
Country | Link |
---|---|
BR (1) | BR8202162A (en) |
DE (1) | DE3214099A1 (en) |
ES (1) | ES511385A0 (en) |
FR (1) | FR2504333A1 (en) |
GB (1) | GB2100094A (en) |
GR (1) | GR76042B (en) |
IT (1) | IT1211024B (en) |
PT (1) | PT74762B (en) |
YU (1) | YU80382A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2183965A (en) * | 1985-12-10 | 1987-06-10 | Weng Pu San | Circuit structure of teleconference |
JPH03166894A (en) * | 1989-11-27 | 1991-07-18 | Matsushita Electric Ind Co Ltd | Key telephone system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4190744A (en) * | 1978-06-05 | 1980-02-26 | Siemens Aktiengesellschaft | Circuit arrangement and process for producing conference connections between three conference parties in a PCM time multiplex switching system |
US4224688A (en) * | 1978-10-30 | 1980-09-23 | Northern Telecom Limited | Digital conference circuit |
DE3005739C2 (en) * | 1980-02-15 | 1988-11-10 | Nixdorf Computer Ag, 4790 Paderborn | Method for controlling the transmission of PCM signals between connection points of a PCM time division multiplex telecommunications network in a conference operation and circuit arrangement for carrying out the method |
-
1981
- 1981-04-16 IT IT8121227A patent/IT1211024B/en active
-
1982
- 1982-04-06 GR GR67823A patent/GR76042B/el unknown
- 1982-04-13 YU YU00803/82A patent/YU80382A/en unknown
- 1982-04-13 ES ES511385A patent/ES511385A0/en active Granted
- 1982-04-15 FR FR8206512A patent/FR2504333A1/fr not_active Withdrawn
- 1982-04-15 BR BR8202162A patent/BR8202162A/en unknown
- 1982-04-15 PT PT74762A patent/PT74762B/en unknown
- 1982-04-16 GB GB8211154A patent/GB2100094A/en not_active Withdrawn
- 1982-04-16 DE DE19823214099 patent/DE3214099A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR2504333A1 (en) | 1982-10-22 |
BR8202162A (en) | 1983-03-29 |
YU80382A (en) | 1985-03-20 |
PT74762A (en) | 1982-05-01 |
GB2100094A (en) | 1982-12-15 |
ES8303858A1 (en) | 1983-03-01 |
GR76042B (en) | 1984-08-03 |
IT8121227A0 (en) | 1981-04-16 |
DE3214099A1 (en) | 1982-11-18 |
IT1211024B (en) | 1989-09-29 |
ES511385A0 (en) | 1983-03-01 |
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