NL146543A - - Google Patents
Info
- Publication number
- NL146543A NL146543A NL146543DA NL146543A NL 146543 A NL146543 A NL 146543A NL 146543D A NL146543D A NL 146543DA NL 146543 A NL146543 A NL 146543A
- Authority
- NL
- Netherlands
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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Coils Or Transformers For Communication (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE495684T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL146543A true NL146543A (en) |
Family
ID=3870699
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL146543D NL146543A (en) | |||
| NL84988D NL84988C (en) |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL84988D NL84988C (en) |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE495684A (en) |
| NL (2) | NL84988C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8006518A (en) * | 1980-12-01 | 1982-07-01 | Philips Nv | CONFERENCE SYSTEM FOR TELEPHONY. |
-
0
- NL NL146543D patent/NL146543A/xx unknown
- BE BE495684D patent/BE495684A/nl unknown
- NL NL84988D patent/NL84988C/xx active
Also Published As
| Publication number | Publication date |
|---|---|
| BE495684A (en) | |
| NL84988C (en) | 1900-01-01 |
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| BE495684A (en) | ||
| DE19524425A1 (en) | Echo cancellation method esp. in terminal equipment - using designated service number for independent speakers when dialling, if there is no echo canceller in equipment and so controls echo canceller in digital exchange |