JPS4964312A - - Google Patents
Info
- Publication number
- JPS4964312A JPS4964312A JP48069102A JP6910273A JPS4964312A JP S4964312 A JPS4964312 A JP S4964312A JP 48069102 A JP48069102 A JP 48069102A JP 6910273 A JP6910273 A JP 6910273A JP S4964312 A JPS4964312 A JP S4964312A
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US263945A US3917908A (en) | 1972-06-19 | 1972-06-19 | Call concentrator with expanded intracall capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4964312A true JPS4964312A (ja) | 1974-06-21 |
Family
ID=23003915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48069102A Pending JPS4964312A (ja) | 1972-06-19 | 1973-06-19 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3917908A (ja) |
| JP (1) | JPS4964312A (ja) |
| CA (1) | CA1009350A (ja) |
| DE (1) | DE2331259A1 (ja) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4230913A (en) * | 1979-01-04 | 1980-10-28 | Eltra Corporation | Line concentrator |
| US4394756A (en) * | 1980-09-12 | 1983-07-19 | Bell Telephone Laboratories, Incorporated | Generation of busy signals in a digital concentrator |
| EP0241228B1 (en) * | 1986-04-05 | 1992-10-21 | Nec Corporation | Multiple access communication system having loop-check circuitry for switching intraoffice connections |
| US4833708A (en) * | 1987-11-19 | 1989-05-23 | Remote Switch Systems, Inc. | Remote cable pair cross-connect system |
| JP2655412B2 (ja) * | 1988-03-11 | 1997-09-17 | 日本電気株式会社 | 時分割多重無線通信システムにおける子局内相互通話の通話監視方式 |
| US5682423A (en) * | 1990-07-25 | 1997-10-28 | Gpt Limited | Electrical power and telephone ringer signal distribution system |
| US6385315B1 (en) * | 1998-06-05 | 2002-05-07 | Mphase Corporation | Video voice separation system |
| US6944191B2 (en) * | 2000-12-21 | 2005-09-13 | Santera Systems, Inc. | Method of optimizing equipment utilization in telecommunication access network |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3047665A (en) * | 1958-03-28 | 1962-07-31 | Bell Telephone Labor Inc | Traffic recorder |
| US3121197A (en) * | 1960-03-08 | 1964-02-11 | Bell Telephone Labor Inc | Voice-frequency binary data transmission system with return signal |
| US3217109A (en) * | 1961-12-26 | 1965-11-09 | Bell Telephone Labor Inc | Distributed telephone switching system |
| US3250859A (en) * | 1962-12-31 | 1966-05-10 | American Telephone & Telegraph | Universal line concentrator |
| US3778555A (en) * | 1971-07-19 | 1973-12-11 | Digital Telephone Systems Inc | Telephone subscriber line system intra call apparatus and method |
-
1972
- 1972-06-19 US US263945A patent/US3917908A/en not_active Expired - Lifetime
-
1973
- 1973-06-18 CA CA174,242A patent/CA1009350A/en not_active Expired
- 1973-06-19 JP JP48069102A patent/JPS4964312A/ja active Pending
- 1973-06-19 DE DE2331259A patent/DE2331259A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CA1009350A (en) | 1977-04-26 |
| US3917908A (en) | 1975-11-04 |
| DE2331259A1 (de) | 1974-01-24 |