DE3890881T1 - TEST UNIT FOR TESTING TELEPHONE LINES - Google Patents
TEST UNIT FOR TESTING TELEPHONE LINESInfo
- Publication number
- DE3890881T1 DE3890881T1 DE19883890881 DE3890881T DE3890881T1 DE 3890881 T1 DE3890881 T1 DE 3890881T1 DE 19883890881 DE19883890881 DE 19883890881 DE 3890881 T DE3890881 T DE 3890881T DE 3890881 T1 DE3890881 T1 DE 3890881T1
- Authority
- DE
- Germany
- Prior art keywords
- test unit
- telephone lines
- testing telephone
- testing
- lines
- Prior art date
- 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.)
- Withdrawn
Links
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/109,164 US4841560A (en) | 1987-10-16 | 1987-10-16 | Direct access test unit for central office |
PCT/US1988/003445 WO1989003622A1 (en) | 1987-10-16 | 1988-10-07 | Direct access test unit for central office |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3890881T1 true DE3890881T1 (en) | 1989-12-21 |
Family
ID=26777878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19883890881 Withdrawn DE3890881T1 (en) | 1987-10-16 | 1988-10-07 | TEST UNIT FOR TESTING TELEPHONE LINES |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3890881T1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3512787C1 (en) * | 1985-04-10 | 1986-08-21 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Method for testing telephone sets, routes and parts of the control of telephone switching systems, in particular telephone private branch exchanges |
US4639557A (en) * | 1985-09-27 | 1987-01-27 | Communications Technology Corporation | Remote testing system for electrical circuits |
US4670898A (en) * | 1986-01-03 | 1987-06-02 | Harris Corporation | Direct access test unit for central office |
-
1988
- 1988-10-07 DE DE19883890881 patent/DE3890881T1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3512787C1 (en) * | 1985-04-10 | 1986-08-21 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Method for testing telephone sets, routes and parts of the control of telephone switching systems, in particular telephone private branch exchanges |
US4639557A (en) * | 1985-09-27 | 1987-01-27 | Communications Technology Corporation | Remote testing system for electrical circuits |
US4670898A (en) * | 1986-01-03 | 1987-06-02 | Harris Corporation | Direct access test unit for central office |
Non-Patent Citations (1)
Title |
---|
telcom report 4 (1981) Beiheft "Digital- vermittlungssysteme" EWSD", S. 49-55 * |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8130 | Withdrawal |