Testing communications systems
US4991196A · kind A · utility
22Cited by
1References
13Claims
0Family size
Inventor
Key dates
| Filing date | Jul 11, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jul 11, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Test apparatus for signalling systems having plural terminal units (26X) and line-pair connections (24X) therefor, comprises off-line test equipment (10) for parameters or conditions of said connections (24X), and connection means (30) of or for the test equipment (10) relative to said system. The connection means (30) comprising plural connectors (32X, 34X) as inputs for a number of said connections (24X) to said terminal units and multi-way switch means (40X) affording selection of said inputs (32X) one at a time for communication with other facilities of said off-line test equipment (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.