Special service signal tester
US4741016A · kind A · utility
3Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Nov 3, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a unitary and hand held four conductor test apparatus that is designed to provide signaling operation tests on new or existing telecommunication special service circuits. The apparatus is comprised of circuitry which interconnects LEDs, a switching element and connection terminals. The apparatus terminates PBX dial tie trunk or special service circuit signaling leads at a designated "demarcation point" and it is designed to exercise or manipulate the special service circuit's associated line equipment for testing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.