Key telephone system and method of setting operating data in the key telephone system
US4491693A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1982 |
| Grant date | Jan 1, 1985 |
| Priority date | — |
| Expiry date | Nov 26, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/007
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
This system is a key telephone system of a type setting operating data for controlling the operations of respective key telephone sets and the entire system by using the keys of the key telephone sets. This key telephone system has a plurality of key telephone sets and a main unit, and the main unit has first and second memories for storing the operating data. The main unit takes the first mode for operating the system in accordance with the operating data of the first memory and the second mode for setting the operating data. The second memory stores the reference operating data and transfers the data into the first memory as required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.