Direct station selection hold arrangement
US4001517A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1975 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Nov 3, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/60
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A key telephone system is disclosed in which a direct station selection (DSS) arrangement reduces the number of operations required for the attendant to extend an incoming central office call to a station. The operation of one or more DSS keys on any of the attendant consoles in the key telephone system automatically places the calling central office line on hold and establishes a communication path through the DSS key contacts from the attendant to the selected station. DC bias on this communication path activates a loudspeaker and microphone arrangement in the selected station so the called party may converse with the attendant "hands-free." Additionally, the DSS arrangement provides the capability of utilizing any station in the key telephone system as the attendant position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.