Time-division switching telephone exchange comprising a service signal sender
US4178483A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1977 |
| Grant date | Dec 11, 1979 |
| Priority date | — |
| Expiry date | Sep 29, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a device for sending a plurality of categories of signalling data over time-multiplexed channels, said device consisting of groups of circuits assigned to various categories of data wherein the inputs of each circuit are connected via a first common bus to the outputs of a clock circuit feeding time reference signals to the various channels, wherein the outputs of each circuit are connected via a second common bus to an output circuit. These groups of circuits are provided with a memory circuit for containing said data and a time reference signal decoding circuit for controlling the reading of the memory circuit for transmission of said data to a telephone exchange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.