Use of a tone bus to provide polling and data distribution apparatus for communication system terminal groups
US4584680A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1984 |
| Grant date | Apr 22, 1986 |
| Priority date | — |
| Expiry date | Mar 30, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/068
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A combined telecommunications and data communications system includes a digital switching network for allowing connections between one or more of a plurality of ports. The system described includes a tone module at one port which module includes a tone bus which can be connected to a plurality of other ports each associated with a terminal module. In the system a poll originating module is coupled to a given port of the switching network. The poll originating module can initiate a broadcast mode by transmitting a polling signal. Upon implementing the broadcast mode the switching network connects the polling originator module to the tone module. The tone module then transmits the polling signal during the broadcast mode to a plurality of ports. The polling request is decoded at each of the ports by means of a terminal interface module. In this manner each port will recognize a polling request and contain separate circuitry to respond to such a request through the switching network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.