Interface for simulating a telephone line connection between two devices for establishing a communication path between the devices
US5588047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1993 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Feb 2, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/323
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device for simulating a telephone line connection between a sending unit and a receiving unit, each said unit two devices, each device having a telephone line connector. The inventive device generates a tone signal corresponding to a telephone calling tone when the sending unit outputs a signal indicating a desire to transmit data. The tone signal lasts for a predetermined amount of time sufficient to inform the sending unit that it may begin transmission of the data. A direct communication path is automatically established between the sending and receiving units connected to the device. The sending and receiving units are continuously provided with a line voltage simulating a conventional telephone line voltage, thus maintaining the communication path in an active state during the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.