Protocol for transmitting messages in a network
US5274696A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Apr 5, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M7/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for transmitting voice signals, including user names--alphabetic and/or spoken, and data messages, including network addresses, among sites of a network of store-and-forward messaging system sites using telephone lines. A preferred embodiment of the method for transmitting data messages and voice signals between sending and receiving store-and-forward messaging sites of the network of messaging systems connected by one or more telephone lines includes the steps of: (a) placing a telephone call form the sending site to the receiving site to a predetermined telephone number over one of the telephone lines; (b) connecting data transmission and reception apparatus to the telephone line at the sending and receiving sites; (c) exchanging predetermined control commands and data messages using the data apparatus at the two sites, the commands specifying a communications procedure; (d) disabling the data apparatus from exchanging control commands and data messages and connecting voice transmission and reception apparatus to the telephone line at the two sites; (e) transmitting voice signals between the two sites using the voice apparatus; (f) enabling the data apparatus for exchang…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.