Circuit for handling conversation data in a distributed processing telex exchange
US4291196A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Nov 6, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A circuit for the systematic handling of conversation data from a calling party to a called party for use in a distributed processing telex exchange is disclosed. The customer terminations connected to the exchange are divided into a predetermined number of groups of terminations having a predetermined number of terminations in each group. Associated with each group of terminations is a frame memory which has memory capacity for storing a single bit of conversation data from every termination connected to the exchange. Associated with each frame memory is a vector memory which has a memory location associated with each termination in a group. Each vector memory location contains a frame memory address that addresses the location in frame memory containing the conversation data to be forwarded down to the termination associated with the current vector memory address. In addition, each vector memory location contains an active bit which is included with the conversation data forwarded to the called party termination to indicate that a call is in progress for that termination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.