Patent · US Expired

Digital message switching system

US5844904A · kind A · utility

1Cited by

4References

9Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Yousif Ammar · Hersbruck, DE
Gerald Hoefer · Untermeitingen, DE
Michael Alger-Meunier · Haar, DE

Key dates

Filing date	Aug 22, 1996
Grant date	Dec 1, 1998
Priority date	—
Expiry date	Aug 22, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH04Q2213/13383
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A digital message switching system includes at least one digital message switching unit and a plurality of subordinate units each being coupled to the respective switching unit through a respective transmission link. In order to signal a request of a subordinate unit to transmit, that unit first sends at least one message of meaningless content to a higher-ranking unit and only then sends messages of meaningful content.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.