Local

US5774460A · kind A · utility

Assignee

• Krone Corporation · DE

Inventors

• Reinhard Schiffel · Berlin, DE
• Klaus Jackel · Berlin, DE
• Bruno Stadler · Berlin, DE
• Holger Vogel · Berlin, DE

Key dates

• Filing date: Jul 3, 1996
• Grant date: Jun 30, 1998
• Expiry date: Jul 3, 2016

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W84/14
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A local ISDN transmission system has a central base station and a number of subscriber radio terminals greater than the number of communication channels. The system is connectable to subscriber ports through an S.sub.0 wireless transmission interface and is responsive to an activation request from a subscriber radio terminal for opening any available and free communication channel for a communication. An intermediate generator in the base station and in each subscriber terminal divides an ISDN two-wire subscriber connection line between a line termination section and a network termination section communicating by radio transmission. The intermediate generator, upon the occurrence of an activation request by a subscriber terminal, allocates a communication channel within waiting and monitoring periods for the activation of the ISDN two-wire subscriber connecting line. A delay system delays the activation request by a delay period sufficient to switch the allocated communication channel and activate a radio system of the subscriber terminal.