Telecommunity alarm system with a plurality of security surveillance modems

US5939980A · kind A · utility

Assignee

• DEUTSCHE TELEKOM AG · DE

Inventors

• Gunter Heitmann
• Andreas Albrecht · Pirk, DE
• Ralf-Thilo Schulz · Putzbrunn, DE
• Matthias Wendt · Neu-Anspach, DE
• Wolfgang Schumacher · Preetz, DE

Key dates

• Filing date: Mar 20, 1997
• Grant date: Aug 17, 1999
• Expiry date: Mar 20, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G08B27/006
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A telecommunity alarm system having a plurality of security surveillance modems that can be connected to a telecommunication network via an analog or digital subscriber terminal port, the security surveillance modems forming a group of a predetermined size. The security surveillance modems each have a first memory for storing telephone numbers of the other modems in the group, a second memory for identifying the particular modem and a programmable control unit. The modems are designed to dial automatically, in the event of an alarm, the other security surveillance modems belonging to the group and signal the alarm status.