Communications systems

US6978007B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Gerald Hofer · Diez, DE
• Peter Caldera · Villach, AT
• Paul Kunisch · Puchheim, DE

Key dates

• Filing date: Sep 3, 1999
• Grant date: Dec 20, 2005
• Expiry date: Sep 3, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M3/40
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The communications system has a transmission network for transmitting useful data and control data. Call numbers are input at a subscriber terminal. A subscriber line unit with an adjustable transmission characteristic is connected between the subscriber terminal and the transmission network. A recognition unit connected to the transmission network recognizes particular call number patterns and outputs particular control signals corresponding to call number patterns. A control unit connected between the recognition unit and the subscriber line unit sets the transmission characteristic of the subscriber line unit depending on the control signals provided by the recognition unit.