System (IWF) for the bidirectional connection of an ELAN and a CLS wide-area network

US6205490A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stefan Karapetkov · Munich, DE
• Ingrid Fromm · Munich, DE
• Bernhard Petri · Hersbruck, DE

Key dates

• Filing date: Dec 22, 1997
• Grant date: Mar 20, 2001
• Expiry date: Dec 22, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2012/5645
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

System for the bidirectional connection of an ELAN and a CLS wide-area network (CLSnet) having an address memory for allocated MAC addresses of the ELAN (ELAN 1, . . . ) and E.164 addresses of the CLS network (CLSnet), having a memory for an E.164 address allocated to the transition to the CLS network (CLSnet), and having a controller in order, dependent on specific conditions, to handover frames coming from the ELAN to the interface to the CLS network in common with the E.164 address belonging to the destination MAC address or, respectively, to discard them, whereby frames having a local broadcast MAC address as destination address are always to be discarded, and in order to hand frames coming from the wide-area network over to the interface to the ELAN.