Process and system for automatic routing

US6285879A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Gerhard Lechner · Leverkusen, DE
• Helmut Rau · Germering, DE
• Eckard Schottle · Krailing, DE
• Dirk Weiler · Germering, DE

Key dates

• Filing date: Jan 15, 1999
• Grant date: Sep 4, 2001
• Expiry date: Jan 15, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q2213/13384
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In accord therewith, at least one identification number (PIID) for identifying a private network (PISN) for access to a first private branch exchange (PBX1) to a subscriber (BS) who was registered and a mobile subscriber telephone number (MSISDN) that was sent into the public mobile radio telephone network (PLMN), is stored in the public mobile radio telephone network (PLMN). A routing number (PRIN) is offered in the mobile radio telephone network on the basis of the incoming mobile subscriber telephone number (MSISDN) and is checked with reference to the stored identification number (PIID) as to whether the call destination lies in the area of a private branch exchange (PBX2) of the same private network (PISN) to which the first private branch exchange (PBX1) belongs. When this is the case, routing information (RIN) that define the call destination are sent--after clear down of the call in the public mobile radio telephone network--to the first private branch exchange (PBX1) that subsequently sets up the connection to the call destination in the private network (PISN) on the basis of the received routing information (RIN).