Circuit arrangement for telecommunications systems, particularly telephone switching systems, comprising information interrogating devices cyclically driving inquiry locations

US4811014A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventor

• Herbert Jans · Schwanau, DE

Key dates

• Filing date: Jul 28, 1986
• Grant date: Mar 7, 1989
• Expiry date: Jul 28, 2006

Classification

• Technology area (CPC G): Physics
• CPC primary: G11C8/04
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An interrogating device cyclically calling in information from various inquiry locations selects the various inquiry locations a different number of times, for which purpose addresses of the inquiry location are stored a different number of times in an interrogation control memory. When an interrogating device is not supplied with any information when an inquiry location is interrogated, the inquiry location is skipped the next time. To this end, when no information is received given selection of an inquiry location with its address, that memory location where the same address is again stored is first sought in the memory and a note bit is stored there. The memory location immediately following the previously-selected memory location is then sought in the memory and the appertaining, next inquiry location is selection with the address read. The note bit effects that the inquiry location which is interrogatable with the appertaining address is not interrogated once; the note bit is then erased.