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Method for safeguarding call charge data of telephone exchange

A technology of telephone exchange and billing data, which is applied to the redundancy in operation for data error detection, electrical digital data processing, telephone communication, etc., can solve problems such as loss of billing data, and achieve the effect of large load reduction

Inactive Publication Date: 2004-04-21
NOKIA SIEMENS NETWORKS GMBH & CO KG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since billing data is usually extracted from periodically changing files, there is a danger that billing data will be lost due to overwriting in the case of long backup times

Method used

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  • Method for safeguarding call charge data of telephone exchange
  • Method for safeguarding call charge data of telephone exchange

Examples

Experimental program
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Embodiment Construction

[0011] The figure schematically shows a disk storage PSP, two magnetic tape storages MBS A, MBS B as sequential mass storage. The memory is located in or near a telephone exchange (not shown) with a plurality of subscribers, in which a large amount of billing data is generated. Typically more than 100 megabytes of billing data per day are written to the disk storage (fixed disk) and are located there in data blocks of, for example, 14 kilobytes.

[0012] In order to generate two protection copies of the billing data on tape, the invention provides that the backup process is started on the basis of the start signal STS and that the first data block DB1 is read from the disk storage PSP. This data block is provided with a write command for the first tape storage MBS A or a write command for the second tape storage MBS B and is sent to the tape storage MBS A, MBS B in the data block DBS 1A, DBS1B . After this write order is finished, produce feedback signal RM 1A, RM 1B by tape...

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Abstract

The invention relates to a method for safeguarding call charge data of a telephone exchange stored in a disc storage (PSP). According to the inventive method, individual data blocks (DB 1, DB 2,...) are read by the disc storage and are sent with the write orders to two sequential mass storages (MBS A, MBS B), e.g. magnetic tape storages, said mass storages being independent of one another. At each time, a data block (DB 1) read by the disc storage (PSP) is sent together with a write order both to the first and to the second mass storage (MBS A, MBS B) or is sent to another mass storage. After the arrival of an acknowledgement (RM 1A, RM 1B,...) the next data block (DB2) read by the disc storage is sent together with write orders to both mass storages both on the part of the first (MBS A) mass storage as well as on the part of the second (MBS B) mass storage.

Description

technical field [0001] The invention relates to a method for protecting charging data temporarily stored in a disk memory of a telephone exchange, wherein individual data blocks are read from the disk memory and sent together with a write command to two mutual Independent, time-sequenced mass memory. Background technique [0002] In large telephone exchanges with many subscriber terminals, billing data can generate large data volumes, typically well over 100 megabytes per day. Since the billing information must be reprocessed quickly in order to settle with the user at any time, and because the billing data has very important economic significance, it is necessary to temporarily store the data in a sequential large-capacity memory intermittently. Especially in tape storage. For security reasons, the accounting data must be stored on two mutually independent tape storages, so that two copies of the accounting data remain in the end. [0003] At present, in order to realize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/00H04M15/00
CPCH04M15/74H04M15/00H04M2215/709H04M2215/0164H04M15/41
Inventor H·基特尔M·瓦卢克
Owner NOKIA SIEMENS NETWORKS GMBH & CO KG
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