Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Reexamination Certificate
1998-10-29
2001-12-04
Matar, Ahmad (Department: 2642)
Telephonic communications
Plural exchange network or interconnection
With interexchange network routing
C379S207080, C379S219000, C379S221140
Reexamination Certificate
active
06327360
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an exchange. Particularly, the present invention relates to an office data management system that can be operated and managed in common by each of exchanges in a switching network. The present invention also is to provide a system for assigning personal numbers to subscribers. Moreover, the present invention relates to a same subscriber number migrating system where the same subscriber number can be used even if a subscriber is transferred to another exchange.
Conventionally, when a subscriber is accommodated in a different exchange, its area code and its subscriber number are changed. In the conventional open numbering plan made by area codes and subscriber numbers, where a subscriber is relocated a station with a different area code, its area code is necessarily changed, so that the same station cannot manage and operate plural area codes. Moreover, in the closed numbering system made by only subscriber numbers, the subscriber can be basically relocated with the same subscriber number. However, when subscriber numbers are accommodated at random, which station a subscriber is accommodated in cannot be specified if the subscriber number is checked up to the last digit. This system complicates the numbering plan. In the worst cases, a change in one subscriber may require changing the office data in all the exchanges within a network. This results in increased working costs. Hence, since large-scaled networks employ the open numbering plan or partially the closed numbering plan, it has been substantially impossible to migrate a subscriber with the same number. Moreover, since each exchange managing subscriber numbers manages its numbering plan, even one subscriber's relocation causes requires changing office data in two exchanges or more, thus causing troublesome tasks.
As described above, the conventional exchange involves in always changing the subscriber number when a subscriber is relocated to another exchange. Changes in the subscriber number make the company's business activity and private life very inconvenient. Recently, there have been strong demands for the necessity of personal telephone numbers. For that reason, a switching system is required such that can realize uses of personal telephone numbers and facilitate the operation and management.
The system where plural distributed node exchanges configures a network so as to operate as one exchange is proposed (refer to Japanese Patent Application (Tokugan-Hei) No. 11263/1997).
SUMMARY OF THE INVENTION
The objective of the present invention is to solve the above-mentioned tasks.
The objective of the present invention is to provide an office data management system that can control all exchanges in the above-mentioned distributed node switching system so as to operate as one exchange. In the switching system, all node exchanges must be operated and managed in a shared mode. Since the area origination code depends on area conditions under which the node is installed, each node must individually implement operation and management.
The objective of the present invention is to provide an office data management system which has two kinds of data including common office data operated and managed in common at respective nodes and individual office data individually operated and managed at respective nodes.
Moreover, the objective of the invention is to provide a subscriber's number assigning system wherein a telephone number is assigned to a subscriber, not to a telephone set.
Furthermore, the objective of the present invention is to provide a same number migrating system where a subscriber can use the same subscriber's number even if the subscriber is accommodated for another exchange, wherein correspondences between subscribers and telephone sets are changed in accordance with a maintenance operation procedure or by a subscriber itself.
Still further, the another objective of present invention is to provide a system for facilitating a maintenance operation procedure involved in changes in subscribers of plural exchanges.
The objective of the present invention is achieved by an office data management system comprising plural exchanges interconnected to configure a switching network; each of the plural exchanges including a main storage memory; the main storage memory containing individual office data and common office data, as office data such as numbering plan information and subscriber information necessary for switching process; the individual office data being individually operated and managed in each of the exchanges; the common office data being operated and managed in common by all the exchanges in the network.
In the office data management system, each of the exchanges comprises means for receiving and storing a selection signal dialed by a subscriber; and means for analyzing the stored selection signal according to the numbering plan information existing in the office data; and the stored selection signal is first collated with numbering plan information existing in the common office data; and a connection process is performed in accordance with the common numbering plan information when a corresponding number can be registered as common numbering plan information and is recognized as an extension, a B board, a call origination, a special service code, or the like in the network; and the corresponding number is collated with individual numbering plan information existing in the individual office data individually registered at each node when the corresponding number cannot be recognized; and a connection process is performed in accordance with the individual numbering plan when it can be recognized whether the corresponding number is an extension, a B board, a call origination, a special service code, or the like in an exchange accommodating an originator; and origination restriction is performed when the corresponding number cannot be recognized.
In the office data management, the common office data has means for issuing data registration and data changing instruction from a centralized maintenance I/O unit connected to a specific exchange in the network and thus batch registering and changing common office data in the main storage memory of all the exchanges within the network by means of broadcast transmission means via a line through which a call control signal and a maintenance signal are transmitted between exchanges; and the individual office data has means for registering and changing only individual office data in the main storage memory in an exchange by specifying an exchange having individual office data which are changed from the centralized maintenance I/O unit via a line through which the call control signal and the maintenance signal are communicated between exchanges and then issuing data registration and change instruction; and the individual office data comprises means for registering and changing only individual office data in the main storage memory in an exchange by issuing data registration and data changing instruction from a maintenance I/O unit connected to each exchange.
Furthermore, in the base data management system, the common office data comprises means for periodically checking whether or not the common office data is the same as that for a specific exchange acting as a master exchange in the network via a line through which call control signals and maintenance signals used between exchanges are communicated with other exchanges; and means for checking whether or not the common office data is the same that for the master exchange via the line when the line which carries a call control signal and a maintenance signal from the master exchange to other exchanges recovers from failure and then becomes a communicable state; and an exchange which is judged that common office data is different from that for the master exchange as a result from the checking means includes means for copying common office data for the master exchange via the line.
The line which carries the call control signal and the maintenance sig
Bui Bing
Foley & Lardner
Matar Ahmad
NEC Corporation
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