JPH01194646A - Electronic exchange by common line signal system - Google Patents

Abstract

PURPOSE:To share a message transferring means with out-of-office communication and intra-office communication by inserting and eliminating an identifier to a message exchanged between an inter-office message exchanging means and an intra-office message exchanging means and deciding the transmission path of the message based on the identifier. CONSTITUTION:The message transmitted from the other exchange or the one transmitted from the device in the intra-office is received by signal terminals 1A and 1B, a network indicator(NI) is expanded as the inter-office communication message by an NI converting path 2, and an identifying bit between the inter-office communication and the intra-office communication is inserted. A message transfer destination is designated by the expanded NI and an incoming signal office member (DPC). By receiving it, a routing part 4 determines a sending destination signal link with the use of a table. Thus, the message can be processed by the same treatment regardless of the inter-office or the intra- office communication.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an electronic exchange using a common line signaling method.
In particular, the present invention relates to a device in which message transfer means is shared for external communication and intra-office communication.

[Conventional technology]

Recently, in response to the recommendations of the International Telegraph and Telephone Consultative Committee (CCITT), the introduction of common channel signaling system No. 7 is underway.

An exchange based on the common line signaling system N007 is composed of a message transfer section and a user section. Messages transmitted from other exchanges are subjected to necessary processing for transfer by a message transfer section, and then distributed to user sections. Then, the user section performs necessary processing for communication. Furthermore, messages from the user section are transmitted to other exchanges via the message transfer section.

Further, in the above-mentioned exchange, communication is also performed between internal devices. In this case, the message would be distributed to the user section via the message transfer section, as described above.

[Problem to be solved by the invention]

In the above exchange, although the interoffice communication processing and the intraoffice communication processing in the message transfer section are basically the same, the message transfer section cannot be used commonly for both communications.

That is, if a network indicator (N1) included in a message can be used to identify intra-office communication, it is possible to share the message transfer section. However, in the common line signaling system, Nl is specified for interoffice communication and cannot be used for intraoffice communication. Therefore, in the conventional exchange, it was necessary to separately provide a message transfer section for inter-office communication and a message transfer section for intra-office communication.

As a result, maintenance work such as development work and changes/additions to the functions of the message transfer unit requires double effort, and the processing program area on the main memory of the central processing unit becomes large. There are also points.

SUMMARY OF THE INVENTION In view of this problem, it is an object of the present invention to provide an electronic exchange in which a message transfer section can be used in common for inter-office communication and intra-office communication.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an electronic exchange equipped with the following means.

(1) Message exchange means for transmitting and receiving messages to and from other electronic exchanges.

(2) Message station sending and receiving means for sending and receiving messages to and from internal devices.

(3) Identifier insertion/deletion means for inserting/deleting identifiers for identifying messages sent/received to/from the message inter-office sending/receiving means and the message intra-office sending/receiving means.

(4) Message transfer processing means that performs message transfer processing on messages sent to and received from the identifier insertion/deletion means.

(5) Interoffice communication processing means for performing interoffice communication processing on messages.

(6) Intra-office communication processing means for performing intra-office communication processing on messages.

(7) Message transmission path switching means for switching the message transmission path between either one of the inter-office communication processing means or the intra-office communication processing means and the message transfer processing means based on the above-mentioned identifier.

By the means described above, the message transfer means can be used for both external communication and intra-office communication.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the plurality of signal terminals 1 are comprised of a signal terminal IA set exclusively for inter-office communication and a signal terminal IB set exclusively for intra-office communication. As shown in FIG. 2, when receiving, the Nr converter 2 expands the 2-bit length Nl to 3 bits and inserts an identification bit to identify whether the message is an inter-office communication message or an intra-office communication message. At the same time, during transmission, the extended Nl is converted to a 2-bit long Nl and the identification bit is deleted. For example, the identification bit is set such that if it is 0, it is inter-office, and if it is 1, it is intra-office. The message transmission/reception control section 3 performs processing necessary for transfer on messages. The message routing B4 distributes messages from the message transmission/reception control section 4 to the user section 5, and determines a transmission route for messages from the user section 5.

The plurality of user units 5 perform communication processing on messages, and are composed of a user unit 5A having a function exclusively for inter-office communication, and a user unit 5B having a function only for intra-office communication. .

Here, the message reception operation will be explained.

Messages transmitted from other exchanges or messages transmitted from equipment within the station are sent to the signal terminal IA.
or IB. Next, by the N■ conversion unit 2,
NI has been expanded as an inter-office communication message, and
An identification bit for intra-office communication is inserted. Then, the message transmission/reception control section 3 performs necessary processing for transfer, and the message is transferred to the message routing section 4. The message routing unit 4 distributes the message to the required user units 5A to 5B for interoffice communication based on the extended NI and service information (Sl) included in the message.

Next, the message sending operation will be explained.

The user units 5A and 5B make a message transfer request to the message routing unit 4.

At this time, the message transfer destination is specified using the extension Nr and the destination station number (DPC). In response to this, the routing unit 4 uses the table shown in FIG. 3 to determine the destination signal link. In other words, processing can be done in the same way regardless of whether it is between stations or within a station.

When the destination signal link is determined, the user units 5A to 5
A message is sent from B and transferred to the message transfer section 2. The Nl conversion 82 converts the extended NI included in the message into a normal 2-bit Nl and transfers it from the signal terminal IA to IB. As a result, the Nl of messages transmitted to other exchanges conforms to international regulations.

Note that in this embodiment, by expanding Nl, the
Although the configuration was such that an identification bit within the station was inserted, it is possible to insert an identification bit in any field near the label within the message.

〔Effect of the invention〕

As explained above, according to the present invention, the identifier insertion/deletion means inserts/removes an identifier into the message sent/received to/from the message inter-office sending/receiving means and the message intra-office sending/receiving means, and the message transmission path switching means: Since the message transmission path is determined based on the identifier, it is possible to share the message transfer means for external communication and intra-office communication.

Therefore, there is an advantage that only one message transfer section is required, and development work and maintenance work are unified, improving efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an electronic exchange according to an embodiment of the present invention, FIG. 2 is a conceptual diagram showing an extended Nl, and FIG. 3 is a conceptual diagram showing a table used in message routing control. 1...Signal terminal, IA...Signal terminal dedicated for inter-office communication, 1B...
...Signal terminal dedicated for intra-office communication, 2...Nl conversion unit, 3...Message transmission/reception control unit, 4...
・Message routing section, 5...User section, 5A...User section dedicated to inter-office communication, 5B...
...User section dedicated to internal communication. Applicant NEC Corporation Agent Patent Attorney Umeo Yamauchi Wc1 Figure A Figure 2 Figure 3

Claims (1)

[Scope of Claims] Inter-message exchange means for transmitting and receiving messages to and from other electronic exchanges, intra-message exchange means for transmitting and receiving messages to and from internal devices, and the inter-message exchange means and intra-message exchange means An identifier insertion/deletion means for inserting/deleting an identifier for identifying each message to be sent/received; a message transfer processing means for performing message transfer processing on a message sent/received to/from the identifier insertion/deletion means; an inter-office communication processing means that performs inter-office communication processing on the message; an intra-office communication processing means that performs intra-office communication processing on the message; and one of the inter-office communication processing means and the intra-office communication processing means and the An electronic switching system using a common line signaling system, comprising message transmission path switching means for switching message transmission paths between message transfer processing means, and said message transmission means being shared for external communication and intra-office communication. .