JPH03238996A - Exchange system in building - Google Patents

Abstract

PURPOSE:To eliminate need for caring about difference of a signal format of the common line signal system between floor exchanges of each floor by passing a signal through a center exchange. CONSTITUTION:After control information is converted into a signal format in compliance with plural basic functions offered respectively to open interfaces 18,19 at a floor exchange and a center exchange, a floor exchange 11B using a different signal format and a center exchange 12 in exchange connection with the floor exchange 11B apply exchange processing respectively. Thus, the transfer speed of the control information is naturally slower than the transfer speed with the floor exchange 11A of the same kind of exchange but the exchange system in a building corresponding to multi-vendor is easily built up. Thus, the difference from the specifications in each floor exchange is not cared for.

Description

[Detailed Description of the Invention] [Summary] The present invention has a plurality of floor exchanges installed on each floor in a building, and a center exchange that forms a common external line interface for these floor exchanges, and has a central exchange and each floor. When the common line signaling system that performs exchange processing with exchanges is executed using multiple types of signal formats, each floor exchange and center exchange that use the same signal format can be used with ordinary common line signaling equipment. For each floor exchange and center exchange that communicate and use different signal formats, the common line communication equipment on the floor exchange side and the center exchange side, and the open interfaces on the floor exchange side and the center exchange side that cooperate with these, respectively. At least, communication is performed by a conversion processing unit that connects to the common line communication device in the center exchange and converts the signal format, converts it into a signal format that complies with multiple basic functions provided by each open interface, and then transmits it to the floor. The exchange processing is performed at the exchange and the central exchange, respectively, thereby realizing a so-called multi-vendor in-building exchange system.

[Industrial application field]

Multiple floor exchange machines installed on each floor of the building,
A common external line interface is provided to the plurality of floor exchanges, and a single center exchange performs switching processing based on a common line signaling system between the plurality of floor exchanges. The present invention relates to an intra-pillar switching system in which the floor switching equipment uses the same signal format as the common channel signaling system and the floor switching equipment uses a signal format different from the signal format.

The above-mentioned type of in-building switching system has already been proposed by the present applicant, and is a switching system with a so-called distributed installation type structure within a building, which is suitable for application to, for example, intelligent buildings. By the way, conventional in-building switching systems do not have the above-mentioned central switching equipment.
Each floor exchange was individually connected to an outside line, and extension connections could only be made between specific floor exchanges, so it was not an efficient system in terms of hardware.

The present invention describes common line signal processing in the above-mentioned switching system having a distributed installation type structure within a building.

[Conventional technology]

In a conventional in-building switching system, so-called interoffice signals responsible for switching control between floor switchboards generally employ a dial pulse (DP) format or a multifrequency code (MF) format. When such interoffice signals are used, each floor exchange can relatively freely create and use communication processing programs. Therefore, even if various types of floor switchboards coexist in a large intelligent building, for example, an in-building switchboard system can be constructed without worrying too much about the differences in specifications of each floor switchboard.

[Problem to be solved by the invention]

In response to the recent shift to 1511N, there is a trend to perform exchange control using a common line signaling system. In this case, the common line signaling system between exchanges in the public network is the so-called CCITT No.
The signal format for implementing this common line signaling system is unified into one. However, the floor switching equipment in the building switching system, that is, the PBX
There are no restrictions on the signal format for implementing the common line signaling method, and it varies from PBX manufacturer to PBX manufacturer. The contents of the signal format include telephone number information of the called party, telephone number information of the calling party,
It includes various service information, etc., and is independently developed by each manufacturer and provided to users.

Under such circumstances, there is a problem in that tenant buildings cannot freely accommodate different types of PBXs brought in by each tenant within the building, making it impossible to realize a so-called multi-vendor compatible in-building exchange system.

Therefore, in view of the above problems, it is an object of the present invention to provide an in-building exchange system that is compatible with so-called multi-vendors.

[Means to solve the problem]

FIG. 1 is a diagram showing the basic structure of an in-building exchange system according to the present invention. In this figure, 10 is an in-building switching system that accommodates a large number of participating devices (including data terminals, computer terminals, and facsimile machines), 11 is a plurality of floor switching machines installed on each floor of the building, and 12 is a A single center exchange/machine forms a common external line interface for the plurality of floor exchanges 11 and performs switching processing based on a common line signaling system between each floor exchange 11, and the NW and CC are Existing network and central control unit. Here, the floor exchange 11 is
The floor exchanges 11A are the same model as the center exchange 12, and the floor exchanges 11B are different from the center exchange 12. In other words, within this in-building switching system 10, there is a floor switch 11A that uses the same signal format as the common channel signaling format executed in the center switch 12, and a floor switch that uses a signal format different from the signal format. Exchange 11B coexists. In addition, in FIG. 1, for the sake of simplification, a case is illustrated in which two floor exchangers 11A and two floor exchangers 11B coexist.

First, for each floor exchange 11A and center exchange 12 that use the same signal format,
A common line signaling device (C3E:
Common Signaling Equipment
t) 13 and 14 are provided. On the other hand, a floor exchange side common line communication device (CCE: Co
mmonSignaling Communicati
on equipment) 15 and a common line communication device 16 on the center exchange side, and an open interface (0/I on the floor exchange side) that cooperates with these.
/F:0pen InterFace) 17 and a center exchange side open interface 18.

Further, among the floor exchange 11B and the center exchange 12, a conversion processing unit (CONV) is connected at least between the common line communication device 16 in the center exchange 2 and the center exchange side open interface 18, and converts the signal format. ) 19 shall be established.

In Fig. 1, the wiring between the networks N'vV, between the common line signaling devices C5E, and between the common line communication devices CCE is schematically shown as individual wiring. (not shown), the wiring can be used as an optical loop as a LAN (Local Area
Network) configuration is also possible.

[For production]

After converting the control information into a signal format compliant with a plurality of basic functions provided by the floor exchange side and center exchange side open interfaces 18 and 19, respectively, the floor exchange 11B using different signal formats and these floor exchanges 11B Each exchange process is performed in the center exchange 12 that is exchange-connected to the central exchange.

Note that the open interface 0/I/F is an open architecture interface, and is a processor that can disclose various internal commands (described later) to the user. Currently, 0AI (manufactured by NEC Corporation), TCSI
(manufactured by Fujitsu) etc. Using such an open interface enables conversational communication. Since it is a conversational format, so-called handshakes occur frequently, and the transfer speed of control information is naturally slower than the transfer speed with the floor exchange 11A of the same model.
A major benefit is that an in-building switching system compatible with multiple vendors can be easily constructed.

〔Example〕

FIG. 2 is a diagram showing a first embodiment of the in-building exchange system according to the present invention. Similar components are designated with the same reference numerals or symbols throughout the entirety of the invention. In addition, in FIG. 2 (the same applies to FIG. 3), for the sake of simplification, only one floor exchanger 11A11B of the same model and a different model are shown.

In addition, FS in this figure is a 7o floor switch (Floor 5t
ation), CS is the center switch
5tation), FM has 7 file memory (File
FS side and C3 respectively.
Each file memory (FM) on the side has a reference number 2.
1 and 22 are attached.

In the first embodiment, the conversion processing unit (CO'1iV) 1
This is an example in which all 9 are consolidated in one place in the center switching equipment 2, and common to n center switching equipments installed corresponding to n (n=1.2.3...) floor switching equipment 11B. Line communication equipment (CCEI, performs time-division multi-processing for CCE2-CCEnH6.

In general, even if it is possible to secure a call between exchanges of different models, it is not possible to provide a higher level of service.

However, this makes no sense in adopting a common line signaling system that enables the provision of advanced services. The present invention makes it possible to fully utilize exchange using such a common line signaling system.

As an example of this advanced service, a so-called follow-up call will be explained in 5) using FIG. 2.

A person P in the building calls 2 from the telephone number 3001.
When P moves to phone number 001, calls made to P's original phone number (3001) are transferred to the new phone number (2).
001), the flow of control signals is shown by arrows. For example, from the 16th floor floor switch (FS) 11A to the 15th floor floor switch (FS) 11B (7) 7
The file memory 21 is notified that P is at the telephone of 2001. Then, when a call is received to 3001, by referring to the contents of FM21 of FS11A on the 15th floor, it will be known that P is at 3001, and the call can be forwarded.

FIG. 3 is a diagram showing a second embodiment of the in-building exchange system according to the present invention. In the second embodiment, in FIG.
The conversion processing unit (CONV) 19, which used to be one unit, was distributed within the C312 and FSllB, and within the C312, the conversion processing unit (CONV>29 and 29' was also distributed to support n FS units). Therefore, within the C312, the open interface (0/I/F) is also distributed (indicated by reference number 28).In the case of distributed processing, the hardware scale becomes larger, but the processing of control information becomes faster. Ru.

FIG. 4 is a sequence diagram showing a first example of operation of the in-building exchange system, and FIG. 5 is a sequence diagram showing a second example of operation of the in-building exchange system. The first operation example (FIG. 4) shows the information transfer sequence when P (phone number 3001) under FS11B on the 15th floor moves to the phone (phone number 2001) of FS11A on the 16th floor. Note that this applies to both the first embodiment (FIG. 2) and the second embodiment (FIG. 3). DSC5 in Figure 4
NEN will be shown in the section below. On the other hand, in Figure 5, if a call comes in to the phone number 3001 on the 15th floor,
CC in FSllB on 15F looks at 3001 in the number management file in FM21 and selects 200.
I know what to transfer to 1. In Figure 5, C3R, LND
5SNN, DND are shown in the table below.

A supplementary explanation will be given of the first embodiment (FIG. 2) and the second embodiment (FIG. 3). First, in the C3 centralized type (Figure 2), a common cONV19 is placed in the C312, and there are dictionaries (multiple) corresponding to various basic functions (facilities) of the open interface of each FS11B.
are stored in memory and processed in parallel using a multitasking configuration. It is efficient because it can perform multiple simultaneous processes with one processor. When an FS is added, there is no need to add C0NV, and it is only necessary to implement the processing task in C3lI's C0NVf9.

Next, in the FS branch form (Fig. 3), l, that FSl
It has a dictionary of open interface facilities of LB in memory, and 0/I/F of FS.
Every time a command comes from, it is analyzed and C312-C
Send to 0NV29.

C512i: C0707 compatible (7) C0NVf9 is installed in each FS11B on a one-to-one basis, receives the signal from FS11B, converts it to the C512 open interface facility, and sends it to C312's 0/I/F 28. Send. Since it is a one-to-one method, it has the characteristic that the load on the C0NV is light. When FS11B is added, C0NV29 and 29' will be added on both the FS side and the CS side.

FIG. 6 is a block diagram showing an example of an open interface.

Receives command from CC, open interface Ro・I
Transmission system using /F facility command! Send from copy 0. Conversely, open interface facility commands received from the transmission control unit are disassembled, converted into the exchange internal format, and passed to the CC.

Examples of various basic functions (facilities) of the open interface (port/I/F) are shown in the table below.
- Various commands output from I/F.

〔Effect of the invention〕

As explained above, according to the present invention, an in-building switching system is created in which there is no need to worry about differences in signal formats of common line signaling systems between floor switches on each floor by passing through a central switch. Realized.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the principle configuration of the in-building exchange system according to the present invention, Fig. 2 is a diagram showing a first embodiment of the in-building exchange system according to the present invention, and Fig. 3 is a diagram showing the in-building exchange system according to the present invention. FIG. 4 is a sequence diagram showing a first example of operation of the in-building exchange system; FIG. 5 is a sequence diagram showing a second example of operation of the in-building exchange system; FIG. 6 is a block diagram showing an example of an open interface. In the figure, 10... In-building switching system, 11A... Floor switching equipment of the same model, 11B... Floor switching equipment of different model, 12... Center switching equipment, 13.14... Common line signaling device, 15.16...Common line communication device, 17.18...Open interface, 19...
Conversion processing section.

Claims (1)

[Claims] 1. A plurality of floor exchangers (11A, 11B) installed on each floor of a building, and a common external line interface for the plurality of floor exchangers (11A, 11B), and a Exchange machine (11
A, 11B) consists of a single center exchange (12) that performs switching processing under the common line signaling system, and the center exchange (12) performs switching processing based on the common line signaling system. In an in-building switching system in which the floor switching equipment (11A) using the same signal format as the signal format and the floor switching equipment (11B) using the signal format different from the signal format coexist, Each of the floor exchanges (11A) and the center exchange (12) to be used is provided with a common line signaling device (13, 14) that mutually exchanges control information, and each of the floor exchanges (11A) and the center exchange (12) that use the different signal formats A common line communication device (on the floor exchange side) for mutually transmitting and receiving the control information to and from the floor exchange (11B) and the center exchange (12), respectively.
15) and common line communication device on the center exchange side (16)
and a floor exchange side open interface (17) and a center exchange side open interface (18) that cooperate with these, respectively, and furthermore, of the floor exchange (11B) and the center exchange (12), at least the center exchange ( 12) is provided with a conversion processing unit (19) connected between the common line communication device (16) and the center exchange side open interface (18) and converting the signal format; After converting the control information into a signal format compliant with a plurality of basic functions respectively provided by the center exchange side open interfaces (17, 18), the floor exchanges (11B) using the different signal formats and these floors The center exchange (12) is exchange-connected to the exchange (11B).
) is an in-building exchange system characterized by performing exchange processing at each location.