JPH03250844A - Exchange system in building - Google Patents

Abstract

PURPOSE:To allow floor exchanges to back up themselves mutually by forming a bypass route connecting a subscriber under the control of one floor exchange to other floor exchange via a subscriber circuit when one floor exchange is faulty. CONSTITUTION:When a 1st floor exchange 11 is faulty, 1st and 2nd changeover devices 21, 22 of the 1st floor exchange 11 are thrown to the position of a 2nd contact C2 respectively and a 3rd changeover device 23 is thrown to the position of the 2nd contact C2. Then a bypass route to the 2nd floor exchange 12 is formed. When the 2nd floor exchange 12 is faulty, the bypass route to the normal 1st floor exchange 11 similarly. Thus, the adjacent exchanges back up each other, the security is improved and the reliability is enhanced.

Description

[Detailed Description of the Invention] [Summary] ゝIntra-building switching consisting of a plurality of floor switchboards, in which extension connections are made between adjacent subscribers via inter-floor paths, and which are centrally controlled by -1 central switchboards. The system is equipped with a switching means, an inter-floor communication circuit, and a subscriber circuit for each subscriber, and when one floor exchange becomes faulty, the subscriber under it can be switched to another via the subscriber circuit. By using the switching means, a detour route is formed to connect to the floor exchanges, and the floor exchanges mutually back up each other, thereby improving the reliability of the system.

[Industrial application field]

at least two first and second floor exchanges each accommodating a plurality of subscribers thereunder; an inter-floor path that provides an extension connection between the first and second floor exchanges; The present invention relates to an in-building switching system having a single central switching system that centrally controls second floor switching equipment.

In order to distribute the risk of failure, ensure security, and comprehensively consider the demands of dozens of tenants in a super-large building, we adopted a distributed installation configuration in which switchboards, that is, floor switchboards, are distributed and installed on each floor. We have already proposed the above-mentioned in-building exchange system.

This system takes into account the economic efficiency of switching equipment and the efficient operation of each tenant's outside line or leased line traffic.
A single exchange for the external line (including dedicated line) interface, that is, a center exchange, is required. The present invention describes security in the above exchange system.

[Conventional technology]

FIG. 4 is a diagram showing an in-building exchange system on which the present invention is based. In this diagram, 10 is the center switchboard (C5: Center 5tatio) that forms the core of the building.
n), and a plurality of (three in the figure for simplicity) first floor exchange (FSI) 11, second floor exchange (FSI)
2) 12, 3rd floor exchange (generally controls FS3H3).

FS is Floor 5tation. A plurality of participating devices are accommodated under each floor exchange.

If the illustrated floor exchanges 11, 12, and 13 are in the same tenant, it is necessary to make an extension connection between participating devices on different floors.
5 is wired. On the other hand, external line connections are made at the center switchboard 10.
This is done via path 16 with.

[Problem to be solved by the invention]

In the above-described in-building exchange system, the danger in the event of a failure is distributed throughout the building, and security is ensured to a certain extent.

However, in a super-large intelligent building, for example, the number of participating devices on each floor becomes enormous. In this case, the above-mentioned in-building exchange system has a problem in that, when viewed on a floor-by-floor basis, there is no risk distribution at all in the event of a failure, and security is insufficient.

Therefore, in view of the above-mentioned problems, it is an object of the present invention to provide an in-building exchange system that ensures security not only for the entire building but also for each floor within the building.

[Means to solve the problem]

FIG. 1 is a diagram showing the basic configuration of the present invention.

Each has a common contact CO, a normally closed first contact C1 (the contact is closed during normal operation, that is, when not driven), and a second contact C2 that is normally open (the contact is open during normal operation, that is, when not driven). 1 switch 21, 2nd switch 22
and the third switch 23 to each target joining device (for example,
- For example, prepare for extension class A or higher). Furthermore, each third switching device 23 is provided corresponding to the floor switching device 1.
1 and 12 and a first contact C1 and a second contact C2 of the third switch 23, an inter-floor communication circuit 31 and a subscriber circuit 32 are respectively inserted. However, the former circuit 31 is an existing one.

In each floor exchange 11, 12, each first switch 2
1 connects its common contact CO and its first contact C1 to the corresponding joining device and floor exchange 11, 12, respectively.

Each second switch 22 connects its second contact C2 to the first switch 2.
1 and the common contact CO is connected to the inter-floor path 15, respectively.

The common contact CO of each third switch 23 is connected to the first contact C1 of the second switch 22.

[For production]

At the time of failure of the first floor exchange 11, the first and second switches 21 and 22 of the first floor exchange 11 are switched to the second contact 02 side, and the third switch 23 of the second floor exchange 12 is switched to the second contact 02 side. Switch to the second contact C2 side. Here, a detour route to the second floor exchange 12 is formed. A new subscriber circuit 32 is required to connect the failed joining device under the first floor exchange 11 to the second floor exchange 12. However, the subscriber circuit itself is already existing in the exchange.

Note that even when the second floor exchange 12 becomes a failure, a detour is made to the normal first floor exchange 11 in the same manner as described above.

In this way, adjacent floor exchanges back up each other.

〔Example〕

FIG. 2 is a diagram showing the normal state of the system according to the present invention. During normal times, that is, when no failure has occurred, for example, the extension connection between subscriber (TEL) A and subscriber (TEL) C on a different floor is connected to the first and second
A communication path is formed via the normally closed contacts C1 of the third switching devices 21, 22, and 23, and communication between subscriber A and subscriber C becomes possible. In the figure, the dashed-dotted double-headed arrow represents the communication path.

In the figure, the already mentioned inter-floor path communication circuit 31 is abbreviated as FC, and the subscriber circuit 32 is abbreviated as LC, both of which are directly connected to the corresponding floor exchanges 11, 12, and 13. Each floor exchange has its own central control unit C.
C, and a main memory device MM that cooperates with the main memory device MM. This CC also cooperates with a fault monitoring circuit (TS) 33 newly introduced according to the present invention. The fault monitoring circuit 33 constantly monitors whether the corresponding floor exchange is normal or not, and switches the contacts of the switch when a fault occurs. When a fault occurs in the floor switch FSI, it is detected by the fault monitoring circuit 33, and this fault is detected by the adjacent floor switch FS2 using the common line signaling system (although the common line signaling link is not shown in Figure 2, the communication path and is detected under the corresponding network configuration), and the contacts of the switch belonging to FS2 are also switched.

According to this embodiment, there are tenant companies P and Q in the building, and of these, company P occupies three floors and connects the adjacent floor exchanges with an inter-floor path 15. There is. The present invention is effective when a plurality of floor switching machines are provided within the same tenancy, such as Company P.

FIG. 3 is a diagram showing the state of the system according to the present invention at the time of a failure. At the time of failure, the extension connection between subscriber (TEL) A and subscriber (TEL) C on a different floor is
A communication path is formed via the normally open contacts C2 in the second and third switching devices 21, 22, and 23, and communication between subscriber A and subscriber C becomes possible.

In the figure, solid double-headed arrows represent the communication path.

In addition, each contact may be comprised with a relay contact, and may be comprised with a semiconductor switch. These contacts do not require high speed.

The processing outline of the present invention will be explained below with reference to FIGS. 2 and 3. In addition, floor switching machine (FS 1)
A case will be explained taking as an example a case where No. 11 is in failure.

1) Route switching operation processing (i) The fault detection logic of the floor switch FSI is, for example,
The fault monitoring circuit (T
S) 33 always periodically sends a switch normality confirmation signal to the switch FS1 main body, and after receiving the specified return information from the switch FSI, checks its contents and returns the switch to the switch FSI.
shall confirm the normality of the

During signal transmission/reception, if a signal cannot be received from the exchange FSI and is still unreceivable even after a certain number of retries, it is determined that there is a failure in the exchange Psi. Thereafter, the circuit 33 continues the signal transmission/reception process for recovery monitoring.

(ii) In the route switching process after the psl becomes a failure, the monitoring circuit 33 attached to the switch
After that, a route switching order is sent to all the second switching devices 22 connected to the calculated route, and the line is switched to the detour side (FS 2 side). Switch.

Next, a subscriber line route paired with the detour route is calculated, and the first switching device 21 performs the same process as described above to switch all the calculated subscriber lines to the detour side.

(ii) The above switch Psi at the adjacent floor switch FS2
Detection of failures is performed by processing that complies with the PBX common channel signaling system, which is an interoffice signaling system adopted in this in-building switching system with a distributed installation configuration. Due to an abnormality in the sequence, the switch FS
Detect a failure of I.

(iv) said exchange FS2 after detecting a fault in the FSI;
In the line switching process, first, an inter-floor line with a "switcher" provided between the failed exchange FSI and the adjacent exchange FS2 is calculated.

Next, a switching order to the subscriber circuit 32 side is sent to the third switch 23 of all the calculated target lines to switch the lines, and the inter-floor route (path 15) is connected to the FSI of the faulty exchange. It can be used as a private line (for call detection, etc.).

2) Connection processing (after route switching) When the exchange FSI fails, for example, from the subscriber (TEL) A accommodated in the exchange FSI to the subscriber (TEL) of the exchange FS2 (
TEL) The connection process when making a phone call to C is shown below.

(i) Subscriber A inputs dial information (for example, 4 digits) in the usual extension format without being aware of this even if the FSI exchange on the floor becomes a failure.

(ii) In this case, the call detection of subscriber A is performed by switch FS2.
However, as a preparatory process before that, the switch FS2 has the following:
Assuming in advance the operation processing as a subscriber after being switched, the subscriber data of the subscriber using the switched line (in this case, subscriber A of the exchange FSI) is transferred to the MM of FS2.
Set it to .

The same applies to the switched lines of other subscribers, and the data of each subscriber to be switched is the same as the subscriber data set in the MM of the exchange FSI, and the same data is set in the exchange FS2. I will keep it. Further, the subscriber data of the floor exchange FS3 is also set to the exchange FS2, and the subscriber data of the exchange FS2 is set to the exchange FS1.
It is also set in FS3.

Therefore, the exchange FS2 detects the calling of subscriber A, then analyzes the calling subscriber (A), and starts dial tone transmission processing. During the dial tone transmission process, subscriber A
Sends a dial tone to the machine and makes it ready to receive dials.

The subsequent series of connection processing such as analysis of subscriber A's dial information and call processing is similar to the extension origination connection for the extension subscriber of exchange FS2 in normal times.

3) Route cutback operation processing (fault recovery processing) (i) When a fault in the switch FSI is recovered, the recovery detection logic within the own switch is the fault monitoring circuit 3 connected to the switch FSI.
According to the monitoring order from FSI 3, when normal information is received a specified number of times at a specified time from the faulty exchange FSI, it is determined that the fault in the faulty switch FSI has been recovered.

(ii) The route switchback process after failure recovery is almost the same as (ii) of l) above, except that the order sent to the first and second switching devices 21 and 22 is route switchback order. The only thing you need to do is change the line and restore the switched line.

(i) In the adjacent floor switch FS2, the switch Psi
The logic for detecting failure recovery is based on the above-mentioned PBX No.
Processing is performed in accordance with the 7 common channel signaling system, and recovery from the failure of the exchange FSI is confirmed using prescribed signal sequence recovery logic.

(iv) The process by which the switch FS2 switches back the route after the failure is recovered is almost the same as (iv) of 1) above, except that the order sent to the third switch 23 is changed to the route switch order. , and return the switched line to its original state, and furthermore, change the line processing from being used for subscriber lines to being used for trunk lines (inter-floor routes).

〔Effect of the invention〕

As explained above, according to the present invention, the security of the floor switching equipment on each floor is also improved, and an in-building switching system with high layer reliability is realized.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle configuration of the present invention. FIG. 2 is a diagram showing the normal state of the system according to the present invention. FIG. 3 is a diagram showing the state of the system according to the present invention in the event of a failure. FIG. 4 is a diagram illustrating an in-building exchange system that is a prerequisite to the present invention. In the figure, 10... Center switch, 11.12.13... Floor switch, 15... Inter-floor path, 21... First switch, 22... Second switch, 23...・Third
Switching device, 31... Inter-floor communication circuit, 32... Subscriber circuit, 33... Fault monitoring circuit,
Place...Subscriber, CO...Common contact, C1...
・First contact, C2... second contact.

Claims (1)

[Claims] 1. At least two first floor exchanges (11) and a second floor exchange, each of which accommodates a plurality of subscribers (TEL) under its control;
Overall control of the floor exchange (12), the inter-floor path (15) that connects the extension lines between the first and second floor exchanges (11, 12), and the first and second floor exchanges (11, 12). In an in-building switching system having a single central switch (10), each of which has a common contact (C0), a normally closed first contact (C1), and a normally open second contact (C2). A first switching device (21), a second switching device (22) and a third switching device (23) are provided for each of the subscribers (TEL), and further provided for each of the third switching device (23), An inter-floor communication circuit (31) and a subscriber inserted between the floor switchboard (11, 12) and the first contact (C1) and second contact (C2) of the third switch (23), respectively. In each of the floor exchanges (11, 12), each of the first switching devices (21) connects its common contact (C0) and its first contact (C1) to the corresponding subscriber ( TEL
) and floor exchanges (11, 12), each said second switching device (22) connects its second contact (C2) to the second contact (C2) of said first switching device (21); A common contact (C0) is connected to the inter-floor path (15), and the common contact (C0) of each third switch (23) is connected to the first contact (C1) of the second switch (22). When the first floor exchange (11) fails, the first and second switching devices (21, 22) of the first floor exchange (11) are connected to the second contact (C2) side, respectively. An in-building exchange system characterized in that the third switch (23) in the second floor exchanger (12) is switched to the second contact (C2) side.