JPH03147455A - Parallel operation system for exchange - Google Patents

Abstract

PURPOSE:To provide a same station number to both exchanges by providing a function transferring a call to other exchange when the call with a subscriber telephone number not accommodated to one exchange is received. CONSTITUTION:When an incoming trunk 16 or 17 of an exchange 2 is started, a station number and a subscriber number sent from an opposite station are received to check whether or not the station number is a station number of its own exchange. When the station number is not the station number of its own exchange, normal relay connection processing is implemented. When the station number is the station number of its own exchange, whether or not a subscriber of the received subscriber number exists in its own exchange is confirmed. When the number exists in its own exchange, a relevant subscriber is called. When the subscriber does not exists in its own exchange, whether or not the incoming trunk is the incoming trunk 17 is confirmed, in the case of the trunk 17, the call connects to an announcement trunk 19. When the incoming trunk is not the incoming trunk 17, the call connects from an outgoing trunk 18 to the exchange 1 and the received station number and subscriber number are sent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a parallel operation system for exchanges, and particularly to a parallel operation system for exchanges having the same station number.

[Conventional technology]

In the conventional parallel operation system of exchanges, each exchange is given a different area number, and if a subscriber accommodated in one exchange receives subscriber services provided only in the other exchange, the A new subscriber was transferred to the other exchange, and a new area number and subscriber number were assigned at the same time.

[Problem to be solved by the invention]

The conventional parallel operation method of switching equipment described above is such that when providing a new service to a subscriber, the relevant subscriber is transferred from the existing switching equipment to an switching equipment with new functions.
There is a problem in that the subscriber's telephone number must be changed to a new area code and subscriber number.

[Means to solve the problem]

The parallel operation system of exchanges according to the present invention divides and accommodates a plurality of subscribers that do not have duplicate subscriber numbers into two, and each of the two exchanges having the same station number has one of the This configuration has a function of transferring the incoming call to the other exchange when an incoming call is received for a subscriber number that does not belong to the control range of the exchange connection of the exchange.

The control ranges of the exchange connections held by the two exchanges may be mutually variable.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The exchange 1 is an existing old type exchange, the exchange 2 is a new type exchange that can provide new services, the control device 3.5 is the control device of the exchanges 1 and 2, respectively, and the storage device 4.6 is the control device of the exchanges 1 and 2, respectively. Storage devices and subscribers 7, 8.9 are subscribers and subscribers 10, 11, and 12 accommodated in the exchange 1.
1 is a subscriber housed in the exchange 2, an incoming trunk 13 is an incoming trunk that connects the exchange 1 to another exchange (not shown), and an outgoing trunk 14 is an outgoing trunk of the exchange 1 that is connected to the exchange 2. The trunk 15 is an incoming trunk of the exchange 1 that is connected to the exchange 2, the incoming trunk 16 is an incoming trunk that connects the exchange 2 to another exchange (not shown), and the incoming trunk 17 is an incoming trunk of the exchange 2 that is connected to the exchange 1. The incoming trunk and the outgoing trunk 18 are the outgoing trunks of the exchange 2 connected to the exchange 1fil, and the announcement trunk 19 is an announcement drink for a vacant number connected to the exchange 2.

Next, the operation will be explained.

Figure 2 is a flowchart for incoming trunk activation according to the present invention;
The figure is a flowchart in the case of subscriber call origination accommodated by the own exchange according to the present invention.

First, when the incoming trunk 16 or 17 of the exchange 2 is activated, it receives the exchange number and subscriber number sent from the other party (step 100), and checks whether this exchange number is the exchange number of the own exchange (step 110). ). If it is not the station number of the local exchange, normal relay connection processing is performed. If it is the area number of the own exchange, it is checked whether the subscriber with the received subscriber number exists in the own exchange (step 120).
. If the subscriber exists in the local exchange, the corresponding subscriber is called (step 130). If it does not exist in the local exchange, it is checked whether the incoming trunk is incoming trunk 17 (step 140), and if it is trunk 17, it is connected to one announcement trunk (step 150). If the incoming trunk is not the incoming trunk 17, the outgoing trunk 18 is connected to the exchange 1 and the received station number and subscriber number are sent out (step 160). On the other hand, when the incoming trunk 13 or 15 of exchange 1 is activated, determination and connection processing are performed in the same way as in the case of exchange 2 described above, and if the subscriber with the receiving station number and subscriber number does not exist in the local exchange, connects to the exchange 2 from the outgoing trunk 14 and sends out the received station number and subscriber number (step 160). Next, when the subscriber 10 accommodated in the exchange 2 makes a call, first the subscriber 10 receives the dialed station number and subscriber number (step 170), and then checks whether the received station number is the local exchange's station number (step 170). Step 180). If it is not the station number of the local exchange, normal outgoing connection processing is performed. In the case of the local exchange number, it is checked whether a subscriber with the received subscriber number exists in the local exchange (step 190). If the subscriber exists in the local exchange, the corresponding subscriber is called (step 200>). If it does not exist in the local exchange, it is connected to the exchange 1 through the outgoing trunk 18 and sends out the received station number and subscriber number (step 210). On the other hand, exchange 1
If the subscriber 7 accommodated in the local exchange makes a call, determination and connection processing are performed in the same way as in the case of the exchange 2 described above, and if the subscriber with the receiving station number and subscriber number does not exist in the local exchange, , connects to the exchange 2 from the outgoing trunk 14, and sends out the received station number and subscriber number (step 210).
. As a result, exchange 1 and exchange 2 can have the same area number (for example, exchange 1 has a telephone number (0471').
) 82-5000 subscribers, telephone number (04
71) Subscriber 82-5001), even if subscriber 7 is transferred to exchange 2 to receive a new service,
You can keep the same station number and subscriber number.

Furthermore, if exchange 1 only has the capacity to accommodate a few thousand subscribers, it should be possible to allocate up to 10,000 subscribers to one station number, but in the conventional parallel operation system of exchanges, the same station number cannot be assigned. Since a subscriber number cannot be held in multiple exchanges, subscriber numbers that cannot be accommodated in exchange 1 cannot be used. However, if the present invention is applied to such a case, the numbers that cannot be accommodated in the exchange 1 can be accommodated in the exchange 2, which is effective as a temporary measure in areas where the number of numbers is decreasing.

In addition, when applied to replacing old switching equipment with new switching equipment, there is no need for simultaneous switching, which required the most man-hours and attention in conventional switching work, and the number of switches required for each subscriber is reduced. Since it is only necessary to change the affiliation of subscribers in the storage devices 4 and 6 in both stations, it is possible to equalize the man-hours for the switching work and to prevent the occurrence of major accidents.

〔Effect of the invention〕

As explained above, the present invention provides a function between an existing exchange and a new exchange to transfer a call to the other exchange when a call is accepted for a subscriber telephone number that is not accommodated by one exchange. This makes it possible to assign the same area number to both exchanges, so that when a subscriber is transferred from one exchange to another, the area number and subscriber number already assigned to the subscriber do not need to be changed. This has the effect of providing new services.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flowchart for incoming trunk activation according to the present invention, and FIG. 3 is a flowchart for subscriber origination accommodated by the own exchange according to the present invention. 1... Switching machine, 2... Switching machine, 3.5... Control device, 4.6... Storage device, 7, 8, 9, 10, 11°13.15, 16.17... Entering trunk, 14°18
...out trunk, one...announcement drink.

Claims (1)

[Scope of Claims] 1. A plurality of subscribers who do not have duplicate subscriber numbers are divided into two, and the control range of each exchange connection is divided into two exchanges having the same area number. 1. A parallel operation system for exchanges, characterized in that, when an incoming call is received for a subscriber number that does not belong to the control range of the exchange connection, the incoming call is transferred to another exchange. 2. The parallel operation system for exchanges according to claim 1, wherein control ranges of the exchange connections of the two exchanges are mutually variable.