JPS5866490A - Automatic switchboard - Google Patents

Abstract

PURPOSE:To ensure an efficient operation of an automatic switchboard with a low charge, by having an automatic selection for the connection route of a trunk line by the service priority and forming a calling loop. CONSTITUTION:A calling subscriber has the dialing of a trunk line, and this dial information is transmitted to a central control part 4 via a subscriber circuit 2 and a subscriber control part 3. Then the dial information is analyzed at the part 4 to decide the territory of the dialing. At the same time, the part 4 knows the priority of the calling subscriber from the data on each telephone set at a memory 11 since the calling telephone is previously informed to the part 4. The state of a trunk 7 is controlled at the part 4 and via a trunk control part 8, and the idle state of the connecting route of the trunk line is searched at the part 4 on the basis of the idle information of each trunk 7. Therefore an automatic switchboard can be efficiently operated with a low charge in such case that the charge is different by the time and the data.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to automatic switching equipment, and in countries such as the United States, where various central office lines or private communication networks are developed,
This is to enable automatic exchanges to be operated efficiently and at low rates when they can be used freely and their usage fees vary depending on the date and time.

Conventionally, when various offices, lines, or private communication networks were connected to an automatic exchange, there was a method in which a designated trunk was selected from the beginning by dialing the central office line, and the designated central office line was then captured, or a trunk There was a system in which trunk groups were arranged in descending order of usage charges, and trunk groups were selected in descending order of usage charges by dialing the central office line. However, the usage charges may change depending on the date and time of the area you are dialing, so you may want to adapt to this, or you may want to make a call even if the caller charges a higher charge, or conversely, you may have to wait a little longer to use a lower rate. It was not possible to adequately respond to requests such as wanting to make a phone call.

The present invention aims to eliminate such drawbacks by preparing several types of patterns representing central office line connection routes selected by dialed numbers, allowing the patterns to be switched by time of day or input operation, and by making it possible to switch between weekdays, public holidays, and Allocate a central office line connection route according to the priority given to the caller,
By arranging multiple trunk groups and waiting points for trunk groups on each central office line connection route, and setting whether or not they can be used depending on the time of day, the most suitable route at that time can be used at a lower fee. The trunk group is searched for vacancies, and each vacancy point can wait for vacancy only when set by the vacancy operation.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is a block diagram showing the main parts related to the central office line origination connection of an automatic exchange that is an embodiment of the present invention, and FIG.
6 through 6 are explanatory diagrams of the operation of the aircraft.

1 is a telephone, 2 is a subscriber circuit that detects on-hook and off-hook of telephone 1, supplies current, etc., and 3 is a circuit that checks the status of subscriber circuit 2 and relays dial information or control signals from telephone 1. A subscriber control unit 4 is a central control unit that performs judgment and processing based on the input information of various control units such as the subscriber control unit 3 and issues control instructions to necessary locations; 6 is a telephone office or various private facilities; 7 is a central office line that is connected to the central office line 6 and is in charge of making and receiving calls to and from central office equipment or private exchanges; 8 monitors the status of the central office trunk 7 and receives control information; 9 is a communication path network that connects the subscriber circuit 2, the office line trunk 7, etc.; 1o is a communication path network control unit that connects the communication path network 9 according to instructions from the central control unit 4; 11 12 is a clock serving as a clock source; and 13 is an input/output device for inputting and outputting necessary data.

The operation of this automatic exchange will be explained below. When the calling party puts the telephone 1 on-hook, an off-hook is detected at the subscriber circuit 2. This information is used by the subscriber control unit 3 to determine which telephone it is, and to notify the central control unit 4 of the information. Various tones are sent out for such operations, but will not be described below. Next, when the calling party dials the central office line, this dial information is transmitted to the central control section 4 via the subscriber circuit 2 and the subscriber control section 3. This central control unit 4 analyzes this dial information and determines which area the dial is for. For example, in the United States, the last three digits after the '9'' dial are usually dialed numbers that represent the region, so the region can be determined from this number.On the other hand, the central control unit 4 is notified in advance of which telephone the call is currently being made from. Based on this information, the priority of the caller is known from the data of each telephone set in the memory 11.Similarly, the memory 11 also contains the information shown in Figs. 2, 6, and 6. The data necessary to acquire a central office line trunk is preset.

Once you know the area to be dialed and the priority of the caller, you will need to select a central office line connection route. will be carried out. Input from the input/output device 13 determines whether the pattern is switched by the clock 12 or by input information. Clock 1
In the switching in step 2, which pattern is to be used depending on the day of the week or date is stored in the memory 11 as input information and automatically selected by the clock 12. Even when changing the pattern manually, it can be done by inputting it to the input/output device 13.

Once one central office line connection pattern is determined in this way, the second
As shown in the figure, one central office line connection route is determined according to the region and the calling party's priority.

As shown in FIG. 3, the central office line connection route is made up of several trunk groups and points (hereinafter referred to as Q points) for waiting for trunk groups. Note that a trunk group is a collection of several trunks 7 of the same type that are grouped together, and all trunk free status checks are performed based on the trunk group.
Group management is performed by a central control section 4.

As shown in FIGS. 4 and 5, the availability of trunk groups and Q points of the central office line connection route is set for each unit time, and is preset in the memory 11 as a time table.

As a specific example, FIG. 6 shows the availability of trunk groups and Q points at times 13:00 and 17:00.

In Figure 6, "1" indicates usable, and "0" indicates unusable. Based on this timetable information, the central office line connection route shown in Figure 3 is the same at 13:00 and 17:00. This is a combination like this. Therefore, when the caller dials the central office line dial number at 13:00, the time 13 shown in FIG.
A trunk group empty search is performed in the order of time combinations, ie, TG1-TG2. The status of the trunks 7 is managed by the central control unit 4 via the trunk control unit 8, and the above-mentioned office line connection route clearance search is performed by the central control unit 4 based on the availability information of each trunk 7. TGl or T
If there is a gap in any trunk group in G2, the vacant trunk 7 is captured via the trunk control unit 8, and the dial sent to the central office line 6 is transmitted from the central control unit 4 via the trunk control unit 8. The dial signal is given to the corresponding trunk 7, and the dial signal is sent out from the central office line 6.

On the other hand, if there is no space in the trunks of TG1 and TG2, the search is performed up to the Q2 point as shown in FIG. 3, and the search is temporarily stopped at the Q2 point. At this point, the central control section 4 notifies the calling telephone 1 via the subscriber control section 3 and the subscriber circuit 2 that it is in the busy state. If the caller performs an operation to wait for a trunk to become available, the information about the trunk to be available is notified to the central control section 4 via the subscriber circuit 2 and the subscriber control section 3, and the telephone 1l-
At JQ2 points, you will be waiting for a trunk. The caller then on-hook Phone 1 and connected the FiTG1 to the trunk.
, TG 2 and 2 trunks are in the waiting state, and when a vacancy occurs in any trunk group, the vacated trunk is captured in the same way as above, a dial signal is sent to the central office line 6, and the vacancy is stopped. For the caller who is currently calling, the central control section 4 notifies the subscriber circuit 2 via the subscriber control section 3 that the caller has paused, and a ringing tone is sent to the telephone 1. Here, when the calling party goes off-hook the telephone 1 within a certain period of time, this information is transmitted to the subscriber circuit 2 and the subscriber control unit 3.
The information is transmitted to the central control unit 4 via.

In this state, if the central office bids for an incoming call, the trunk 7 detects this and transmits it to the central control section 4 via the trunk control section 8. A connection instruction is sent from the central control section 4 to the communication network 9 via the communication network control section 10, and the connection between the calling telephone 1 and the central office line 6 is established. Note that if the calling party does not go off-hook within a certain period of time, this idle waiting operation is canceled.

If there is no vacancy in TG1 or TG2, a waiting time is set for each Q point.゛When this empty waiting time has passed, the empty waiting time will move to 04 points. The waiting time at the Q4 point is the waiting time for TGl, TG2゜TGs, and TGe. If a vacancy occurs in each trunk group within the vacancy waiting time set for the Q4 point, the same operation as described above will occur, but if no vacancy occurs within the vacancy waiting time, the central office line connection route at 1:00 p.m. In this case, there are no more Q points to fill, and the search stops.

At this point, the central control unit 4 once again notifies the calling telephone 1 of the state. The subsequent operation is the same as the first operation.

As described above, according to the present invention, it is not only possible to specify the length of the central office line trunk that can be used according to the priority given to the caller and the idle waiting time, but also to specify the trunk according to the area of the dial destination. It can be set according to the local time difference,
Furthermore, since trunks can be freely designated for any day of the week or date, central office line calls can be used extremely efficiently and at low rates.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of an automatic switching system according to an embodiment of the present invention, and FIGS. 2 to 6 are operation explanatory diagrams showing the connecting operation of the central office line trunk of the automatic switching system. 1...Telephone-%2...Subscriber circuit 1
3...000.1. Subscriber control unit, 4.
Central control unit, 6°... Office line X7... Office line trunk, 8... Trunk control unit, 9.
,,,,Telephone network,10,),,,,-Telephone network control unit/
11...Memo IJ-, 12...Jigoto 13, Input/output device. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 1 =〉A5-NaI7JJ4 Figure 6 Figure 1 =>J') Sasa 1,000 boxes

Claims (1)

[Claims] An automatic switching system characterized by having means for automatically selecting a central office line connection route and forming a call loop based on the central office line originating dial number from the telephone and the service priority set for each telephone.