JPS58106983A - Storage control automatic telephone exchange system - Google Patents

Abstract

PURPOSE:To reduce the amount of hardware of a memory or the like of a storage control automatic telephone exchange and reduce the amount of development, by substituting the relay control with a relay control peculiar to each trunk on a basis of symmetric trunk classifications. CONSTITUTION:When a trunk to be controlled is a central office line trunk in the transition from the idle state, where an S relay and a T relay are not operated, to the dial repeating where the S relay is operated and the T relay is not operated, the control trunk is checked to discriminate the central office line trunk. As the result, the relay control is performed to operate the S relay and the T relay of the central offine line trunk, and the central offine line trunk is set to the busy state. When the trunk to be controlled is a leased line trunk, the control trunk is checked to discriminate the leased line trunk, and the relay control is substituted with the control of operation of S and T relays of the leased line trunk and release of an X relay on a basis of relay control information (operation of the S relay and the T relay) of the central office line trunk, and the system enters into the originating service state of the leased line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trunk relay control system in a product-controlled automatic telephone exchange system.

In general, the number of relays in a trunk in an accumulation control automatic telephone exchange is determined by the type of trunk, that is, the number of functions the trunk has, and the combination of operating and non-operating status of each relay can be determined on a map. This easily illustrated diagram is generally called a Karnaugh map.

Figure 1 shows an example of a Carnot map of a central office line trunk.
In this case, there are two relays, an S relay and a T relay.2. Ka1 diagram world's first S relay, T relay joint failure-1
The work is empty, the S relay works, the T relay does not work, the dial relay,
Co-operation of S relay and T relay indicates a telephone call.

The second [S1] shows the Carnot map of the dedicated side 1, and the wholesaler, the result of the trunk in figure 1 is the HsL fertilization egg. 3rd minute student 11+ is required, and since the phrase for sending the busy sound is added, three relays, S relay, T relay, and X relay are required. operation, T relay operation, X relay non-operation, and incoming calls are S
Relay operation, T relay operation, and X relay operation.

FIG. 3 is a diagram showing an example of a change in the call bus in the space-division accumulation control automatic telephone exchange when the office line trunk shifts from the dial relay state to the call state after completion of the dial relay. In the figure below, in the dial relay state 1, it is an extension! , the Atayal pulse from the handset A is received by the register trunk RT via the path ■, and the received pulse is sent out from the originating sender trunk O8T,
And it will be sent to the central office line via the path (2) and the central office line trunk COT. Next, Sakaki A talks about the details of the 2nd call.
It is connected to the central office line trunk COT K via path O.

Figure 4 is a diagram showing the transition of the private line trunk to the same state as the office line trunk shown in Figure 3. The status is 1012 and the outgoing call is 102.

Figure 5 shows the content of the control that should be performed when transitioning from state n1 in Figure 3 to state 2, and Figure 6 shows the content of the control that should be performed when transitioning from state n1 in Figure 3 to state 10 in Figure 4.
5 and 6 show the details of the control that should be performed when transitioning from state 1 to state 102. Comparing FIG. 5 and FIG. 6, the difference is in the relay control part, and the rest are all four-way control.

Conventional control methods require completely separate control from time to time, even when the only difference is relay control, as in the example above.As the amount of nodes such as memory increases, development costs also increase. It was uneconomical.

In order to overcome the drawbacks of the prior art described above, the present invention provides an economical method for reducing the amount of hardware such as memory and the development cost of an automatic military communication machine with storage control. For. Therefore, the state in the dedicated line trunk in Figure 1rlffi4 is integrated with the I/C status in the central office line trunk in Case 3M, and the central office line trunk relay system a (1 in Figure 5) and the dedicated trunk relay wholesale control (in Figure 6) are integrated. 1) is controlled separately at each connection, and other path systems a (2 to 4 in Figure 5 and 2 to 4 in Figure 6)
This solves the drawbacks of the conventional method by integrating the bus system ML (2 to 4 in Figure 5) of the central office line trunk and performing the same path control at each connection.

The present invention will be specifically explained below with reference to embodiments shown in the drawings.

FIG. 7 is a diagram illustrating central office line trunk control and leased line trunk control according to an embodiment of the present invention.

If the trunk to be controlled at the time of transition from the empty state in Figure 1 where both the S relay and T relay are inactive to the S relay in operation and dial relay with the T relay inoperable is a central office line trunk, the central office line trunk in Figure 7 The control trunk is checked during control 4 and determined to be a central office line trunk.

As a result, Tate 5 performs relay control of the S relay operation and T relay operation of the COT shown in FIG. 1, and shifts the central office line trunk to a communication state. When the trunk to be controlled is a leased line trunk, the control trunk is checked and the leased line is determined. Based on the relay control information (S relay operation, T relay operation) of the office line trunk, the TT After the S and T relays operate and the X relay recovery control is activated, the dedicated line enters the outgoing call state.

TsubaAs mentioned above, according to the conventional technology, when the relay operation status inside each trunk for the same function differs between different types of trunks in a load control automatic telephone exchange, nodes such as memory However, according to the present invention, these problems can be easily reduced and an economical power system can be constructed.

Furthermore, the present invention is effective regardless of whether the communication path is space-divided or time-divided.

[Brief explanation of the drawing]

The figures are the same as the storage control automatic telephone switching system according to the present invention. Figure 2 shows an example of the change in the telephone path in a private line trunk, and Figure 2 shows an example of the change in the telephone path in a dedicated line trunk. Figure 6 shows the control details when transitioning from state 117) in Figure 3 to state 2. Figure 6 is 1 in Figure 4.
Figure 7 is a diagram showing the contents of control at the time of transition from state 01 to state 102, and is a diagram showing central line trunk control and leased line trunk control according to an embodiment of the present invention. Explanation of codes A...Extension telephone RT...
Register trunk 08T-Fist...Outgoing sender trunk COT voice! ...Φ・Directory line trunk TT-...0 Dedicated line trunk agent Susuki 1) Toshiyuki Figure 7 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] Relay operation status inside each trunk for the same period in different types of trunks of storage control automatic telephone exchange
7) In the case of 2) when trunk relay analysis is performed, the storage control automatic telephone switching system is characterized by a system in which the relay control is linked to the relay control unique to each trunk according to the symmetrical trunk percentage.