JPS634396B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an incoming call distribution control system in a distributed control automatic switching system.

Conventional centralized control type automatic switching equipment has a system-common temporary storage memory, and when an incoming call from an extension or trunk is detected, the incoming call information is stored in the system-common temporary storage memory. For this reason, adding more extensions and trunks necessarily requires adding more common parts of the system. Furthermore, if common temporary storage memories are provided for the maximum number of lines that can be accommodated in the system, the smaller the number of lines, the more uneconomical it becomes. In addition, the conventional system has the disadvantage that if a failure occurs in the memory, memory writing/reading circuit, etc., it will affect all lines.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide an incoming call distribution control system suitable for a distributed control system.

The present invention provides means for detecting incoming calls in response to a signal control processor that controls signals for extension lines, central office lines, dedicated lines, and central line relay boards of an exchange, and a temporary storage memory having means for storing incoming call information. means for detecting an incoming call distribution request operation from a central office line relay board and requesting distribution of incoming call information, and detecting an incoming call distribution request by the incoming call distribution requesting means in response to a connection control processor; By providing means for distributing incoming call information and further connecting means for storing distribution order information of incoming call information to the information transfer bus, it is possible to control the distribution of incoming calls even if one signal control processor fails. does not affect all lines. Further, by providing only the distribution order information in a temporary storage memory common to the system, the distribution processing of incoming calls can be performed equally for each signal control processor. Further, if a failure occurs in the temporary storage memory, memory writing/reading circuit, etc., the connection control processor may distribute incoming calls in a predetermined order. Therefore, it is possible to obtain an incoming call distribution control system for an automatic switching system that simplifies the expansion of the number of lines and is highly reliable against failures.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the invention.
Fig. 2 is a block diagram of the signal control device (processor) shown in Fig. 1, Fig. 3 is a block circuit diagram of the connection control device (processor) shown in Fig. 1, and Fig. 4 is a block diagram of the signal control device (processor) shown in Fig. 1. It is a temporary storage device common to the system.

In FIG. 1, a signal control device 101 includes a signal control processor, a fixed memory that stores a program for signal control, a temporary memory that stores information necessary in the control process, and a control device that controls devices related to signal control. Contains a circuit. The connection control device 102 includes a connection control processor, a fixed memory that stores a program for connection control, a temporary storage memory that stores information necessary in the control process, and a control circuit that controls devices related to connection control. include.

First, an incoming call to trunk 108, extension subscriber 1
When the signal control device 101 detects the call of the office line relay stand operator from 07 and the re-call of the office line relay stand operator,
The accommodation position information, control information, etc. of the received terminal are sent to the connection control device 102 via the bus interface circuit 103, the information transfer bus 105, and the bus interface circuit 104. In this connection control device 102, accommodation position information, control information, etc. sent from the signal control device 101 are received by a receiving circuit 301 shown in FIG. 3, and necessary information as incoming call information such as call type information and tenant information is received. All are determined by the determination circuit 302 and stored in the latch register 303, and sent to the signal control device 101 that detected the incoming call by the sending circuit 304, bus interface circuit 104, information transfer bus 105,
It is returned via the bus interface circuit 103. On the other hand, the signal control device 101 stores the above-mentioned incoming call information in a temporary storage memory 110 provided corresponding to the signal control processor. If each terminal recovers due to abandonment before being distributed with incoming calls, the temporary storage memory 110 is searched based on accommodation position information and the incoming call information of that terminal is deleted.

In addition, when the telephone key information receiving circuit 201 shown in FIG. 2 detects that the telephone key information receiving circuit 201 shown in FIG. Yes, when the clock circuit 202 detects that a certain period of time has elapsed, the telephone key information identification circuit 203 and the time activation determination circuit 20 respectively
4, and transmits the incoming call distribution request information to the transmitting circuit 2.
05, bus interface circuit 103, information transfer bus 105, bus interface circuit 104
It is sent to the connection control device 102 via. In the connection control device 102, the bus interface circuit 1
04, the distribution order information is read out from the temporary storage memory 405 through the receiving circuit 401 and memory reading circuit 403 shown in FIG. Return with 404. The connection control device 102 reads one piece of incoming call information from the temporary storage memory 110 via the signal control device 101 corresponding to the distribution order information. Next, a determination circuit 302 shown in FIG. 3 determines whether the central line relay board 109 can handle the read incoming call.
If possible, control the communication path 106 to reserve the incoming terminal and the office line relay stand 109, and transmit the lamp control information of the office line relay stand 109 to the receiving circuit 20.
6. The signal is sent to the lamp control circuit 208 via the latch register 207, and an incoming call is displayed on the office line relay board 109.

On the other hand, if the central office line relay board 109 is unable to handle the call information, the read incoming call information is returned to the temporary storage memory 110, new and different incoming call information is read out, and the same process is repeated. Note that if there are no incoming calls that can be handled by one signal control device, the signal control device number is updated and the process is repeated. When one incoming call distribution process is completed, the connection control device 102 passes through the bus interface circuit 104, the information transfer bus interface circuit 111, and the receiving circuit 401 shown in FIG. Temporary storage memory 4 for device number
Write it in 05 and memorize it. Furthermore, if a failure occurs in the bus interface circuit 111 or the system common temporary storage device 112, distribution control is performed in a predetermined order.

One embodiment of the present invention has been described above, and although the communication paths are connected and considered as one exchange in FIG. 1, the present invention can also be applied when the communication paths are separated and considered as multiple exchanges. is obvious. Further, although one signal control device and one connection control device have been selected in the explanation, it is clear that the present invention can be applied even when there are a plurality of each device. Note that the accommodation of extension lines, office lines, dedicated lines, and office line relay boards is merely an example.

As explained above, the present invention stores incoming call information in a temporary storage memory provided corresponding to a signal control processor, and provides only the distribution order in a system common temporary storage device. This has the effect of realizing incoming call distribution control of an automatic switching system that can evenly distribute calls, is resistant to failures, and has high reliability.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention, FIG. 2 is a block circuit diagram of the signal control device shown in FIG. 1, FIG. 3 is a block circuit diagram of the connection control device shown in FIG. 1, and FIG. This figure is a block circuit diagram of the system common temporary storage device shown in FIG. 1. 101... Signal control device, 102... Connection control device, 103, 104, 111... Bus interface circuit, 105... Information transfer bus, 106
...Call path, 107... Extension subscriber, 108...
Trunk, 109... Office line relay board, 110... Temporary storage memory, 112... System common temporary storage device.

Claims (1)

[Claims] 1. At least one signal control processor that performs signal control of terminals including extension lines, central office lines, private lines, and central office line relay boards connected to the communication network, and at least one connection that performs mutual connection control between the terminals. In an incoming call distribution control method in a distributed control automatic switching system having a control processor and an information transfer bus for transferring information between the signal control processor and the connection control processor, An incoming call detecting means for detecting an incoming call to the automatic exchange; a temporary storage means for temporarily storing incoming call information of the incoming call; distribution request means for requesting distribution of incoming call information; distribution order information storage means provided commonly in the automatic exchange and connected to the information transfer bus and storing distribution order information of the incoming call information; distribution request detection means for detecting a distribution request for incoming call information from the signal control processor provided corresponding to the connection control processor; distribution order information reading means for reading distribution order information from the distribution order information storage means; When detecting a request for distribution of incoming call information from the signal control processor, the system comprises incoming call information reading means for reading incoming call information from the control processor and incoming call distribution means for distributing the incoming call to the central line relay stand. An incoming call distribution control system, characterized in that incoming call information is read from a signal control processor corresponding to the distribution order information of the distribution order information storage means and the incoming call is distributed to the central office line relay stand.