JP3033656B2 - Outgoing and incoming call control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outgoing / incoming call control system for controlling a collision between an outgoing call and an incoming call generated at the time of calling in a stored program control type switching apparatus.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing an example of an incoming / outgoing call control method in a conventional stored program control type switching device.

[0003] Referring to FIG. 3, a conventional outgoing / incoming call control system includes a communication control device 30 for controlling communication of a line group 31;
A central processing unit 32 executes various application services.

The central processing unit 32 has a line status management means 33 for managing the availability / in use of the line and a scheduling means 3
4 is provided.

In this system, call control is performed by the central processing unit 32.
This was performed by the scheduling method (LOOK IN) on the side.

Next, the operation of this conventional example will be described.

The line status management means 3 in the central processing unit 32
Numeral 3 manages the availability / in use of the line in the line group 31.

[0008] scheduling means 34 searches the call subject to monitor the line status periodically by scheduling scheme regardless during idle / use of the line, the central processing unit 32 side when there is a call request Originates a call to the line group 31.

Further, even when all the lines of the line group 31 on the communication control device 30 side are in use, the central processing unit 32 performs the schedule processing for call control.

[0010]

The outgoing / incoming call control method in the conventional stored program control type switching apparatus is a schedule method based on periodic activation of the central processing unit.

Therefore, even if all the lines on the communication control device side are in use, the schedule processing for calling control is performed. In this case, there is a problem that the load on the central processing unit increases because the meaningless processing for determining the call request target is performed.

It is an object of the present invention to employ a method (polling method) of inquiring a communication request from the communication control device to the storage program control type switching device when the communication line is idle, thereby reducing the load on the central processing unit. An object of the present invention is to provide an outgoing / incoming call control method for reducing the number of calls.

[0013]

According to the present invention, an outgoing / incoming call control in a system comprising a communication control device connected to a communication line and a stored program control type exchange device connected to the communication control device. In the method, the communication control device is periodically activated so that the communication line is being received,
Manages the line status during distribution, and if the communication line is idle
For example, a polling request is periodically issued to make a queue search request to the stored program controlled switching device to inquire whether there is a call request, and the central processing unit of the stored program controlled switching device manages the call request. And a call control system for controlling a collision between the call request and the call from the communication line .

[0014]

[0015]

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

FIG. 1 is a block diagram showing an embodiment of an outgoing / incoming call control system according to the present invention, and FIG. 2 is a flowchart showing the flow of outgoing call processing in FIG.

Referring to FIG. 1, an outgoing / incoming call control system according to the present embodiment employs a communication control device 10 connected to a communication line 11.
And a storage program controlled exchange device 20 connected to the communication control device 10.

Then, the storage program controlled exchange device 2
0 has a central processing unit 21 and a communication control device 10
Is a line management means 12 for detecting an incoming call from the communication line 11
A line state management unit 13 for managing the line state of the communication line 11 during incoming and distribution, and a polling unit 14 for inquiring of the central processing unit 21 about the presence or absence of a call request when an incoming call from the communication line 11 is detected. And the central processing unit 2
1 is a call request queue 23 for loading a call request, a call request management means 22 for managing the call request queue 23,
Outgoing / incoming call management means 24 for controlling collision between an outgoing call request and incoming call
And

Next, the operation of this embodiment will be described with reference to FIG.

Line state management means 1 in communication control device 10
3 are started periodically (step 301).

If the line status is empty (S302)
YES), the line state management means 13 periodically makes a polling request to the polling means 14 in the communication control device 10, and the polling means 14 receives the polling request and manages the call request management in the central processing unit 21. A queue search request is sent to the means 22. And call request management means 2
In step 2, the presence / absence of a call request stored in the call request queue 23 is searched (S304).

In the central processing unit 21, the call request queue 2
3 is loaded with a call request (YE at S305)
S), the outgoing / incoming call management means 24 makes a call request to the line state managing means 13 in the communication control device 10 (S306).

If there is no incoming call when this call request is made (NO in S 308), in the communication control device 10, the line status management means 13 transmits the communication line 1 via the line management means 12.
Call 1 (S310).

When a call request is made in S306, the line management means 12 in the communication control device 10
When an incoming call is detected (S307), the incoming call is interrupted.

That is, since this incoming call is accepted by the line state management means 13, there is an incoming call (YES in S308).

[0026] Then, the call request in S306 is issued clothes
It is returned to the call management means 24 (S309).

When the result is NO in S302 (when there is no free line) and when the result is NO in S305 (when there is no call request), the processing of the central processing unit 21 ends.

[0028]

As described above, the present invention employs a polling method in which the communication control device inquires the stored program control type switching device of a communication request when the communication line is idle, thereby reducing the load on the central processing unit. This has the effect of reducing the amount of light.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of an incoming / outgoing call control system of the present invention.

FIG. 2 is a flowchart showing a flow of a calling process in FIG. 1;

FIG. 3 is a block diagram showing an example of an incoming / outgoing call control method in a conventional stored program control type switching device.

[Explanation of symbols]

 10, 30 Communication control device 11 Communication line 12 Line management means 13, 33 Line state management means 14 Polling means 20 Stored program controlled switching device 21, 32 Central processing unit 22 Call request management means 23 Call request queue 24 Call arrival / departure Management means 31 Line group 34 Schedule means

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04Q 3/545 H04M 3/00 H04M 3/22 H04M ⁷ /00-7/16 H04Q 3/42 101-107 H04Q 3 / 58 101-107

Claims (1)

(57) [Claims] 1. A communication control device connected to a communication line,
In an outgoing / incoming call control system in a system including a communication control device and a stored program control type switching device connected to the communication control device, the communication control device is periodically activated so that the line status of the communication line being received and being distributed is received. And if the communication line is free, periodically issue a polling request, make a queue search request to the stored program controlled switching device and inquire whether there is a call request, and check whether the stored program controlled switching device A call control system, wherein a central processing unit manages the call request and controls a collision between the call request and a call from the communication line.