JPH0583372A - Private branch exchange - Google Patents

Abstract

PURPOSE:To perform the congestion control in a local processor while a local processor considers the operation rate of a main processor. CONSTITUTION:In a main processor part 100, an operation rate counting part 102 counts the operation rate data of a control part 101. On the other hand, in a local processor part 104 for control an extension, a congestion level analyzing part 106 to analyze the operation rate data when the change received from a control part 105 and the main processor part 100 is performed is equipped and by the analyzed result, to the new non-transmittable extension at the time of detecting the off-hook, the busy informing processing is performed and the convergence control is performed by a busy tone sending part 108.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange.

[0002]

2. Description of the Related Art Conventionally, in a private branch exchange, congestion control is performed by the main processor after the operation rate is determined by the main processor or after the number of received events per hour is determined, and the event from the local processor is ignored. Was there. Alternatively, congestion control such as interruption of data transmission to the main processor is performed after the local processor determines an event that occurs per hour.

[0003]

However, in the above-mentioned conventional method, when the main processor performs the entire process of congestion control, the operation rate is further increased due to the congestion control, or the congestion is recovered when the number of events causes congestion. There is a problem that it is difficult to judge the timing of time and the congestion time is extended and the user has a bad impression.When performing congestion control in the local processor, congestion control works regardless of the operating rate of the main processor. However, there was a problem that he could not make a call although he had the ability.

In view of the above-mentioned prior art, it is an object of the present invention to provide a private branch exchange in which a local processor controls congestion in the local processor while considering the operating rate of the main processor.

[0005]

The private branch exchange of the present invention comprises:
A main processor unit having an operation rate calculation unit for calculating the operation rate of the processor, a congestion level analysis unit for receiving the operation rate from the main processor unit and determining whether to execute congestion control, and a busy tone transmission for transmitting a busy tone at the time of congestion. And a plurality of local processor sections each having a hook detection section for detecting a hook of an extension telephone.

[0006]

According to the present invention, the operation rate is calculated stepwise in the operation rate calculation section of the main processor section, and when there is a change in the operation rate, the intention is transmitted to the local processor section. In the department, the congestion level analysis unit automatically adjusts the extension that can be transmitted according to the operating rate of the main processor unit, and for the extension that cannot be newly transmitted, from the busy tone transmission unit when the hook detection unit detects off-hook. Congestion control is performed by performing busy notification processing such as sending a busy tone.

Therefore, since congestion control in the main processor section is eliminated, operating efficiency is improved and congestion is less likely to occur, and the local processor section performs congestion control in consideration of the operating rate of the main processor section. Congestion control becomes possible, the congestion control is distributed, and the operation rate is transmitted at any time, so that the recovery time at the time of congestion is shortened, and the performance is significantly improved.

[0008]

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

FIG. 1 is a block diagram showing the configuration of a private branch exchange according to an embodiment of the present invention, FIG. 2 is a flow chart for determining an operating rate in a main processor unit, and FIG. 3 is a flow chart when a congestion level is received in a local processor unit. 4 is a flow chart of transmission control in the local processor unit, FIG. 5 is an operation rate stage evaluation table of the main processor unit, and FIG. 6 is a congestion level analysis table of the local processor unit.

In FIG. 1, 100 is a main processor section, 101 is a control section of the main processor section 100, 102 is an operation rate calculation section for calculating the operation rate of the control section 101, and 103 is an operation rate calculation section 102. A storage unit that stores an operating rate, 104 is a local processor unit for extension control, 105 is a control unit of the local processor unit 104, and 106 is a main processor unit 100.
The congestion level analysis unit for analyzing the received operation rate data, 107 is a storage unit for storing the data of the result analyzed by the congestion level analysis unit 106, 108 is a busy tone transmission unit for transmitting a busy tone, and 109 is an extension telephone off-hook. , A hook detection unit that detects on-hook and the like.

The operation of the private branch exchange of the present embodiment constructed as described above will be described below with reference to FIGS.

In FIG. 2, when the operation rate calculation unit 102 reads the operation rate of the control unit 101 in the main processor unit 100 (step 201), the operation rate calculation unit 102 uses the operation rate stage evaluation table (FIG. 5) as a basis. The operation rate level is calculated in the storage unit 10
Compare with the previous utilization level held in 3 (step
202). If the operating rate level has changed (YES in step 202), the control unit 101 transmits the operating rate level to the control unit 105 of the local processor section 104 for extension control (step 20).
3), set the operating rate level in the storage unit 103 (step 20
Four).

In FIG. 3A, the local processor unit 1
When the control unit 105 of 04 receives the change data of the operation rate level (step 301), the congestion level analysis unit 106 refers to the congestion analysis table (FIG. 6) to refer to the operation state of the main processor unit 100 at that time. Then, the number of transmission-permitted extensions is determined (step 302) and stored in the storage unit 107 (step 303) as in the data example of FIG. Here, as shown in FIG. 6, if the congestion analysis table (FIG. 6) is set for each of the plurality of local processor units, the number of extensions that can be used during congestion is given priority among the local processor units. It is also possible to decide.

In FIG. 4, since the number of extensions that can be transmitted is set at any time as described above, when the hook detector 109 detects an off-hook of the extension telephone (step 401), the controller 105
Refers to the data of the callable extension stored in the storage unit 107, and determines whether the extension that is off-hook is currently callable or the call is prohibited by congestion control. If the call can be made (NO in step 402), a normal call operation is performed (step 403). If the call cannot be made (YES in step 402), the busy tone is sent using the busy tone sending unit 108 to control congestion. Is performed (step 404).

[0015]

According to the present invention, since congestion control in the main processor section is eliminated, operating efficiency is improved and congestion is less likely to occur, and congestion control is performed by the local processor section in consideration of the operating rate of the main processor section. As a result, system-like congestion control becomes possible, congestion control is distributed,
Also, since the operating rate is transmitted at any time, the recovery time at the time of congestion can be shortened, and it is possible to provide a private branch exchange with significantly improved performance and serviceability.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a private branch exchange according to an embodiment of the present invention.

FIG. 2 is a flow chart of operation rate determination in the main processor unit of the present embodiment.

FIG. 3 is a flowchart when a congestion level is received by a local processor unit of this embodiment.

FIG. 4 is a flowchart of transmission control in a local processor unit of this embodiment.

FIG. 5 is an operation rate stage evaluation table of the main processor unit of the present embodiment.

FIG. 6 is a congestion level analysis table of a local processor unit of this embodiment.

[Explanation of symbols]

100 ... Main processor section, 101, 105 ... Control section, 102
... operating rate calculation unit, 103, 107 ... storage unit, 104 ... local processor unit, 106 ... congestion level analysis unit, 108 ... busy tone transmission unit, 109 ... hook detection unit.

Claims (1)

[Claims] 1. A main processor section having an operation rate calculation section for calculating an operation rate of a processor, a congestion level analysis section for receiving an operation rate from the main processor section and determining whether or not to execute congestion control, and a busy tone during congestion. Is provided, and a plurality of local processor units having a hook detection unit that detects a hook of an extension telephone, and the operation rate calculation unit evaluates the operation rate stepwise,
And when there is a change in the operating rate, it is sent to the local processor section, and the local processor section automatically adjusts the extension that can be transmitted according to the operating rate of the main processor section, and the congestion level analysis section automatically adjusts to prevent new transmission. The private branch exchange is configured so that, when an off-hook is detected by the hook detection unit, the busy tone transmission unit performs busy notification processing to perform congestion control for the extension.