JPH04117750A - Communication equipment - Google Patents

Abstract

PURPOSE:To suppress the communication time to be a required minimum time by taking respective states of a master equipment and an external equipment into account during communication and at the start of communication so as to make the communication at the best condition. CONSTITUTION:When a master set 1 detects the arrival of a call, the master set 1 checks a communication condition such as its own communication speed, resolution and coding processing. Succeedingly the communication condition of an external device is checked and the communication of a protocol signal is implemented to a caller to check the communication condition at the caller side. Then respective communication conditions are compared to decide an equipment to make actual communication. Moreover, when an error or a fault takes place during the communication and it is detected by the master set, the communication condition of the other equipment is checked to decide the communication condition so as to minimize the revision in the communication condition. Thus, the communication with a required minimum time is attained by using more communication condition among various communication conditions from the start of one communication till its end.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication device to which five communication devices can be connected as external devices.

[Prior Art] Conventionally, a device is configured to communicate with either a main device or an external device.

[Problem to be solved by the invention] However, in the above-mentioned conventional example, each of the communicating main device or external device communicates independently.
It has not been possible to effectively utilize the other device.

[Means for Solving the Problems] According to the present invention, both states of the main device and the external device are taken into consideration during communication, so that the device with the best conditions can perform communication with the best conditions. This is what I did.

Embodiment FIG. 1 is a block diagram of a device embodying the present invention. In the figure, 1 is a main device and 2 is an external device. 11 is a control section, 12 is a communication section, and 13 is a switch.

Next, the operation of the embodiment of the present invention will be explained with reference to the above configuration and the flowcharts of FIGS. 2 and 3.

First, when the main device 1 detects an incoming call (S1), the main device 1 checks its own communication conditions (hereinafter referred to as "communication conditions") such as communication speed, resolution, minimum transmission time, and encoding (S2).

Next, the communication conditions of the external device are checked (S3). It also communicates procedure signals with the originating side and checks the communication conditions of the originating side. Then, the respective communication conditions are compared (S4), and a device with which communication is to be actually performed is determined (S5).The determined device then performs communication.

That is, when communicating with the main device, the control section 1 controls the switch 13 to connect the outside line and the communication section 12. on the other hand,
When communicating with the external device 2, connect the outside line and the external device 2.

In step S4, the control unit 11 calls the external device 2 and receives a procedure signal from the external device 2, thereby
It is also possible to check the communication conditions of the external device 2.

Furthermore, if some kind of error or abnormality occurs in the communicating device during communication, and the main device detects it (S7
), the communication conditions of the other device are checked (S8), and the communication conditions are determined so as to minimize changes in the communication conditions (S9). As a result, more communication conditions can be set among various communication conditions from the start to the end of one communication, and communication can be performed in the minimum necessary communication time.

In other words, even if communication is being performed with the external device 2,
The control unit 11 of the main device 1 grasps the communication conditions according to the determination in step 5. If communication is being performed by the external device H2, the main device Nl determines the communication conditions of the communication unit 12 in accordance with the communication conditions of the external device 2 during communication. Then, the control section 11 controls the switch 13 to connect the outside line and the communication section 12, and continues communication.

On the other hand, when communication is being performed by the main device 1, the main device 1 communicates procedure signals with the external device 2, and the communication section 12 changes the communication conditions of the external device W2 according to the communication conditions being executed. Set. And, the M both parts 11 are the outside line and the external device 2.
Connect.

[Effects of the Invention] As explained above, by enabling both the main device and the external device to communicate at all times, there is an effect that the communication time can be reduced to the minimum necessary time.

[Brief explanation of drawings]

Figure 1 is a system configuration diagram of an embodiment of the present invention, Figures 2 and 3.
The figure is an operation flowchart of an embodiment of the present invention. In the figure, the main device 2 is an external device. Applicant Canon Co., Ltd.==7 Agent Gi Marushima −(−・−. Tsuno Kei Nishiyama 3 −・−1.

Claims (1)

[Claims] A communication device to which a communication device can be connected as an external device is characterized in that the respective states of the main device and the external device are considered during and during communication to enable communication under the best conditions.