JPH06121031A - Using method for isdn primary group speed interface - Google Patents

Abstract

PURPOSE:To provide the using method for ISDN primary group speed interface where terminal apparatus using plural B channels can preferentially use them and the use efficiency of the whole of a system including voice speech is best. CONSTITUTION:Electronic exchanges 3A and 3B are provided with central control means 6A and 6B, clock circuits 7A and 7B, and storage means 8A and 8B. For example, first six channels are set to the preferential use state of video conference systems 4 in a desired time zone in the primary group speed interface by the electronic exchange 3A. Video conference systems 4 preferentially use first six channels in the set time zone; and in the case of a telephone call, an idle channel is searched from channels following the seventh and if any, it can be used for originating a call.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic exchange that accommodates a primary group speed interface of ISDN (Integrated Service Digital Network) as a central line and uses a single B channel (64 kb / s) on the extension side. The present invention relates to a method for controlling B channel utilization when accommodating a plurality of B channels (terminal speeds that use n times 64 kb / s) in a mixed manner.

[0002]

2. Description of the Related Art ISDN primary rate interfaces include an H0 channel that is a group of 6 B channels and an H1 channel that is a group of 24 B channels.

Instead of subscribing to a large number of B channels as a central line of an electronic exchange, in order to reduce the contract fee for the ISDN network, a small number of the above ISDN primary rate interfaces are contracted and a single B channel ( 64 kb /
s) using a terminal device (for example, a telephone) and a plurality of Bs
A method of accommodating terminal devices that use channels (for example, a video conference system that uses an H0 channel in which six B channels are integrated) is mixed and accommodated. In this method, a plurality of B channels must be fixedly secured in advance for a terminal device that uses a plurality of B channels, such as a video conference system.

[0004]

However, in general,
The ISDN primary group speed interface on the office line side shares the B channel with the voice call by the telephone, and if the frequency of the call is high, there may be a case where there are no 6 channels available for the TV conference system. In this case, the video conference system waits until 6 channels are available. On the contrary, if 6 channels are always reserved for the video conference system, the number of B channels that can be used for the voice call will decrease even if the frequency of the video conference system is low. Become. In the case of the H0 channel, it is completely dedicated to the video conference system.

The present invention solves the above conventional problems, and includes a system including a terminal device that uses a plurality of B channels and a terminal device that uses a single B channel (for example, a telephone). It is an object of the present invention to provide a method for effectively using the B channel of the ISDN primary rate interface as a whole.

[0006]

In order to achieve the above object, the present invention provides an electronic exchange that accommodates an ISDN primary group speed interface as a central line, by an automatic operation by time setting or a special number operation from a telephone. A plurality of channels of the primary group interface are reserved for a desired terminal device in a necessary time zone so that the terminal device can be preferentially used.

[0007]

Therefore, according to the present invention, it is possible to preferentially use a terminal device that uses a plurality of B channels, if necessary.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a communication system using an electronic exchange having an ISDN primary rate interface as a local line in one embodiment of the present invention, and FIG. 2 is a usage state diagram of terminal equipment for a primary rate interface B channel.

In FIG. 2, the state A is CH1 to CH24.
, Each indicate a B channel (64 kb / s).

In FIG. 1, a head office 1 and a branch office 2 are respectively provided with electronic exchanges 3A and 3B, video conference systems 4A and 4B which are terminal devices of H0 channel, a plurality of telephones 51 to 5k, and telephones 5m to 5s. It is equipped. The electronic exchanges 3A and 3B have central control units 6A and 6B, clock circuits 7A and 7B and storage units 8A and 8B.
B is provided. Electronic switch 3A at head office 1 and branch 2
And 3B are connected via ISDN by ISDN primary rate interfaces 9A and 9B.

The primary group speed interfaces 9A and 9B of the electronic exchanges 3A and 3B are the electronic exchanges 3A and 3B.
B is automatically switched to either the state A or the state B in FIG. 2 for use. In state A, 23 channels (24 channels if D channel is shared) are used for the video conference systems 4A and 4B and telephones 51 to 5 respectively.
It is a normal state in which it can be used evenly with the k and telephones 5m to 5s.

On the other hand, the state B is a state in which the first 6 channels are reserved for the video conference systems 4A and 4B and can be used preferentially, and the telephones 51 to 5k and the telephones 5m to 5s have these 6 channels. Can not be used. In other words, it can be used only on channels 7 and above. The two states A and B can be automatically switched at a preset time by the central control units 6A and 6B of the electronic exchanges 3A and 3B. This time is set in the storage units 8A and 8B and compared with the clock circuits 7A and 7B, respectively.

The method of using the primary group velocity interface in the above configuration will be described with reference to the process flow chart of the central control units 6A and 6B shown in FIG. For example, assume that the first six channels from 10:00 to 12:00 are set to the state B in which the video conference systems 4A and 4B can preferentially use them.

First, at 9 o'clock, the telephones 51 to 5k and the telephone 5
When making a call from any of m to 5 s, this time is not set to the priority use state for the video conference systems 4A and 4B, and therefore the process proceeds from step 11 to step 16. In the case of 9 o'clock, since it is in the state A, it proceeds to steps 16 to 17 to search for an empty channel from channel 1. If it is available, the channel can be used to make an outgoing call (step 18). Similarly, when an attempt is made to hold a video conference by the video conference system 4, the process proceeds from step 11 to step 12 to step 13 to check whether or not 6 channels are available. For example, 2 on the phone
If 0 channels are used, there is no free space for 6 channels, so the video conference system 4 cannot make a call. On the other hand, if there are 6 channels available, the video conference system 4 can use these 6 channels (step 14) to make a call.

[0016] Next, taking 11:00 as an example, at this time, since the priority use state B of the video conference system 4 is set, when the telephone 5 is to be called, steps 11 to 16 are performed. After that, the process proceeds to 19 to check the vacancy of channels 7 and after. That is, channels 1 to 6 cannot be used. On the contrary, when a video conference is held, the process proceeds from step 11 to step 12 to step 15, and the conference can be surely held by preferentially using channels 1 to 6.

The transmission operation is as described above,
The same applies to the incoming call operation, so the description thereof will be omitted.

By thus setting the time zone that gives priority to the video conference system 4, the system of the electronic exchange 3 can be efficiently operated as a whole.

For convenience of description, the video conference system is used here, but the same applies to other terminal devices using a plurality of B channels. In addition, although the first 6 channels are assigned to the priority channels here, any 6 channels may be assigned, and 6 channels may be assigned depending on the type of the terminal device.
It goes without saying that a plurality of channels other than the channels may be assigned. Furthermore, although it has been described that the switching is automatically performed at the time, the same effect can be obtained even if the switching is performed by a special number operation from the telephone. In addition to the above, the present invention can be modified in various ways without departing from the basic technical idea thereof.

[0020]

As described above, according to the present invention,
Since terminal equipment (for example, a video conference system) that uses a plurality of B channels can be preferentially used as necessary by setting, the use efficiency of the entire electronic exchange system including voice call should be optimized. You can

[Brief description of drawings]

FIG. 1 is an ISDN as a local line in an embodiment of the present invention.
Communication system configuration diagram by electronic exchange having primary group speed interface

FIG. 2 is a usage state diagram of terminal equipment for the primary group velocity interface B channel.

FIG. 3 is a processing flowchart of central control units 6A and 6B.

[Explanation of symbols]

 3A, 3B Electronic switch 4A, 4B Video conference system 51-5k, 5m-5s Telephone 6A, 6B Central control unit 7A, 7B Clock circuit 8A, 8B Storage unit

Claims (2)

[Claims] 1. An electronic exchange containing an ISDN primary group speed interface as a station line, wherein, when accommodating a terminal device using a plurality of B channels on the extension side, the primary group speed interface of the above-mentioned primary group speed interface is preset in a specific time zone. A method of using an ISDN primary rate interface, characterized in that the required number of B channels is reserved from among them so that a terminal device using the plurality of B channels can preferentially use it. 2. An electronic exchange, which accommodates an ISDN primary rate interface as a central office line, has a special number operation from a telephone to accommodate a terminal device that uses a plurality of B channels on an extension side in a specific time zone. The ISDN primary rate interface is characterized in that the required number of B channels are reserved from the primary rate interface so that a terminal device using the plurality of B channels can preferentially use them. How to use.