JPS63199599A - Data transmission/reception system for digital exchange - Google Patents

Abstract

PURPOSE:To increase data transmitting speed through multiplication by the number of occupied channels by occupying plural channels subsequent to a frame signal and transmitting voice and data. CONSTITUTION:Interface circuits 2A and 2B occupying plural channels subsequent to one frame signal and transmitting and receiving voice and data, and a register circuit 4 receiving the selection signals from the interface circuits and identifying them are provided in a digital exchange. Information from an external equipment is transmitted from the interface circuit 2A to the interface circuit 2B through the path of a broken line 1 in a switch circuit 5. Furthermore, it arrives at a telephone terminal with display function 3 and is displayed on the display of the terminal. A central control circuit 6 detects the call of the terminal 3, collates to a storage device 7, confirms that the terminal 3 has the display, and connects the terminal and the register circuit 4 through the path of a solid line 2 in the switch circuit 5. If the telephone terminal 3 dials, the register circuit 4 receives and identifies it, and the central control circuit 6 controls the switch circuit 5, whereby the connection of the broken line 1 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data transmission/reception system in a digital exchange.

(Prior art) Conventionally, digital exchanges for telephone exchanges have a frequency of 300Hz~
64 k for transmission of 3.4 KHz voice band signals
It has a transmission speed of about b1ts/sea. A frame signal is created for each channel, and audio information is transmitted and received in units of 8 bits following the frame signal.

(Problems to be Solved by the Invention) In the above-mentioned conventional digital exchange, the exchange has a C
When accommodating high-performance telephone terminals with display functions such as RT and LCD, in a 64 kbit/sea channel, changes in the display will be delayed in response to operations from the terminal due to processing delays in the switching equipment. There were drawbacks. Furthermore, as the amount of information displayed increases, this delay also increases.

(Means for Solving the Problems) The data transmission and reception system of the present invention includes an interface circuit that occupies a plurality of channels following one frame signal to transmit and receive voice and data in a conventional digital exchange, and an interface circuit that transmits and receives voice and data from this interface circuit. The interface circuit includes a register circuit that receives and identifies a selection signal, and connects the interface circuits in accordance with the selection signal to transmit and receive data.

(Example) Next, examples of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing a connection system from a telephone terminal of a digital exchange to an external device in an embodiment of the present invention. 1 is a connection port from an external device connected to two interface circuits.

Information from the external device is sent from the two interface circuits to the interface circuit 2B via the switch circuit 5, and further reaches the telephone terminal with display function 3.
displayed on the display of the terminal. In FIG. 2, this connection in the switch circuit 5 is indicated by a broken line ■. This is the line that connects the terminal and the register circuit 4 after confirming that the solid line ■ is connected. In FIG. 2, if a dial is made from the telephone terminal 3, the register circuit 4 receives the dial.
The central control circuit 6 controls the switch circuit 5 to make the connection shown by the broken line (■).

FIG. 1 is a diagram showing a timing chart in the data transmission/reception system of the present invention. A represents a frame signal corresponding to conventional channel 0, and B represents a data signal. 0.1 and 2.3 of this data signal B correspond to each conventional channel (8-bit configuration), and in this embodiment, four channels are occupied and used. Here, channel 0 is always used for audio, and the remaining channels 1, 2, and 3 are used for display. If there is a selection signal PB double signal, it is sent to audio channel 0, so the register circuit receives it. C, D, and E in FIG. 1 are frame signals corresponding to conventional channels 1, 2.3, respectively, but they do not need to be used in the case of the present invention.

(Effects of the Invention) As explained above, the present invention can increase the data transmission speed by the number of occupied channels by occupying multiple channels following a frame signal in a conventional digital exchange to transmit and receive voice and data. There is an effect that can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a timing chart in the data transmission/reception system of the present invention, and FIG. 2 is a block diagram showing the connection relationship of a digital exchange according to an embodiment of the present invention. 1... Connection port from external device, 2A, 2B... Interface circuit, 3... Telephone terminal with display function, 4... Register circuit,
5... Switch circuit, 6... Central control circuit, 7
...Storage device, A...Frame signal, B...
data signal. Agent Patent Attorney Toshiyoshi Somekawa 1

Claims (1)

[Claims] an interface circuit that occupies multiple channels following one frame signal to transmit and receive voice and data;
A register circuit that receives and identifies a selection signal from the interface circuit is housed in a digital exchange, and the interface circuits are connected according to the selection signal,
A data transmission and reception method for a digital exchange that is characterized by transmitting and receiving data.