JPH039631A - Line speed switching control system for time division line exchange - Google Patents

Abstract

PURPOSE:To reduce a load on an exchange by connecting a speed conversion trunk to the exchange in the case of the connection between terminals operated at different speed, and performing the accumulation control processing of a communication telegram at a communication state with the trunk. CONSTITUTION:The exchange 1, in the case of receiving a selection signal from the terminal 51 to the terminal 52 with different speed, issues a call to the control line 13 of the speed conversion trunk 2. When a response from the trunk 2 is confirmed, the terminals 51 and 52 inform the line speed informa tion to the trunk 2 via the control line 13, and also, the exchange 1 issues the call to a communication channel 11 to connect between the terminal 52 and the communication channel 11 of the trunk 2. The exchange 1, in the case of confirming the response from the communication channel 11, sends the selec tion signal to the communication channel 11. The exchange 1 is connected to the terminal 52 via a communication channel 12 by receiving the selection signal from the communication channel 12 of the speed conversion trunk 2, thereby, communication between the terminals 51 and 52 can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a line speed conversion control system for a time-division line switch in a store-and-forward system.

(Prior art) Conventionally, in a time-division circuit switch where software is not involved in determining the communication status for each character of a communication message,
Connections between terminals with different speeds were subject to regulation.

(Problems to be Solved by the Invention) When connecting terminals with different speeds in the above-mentioned time-division circuit switching equipment, which is subject to the conventional regulations, during communication, software is required for each character of the communication message. Must be involved. In addition, when sending a message from a terminal with a high speed to a terminal with a low speed, it is necessary to use storage control.
/Free) is required. Furthermore, since a plurality of buffer areas must be secured, an enormous storage capacity is required. All of these greatly affect the processing capacity of the exchange, and in particular, the involvement of software for each character of a communication message has the disadvantage of significantly increasing the burden on the central processing unit that controls the exchange. be.

An object of the present invention is to connect a speed conversion trunk to an exchange according to a call connection control method when connecting terminals having different speeds, and to perform storage control processing of communication messages during communication in progress using this trunk. By eliminating the above drawbacks,
To provide a line speed conversion method for a time division line exchange configured to reduce the burden on a central processing unit.

(Means for Solving the Problems) A line speed conversion control method for a time division line switch according to the present invention includes a plurality of terminals, a switch connected to the plurality of terminals,
It consists of a speed conversion trunk connected to an exchange, and the speed conversion trunk includes a line control device, a storage device, and a central processing unit.

The line control device is for controlling the line by calling/responsing between the line and the exchange.

The storage device is for storing line control details.

The central processing unit is a device for controlling the line according to the contents of the storage device.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a line speed conversion control method for a time division line exchange according to the present invention.

Referring to Figure 1, 1 is an exchange, 2 is a speed conversion trunk,
11 and 12 are communication lines, 13 is a control line, and 22
are storage devices, 51.52 are terminals, and 81.82 are low-speed lines and high-speed lines, respectively.

The speed conversion trunk 2 is connected to the communication line IT, 12, and the control line 13 through built-in line interfaces.

FIG. 2 is an explanatory diagram showing a series of signal sequences in which the present invention is applied to communication between terminals of different speeds.

FIG. 8 is a fuzu chart showing -n of software processing in the present invention.

Exchange 1 connects terminal 5 with a different speed from terminal s1! A call is placed on the control line 13 to the speed conversion trunk 2 by receiving a selection signal to the speed conversion trunk 2.

After confirming the response from speed conversion trunk 2, terminal st
, st notifies the speed conversion trunk 2 of line speed information via the control line 13. The speed conversion trunk 2 receives the above signal (K) and saves the initialization completion signal after conversion.

As a result, the exchange 1 makes a call to the communication line 11 in order to connect the terminal 51 and the communication line 11 of the speed conversion trunk 2. At the same time, communication line 1! Since a call is detected, the exchange 1 returns a call response to the communication line 1'lK, and then enters a state of waiting for reception of a selection signal. The exchange 1 sends a selection signal to the communication line 11 by confirming the response from the communication line l111. This selection signal is transmitted via the communication line 11 to the exchange 1! c.Also reported.

Upon receiving the selection signal from the communication line 12 of the speed conversion trunk 2, the exchange 1 transmits the terminal 5! depending on the content of the terminal 62, the terminal 51 and the terminal 52
It becomes possible to communicate with

FIG. 4 is a block diagram showing the detailed configuration of a line speed conversion control system for a time division line exchange according to the present invention. In FIG. 4, the same elements as in FIG. 1 are numbered the same. Also,! 1 is the central processing unit! Black is the line control device, 3
1. ! The hit is the signal line that makes up the communication line 11, 3! , iS
4 is a signal line forming the communication line 12, and s5 to 37 are signal lines forming the control line 1s.

The central processing unit 21 reads the contents of the storage device 22 from the line control device 2! and the storage device 22.

When a call arrives through the input signal line 35 of the control circuit [11],
The central processing unit 21 learns of the call origination from the line control unit 2s through the common control signal line iT. The central processing unit 21 is a line control device via the common control signal line 57! An instruction is issued to the IK to return a call response.

The call response is sent back to the switch via the output signal line J8 of the control circuit [1j.

Next, the 1 central processing unit 21 transmits the line speed information from the input signal line ss to the line control device! ! In response to these signals, the common control signal line 1'
Line control device through s! Instruct the hardware of the black communication lines 11 and 12 to set the line speed. When the line speed information setting is completed, the common control signal line 37 is returned, and the central processing unit 21 instructs the line control unit 23 to return an initial setting completion signal. The initialization completion signal is sent back to the exchange 1 via the output signal line S6. Upon receiving the initialization completion signal, the exchange 1 connects the terminal 61 to the communication line 11 of the speed conversion trunk 2.
A call request is sent to the input signal line 61 of.

Central processing unit! 1 receives a call from the input signal line 31 from the line control device 23 through the common control signal line 37, instructs the line control device 2S to respond to the call to the output signal line S2 of the communication line 11, and further communicates. Output signal of time a12! /s34 is instructed to request a call. Upon reception of the call response from the output signal line s2 of the communication line 11, the exchange 1 sends a selection signal to the input signal line 31, while responding to the call from the output signal @34 of the communication line 12. returns the call response. The central processing unit 21 is connected to the communication line 11
The line control device 2δ returns the common control signal line 37 to notify the reception of the selection signal from the input signal line s1, and transmits the output signal of the communication line 12 to the line control device 21 via the common control signal line 5T. Instructs transmission of a reception selection signal to line 34. Upon receiving the selection signal from the output signal line 34 of the communication line 12, the exchange 1 connects the communication line 12 and the terminal 52.

Messages sent from the terminal 51 during communication are reported to the central processing unit 21 via the input signal line S1 of the communication line 11 and the common control signal line 3T by the line control unit 23. ! 1 is common control signal line 5
Line control device via T! 3 to send a message to the output signal line s4 of the communication line 12. Similarly, a message sent from one terminal 52 is sent from the communication line 120 input signal line a5 to the line control device! The received message is reported to the central processing unit 21 via the common control signal line ST, and the central processing unit 21 stores the received message in the storage device 22 via the common control signal line ST.

Central processing unit! 1 is a storage device! The received message stored in the communication line 11 is read out and sent to the line control device 25 via the common control signal line 3T. Instructs to send received messages to.

(Effects of the Invention) As explained above, the present invention provides a speed converting trunk and separates the storage control in sending and receiving communication messages between different speed terminals from the processing of the switching equipment, thereby minimizing the burden on the switching equipment. In addition, there is an effect that communication can be performed between different speed terminals without changing the call connection method in a time-division line exchange, that is, a method that does not involve software during communication.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a line speed conversion control method for a time division line exchange according to the present invention. FIG. 82 is an explanatory diagram showing a series of signal sequences in which the present invention is applied to communication between terminals at different speeds. FIG. 8 is a flowchart illustrating one sequence of software processing according to the present invention. FIG. 4 is a block diagram showing the detailed configuration of a line speed conversion control system for a time division line exchange according to the present invention. 1...Exchange machine! ...Speed conversion trunk! 1...Central processing unit 22...Storage device 2δ.00 Line control device 51.62--One terminal 11-1M, 61, [2...Command line 31-3T...
·Signal line

Claims (1)

[Claims] a plurality of terminals; an exchange connected to the plurality of terminals;
A line speed conversion control method for a time-division line exchange comprising a speed conversion trunk connected to the exchange, wherein the speed conversion trunk is a line control system for controlling the line by calling/responsing between the speed conversion trunk and the exchange. A time division line comprising: a device; a storage device for storing control contents of the line; and a central processing unit for controlling the line according to the contents of the storage device. Switch line speed conversion control method.