JPS61131942A - Protocol converter - Google Patents

Abstract

PURPOSE:To eliminate increases in hardware and complicated operation by inputting data of a specific protocol to plural ports and converting the specific protocol into the standard protocol so as to set a value of the parameter item at this conversion. CONSTITUTION:Data of the specific protocol from the terminal input/output devices DTE7-10 is inputted to plural input ports 11-14 of a protocol converter. The value of a parameter item is et to a setting section 15 consisting of the firmware or hardware of the converter and a control section 17 converts the specific protocol into the standard protocol and controls the firmware and hardware. Then the data of the standard protocol obtained by setting the parameter items is outputted to a high-order system from an X-25 trunk section 16 through a line L to eliminate the increase in hardware and complicated operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a protocol converter used when configuring a packet switching system, which is one of the usage forms of DDX (Digital Data Exchange Network).

[Technical background of the invention and its problems] In general, packet assembly and disassembly functions (hereinafter referred to as PAD
I! ! D by a terminal (NPT) that does not have
When joining the DX packet switching system, P of the packet multiplexing equipment (PMX) installed in each district is required.
It is necessary to use the AD function, but in this case P
Since the network is used when setting the value of the parameter item of the MX's PAD III function, extra communication charges are required.

Therefore, especially for companies that have a large number of terminal input/output devices (hereinafter referred to as DTE), it is more economical to have the PAD function on the terminal side.

Under these circumstances, a packet type terminal (hereinafter referred to as PT) having a PAD function was developed.

By the way, if you join the DDX packet switching system using this PT, C
Since data must be transmitted using Barkerato as specified in CITT (International Telegraph and Telephone Consultative Committee) Recommendation X.25, a conversion device called a protocol converter is provided in the PT.

The protocol converter stores in advance parameter items for converting the unique protocol of the data output by each DTE to the X.25 protocol, and by setting the value of this parameter item, the protocol of the data output by the PT can be changed. It becomes the X.25 protocol.

There are several types of specific methods for setting this parameter.

For example, as shown in FIG.
A method of providing a dedicated parameter setting switch 2 inside,
As shown in FIG. 4, a parameter setting section 3 is provided in the protocol converter 1, and an independent operating bag N4 is connected to this to input setting values, or a port selection switch 5 is used to set DTE only when setting parameters. port 6
There are methods such as changing the parameters and inputting the set values from the DTE side to the parameter setting section 3, but all of these methods have the drawbacks of increasing the amount of hardware of the device and complicating the operation.

[Object of the invention] The present invention has been made under these circumstances, and in particular, D.
The object of the present invention is to provide a protocol converter that eliminates the increase in hardware amount and the complexity of operation in a type of inputting parameter item values from a TE to a protocol converter.

[Summary of the Invention] In other words, the protocol converter of the present invention includes a plurality of ports into which data of a unique protocol to be converted into data of a standard protocol is input, and an interface for converting the unique protocol into the standard protocol. II. means for tilling, means for setting the value of one parameter item for this conversion, means for outputting the data converted to data of the standard protocol to the line, and the setting means is connected to one port and None, characterized by comprising means for connecting any one of the ports to the setting means to enable input of the value of the parameter item from any one of the ports. There is.

[Embodiment 1 of the invention DESCRIPTION OF THE PREFERRED EMBODIMENTS Details of embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In the figure, 7 to 10 are Ps that communicate through the line.
DTE as input/output device of T, 11 to 14 are DTE7
10 is a DTE port numbered (A) to (D) into which the data of the unique protocol output by 10 is input, 15 is a setting section composed of firmware or hardware that sets the value of a parameter item, and 16 is a parameter A trunk section serves as an output means for transmitting standard protocol data obtained by setting item values to a host system via a line, and 17 indicates a control section that controls data protocol conversion and the operation of each firmware and hardware. ing.

Note that the parameter items mentioned above are items that indicate, for example, packet sending timing, communication speed, etc. in the X.25 protocol, and can be specified by setting a value (actually, selecting one of the selection numbers). conditions are determined. Its value is set by a so-called PAD command.

FIG. 2 is a diagram showing the connection state when setting parameters.

First, when a parameter setting request occurs, the control unit 17 performs a virtual call (partner selection) I reading method between the port (A) 11 for the DTE 7 and the setting unit 15, for example.
(hereinafter referred to as VC).

When this call connection is established, the control unit 17
The T tE 7 is instructed to input a PAD command, and the PAD command is input from the DTE 7 to the setting unit 15 via the port (A) 11 . This determines the parameters of the X.25 protocol.

Next, the port (A) 11 inputs the character frame output from the DTE 7 and outputs it to the control unit 17, and as soon as the data is transmitted in the control unit 17, the dial number of the other party's protocol converter and the D number of the port are If specified, a call connection is established between the trunk section 16 and the trunk section of the other protocol converter, and the DTE
7. Data transmission to the other party becomes possible.

Thereafter, data input through the DTE 7 ports (A>11) is converted into the X.25 protocol and output from the trunk section 16 to the line.

As mentioned above, in the protocol converter of this example,
At the stage of setting the value of the parameter item, set the setting section 15 to 1.
It is considered as one port.

Then, let this virtual port be port (E) and port (
A) Since a VC call connection is established between 11 and port (E), port (E) can respond to port (A>11), and the DTE 7 can give a PAD command to the setting unit 15. It can be done.

In the protocol converter of this embodiment, there is no need to provide a dedicated operating device or a dedicated changeover switch for parameter setting, and the operation itself is extremely simplified.

Note that since the port for parameter setting is arbitrary, values of parameter items can be input from any of the DTEs 7 to 10 using the same procedure.

[Effect of the invention 1 As explained above, the protocol converter of the present invention has
a plurality of ports into which data of a unique protocol to be converted into data of a standard protocol is input; means for controlling conversion of the unique protocol to the standard protocol; means for setting values of parameter items in this conversion; A means for outputting data converted into protocol data to a line and a setting means are regarded as one port, and any one of the ports is connected to the setting means, and a call is made from any one of the ports. Since it has a means for inputting the values of parameter items, it is possible to reduce the hardware complexity and the complexity of the operation procedure.
You can set one shift of parameter items from .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the operation of its main parts, and FIGS. 3 to 5 are schematic diagrams showing the configuration of a conventional protocol converter. It is a diagram. 7-10... DTE 11-14... Port 15... Setting section 16... Trunk section 17...
・・・・・・・・・Patent attorney representing the Control Department Satoshi Suyama - Figure 1 Figure 2

Claims (1)

[Claims] (1) Setting a plurality of ports into which unique protocol data to be converted into standard protocol data is input, means for controlling conversion of the unique protocol to the standard protocol, and values of parameter items in this conversion. means for outputting the data converted into standard protocol data to a line; and the setting means are regarded as one port, and any one of the ports is connected to the setting means, 1. A protocol converter comprising: means for allowing input of the value of the parameter item from any one of the ports.