JPH0759003B2 - ISDN pseudo call device - Google Patents

Description

The present invention relates to an ISDN pseudo call device, and more particularly to self-diagnosis thereof.

[Conventional technology]

The ISDN pseudo call device is a device that connects to an ISDN subscriber device and tests the processing capability of the switching system as a pseudo terminal. First, the overall configuration of a conventional ISDN pseudo call device and its diagnosis method will be described.

FIG. 3 is an overall configuration diagram showing a connection of a conventional ISDN pseudo call device 1a ISDN subscriber device 2. The ISDN pseudo call device 1a includes a pseudo call device common unit 10 and a plurality of pseudo terminal adapters 20a to 2na, and the pseudo terminal adapters 20a to 2na and the pseudo call device common unit.
The 10 are connected by a pseudo call common bus 50. Then ISDN
The subscriber unit 2 is composed of subscriber circuits 30 to 3n for a plurality of calls and a common section (not shown), and is connected to the above pseudo terminal adapters 20a to 2na and subscriber lines 6A to 6N. . Then, in response to a command from the pseudo call device common unit 10, the pseudo terminal adapters 20a to 2na perform a series of incoming and outgoing call processing and data processing for the ISDN subscriber device 2.

FIG. 4 shows the pseudo terminal adapter 20a and the subscriber circuit 30 of FIG.
FIG. Both are CPU 201 of pseudo terminal adapter 20a
And D channel handler 208 and CPU of subscriber circuit 30
(Not shown) and D channel handler 308
It makes incoming and outgoing call processing to and from the line. That is, the data from the pseudo call pattern generation circuit 202 passes through the transmission frame creation circuit 205, is sent from the transmission section of the subscriber line data transmission / reception circuit 207 to the subscriber line 6A, and the subscriber line data transmission / reception circuit 307 of the subscriber circuit 30. Is received by the receiving section of. Then, the above-mentioned data from the pseudo call pattern generation circuit 202 is detected by the reception data detection circuit 306, passes through the data rate conversion circuit 315, is sent as Dout to the upper device, and is returned. The returned data Din includes the data rate conversion circuit 315, the transmission frame creation circuit 305, the subscriber line data transmission / reception circuits 307 and 207, and the reception data detection circuit 20.
6. The pseudo call pattern check circuit 203 sequentially checks through the selection switch 209. Incidentally, in the conventional self-diagnosis of the ISDN pseudo call device, the selection switch 209 is switched to the self-diagnosis mode in accordance with an instruction from the pseudo call device common unit 10, and the data from the pseudo call pattern generation circuit 202 is selected by the switch 209.
And call back the data with a pseudo call pattern check circuit
I was checking at 203.

[Problems to be solved by the invention]

Since the conventional ISDN pseudo call device described above has a shallow data return point, it is not possible to confirm the normality of the main functions of the pseudo terminal adapter transmission frame creation circuit, subscriber line data transmission / reception circuit, reception data detection circuit, D channel handler, etc. .
That is, there is a drawback that sufficient self-diagnosis cannot be performed. Therefore, a problem to be solved by the present invention, in other words, an object of the present invention is to provide an ISDN pseudo call device capable of performing a detailed self-diagnosis by newly providing a return route of diagnostic data. .

[Means for Solving Problems] The ISDN pseudo call device of the present invention selects whether to connect to an ISDN subscriber device of an ISDN network to interface a pseudo call or to connect to a self-diagnosis adapter for self-diagnosis. In an ISDN pseudo call device including a plurality of pseudo terminal adapters having a function, a self-diagnosis adapter that diagnoses the device itself, and a pseudo call device common unit that controls the pseudo terminal adapter and the self-diagnosis adapter, The self-diagnosis adapter includes a central processing unit that generates a higher-level function on the network, a D channel handler that controls an ISDN call signal, a master clock generation circuit that generates an ISDN line clock and operates a transmission line, and the D Transmission for assembling D channel data from the channel handler and B channel data from the loopback circuit A frame creating circuit, a subscriber line data transmitting / receiving circuit for transmitting data from the frame creating circuit to an opposing pseudo terminal adapter via a self-diagnosis line, and the subscriber line data transmitting / receiving circuit via the self-diagnosis line A received data detection circuit that decomposes the data received from the pseudo terminal adapter into D channel data and B channel data, sends the D channel data to the D channel handler, and sends the B channel data to the loopback circuit. A reception clock extraction circuit for extracting a clock of a reception system circuit including the reception data detection circuit from the data received via the self-diagnosis line, and a loopback circuit for forming a path for transmitting the B channel data. It is equipped and configured.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. In the figure, an ISDN pseudo call device 1 is connected to an ISDN subscriber device 2 by subscriber lines 6A to 6N. The ISDN pseudo call device 1 comprises a pseudo call device common section 10 and a plurality of pseudo terminal adapters 20.
~ 2n, which are connected via a pseudo call common bus 50. The self-diagnosis adapter 100 has a signal processing function and a data loopback function, and is connected to the pseudo call common unit 10 via the pseudo call common bus 50. The self-diagnosis line 70 from the other terminal of the self-diagnosis adapter 100 is connected to one of the pseudo terminal adapters 20 to 2n according to the instruction from the pseudo call device common unit 10.

FIG. 2 shows the pseudo terminal adapter 20 and the self-diagnosis adapter 10.
It is a block diagram of 0. When performing self-determination, the pseudo call device common unit 10 selects one of the pseudo terminal adapters 20 to 2n and sets the selection switch 210 to the self-diagnosis line 70. When the self-diagnosis adapter 100 and the pseudo terminal adapter 20 are connected, first the self-diagnosis adapter 100 and the pseudo terminal adapter 20
Establishes the synchronization of the operating clock between and. That is, the clock of the master clock generation circuit 110 of the self-diagnosis adapter 100 becomes the basic clock, and the loopback circuit 111, the transmission frame creation circuit 105, and the transmission system circuit of the subscriber line data transmission / reception circuit 107 are operated to make the self-diagnosis line 70. Send data. On the other hand, in the pseudo terminal adapter 20, the self-diagnosis line
The data from 70 is received by the subscriber line data transmission / reception circuit 207 via the selection switch 210, and the reception clock extraction circuit 204 extracts the clock from the data and synchronizes it to create the clock of the transmission / reception system circuit. Further, in the reception system of the self-diagnosis adapter 100, the data transmitted from the pseudo terminal adapter 20 via the self-diagnosis line 70 is received by the subscriber line data transmission / reception circuit 107, and the reception clock extraction circuit 104 clocks the data. Is extracted and synchronized, and the clock of the receiving system circuit is created. When the clock system synchronization cannot be established in the above operation, the pseudo call device common unit 10 is notified as an error.

Next, the flow of diagnostic data (self-diagnosis method) will be described.

In the first method, the diagnostic data is the pseudo call pattern generation circuit.
It is generated in 202, returned by the selection switch 209, and checked by the pseudo call pattern check circuit 203.

In the second method, the diagnostic data is the pseudo call pattern generation circuit.
The data from the 202 (B channel data) and the data from the D channel handler (D channel data) are passed through the transmission frame creation circuit 205 that assembles the transmission frame, and from the subscriber line data transmission / reception circuit 207 via the selection switch 210 to It is sent to the opposing self-diagnosis adapter 100 via the diagnostic line 70. In the self-diagnosis adapter 100, the above-mentioned diagnostic data is received by the subscriber line data transmission / reception circuit 107, separated by the received data detection circuit 106 into D channel data and B channel data, and the former D channel handler 108 is provided.
The latter is sent to the folding circuit 111. The folding circuit 111 changes the B channel data from the reception clock to the transmission clock and sends it. Next, the B channel data from the loopback circuit 111 and the D channel handler 1
D channel data from 08 is transmitted frame creation circuit 105
Is transmitted from the subscriber line data transmission / reception circuit 107 to the pseudo terminal adapter 20 via the self-diagnosis line 70. Further, in the pseudo terminal adapter 20, the subscriber line data transmission / reception circuit 207 receives the data from the self-diagnosis line 70 via the selection switch 210, and the reception data detection circuit 206 receives the D channel data and the B channel data. And sends the former to the D channel handler 208 and the latter to the pseudo call pattern check circuit 203 via the selection switch 209. The pseudo call pattern check circuit 203 then notifies the pseudo call device common unit 10 of the check result.

The self-diagnosis of the CPU 201 of the pseudo terminal adapter 20 and the D channel handler 208 is performed by the CPU 1 of the self-diagnosis adapter 100.
Normality is confirmed by sending and receiving a protocol signal between 01 and the D channel handler 108. Therefore IS
The diagnostic range of the DN pseudo call device 1 is the pseudo call device common unit 10 and CPU2.
01, D channel handler 208, transmission frame creation circuit 20
5, the reception data detection circuit 206, the subscriber line data transmission / reception circuit 207, and the selection switch 210, and the self-diagnosis of the pseudo call pattern generation circuit 202 and the pseudo call pattern check circuit 203 is performed by data return.

When the above two methods are put together, the first method is the return by the selection switch 209, and the diagnostic range is the pseudo call pattern generation circuit 202 and the pseudo call pattern check circuit 203. The second method is self-diagnostic adapter 100 folding circuit 111
The diagnostic range at this time is the pseudo call pattern generation circuit 202, the pseudo call pattern check circuit 203, the transmission frame creation circuit 205, the reception data detection circuit 206, the subscriber line data transmission / reception circuit 207, the CPU 201, and the D channel. Handler 2
08 and the common part interface 230.

〔The invention's effect〕

As described above, according to the present invention, the adapter for self-diagnosis includes the common part interface circuit, the central processing unit, the D channel handler, the master clock generation circuit, the transmission frame generation circuit, the reception data detection circuit, the reception clock extraction circuit, the data folding circuit. It is equipped with a subscriber line data transmission / reception circuit, and by connecting the pseudo terminal adapter and the self-diagnosis adapter in response to a command from the common part of the pseudo call device, the diagnostic range of various functions in the pseudo terminal adapter can be greatly expanded. The effect is that you can do it.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is a detailed block diagram of a self-diagnosis adapter and a pseudo terminal adapter, FIG. 3 is an overall configuration diagram of a conventional example, and FIG. 4 is FIG. 3 is a detailed block diagram showing a part of FIG. 1 ... ISDN pseudo call device, 2 ... ISDN subscriber device, 10 ...
Pseudo caller common part, 20-2n ... Pseudo terminal adapter, 30-
3n ... Subscriber circuit, 50 ... Pseudo-call common bus, 6A-6N ...
Subscriber line, 70 …… Self-diagnosis line, 100 …… Self-diagnosis adapter, 101,201 …… CPU (Central Processing Unit), 202 …… Pseudo call pattern generation circuit, 203 ……
Pseudo call pattern check circuit, 104,204 …… Receive clock extraction circuit, 105,205 …… Transmission frame creation circuit, 106,2
06 …… Reception data detection circuit, 107,207 …… Subscriber line data transmission / reception circuit, 108,208 …… D channel handler, 20
9,210 …… Selection switch, 110 …… Master clock generation circuit, 111 …… Folding circuit.

Claims (1)

[Claims] 1. A plurality of pseudo terminal adapters having a function of selecting whether to connect to an ISDN subscriber unit of an ISDN network to interface a pseudo call or to connect to a self-diagnosis adapter for self-diagnosis, and the device itself. A self-diagnosis adapter for diagnosing the above, and a pseudo call device common unit for controlling the pseudo terminal adapter and the self-diagnosis adapter.
In the ISDN pseudo call device, the self-diagnosis adapter includes a central processing unit that generates a higher-level function on the network, a D channel handler that controls an ISDN call signal, and a master that generates an ISDN line clock and operates a transmission line. A clock generation circuit, a transmission frame creation circuit for assembling the D channel data from the D channel handler and the B channel data from the loopback circuit, and a pseudo terminal that opposes the data from the frame creation circuit via a self-diagnosis line. The subscriber line data transmitting / receiving circuit for transmitting to the adapter, and the data from the pseudo terminal adapter received by the subscriber line data transmitting / receiving circuit via the self-diagnosis line are decomposed into D channel data and B channel data. Send channel data to the D channel handler A reception data detection circuit for transmitting channel data to the folding circuit; a reception clock extraction circuit for extracting a clock of a reception system circuit including the reception data detection circuit from the data received via the self-diagnosis line; An ISDN pseudo call device, comprising: a loopback circuit that forms a path for transmitting channel data.