JPH09219704A - Method for recognizing mormality in isdn line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To identify whether an incoming call is the one in correspondence with an originating call for recognizing normality or the one from totally different line even in the case of receiving the incoming call while the normality of an ISDN line is being recognized without using a communication port. SOLUTION: The line number of the ISDN line is registered in a memory (S1) and, then, an operation start for recognizing the normality of the ISDN line is indicated (S2). Then, the start of a communication port control program is stopped (S3) and call-originating is executed as against the memory-registered line number (S4). After that, the coincidence of a call originator number with the memory register number is executed (S5) and it is judged whether it is coincident or not (S6). When it is coincident, a disconnecting message (normal pattern) is transmitted (S7). The disconnecting message (abnormal pattern) is transmitted at the time of non-coincidence (S8).

Description

Detailed Description of the Invention

[0001]

The present invention relates to an ISDN (Int)
integrated Services Digital
Network: A method for confirming normality of a service integrated digital network, and a method for confirming normality for a D channel (call control signal channel) and a B channel (information channel).

[0002]

2. Description of the Related Art Conventionally, as a method for confirming normality on the D channel of an ISDN line in an ISDN device, (1) a lamp display of power supply information indicating a synchronization state of layer 1, (2)
There was a method of checking the functions from layer 1 to layer 2 by the self-test function, and (3) a method of checking the communication operation by making a call to another line or receiving a call from another line.

[0003]

However, in the methods (1) and (2) described above, confirmation regarding layer 3 (whether or not there is caller number display information based on the contract, packet communication admissibility), etc. is verified. There is a problem that you cannot do it.

Further, the above method (3) has a problem that an ISDN device having the same function and serving as a communication partner is required.

As a means for solving the above-mentioned two problems, it is conceivable to confirm the normality of the ISDN line by making a call from the ISDN device connected to the ISDN line to the device itself and performing communication. .

Therefore, as shown in FIG. 2, the ISDN line has a call control channel (D channel) 1 and a communication channel (B channel) 2 for the basic interface.
Since it has a book structure, by using two B channels, it is possible to make a call once, return the call, and then receive the call again to be in communication.

However, there is a problem that it cannot be confirmed when the communication port (communication path connecting the DTE and the network) of the ISDN device fails. Also, if an incoming call comes in while the ISDN line is being checked for normality, it cannot be identified whether it is an incoming call that corresponds to an outgoing call for checking normality, or an incoming call from another line at all. There is a problem.

Therefore, even if an incoming call is received while the normality of the ISDN line is being checked without using the communication port, the incoming call may be one corresponding to the outgoing call for the normality check, or a completely different call. There is a demand for realization of a method for confirming the normality of an ISDN line that can identify whether it is an incoming call from the line.

[0009]

Therefore, the invention according to claim 1 provides an ISDN between at least two ISDN devices.
An ISDN line normality confirmation method for confirming the normality of an ISDN line of a communication system in which a line is interposed solves the above-mentioned problems with the following characteristic configuration.

That is, according to the first aspect of the present invention, any one of the ISDN devices (1) registers the line number of the ISDN line of the normality confirmation target in the memory in order to confirm the normality of the D channel. At the same time, in order to use this line number as the sender number, "line number registration process" for registering the above memory and (2) stopping the communication port control process,
"Virtual port control start processing" that starts the virtual port control processing, and (3) "Normality confirmation start processing" that performs a normality confirmation transmission operation for the line number registered in the memory, and (4) It comprises "incoming call originator number confirmation processing" for confirming whether or not the originator number of the received incoming call is the same as the line number registered in the memory.

By adopting such a configuration, the call control process can be performed without being affected by the communication port for confirming the normality of the D channel and without providing a special device to the ISDN device opposite to the ISDN device. Yes, if an incoming call comes in while the ISDN line's normality is being checked, it can be identified whether it is an incoming call corresponding to the outgoing call for normality check or an incoming call from another line. It becomes.

[0012] The invention described in claim 4 is the first invention.
In addition to the configuration described in any one of 3), "data pattern sending process" for sending a predetermined data pattern signal to the B channel of the ISDN line registered in the memory in order to confirm the normality of the B channel. And a "confirmation process" for confirming whether or not the received data pattern signal is the same as the predetermined data pattern signal.

By adopting such a configuration, by transmitting the data pattern signal also to the B channel, the IS
It is possible to confirm the normality of the B channel of the DN line.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings. Therefore, in the present embodiment, in the ISDN device, the virtual data communication terminal adapter (TA) is provided with a virtual port (2 ports) composed of only software, and communication is performed by the virtual port for verification. By doing so, the normality of the ISDN line is confirmed.

FIG. 3 shows a basic interface (2B + D).
Connected to ISDN line 2 and installed communication port 5
ISDN device 10 in which the data terminal device DTE1 is connected to
3 is a functional configuration diagram of FIG.

In FIG. 3, the ISDN device 10 is
Man-machine interface control circuit 3, virtual port circuit 4, communication port circuit 5, and communication port control circuit 6
And a layer 1 control circuit 7, a layer 2 control circuit 8 and a layer 3 control circuit 9.

I connected via the ISDN line 2
The protocol between the SDN device 10 and the ISDN network 11 is highly flexible, and is layered into layers 1 to 3 based on the OSI (Open System Interconnection) reference model to facilitate realization. However, the layer 1 control circuit 7, the layer 2 control circuit 8, and the layer 3 control circuit 9 are
It corresponds to each of these layers.

The layer 1 control circuit 7 is for defining electrical and physical conditions, and corresponds to time division multiplex transmission, access contention control and the like. It should be noted that these processes are realized by a hardware circuit.

The layer 2 control circuit 8 is for link setting for message transfer and error control, and is for setting a plurality of logical links, broadcasting communication to all terminals, automatic address assignment, This corresponds to the setting of the service identifier of.

The layer 3 control circuit 9 sets up and releases the call,
For call control, including control of supplementary services,
This includes service identification information, transfer of terminal attribute information, channel selection procedure, multipoint call reception procedure, and the like. still,
The layer 2 control circuit 8 and the layer 3 control circuit 9 are realized by software.

The man-machine interface control circuit 3 is used for inputting and outputting various parameters used for communication of the ISDN device 10, communication state, etc. using the ten-key pad 12, the LCD display 13 and the like. It is a thing. A communication port 5 is provided at a connection portion with the data terminal device DTE1, and a communication port control circuit 6 performs call control processing of the communication port 5.

A virtual port (two-port) circuit 4 has a function equivalent to that of the communication port 5 in terms of call control, and is constructed by only software. The program configuration of the control processing of the virtual port circuit 4 is shown in FIG.

Incidentally, this virtual port (in order to describe two virtual ports, they are referred to as virtual ports 1 and 2 respectively)
Has the same function as the communication port in terms of call control, but when the normality of the ISDN line is confirmed by this method, the call is made from this virtual port by the program processing (the virtual port 1 is used) to receive the call. This is for performing only the operation (using the virtual port 2). Therefore, a normal outgoing call operation and a normal incoming call operation cannot be performed.

FIG. 4 is a program configuration diagram of control processing of the virtual port circuit 4. In FIG. 4, the program for the control process of the virtual port circuit 4 is composed of an idle process (step S41), a call process (step S42), and a call acceptance process (step S43). In the vacant process (step S41, state 0), after the start of the test (step S41a), the call setting is transmitted (step S41b), and the state is changed to step 1 (step S41c). In the call setting transmission (step S41b),
Unique data is set in the subaddress, and the called number is the number of the ISDN line connected.

In the calling process (step S42, state 1), after receiving the call setting acceptance (step S42a), the channel identifier (step S42b) is confirmed, and in the case of the B channel, the channel information is stored ( Step S
42c), and then transit to state 2 (step S42)
d).

Call acceptance processing in state 2 (step S43)
Then, when the call setting (step S43a) is received, the receiving process is performed, then the channel identifier is identified (step S43b), and in the case of the B channel, the presence or absence of the calling number display is confirmed (step S43c). If there is a display, it is confirmed whether it matches the called number (step S43).
d) If they match, the destination sub-address check is confirmed (step S43e), and if they match, a call (step S43f) is sent and a response (step S43) is sent.
g) is sent to monitor the disconnection timing (step S43).
h) is started. The call acceptance process (step S43) in the state 2 also includes a reception process (step S43i) when a call is received.

(Operation of confirming normality of ISDN line):
Next, the operation of the method for confirming the normality of the ISDN line by the ISDN device 10 of FIG. 3 will be described. First, the line number of the ISDN line to be confirmed is registered in the memory (step S1). The confirmation of normality by this method is to make a call from the self and to receive it at the dead end. By registering the line number of the ISDN line to be confirmed in the RAM memory circuit on the communication terminal,
It becomes the called party number when making a call. When confirming the normality without registering the line number in the memory, the ISDN network side is disconnected at the stage of transmission.

Next, the operation for confirming the normality of the ISDN line is instructed to start (step S2). Select "Confirm normality of ISDN line" from the operation selection screen set in the program processing.

Next, the activation of the communication port control program relating to the communication port is stopped (step S3). "IS
When "Confirm normality of DN line" is selected, the normal start of the communication port control program is stopped and the start of the virtual port control program is started.

Then, the call is sent to the line number registered in the memory (step S4). Since the line number registered in the memory next is the same as the line number of the ISDN line currently connected, an incoming call comes into the same line after making a call. Next, it is compared whether or not the caller number of the incoming call is the same as the line number registered in the memory (step S5).

At this time, for the purpose of excluding calls originated for purposes other than the purpose during execution of the normality confirmation, the caller number is the same as the line number registered in the memory for the incoming call. Or not (step S
6). If the result of this comparison is the same, an operation of disconnecting after 10 seconds is taken as during communication, that is, a disconnection message (normal pattern) is transmitted (step S7).
If they are not the same, the incoming call is discarded, that is, a disconnection message (abnormal pattern) is sent (step S
8). Also, if no incoming call arrives within 10 seconds after making a call, the disconnecting operation is performed.

FIG. 5 is a time sequence diagram showing the above operation. In FIG. 5, first, an outgoing message is sent from the ISDN device to the ISDN network (step T1). Next, when an incoming message from the ISDN network is received (step T2), the identity with the outgoing message is compared (step T3). Then, the response message is sent to the ISDN network (step T4). ISD
The N device and the opposite ISDN device are communicating (step T
In 5), if it is judged that they are the same (that is, a normal pattern) in the comparison of the same (step T3), a disconnect message (step T6) is sent to the ISDN network after 10 seconds.

In addition, an outgoing message is sent from the ISDN device (step T7), then an incoming message is received (step T8), the identities are compared, and it is confirmed that they do not match (that is, an abnormal pattern). Then, the disconnection message is sent to the ISDN network after a predetermined time (step T9).

(Effects of the Embodiment of the Present Invention) According to the above-described embodiments of the present invention, when confirming the normality of the ISDN line, it is possible to confirm the layer 3. Also,
There is no need for a communication partner ISDN device having the same function. Further, it can be confirmed even when the communication port of the ISDN device fails. Furthermore, when an incoming call is received during the confirmation of the normality of the ISDN line, the incoming call corresponding to the outgoing call for confirming the normality or the incoming call from another line can be identified.

Moreover, since it can be realized by program processing which does not depend on the hardware configuration, it can be applied to various ISDN devices.

(Other Embodiments): (1) In the above embodiments, the normality confirmation of the ISDN line is performed mainly for the control channel (D channel) of the ISDN basic interface. However, the confirmation for the communication channel (B channel) can also be realized. FIG. 6 is a connection configuration diagram for that purpose.

In FIG. 6, a circuit for generating a predetermined data pattern and a circuit for confirming whether or not the returned data pattern is the same as the one originally transmitted are set by hardware. Add on the configuration. Then, by utilizing the fact that the communication is in progress at the time of confirming the normality, the data pattern is communicated to the communication path on the B channel to confirm the normality of the B channel communication path.

(Operation): Basically, the above-mentioned ISDN
This is the same as the line normality confirmation, but at the point of instructing the start of the "ISDN line normality confirmation" operation in the above-mentioned operation (step S2), the operation is further performed for only the D channel or the B channel. Is also selected as a target. After that, when communication is in progress and the B channel communication path is established, it is the same as the circuit that generates a certain defined data pattern and the one that was originally sent for the returned data pattern. The operation of activating the circuit for confirming the above is added when the normality confirmation for the B channel is also selected.

In this way, the normality can be confirmed for all channels (D channel, B channel) in the ISDN basic interface.

(2) In addition to the terminal adapter (TA), the above-mentioned ISDN device may be, for example, a DSU (Dig).
ital service unit), ISDN exchange, private branch exchange PBX and ISD accommodating ISDN line
It can also be applied to N telephones and modem devices accommodating ISDN lines.

[0041]

As described above, the invention of claim 1 is an IS for confirming the normality of an ISDN line of a communication system in which an ISDN line is interposed between at least two ISDN devices.
In the normality confirmation method of the DN line, one of the above I
In order to confirm the normality of the D channel, the SDN device registers the line number of the ISDN line to be normality checked in the memory, and also performs the memory registration in order to use this line number as the caller number. Line number registration processing, communication port control processing is stopped, virtual port control processing is started, and virtual port control start processing, and normality confirmation is performed to send normality confirmation to the line numbers registered in the memory above. It is composed of a start process and an incoming call originator number confirmation process for confirming whether or not the originator number of the received incoming call is the same as the line number registered in the memory.

By adopting such a configuration, the call control processing can be performed without being affected by the communication port in order to confirm the normality of the D channel and without providing a special device to the ISDN device opposite to the ISDN device. Yes, if an incoming call comes in while the ISDN line's normality is being checked, it can be identified whether it is an incoming call corresponding to the outgoing call for normality check or an incoming call from another line. It becomes.

Further, in order to confirm the normality of the B channel, in addition to the configuration according to any one of claims 1 to 3, a predetermined data pattern signal is further registered in the memory.
By providing the data pattern transmitting process for transmitting on the B channel of the SDN line and the confirming process for confirming whether or not the received data pattern signal is the same as the above-mentioned predetermined data pattern signal, However, the normality of the ISDN line can be confirmed by sending the data pattern signal.

Therefore, without using the communication port,
Whether or not the incoming call comes in while confirming the normality of the ISDN line and the incoming call comes in after confirmation,
Or ISD that identifies whether the call is from a completely different line
The normality confirmation method for N lines can be realized.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a method of confirming the normality of a D channel of an ISDN line according to the embodiment of this invention.

FIG. 2 is a configuration diagram of a communication system for confirming normality of an ISDN line of a conventional example.

FIG. 3 is a functional configuration diagram of an ISDN device according to an embodiment.

FIG. 4 is a program configuration diagram of control processing of a virtual port circuit according to the embodiment.

FIG. 5 is a time sequence diagram of the ISDN line normality confirmation method according to the embodiment.

FIG. 6 is a configuration diagram of an ISDN communication system for confirming normality of a B channel according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Data terminal device DTE, 2 ... ISDN line, 3 ... Man-machine interface control circuit, 4 ... Virtual port circuit, 5 ... Communication port, 6 ... Communication port control circuit, 7 ... Layer 1 control circuit, 8 ... Layer 2 control Circuit, 9 ... Layer 3
Control circuit, 10 ... ISDN device, 11 ... ISDN network, 1
2 ... Numeric keypad, 13 ... LCD display.

Claims (4)

[Claims] 1. An I between at least two ISDN devices.
In the normality confirmation method of the ISDN line for confirming the normality of the ISDN line of the communication system in which the SDN line intervenes, one of the above ISDN devices confirms the normality of the D channel. The line number of the ISDN line is registered in the memory, and the line number registration process and the communication port control process for registering the memory to use this line number as the caller number are stopped, and the virtual port control process is started. Virtual port control start processing, normality confirmation start processing for sending a normality confirmation call operation to the line number registered in the above memory, and the caller number of the received incoming call is the line number registered in the above memory. A method for confirming normality of an ISDN line, which comprises an incoming call originator number confirmation process for confirming whether or not they are the same. 2. In the incoming call originator number confirmation processing, if the originator numbers of the incoming calls are the same, a disconnection message is transmitted after a predetermined time as being in communication, and if they are not the same, the incoming call is discarded, 2. The normality confirmation method for an ISDN line according to claim 1, wherein if the incoming call cannot be received within a predetermined time, a disconnection message is sent after a predetermined time. 3. The virtual port control process comprises an empty processing unit, a call processing unit, and a call acceptance processing unit for performing the call control process. Two
The method for confirming the normality of the ISDN line described. 4. A data pattern sending process for sending a predetermined data pattern signal to the B channel of the ISDN line of the line number registered in the memory, and the received data for confirming the normality of the B channel. 4. I according to any one of claims 1 to 3, further comprising a confirmation process for confirming whether or not a pattern signal is the same as the predetermined data pattern signal.
How to confirm normality of SDN line.