JP2601150B2 - ISDN terminal adapter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN terminal adapter for performing interface conversion such as speed conversion and protocol conversion for connecting an existing terminal to ISDN, and more particularly to an ISDN terminal adapter with a maintenance function.

[0002]

2. Description of the Related Art Conventionally, an ISDN terminal adapter having a maintenance function of this type is defined on a diagnostic circuit for self-diagnosing the presence or absence of a failure in the terminal adapter, and on a user-user information field of layer 3 of the ISDN user network interface. A maintenance device for remotely maintaining the terminal adapter via the ISDN based on the information, performing a self-diagnosis of the terminal adapter based on the diagnosis start information defined between the terminal adapters, and then transmitting the diagnosis result to the user. -A configuration is used in which information is returned on the information field between users.

[0003]

This conventional ISDN terminal adapter with a maintenance function allows the terminal adapter to execute diagnosis from a remote maintenance device through the ISDN.
Since the instruction is performed based on the diagnosis start information defined in the information field between the user and the user of the layer 3 protocol of the SDN user network interface, the maintenance of the ISDN terminal adapter can be performed from a remote maintenance device. There was a problem that a maintenance device for performing the above test had to be installed.

[0004] Further, ISDN terminal adapters that can be maintained by the maintenance device are limited to those in which the user-user information defined between the maintenance test device and the ISDN terminal adapter is the same, and maintenance is not possible except for a specific terminal adapter.

In other words, since the definition of information in the user-user information field is different for each terminal adapter manufacturer and the specifications are not unified,
When a telephone operating company or the like performs maintenance including terminal adapters, there is a problem that only terminal adapters of specific manufacturers can be maintained.

It is an object of the present invention to perform a maintenance test on a terminal adapter from a maintenance line using information on a source number, a calling sub address and a called number of a layer 3 of an ISDN user network interface. An object of the present invention is to provide an ISDN terminal adapter capable of performing a test of a terminal adapter without requiring a device.

[0007]

According to the present invention, there is provided an ISDN terminal adapter for performing interface conversion for connecting an existing terminal to an ISDN, a switch for setting a telephone number, and transmission of a layer 3 of an ISDN user network interface. A calling number message translating circuit for translating a number message, a collating circuit for collating a telephone number set by the switch with a calling number translated by the originating number message translating circuit, and performing a diagnosis in accordance with instructions of the collating circuit. An ISDN terminal adapter comprising a diagnostic circuit.

The collating circuit determines that a normal call has been received when the collation results do not match, and determines that the call is a maintenance test call when the collation results match, and activates the diagnostic circuit to convert the interface of the ISDN terminal adapter. The ISDN terminal adapter is characterized in that the diagnosis is performed.

[0009]

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

FIG. 1 is a block diagram showing one embodiment of the ISDN terminal adapter of the present invention.

Referring to FIG. 1, an ISDN terminal adapter 1 of the present embodiment includes an interface conversion circuit 1 for converting an interface between an existing terminal 2 and an ISDN 3.
1, switch 12, and calling number message translation circuit 1
3, a matching circuit 14, and a diagnostic circuit 15.

Next, the operation of this embodiment will be described.

The interface conversion circuit 11 is connected to the existing terminal 2
The user information and the signal input from are converted to the ISDN interface and output to the ISDN 3. Conversely, I
The user information and signal input from the SDN 3 are converted into an existing terminal interface and output to the existing terminal 2.

The maintenance person sets the telephone number of the remote maintenance line for performing the remote maintenance of the terminal adapter through the ISDN 3 in the switch 12.

The calling number message translating circuit 13
When an incoming call is received from N3, the calling number sent from ISDN3 is translated and sent to the matching circuit 14.

The collation circuit 14 collates the transmission number sent from the transmission number message translation circuit 13 with the telephone number set by the switch 12. If the collation results do not match, it is determined that a normal call has been received.

If the collation results match, the collation circuit 14 determines that the call is a maintenance test call and activates the diagnosis circuit 15.

When the test is started from the matching circuit 14, the diagnostic circuit 15 executes the diagnosis of the interface conversion circuit 11, and displays the diagnosis result in the source subaddress portion of the layer 3 of the ISDN user network interface. Report the test result to the remote maintenance line.

[0019]

As described above, the present invention provides an ISDN
A calling number message translating circuit for translating a calling number message of layer 3 of the user network interface, a matching circuit for collating a telephone number set by a switch with a calling number translated by the calling number message translating circuit; A diagnostic circuit for performing a diagnosis in accordance with an instruction performs a maintenance test of the terminal adapter from the maintenance line using the transmission number, calling subaddress and called number information of the layer 3 of the ISDN user network interface. There is no need to install a maintenance test apparatus on the side, and the terminal adapter can be easily tested.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of an ISDN terminal adapter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ISDN terminal adapter 2 Existing terminal 3 ISDN 11 Interface conversion circuit 12 Switch 13 Transmission number message translation circuit 14 Verification circuit 15 Diagnosis circuit

Claims (2)

(57) [Claims] 1. An ISDN terminal adapter for performing interface conversion for connecting an existing terminal to an ISDN, a switch for setting a telephone number, and a calling number message translating circuit for translating a calling number message of Layer 3 of an ISDN user network interface. A collating circuit for collating the telephone number set by the switch with the originating number translated by the originating number message translation circuit; and a diagnostic circuit for diagnosing according to instructions from the collating circuit. ISDN terminal adapter. 2. The collating circuit judges that a normal call has been received when the collation results do not match, and determines that the call is a maintenance test call when the collation results match.
2. The ISDN terminal adapter according to claim 1, wherein diagnosis of interface conversion of the DN terminal adapter is performed.