JPH1198135A - Isdn channel contract analyzer and terminator using the analyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate the analysis of contract contents of an ISDN channel, especially channel exchange connection for each B channel, propriety of virtual call VC connection or a combination of a terminal equipment identification TEI making permanent virtual circuit PVC connection and a B channel. SOLUTION: A channel contract analysis section 11 of an ISDN channel contract analyzer 1 receives a channel contract contents analysis request from an external request section 2, conducts a layer 2 connection procedure and a packet exchange VC connection setup procedure via a D channel call control section 12, receives and analyzes a reply from an ISD network 6 and displays the discriminated channel contract contents to an external display section 3. The D channel call control section conducts an outgoing procedure and an incoming procedure by making packet communication on a D channel via an S/T bus interface section 13 according to a call request from the channel contract analysis section 11. The S/T bus interface section 13 converts/inversely converts an input output signal from the D channel call control section 12 into a data frame form of the ISD network 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN line contract analyzer and a terminator using the same, and more particularly to an ISDN line analyzer.
Which B channel is used for circuit-switched connection on the ISDN line connected to the line, and which B-channel is used for packet-switched connection and VC connection is possible. ISDN line contract analysis that has the function of analyzing the number of B channels that can be VC-connected simultaneously and the number of B-channels that can be used for PVC connection, and analyzing which B-channels may be used for PVC connection The present invention relates to a device and an ISDN terminating device using the ISDN line contract analysis device.

[0002]

2. Description of the Related Art In accordance with ISDN line contracts, ISD
In order to properly use the N terminal device, it is necessary to correctly set the circuit switching or packet switching for the ISDN terminating device in accordance with the contract contents of the ISDN line. In the conventional ISDN terminating device, this setting is performed manually by a setter. In particular, regarding the contents of the contract for packet switching, the number of B channels that can be connected to VC or the number of B channels that can be used simultaneously, or the combination of TEI (terminal device number) and B channel that use PVC connection is determined at the time of contract. In order to correctly set the ISDN terminating device, the setter needs to fully understand the contents of the contract.

[0003]

Conventionally, there is no means for automatically analyzing the contract contents of the ISDN line and no means for automatically setting the contract contents according to the contract contents. In order to correctly set the terminating device, the setter must fully and accurately grasp the contract contents of the ISDN line and set it properly.

An object of the present invention is to automatically analyze the contents of a contract of an ISDN line so that a setter of an ISDN terminating device connected to the ISDN line can easily and accurately confirm the contents of a contract of the ISDN line. ISD enabled
An object of the present invention is to provide an N-line contract analyzer.

Another object of the present invention is to incorporate the ISDN line contract analyzer to automatically set an ISDN terminating device in accordance with the analyzed contract contents, and to allow the setter to change the ISDN line contract contents. It is an object of the present invention to provide an ISDN terminating device that can make a correct setting without having to know it.

[0006]

SUMMARY OF THE INVENTION An ISDN line contract analysis device according to the present invention is an I / O line connection analysis device connected via an ISDN line.
D-channel call control means for controlling a calling procedure or an incoming call procedure by performing packet communication on a D-channel of the SDN network, and converting and outputting a signal output from the D-channel call control means to a data frame format of the ISDN network. The S / T bus interface means for performing the inverse conversion is connected to the ISDN network via the D-channel call control means in response to a request for analysis of the line contract content from an external request means. Line contract analysis means for analyzing the contract contents of the ISDN line and transmitting the contract contents to an external display means.

In the above-mentioned configuration, the circuit contract content analyzing means determines which B channel can be used for circuit-switched connection with respect to the connected ISDN line by packet switching. Which B channel can be used for a VC (virtual call) connection, and which B can be simultaneously VC connected
It is possible to analyze the contract content of the number of channels and predict which B channel may be used for PVC (permanent virtual circuit) connection.

An ISDN terminating apparatus according to the present invention comprises: an ISDN line contract analyzer having the above configuration; setting means for requesting analysis of the contents of an ISDN line connected to the ISDN line contract analyzer; A setting storage unit for storing and storing the contract details analyzed by the analysis device; and a D-channel call control unit and an S / T bus interface unit for communicating with the ISDN network according to the contract contents stored in the setting storage unit. Communication means for performing call setting and communication.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the outline of the present invention will be described.
The line contract content analysis means receives a request for line contract content analysis from an external request means. Line contract content analysis means D
The layer 2 connection procedure and the packet switching call setup procedure are performed using the channel call control means. I for these procedures
By analyzing the response contents of the SDN line, various contract contents of the connected ISDN line can be detected and displayed on an external display unit. When incorporating into ISDN terminator,
The setting means of the ISDN terminating device outputs a line contract content analysis request, and sets the ISDN terminating device according to the analysis result from the line contract content analyzing means. That is, the setting of the ISDN terminating device can be automatically performed.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of the present invention. In FIG. 1, an ISDN line contract analysis device 1 receives a line contract content analysis request from an external request unit 2, and sends a layer 2 request to a D-channel call control unit 12.
Performs a connection request and a call setup request for packet switching, and
It has a line contract analysis unit 11 for receiving and analyzing a response from the N network 6 via the D channel call control unit 12 and displaying the determined line contract contents on the external display unit 3. The D-channel call control unit 12 performs a calling procedure and an incoming call procedure by performing packet communication on the D channel via the S / T bus interface unit 13 in accordance with a calling request from the line contract analysis unit 11. The S / T bus interface unit 13 converts an input / output signal from the D channel call control unit 12 into a data frame format of the ISDN 6 and performs an inverse conversion.

Next, the ISDN line contract analyzer 1 of this embodiment
FIG. 2 shows the operation of the line contract analysis unit 11 in particular.
And the operation flow chart of FIG.

The line contract analysis unit 11, which has received the line contract content analysis request from the external request unit 2, first requests the D-channel call control unit 12 for a layer 2 connection request by automatic TEI allocation (FIG. 2). Step A1). In the TEI automatic assignment, the D-channel call control unit 12 outputs a TEI assignment request (ID REQ) packet to the ISDN network 6 and receives a TEI assignment response (ID ASS) packet.

When the TEI assignment response is received, it can be detected that this line is a line contract with automatic TEI assignment, that is, that circuit switching connection is possible for all B channels and that there is no PVC connection contract. TE
When the I assignment request is rejected, it can be detected that this line is non-automatic TEI assignment, that is, it is possible to have a PVC connection contract and the number of B channels connectable to the line is limited (step A2).

If TEI automatic allocation is possible (Y side in step A2), a check is made for a B channel to which VC connection is possible. Performs a layer 2 connection procedure by TEI automatic allocation, uses the allocated TEI, specifies one of the B channels, performs call setup for VC connection, and performs IS setup.
A packet switching connection with a local exchange (not shown) of the DN network 6 is attempted. If the call setup is possible, it is understood that VC connection is possible on the B channel. After determining whether the call setup is possible, the packet switching connection is disconnected. This procedure is performed for all the B channels, and a B channel to which a VC connection is possible is detected (step A4).

If the call setting is rejected for all the B channels as a result of the call setting for all the B channels (Y side in step A5), it is determined that the contract is only for the circuit switching connection (step A6). .

If there is a channel for which the call setup was successful and a channel for which the call was rejected (N side in step A5, N side in A7), a contract (service class) in which VC connection is possible only with the B channel specified at the time of contract Is a designated class and the connection mode is general connection) (step A8).

If it is possible to set up a call for all B channels (Y side in step A7), it is considered that the number of B channels that can be simultaneously VC-connected is defined, so the number of simultaneous channels is checked. A VC connection is performed by specifying one B channel using the TEI acquired by the TEI automatic allocation, and the TE connection is performed again without disconnecting the VC connection.
Acquire I and specify another B channel to try VC connection. By repeating this procedure, V
The number of B channels connected to the C connection is increased (step A9).
The number of channels is B which can be specified at the time of contract
It is found that this is the maximum number of channels (step A1)
0, A11).

In the case of non-automatic TEI allocation (N side in step A2), one TEI in the range of 64 to 126 is designated to perform a layer 2 connection procedure (steps B2 and B in FIG. 3).
3).

When the layer 2 connection procedure is rejected, it is found that the TEI cannot be used (N in step B4).
Side, B5).

When the layer 2 connection procedure is successful (Y side in step B4), one B channel is sequentially specified from all the B channels using the TEI to set up a call for VC connection, and the ISDN network 6 To make a packet-switched connection with the local exchange (step B6). When the call setup is possible, it is found that the VC connection and the circuit switching connection in which the B channel is designated by the TEI are possible. If the call setup is rejected, the TEI knows that the combination of B channels will be used for the PVC connection (step B).
7).

By performing these procedures for all combinations of 64 to 126 TEIs and all B channels (steps B3 to B9), a combination that allows VC connection and circuit switching connection, or a combination that is used for PVC connection, or The contents of the line contract as to whether the TEI is not used are determined (step B10).

Next, another embodiment of the present invention will be described.

FIG. 4 is a block diagram showing an ISDN terminator incorporating the line contract analyzer of the present invention. In FIG. 4, the ISDN terminating device 4 of this example receives the request for analyzing the line contract content from the setting unit 44, makes a layer 2 connection request and a call setting request for packet switching to the D channel call control unit 42, and 6 has a line contract analysis unit 41 for receiving and analyzing the response from the D-channel call control unit 42 via the D-channel call control unit 42, and transmitting the determined line contract contents to the setting unit 44. The setting unit 44 outputs a line contract analysis request to the line contract analysis unit 41 and, as a response,
The content of the line contract analysis result received from the server is reflected in the setting storage unit 45. The D channel call control unit 42
S / T bus interface unit 4 in response to a call request from
The calling procedure and the incoming call procedure are performed by performing packet communication on the D channel via the communication terminal 3. The S / T bus interface unit 43 converts an input / output signal from the D-channel call control unit 42 into a data frame format of the ISDN 6 and performs an inverse conversion. The communication unit 46 refers to the contents of the setting storage unit 45 and performs call setting and communication with the ISDN network 6 via the D-channel control unit 42 in accordance with the contents of the line contract.

The line contract analysis operation of the ISDN line termination device 4 of the present embodiment is the same as the operation of the above-described ISDN line contract analysis device 1 and will not be described in detail.

The LCGN required for setting the PVC connection
The set value of the combination of the (logical channel group number) and the LCN (logical channel group) can be kept known by the setter in order to ensure security.

[0027]

According to the ISDN line contract analysis apparatus of the present invention, the contract contents of the ISDN line are automatically analyzed, so that the contract contents of the ISDN line can be easily and accurately obtained even if the setter does not know the contract contents in advance. The ISDN terminal device can be used correctly because the setting can be surely made.

According to the ISDN terminator of the present invention,
Because the contract details of the ISDN line are automatically analyzed and set automatically, the setter does not need to know the contract details of the ISDN line, and there is no need to manually set the contract. Performance and convenience are improved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart illustrating the operation of the present invention, showing the first half thereof.

FIG. 3 is a flowchart illustrating the operation of the present invention, showing the latter half thereof.

FIG. 4 is a block diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 ISDN line contract analyzer 2 request unit 3 display unit 4 ISDN terminator 6 ISDN network 11, 41 line contract analyzer 12, 42 D channel call controller 13, 43 S / T bus interface unit 44 setting unit 45 setting storage unit 46 Communication unit

Claims (3)

[Claims] 1. An I / O connected via an ISDN line.
D-channel call control means for controlling a calling procedure or an incoming call procedure by performing packet communication on a D-channel of the SDN network, and converting and outputting a signal output from the D-channel call control means to a data frame format of the ISDN network. The S / T bus interface means for performing the inverse conversion is connected to the ISDN network via the D-channel call control means in response to a request for analysis of the line contract content from an external request means. An ISDN line contract analysis device, comprising: line contract contents analyzing means for analyzing the contents of a contract of the ISDN line and transmitting the contents of the contract to an external display means. 2. The circuit contract content analysis means determines which B channel can be used for circuit-switched connection with respect to the connected ISDN line, and which B-channel can be used for packet-switched connection. Analyze the contract content to determine if VC (virtual call) connection is possible using B channels and how many B channels can be VC connected at the same time, and use it for PVC (permanent virtual circuit) connection 2. The ISDN line contract analysis device according to claim 1, wherein the potential B channel is predicted. 3. An ISDN line contract analyzer according to claim 1, wherein said ISDN line contract analyzer is connected to said ISDN line contract analyzer. Setting storage means for storing and storing the contract details analyzed by the method, and IS through a D-channel call control means and an S / T bus interface means according to the contract contents stored in the setting storage means.
A communication means for setting up and communicating with a DN network.