JP2001339747A - Isdn communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ISDN communication system in which a plurality of ISDN terminals are connected to a station exchanger via an ISDN line, and which allows providing a station service, a charging control and a status monitoring or the like at every ISDN terminal. SOLUTION: In the ISDN communication system, the plurality of ISDN terminals 102 are installed in to an ISDN collector 101 connected to a station exchange 100 via an ISDN line 103. A maintenance device 104 and a service setting means 110 for every dial-in number are connected to the station exchange 100. The ISDN collector 101 comprises a maintenance package 105, an ISDN terminal subscriber number resistor 111, a dial-in number converter 112 and a certification means 113 of subscriber number for maintenance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN (Integrat
ed Services Digital Networks: A communication system, especially a plurality of ISDN terminals,
IS configured by connecting to the central office via an SDN line
It relates to a DN communication system.

[0002]

2. Description of the Related Art Conventional ISDN concentrator services include:
In a PBX (private branch exchange) accommodating an ISDN terminal and connected to the central office via an ISDN line, the service attribute is registered solely in the PBX. Further, the presence or absence of a station service such as a caller ID notification service is determined by the line number of each ISDN line. Therefore, when a plurality of ISDN terminals are accommodated at a multipoint, the service attributes are all the same, and a service cannot be determined for each ISDN terminal accommodated in the PBX.

[0003] In the conventional ISDN terminal extension intercommunication function, an extension number is set for each ISDN terminal accommodated in the PBX in the PBX, and the extension intercommunication is performed using the extension number. For this reason, the I
When an incoming call is made to an SDN terminal from an outside line, it must be used as a subscriber number registered in the central office, and when an incoming call comes from an ISDN terminal under the PBX, it must be used as an extension number.

[0004] In the prior art billing aspect, billing by stations is performed by line number. Since the PBX does not have a line number for each ISDN terminal accommodated under it, the line between the central office exchange and the PBX that can be used by the ISDN terminal is fixed, and charging is performed using the line number between the central office exchange and the PBX. ing. Further, from the viewpoint of maintenance in the prior art, maintenance is performed using D-channel packets, and maintenance such as program download and failure information display using an arbitrary B channel is not performed.

FIG. 16 is a block diagram showing an example of such a conventional technique. It has a PBX 10 and a central office 13 connected by an ISDN line 12. PBX10 has multiple IS
The DN terminals 11A to 11H are connected. The central office 13 is connected to an ISDN terminal 11X. It is assumed that the line number of the ISDN line 12 is "03-XXX-YYYY". When receiving a call from the central office 13, the presence or absence of the calling subscriber number notification service is determined by the line number "03-XXX-".
YYYY "and ISDN terminals 11A to 11H
Can't decide. In other words, the line number "03
If "-XXX-YYYY" indicates that there is an outgoing subscriber number notification, all of the ISDN terminals 11A to 11H have outgoing subscriber number notifications, and all have the same service attribute. Also, the ISDN terminal 11X to the ISDN terminal 11B
Is called, as shown in FIG.
The N terminal 11X has the line number “03-XXX-YYYY”
Dial.

On the other hand, when calling the ISDN terminal 11B from the ISDN terminal 11A, the extension number "1235" of the ISDN terminal B must be dialed as shown in FIG. This means that the same ISDN terminal 11B number must be used depending on the ISDN terminal 11 used. Further, billing in the central office 13 is performed with the line number "03-XXX-YYYY".
Therefore, the ISDN terminal 11A accommodated in the PBX 10
ＨH, no matter which ISDN terminal 11 is used for calling, the line number “03-XXX-YYYY” must be charged, so that a line that can be used by the ISDN terminal 11 can be arbitrarily selected. Can not.

[0007]

The problem of the prior art described above is that the ISDN between the central office exchange and the PBX, such as the PBX,
In a system aiming for the effect of line collection to make effective use of the line,
The ISDN line of the central office is terminated once, and the ISDN terminal is accommodated under the PBX. Therefore, IS under PBX
That is, provision of station services, charge management, and the like cannot be performed for each DN terminal. Furthermore, when calling a PBX-distributed ISDN terminal, it is necessary to use different numbers for calling depending on whether the call is made from under the central office or under the same PBX. In addition, maintenance such as program download and status monitoring is not performed using the communication channel from the station center.

[0008]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a central office exchange that manages office services for each dial-in number,
The N concentrator accommodates ISDN terminals whose dial-in number is a self-subscriber number, provides the same service as when directly connected to the central office, and achieves the ISDN line concentrating effect between the central office and the ISDN concentrator. It is to provide an ISDN concentrator. Another object of the present invention is to perform maintenance of the ISDN concentrator in the station system from the station center by performing a fault display of the ISDN concentrator from the station, performing a health check for checking the normality, and downloading a program for updating the program. To provide an ISDN communication system.

[0009]

An ISDN communication system according to the present invention accommodates a plurality of ISDN terminals in an ISDN concentrator connected to a central office via an ISDN line.
The central office exchange is provided with a service setting means for each dial-in number, and the ISDN concentrator transmits incoming information received by the dial-in number to the ISDN terminal.

According to a preferred embodiment of the present invention, the ISDN
In the line concentrator, I register an extension for each dial-in number.
SDN terminal subscriber number registration means is provided. ISDN
The line concentrator is provided with dial-in number conversion means for converting a dial-in number into a line number in order to charge at the central office. The central office exchange is provided with a maintenance device for monitoring line conditions, and the ISDN concentrator is provided with a maintenance package accessed from the maintenance device. A program can be downloaded from the maintenance device to the maintenance package via the ISDN concentrator. The ISDN concentrator uses the maintenance subscriber number to send the ISDN
A maintenance subscriber number confirming means for checking an incoming call to the concentrator is provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction and operation of a preferred embodiment of an ISDN concentrator according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a basic configuration of an ISDN concentrator according to the present invention. This system comprises a central office 100 and an ISDN concentrator 101 connected thereto via an ISDN line 103. A plurality of ISDN terminals 102A to 102H are connected to the ISDN concentrator 101 in a point-multipoint manner. Change the line number of the ISDN line 103 to "03-X
In the case of "XX-YYYY", the operation of receiving an incoming call from the central office 100 is shown in FIG. By determining whether or not the caller ID display service is provided by the central office 100 based on the dial-in number, it is possible to determine whether or not the service is provided for each of the ISDN terminals 102A to 102H. That is, the ISDN terminal 102
Which of the ISDN terminals A to H has the line number "03-XXX-
"YYYY" and ISDN terminal 1
The presence or absence of the caller ID display can be determined for each of 02A to H.

On the other hand, as shown in FIG. 1B, when the ISDN terminal 102A calls the ISDN terminal 102B, the destination number in the transmission information notified from the ISDN terminal 102A is the extension number of the ISDN terminal 102. 123
4 "," 1235 ", etc., but a subscriber number. The ISDN concentrator 101 checks this called number, and if the called number can be recognized as a number registered in the ISDN concentrator 101, the calling information is transmitted to the central office 10
0 is not notified, the ISDN terminal 102B is called back in the ISDN concentrator 101. This allows I
Communication between SDN terminals can be performed.

When a call is originated from the ISDN terminals 102A to 102H, no matter which terminal originates the call, the central office 10
0 is one ISDN line number "03-XXX-YYY"
In the ISDN concentrator 101, the caller number (Y) is charged, and the caller number (subscriber number of the ISDN terminals 102A to 102H), which is a dial-in number, is converted into a line number (charging number) "03-XXX-YYYY". Need to do. This conversion is performed in the ISDN concentrator 101, and this is notified to the central office 100. Thus, no matter which ISDN terminal 102A-H originates the call, the caller number notified to the central office 100 is the line number "03-XXX-YY".
YY ", and charging with the line number becomes possible.

On the other hand, the maintenance subscriber number is set to "03-XXX".
In the case of “−ZZZZ”, connection for the station maintenance device to maintain the ISDN concentrator 101 is performed by the maintenance device having the subscriber number “03-XXX-ZZZZ” call the ISDN concentrator 101. ISDN concentrator 10
1 checks the called number from the incoming call information. When it is confirmed that the destination number is "03-XXX-ZZZZ", the terminal is connected to the maintenance package in the ISDN concentrator 101. Then, using any connected B channel,
Program download and line status confirmation can be performed.

FIG. 2 is a block diagram showing the configuration of a preferred embodiment of the ISDN concentrator according to the present invention. The system shown in FIG. 2 includes a central office 100, an ISDN concentrator 1
01, ISDN terminals 102A-H, ISDN line 10
3. Maintenance device 104, maintenance package 105, service setting means 110 for each dial-in number, ISDN terminal subscriber number registration means 111, dial-in number conversion means 11
2 and a maintenance subscriber number confirmation unit 113.

The functions or operations of the components of the system shown in FIG. 2 will be described. The service setting means 110 for each dial-in number is an ISD contained in the ISDN concentrator 101.
For each dial-in number (subscriber number) of the N terminal 102, the presence / absence setting of the office service such as the presence / absence of the caller ID notification is performed. Also, the ISDN terminal subscriber number registration means 111
The dial-in number (subscriber number) of the ISDN terminal 102 and the extension number corresponding to the dial-in number are registered in the ISDN concentrator 101. ISDN terminal 1
02, the dialed called number is checked, and if it is a subscriber number registered in the ISDN concentrator 101, it is not notified to the central office 100 and the ISDN
The communication is turned back in the line concentrator 101 to enable communication.

On the other hand, dial-in number conversion means 112
Converts the dial-in number into a line number in the ISDN concentrator 101 in order to charge in the central office 100 and notifies the central office 100 of it. The maintenance subscriber number confirming means 113 uses the maintenance subscriber number from the maintenance device 104 connected to the central office 100 to make an incoming call to the ISDN concentrator 101. ISDN concentrator 101
Checks the called number, and if it matches the maintenance subscriber number, connects to the maintenance package 105 in the ISDN concentrator 101. A program is downloaded from the maintenance device 104 and a line state is monitored on the communication channel formed here.

Next, the operation of the entire system shown in FIG. 2 will be described in detail. Central office switch 100 to ISDN concentrator 1
When the call is received by the ISDN terminal 102 accommodated in 01, the central office exchange 100 checks the registered service by the dial-in number-based service setting means 110 for the called number. 3 to 7 show specific examples of the service setting unit 110 for each dial-in number. FIG. 3 includes dial-in number, calling subscriber number notification, billing, UUI, sub-address notification, and other services. FIG. 4 shows the dial-in number, the billing, the site, the signal notified from the terminal, and the signal notified to the station. FIG. 5 shows a dial-in number,
Fig. 3 shows a calling subscriber number notification, a signal from a site, a station, and a signal notified to a terminal. On the other hand, FIG. 6 shows a dial-in number, a UUI, a site, a signal notified from a station, and a signal notified to a terminal. FIG. 7 shows a dial-in number, a sub-address notification, a part, a signal from a station, and a signal to be notified to a terminal.

If the calling subscriber number notification of the above-mentioned service setting means 110 for each dial-in number is enabled, as shown in the sequence diagram of FIG. 11, information of "caller number notification is present" is included in the SETUP message. The central office 100 notifies the ISDN concentrator 101 of the information. I
The SDN concentrator 101 confirms the destination from the received SETUP message, and checks the ISDN terminal 1 that is the destination.
02A is transmitted and notified of the received SETUP message. As a result, the office service notified from the central office 100 is notified to the ISDN terminal 102 as it is,
The same station service as when the DN terminal 102 is directly accommodated in the central office 100 can be provided.

Next, the case where a call is transmitted between the ISDN terminals 102, for example, from the ISDN terminal 102A to the ISDN terminal 102B will be described with reference to the sequence diagrams of FIGS. First, the ISDN terminal 102A
Dial the dial-in number (subscriber number) of the N terminal 102B. As shown in FIG. 12, the ISDN terminal 102A
The dial-in number of the ISDN terminal 102B is set to the "call destination number" in the SETUP message notified to the ISDN concentrator 101 from. Therefore, ISDN concentrator 1
No. 01 checks whether this “destination number” is a dial-in number or extension number registered in the ISDN terminal subscriber number registration means 111 in the ISDN concentrator 101. FIG. 8 shows an example of the ISDN terminal subscriber number registration means 111. That is, for example, extension numbers 1, 2, 3,... Are registered for each dial-in number A, B, C,.

If the above "destination number" is a number registered in the ISDN terminal subscriber number registration means 111,
The SETUP message is not notified to the central office 100, but is returned in the ISDN concentrator 101 and received by the ISDN terminal 102B as shown in FIG. Also, as with the prior art, in order to enable incoming calls even with extension numbers, ISD
If the number dialed by the N terminal 102A is an extension number, the extension number is converted into a dial-in number, and the ISD
A SETUP message is transmitted to the N terminal 102B. If the number is not registered, the central office 1
00 is notified of a SETUP message, and a normal outgoing connection is made.

Next, billing when making a call from the ISDN terminal 102 is performed in the central office 100 using the line number. Therefore, the ISDN concentrator 101 has the configuration shown in FIG.
As shown in the sequence diagram of FIG. 4, the dial-in number conversion means 112 converts the dial-in number of the ISDN terminal 102 corresponding to the "calling number" into the "line number". FIG.
An example of the dial-in number return means 112 is shown, and for each dial-in number A, B, C,.
A, ... are registered. The "calling number" is changed and notified to the central office 100. As a result, the central office 100
Can be charged by "line number". FIG. 15 shows an example of a message structure at the time of dial-in number conversion. That is, the transmission information 11A composed of the transmission information identifier 11a, the calling number (dial-in number) 11b and the other information 11c is replaced with the transmission information identifier 11a, the billing number (line number) 11b 'and the other information 11c. Is converted into transmission information 11B.

Next, a case where a program is downloaded from the maintenance device 104 to the ISDN concentrator 101 will be described. The maintenance device 104 causes the ISDN concentrator 101 to receive a call with the maintenance subscriber number as a called number. ISD
The N concentrator 101 checks the called number by the maintenance subscriber number confirming means 113 illustrated in FIG. As a result of this check, if it can be recognized as the maintenance subscriber number, it is connected to the maintenance package 105. And the maintenance device 10
4 is received by the maintenance package 105.

The configuration and operation of the preferred embodiment of the ISDN communication system according to the present invention have been described above in detail. But,
Such embodiments are merely illustrative of the present invention and do not limit the present invention in any way. It will be readily apparent to those skilled in the art that various modifications can be made without departing from the spirit of the invention.

[0026]

As will be understood from the above description, according to the ISDN communication system of the present invention, the following various remarkable practical effects can be obtained. First, by connecting an ISDN terminal via an ISDN concentrator rather than accommodating the ISDN terminal directly in the central office exchange, transmission of connection information and connection using a dial-in number are enabled.
Effective use of the SDN line can be achieved. Second, only the information elements necessary for providing the station service to a plurality of ISDN terminals accommodated in the ISDN concentrator are transmitted through the ISDN concentrator as it is, and the station service can be realized by the ISDN terminal under the concentrator. Third, when a plurality of ISDN terminals accommodated in the ISDN concentrator dial out a subscriber number managed by the central office exchange or an extension number managed by the ISDN concentrator to make a call, the call is terminated in the ISDN concentrator. Check the destination number, and if the destination is an ISDN terminal housed in the same line concentrator, loop back in the ISDN line concentrator to avoid the use of station equipment, avoid call charges, and reduce traffic on the central office exchange. , And communication between ISDN terminals can be performed.

Further, according to the billing form of the central office,
The ISDN terminals accommodated in the ISDN concentrator at multiple points can be charged in the ISDN concentrator at the multi-point in the central office by directly changing the dial-in number or converting the dial-in number into a line number accommodated in the DN concentrator. Finally,
It is possible to perform a fault display of the ISDN concentrator, a health check for confirming normality, and a program download for updating the program from the station, and perform maintenance of the ISDN concentrator in the station system at the station center.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a basic principle of an ISDN communication system according to the present invention.

FIG. 2 is a block diagram showing a configuration of a preferred embodiment of an ISDN communication system according to the present invention.

FIG. 3 is a diagram showing a specific example of a service setting unit for each dial-in number shown in FIG. 2;

FIG. 4 is a diagram showing a specific example of a service setting unit for each dial-in number shown in FIG. 2;

FIG. 5 is a diagram showing a specific example of a service setting unit for each dial-in number shown in FIG. 2;

FIG. 6 is a diagram showing a specific example of a service setting unit for each dial-in number shown in FIG. 2;

FIG. 7 is a diagram showing a specific example of a service setting unit for each dial-in number shown in FIG. 2;

FIG. 8 is a diagram showing a specific example of the ISDN terminal subscriber number registration means shown in FIG. 2;

9 is a diagram showing a specific example of the dial number conversion means shown in FIG.

FIG. 10 is a diagram showing a specific example of a maintenance subscriber number confirmation unit shown in FIG. 2;

FIG. 11 is a sequence diagram illustrating station service transmission in the ISDN communication system of FIG. 2;

FIG. 12 is a diagram showing an IDN in the ISDN communication system shown in FIG. 2;
FIG. 4 is a sequence diagram illustrating an SDN concentrator loopback function.

FIG. 13 shows a diagram of I in the ISDN communication system shown in FIG. 2;
FIG. 9 is a sequence diagram of an SDN concentrator loopback function.

FIG. 14 is a sequence diagram at the time of dial-in number conversion of the ISDN communication system shown in FIG. 2;

15 is a diagram showing an example of a message configuration at the time of dial-in number conversion in the ISDN communication system shown in FIG. 2;

FIG. 16 is a block diagram showing a configuration of a conventional ISDN communication system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 central office switch 101 ISDN concentrator 102 ISDN terminal 103 ISDN line 104 maintenance device 105 maintenance package 110 service setting means for each dial-in number 111 ISDN terminal subscriber number registration means 112 dial-in number conversion means 113 maintenance subscriber number confirmation means

Claims (6)

[Claims] An ISDN concentrator connected to a central office via an ISDN line accommodates a plurality of ISDN terminals. The central office is connected to a service setting means for each dial-in number, and the ISDN concentrator includes: An ISDN communication system, characterized in that incoming information arriving at a dial-in number is transmitted to the ISDN terminal. 2. The ISDN communication system according to claim 1, wherein said ISDN concentrator has ISDN terminal subscriber number registration means for registering an extension number for each dial-in number. 3. The ISDN concentrator according to claim 1, further comprising dial-in number conversion means for converting a dial-in number into a line number for charging at the central office. ISDN communication system. 4. A maintenance device for monitoring line status is connected to the central office, and a maintenance package accessed from the maintenance device is provided in the ISDN concentrator. ISD according to 2 or 3
N communication systems. 5. The ISDN according to claim 4, wherein a program can be downloaded from said maintenance device to said maintenance package via said ISDN concentrator.
Communications system. 6. The ISDN concentrator is provided with a maintenance subscriber number confirming means for checking an incoming call from the maintenance device to the ISDN concentrator using a maintenance subscriber number. The IS according to claim 4 or 5.
DN communication system.