JP3001272B2 - ISDN subscriber line channel monitor system - 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 subscriber line channel centralized monitoring system, and more particularly, to an ISDN (Integrated Services Digital Network) network for centrally monitoring messages between terminals and a network at an integrated maintenance center. It relates to a centralized monitor system.

[0002]

2. Description of the Related Art In the ISDN, unlike the conventional telephone network, since the protocol of the network and the terminal is complicated, the terminal cannot be connected due to protocol mismatch. Alternatively, a case may occur in which a certain additional service cannot be used.
To confirm such protocol inconsistency, it is necessary to accumulate and analyze messages actually exchanged between the terminal and the network.

For this purpose, the contents of the D channel are monitored in the case of a circuit switching terminal, the contents of the D channel are monitored in the case of a D channel packet in the case of a packet terminal, and the contents of the B channel are monitored in the case of a B channel packet. It is necessary to accumulate messages on the monitor device.

However, on the subscriber line, B channel / D
Since the channels are time-division multiplexed, it is necessary to connect a monitor terminal to a specific portion of the switching hardware after channel separation in order to perform such monitoring.

[0005] Then, the monitor device is a distributed ISDN.
Each switch is connected and monitored.

[0006]

However, if a monitor device is connected to each ISDN exchange and monitoring is performed using the monitor device, an operator dedicated to the monitor is required for each ISDN exchange, and the unmanned operation of each exchange is required. Maintenance work cannot be planned.

[0007] The present invention has been made in view of the above points,
It is an object of the present invention to provide an ISDN subscriber line channel centralized monitoring system capable of monitoring an arbitrary subscriber channel centering on a centralized maintenance center without placing a monitoring operator for each ISDN exchange.

[0008]

The present invention adopts the following means in order to solve the above-mentioned problems. (1) In other words, as shown in FIG.
In the ISDN to which the DN exchange is connected, the ISDN
A centralized maintenance center (CMOC) controlled by the operation processor (107) is connected to (26), a monitor device (28) is connected to the centralized maintenance center (CMOC), and a monitored object is added from the centralized maintenance center (CMOC). Input a monitor command to specify the
The ISDN subscriber line channel centralized monitoring system is characterized in that data in a monitored subscriber line channel designated by inputting a command is sent to the monitor device (28).

Here, a plurality of the monitoring devices (28) are connected to the central maintenance center, and when a monitor command for specifying a monitored subscriber line channel is input from the central maintenance center, the monitoring device to be output is specified. A command may be entered to send the data in the designated monitored subscriber line channel to the designated monitoring device. (2) In (1), the ISDN exchange separates and multiplexes the time slot of the basic interface (11, 12) into a D channel and a B channel by a digital subscriber line signal controller (15). B-channel and D-channel time slots of the subscriber line signal controller (15) and the primary rate interface (19)
B and D channel time slots are multiplexed by the concentrator switch device (16), and the time slots of the concentrator switch device (16) are transferred to the ISDN (26) via the main processor accommodating switch device (24). With the connection structure, when a command is input to the operation processor (107) of the centralized maintenance center (CMOC),
A monitor device interfacer (27) of a central maintenance center (CMOC) is connected to a digital terminal (101) of a main processor accommodating switch device (24) accommodating a monitored subscriber. At (24), the digital terminal (10
Two time slots (CT) corresponding to the accommodation position of (1)
S1, CTS2) and the hunted two free time slots (LTS1, LTS2) are bidirectionally connected, and the concentrator switch device (16) connects the hunted two time slots (LTS1, LTS2) to the monitored subscriber. And the downlink time slots (DTS1 and DTS2) corresponding to the designated channel and the designated channel are bi-directionally connected, and the digital subscriber line signal control device (15) controls the designated subscriber's designated channel. In addition to the up and down time slots for the ISDN (26), the up and down time slots (DTS1, DTS2) corresponding to the monitored subscriber accommodating position and the designated channel are separately stored.
It is advisable to make a connection to the server.

More specifically, in (1), the I
SDN exchange has basic interface (11,12)
Is divided into a D channel and a B channel by a digital subscriber line signal controller (15) and multiplexed, and the time slots of the B and D channels of the digital subscriber line signal controller (15) are The time slots of the B and D channels of the group speed interface (19) are multiplexed by the concentrator switch device (16), and the time slots of the concentrator switch device (16) are transmitted via the main processor accommodating switch device (24). IS
The ISDN subscriber signal control device (15) accommodated in the concentrator switch device (16) is configured to connect the uplink and downlink of a designated channel to specific time slots (DTS1, DTS2), respectively. When a command is input to the operation processor (107) of the centralized maintenance center (CMOC), the centralized maintenance center (CMO)
C) The monitoring device interfacer (27) and the main processor accommodating switch device (2) accommodating the monitored subscriber.
4) Make a connection with the digital terminal (101), then hunt two empty time slots (LTS1 and LTS2) between the main processor (25) and the concentrator processor (21), and The main processor (2) of the accommodated main processor switch device (24)
5) sends to the concentrator processor (21) a "concentrator switch device connection request message" using LTS1, LTS2, DTS1, and DTS2 as parameters;
R25 knows the two time slots (CTS1 and CTS2) used by the two calls, so that LST1 and CTS
S1, means for bidirectionally connecting the LTS2 and the CTS2, and the concentrator processor (21), upon receiving the "concentrator switch device connection request message",
According to the above parameter values, LTS1, DTS1, LT
Means for bidirectionally connecting S2 and DTS2, and sending a "concentration switch device connection response message" to the main processor (25) of the main processor accommodating switch device (24) accommodating the monitored subscriber; When the main processor (25) of the main processor accommodating switch device (24) accommodating the user receives the "concentration switch device connection response message", the digital subscriber line signal control device (15) is designated by a command. Means for sending a "channel interrupt request message" having the subscriber accommodation position of the monitored subscriber and the channel number as parameters,
Upon reception of the "channel interrupt request message" by the digital subscriber line signal control device (15), the switching means is switched, and the "channel interrupt response message" of the main processor accommodating switch device (24) in which the monitored subscriber is accommodated. Means for sending to the main processor (25), and the main processor (25) of the main processor accommodating switch device (24) accommodating the monitored subscriber, receiving the "channel interrupt message", An autonomous message indicating that it is possible to send the downlink to the monitor device (28) of the centralized maintenance center (CMOC) is output, and each is output to the centralized maintenance center (C
MOC) means for realizing a B-channel monitor connection in the absence of a call as described above, and when there is an outgoing or incoming call to the monitored subscriber, a concentrator processor (21) And means for allocating a B channel to be monitored to the call.
(3) Further, the ISDN exchange (LS) separates and multiplexes the time throttle of the basic interface (11, 12) into a D channel and a B channel by a digital subscriber line signal controller (15), and B-channel and D-channel time slots of the subscriber line signal controller (15) and the primary rate interface (19)
B and D channel time slots are multiplexed by the concentrator switch device (16), and the time slots of the concentrator switch device (16) are multiplexed by the main processor accommodating switch device (24) to be ISDN (26). When the command is input to the operation processor (107) of the centralized maintenance center (CMOC), the monitoring device interfacer (27) of the centralized maintenance center (CMOC) and the accommodation of the monitored subscriber are triggered. The main processor accommodating switch device (24) is connected to the digital terminal (101), and the main processor accommodating switch device (24) connects two time slots (CTS1) corresponding to the accommodating position of the monitor device (28). , CTS2)
And hunted empty time slots (LTS1, LTS
2), and the concentrator switch device (16) sets the time slot (DTS1) corresponding to the subscriber accommodation position and the designated channel and the designated channel to IS.
The time slot (DT) supplied to the DN (26) or the signal control device (22) of the concentrator switch device (16)
S2) may be connected bidirectionally to each other, and may be connected to each of the two hunted free time slots (LTS1 and LTS2).

More specifically, in (1), the I
The SDN exchange (LS) has a basic interface (11,
The time throttle of 12) is separated and multiplexed into a D channel and a B channel by a digital subscriber line signal controller (15), and the digital subscriber line signal controller (15) is used.
Concentrator stage switching device (16) using the B and D channel time slots of the primary group speed interface (19) as the B and D channel time slots.
The time slot of the concentrator switch device (16) is multiplexed by the main processor accommodating switch device (24) and connected to the ISDN (26). By operating the control memory by (21), the multiple connection function and the operation processor (107) of the central maintenance center (CMOC) are
Upon the command input, two free time slots (LTS1 and LTS2) between the main processor (25) of the main processor accommodating switch device (24) accommodating the monitored subscriber and the concentrator processor (21)). ), And the LTS1, LTS2,
A “concentrator switch unit multiple connection request message” having DTS1 and DTS2 as parameters is sent to the concentrator processor (21), and the time of the switch device corresponding to the monitor unit accommodating position information of the centralized maintenance center (CMOC) is determined. Means for calculating slots (CTS1, CTS2) and connecting unidirectionally from LTS1 to CTS1, from LTS2 to CTS2, and a concentrator processor (2
1) means for determining connection target time slots DTS1 and DTS2 according to the following (a) or (b) theory upon receipt of the "concentrator switch device multiple connection request message"; Case DTS1 = Time slot corresponding to the relevant D channel DTS2 = Time slot of the partner terminal connecting the relevant D channel (b) B channel monitor case i) When there is a call DTS1 = Time slot corresponding to the relevant B channel DTS2 = main processor (2
5) -Time slot between concentrator processors (21) ii) When there is no call DTS1 = Time slot corresponding to the B channel DTS2 = Main processor (25) in an appropriate empty state
Time slot between concentrator processors (21) DTS1 <-> D
TS2 bidirectional connection and DTS1-> CTS1, DTS2
Means for making a one-way connection of CTS2 and transmitting a "concentrator switch device multiple connection response message" to the main processor (25) of the main processor accommodating switch device (24) accommodating the monitored subscriber; The main processor (25) of the main processor accommodating switch device (24) accommodating the monitor subscriber, upon receiving the "concentrator switch device multiple connection response message", monitors the uplink and downlink of the designated channel by the monitor device ( 28) means for outputting an autonomous message indicating that it is possible to send the message to the centralized maintenance center (CMOC) and realizing a B-channel monitor connection when there is no call,
Thereafter, when there is an outgoing or incoming call to the monitored subscriber, the concentrator processor (21) includes means for controlling the call to use the monitored B channel and the DTS2. It is preferable to use a channel centralized monitoring method.

[0012]

According to the present invention, a monitor command for specifying a monitored subscriber line channel is input from a centralized maintenance center (CMOC), and the input of the monitor command causes
The connection control is performed by the concentrator switch of the DN exchange, and the data in the designated monitored subscriber line channel is sent to the monitor device (28).

Therefore, the centralized maintenance center (CMO)
From C), simply enter the necessary command and ISDN
An arbitrary subscriber channel can be monitored by the monitor device by controlling the connection in the concentrator switch of the exchange.

[0014]

[Embodiment 1] An embodiment of the present invention will now be described with reference to FIG.
This will be described with reference to FIG.

FIG. 1 shows a configuration diagram of the system of the present invention. First,
To describe ISDN exchange the (LS), in FIG. 1, the terminal 10 ₁ to 10 ₄ of the subscriber base interface 11, 12
Digital subscriber line circuits (DLC) 13, 14
Digital subscriber line signal controller (DL)
CC) 15.

The DLCC 15 multiplexes the time slots of each basic interface into B and D channels separately, and connects them to a concentrator switch device (LC-NW).

The private branch exchange (PBX) 18 to which the terminals 17 _{1 to} 17 _n are connected is connected to the primary rate interface 1.
9 through a digital terminal (DT) 20
It is connected to C-NW16.

The LC-NW 16 is a concentrator processor (LP)
R) 21 controls the primary group speed interface 1
9 are separated from the B channel and the D channel, and the multiplexed D channel time slots of the respective interfaces 11, 12, and 19 are connected to the signal control device (SGC) 22 to multiplex the B channel. The time slots of the main processor accommodating switch device (CPR-
NW) 24.

The above is the structure of the ISDN exchange (LS). Here, the CPR-NW 24 is a main processor (CP
R) 25, multiplexes the time slot from the LC-NW 16 and connects to the ISDN 26, and via the digital terminals (DT) 101 and 102, the relay station (TAN).
DEM), and the time slot of this DSM is further connected to the digital terminal (DT) 10.
Digital Link Interface Controller (DLI) 1 of Centralized Maintenance Center (CMOC)
06.

The DLI 106 is an operation processor (MAIN SYSYTE) having an input means for inputting a command.
M) 107. Under the control of the DLI 106, the time slot from the relay station is connected to the monitor device 28 via the monitor device interfacer (MLME) 27.

The MLME 27 has a DLI1 as shown in FIG.
The time slot CTS1 for monitoring a predetermined channel supplied from the terminal 06 via the terminal 30 is supplied from the terminal 31 to the monitor device 28 and turned back to be supplied from the terminal 32 to the DLI 106, and from the DLI 106 to the terminal 3
A monitoring time slot CTS2 for a predetermined channel, which is supplied via a third channel, is supplied from a terminal 34 to a monitoring device 28.
To the DLI 106 from the terminal 35
To supply.

FIG. 3 shows a DLC of the embodiment of FIG. 1 according to the present invention.
FIG. 2 shows a configuration diagram of multiple connection by C15. In this embodiment, the D channel and the B channel of the subscriber of the basic interface can be monitored. FIG. 3 shows a connection at the time of monitoring the D channel.

FIG. 4A shows the DL when the D channel is monitored.
The connection state of CC15 is shown. In the figure, terminals 40 and 12D
The time slot coming from the up line of the LC 13 is supplied to the dropper 41, the separated B channel is supplied to the switch 42, and the D channel is supplied from the dropper 43 via the inserter 44 to the terminal 45 via the LC-NW 16.
And is supplied to the SGC 22.

During monitoring, this D channel is connected to the dropper 4
3 from the switch 42 via the multiplexer 46 and the inserter 47 to the LC-NW 16
7 is supplied. The D-channel time slot turned back by the MLME 27 is supplied from the switch 42 to the dropper 48, separated, and inserted into the time slot output to the terminal 45 by the inserter 44.

The terminal D receives the time slot of the downstream D channel from the SGC 22 and is supplied from the dropper 51 and the inserter 52 to the inserter 53, where it is multiplexed with the time slot of the B channel from the switch 42. The D channel is sent from the terminal 54 to the down line of the DLC 13. During monitoring, the D channel is supplied from the dropper 51 to the MLME 27 from the switch 42 via the multiplexer 46 and the inserter. , From the inserter 52 to the inserter 53.

Here, since the transfer speed at the terminals 40 and 50 is 64 kbps, the time slot of the D channel is the first and fifth bits as shown in FIG. Two bits in the down direction are accommodated in six bits.

The DLCC 15 performs the connection shown in FIG. 5 when monitoring the B channel. In the figure, DLC is connected to terminal 60.
The time slot coming from the ascending line of C13 is supplied to the switch 63 from the dropper 61 and the inserter 62. However, the time slot of the specific subscriber is separated by the dropper 61 and the inserter 64 and the switch 63 to the LC-NW16.
The specific time slot that has been returned to the MLME 27 and entered the switch 63 is separated by the dropper 65 and multiplexed by the inserter 62 into a B-channel time slot toward the switch 63. The downstream time slot supplied from the switch 63 is transmitted to the downstream line of the DLC 13 through the path of the dropper 66, the inserter 67, and the terminal 68. The time slot of the downstream B channel of the specific channel is separated by the dropper 66, and the inserter 69, Output from the switch 63 to the LC-NW 16 and the MLME 27
The specific time slot returned to the switch 63 and entering the switch 63 is separated by the dropper 70 and multiplexed by the inserter 67 into the time slot of the B channel transmitted from the terminal 68.

Hereinafter, the monitoring procedure will be described based on the configuration diagram of the multiple connection by the DLCC in FIG. 3 and the signal sequence diagram at the time of the multiple connection in FIG.

First, when a command is input to the operation processor (107) of the centralized maintenance center (CMOC), the operation processor (107) of the centralized maintenance center (CMOC) and the main host of the monitored subscriber are accommodated. The connection with the main processor (25) of the processor accommodation switch device (24) is performed.

That is, a command designating the station number of the station accommodating the monitored subscriber, the accommodating position (telephone number) and channel number of the monitored subscriber, and the accommodating position of the monitor device is transmitted from the operation processor 107 of the CMOC. Upon input, the CMOC analyzes the station number to generate two specific calls having the following numbers. Of these two calls, one
One is for the up line of the monitor line, and the other is for the down line.

XXX + monitor telephone number to be monitored + channel number ... (where XXX is a number for identifying a monitoring call) The line used at this time is: COMC-relay station-
Routes are separated between the LSs in advance, and the routes are used only by monitor calls.

The relay station connects the bus by translating the numbers of the formula into numbers, and finally two calls arrive at the LS accommodating the monitored subscriber. The LS numerically analyzes the LS to identify the monitored subscriber telephone number and channel number.

Next, the CP accommodated by the monitored subscriber
R25 hunts two time slots (LTS1 and LTS2) between CPR25 and LPR21,
Send an “LC-NW connection request message” using LTS1, LTS2, DTS1, and DTS2 as parameters.

Here, DTS1 and DTS2 are DLCC1
5 indicates the contents of the up and down directions of the designated channel as LC-
This is a specific time slot when outputting to the NW 16, and the CPR 25 in which the monitored subscriber is accommodated calculates this specific time slot from the subscriber's telephone number and channel number specified by the command.

Since the CPR 25 knows two time slots (CTS1 and CTS2) used by the two calls, the CPR 25 bidirectionally connects LST1 and CTS1, and LTS2 and CTS2. This connection principle diagram is shown in FIGS.
Shown in

In FIG. 6, the contents A1, A2 of the time slots LTS1, LTS2 coming from the LC-NW 16 are written to the primary time switch memory 80a. The time switch memory 80a is a random write and a sequential read, and the write timing is designated by the control memory 80b.

The time slot read from the primary time switch memory 80a is written to the secondary time switch memory 81a. Secondary time switch memory 81
“a” is a sequential write and a random read. The read timing is specified by the control memory 81b, whereby the contents of the time slots CTS1 and CTS2 transmitted to the MLME 27 via the DLT 106 are A1 and A2, respectively.

The contents B1, B2 of the time slots CTS1, CTS2 coming from the MLME 27 via the DLT 106 are written to the primary time switch memory 82a. The time switch memory 82a is a random write and a sequential read, and the write timing is designated by the control memory 82b.

The time slot read from the primary time switch memory 82a is written to the secondary time switch memory 83a. Secondary time switch memory 83
“a” is a sequential write and a random read, and the read timing is designated by the control memory 83b, whereby the contents of the time slots CTS1 and CTS2 transmitted to the MLME 27 are B1 and B2, respectively.

The LPR 21 uses “LC-N” from the CPR 25.
In response to the "W connection request message", the LC-NW 16 is controlled and the time slots LTS1 and DTS are set as shown in FIG.
1, LTS2 and DTS2 are bidirectionally connected, and “LC-
NW connection response message "to the CPR 25.

In FIG. 7, the incoming time slot DTS
1, DTS2, LTS1, LTS2 contents A1, A
2, B1, B2 are written to the time switch memory 85. The time switch memory 85 is a sequential write or a random read. The read timing is designated by the control memory 86, and the time slots DTS1, DTS2, LTS1, and LTS2 to be transmitted are thereby specified.
The respective contents are B1, B2, A1, A2.

When the CPR 25 accommodating the monitored subscriber receives the “LC-NW connection response message”,
A "channel interrupt request message" is sent to the CC 15 with the accommodation position and the channel number of the monitored subscriber specified by the command as parameters.

The DLCC 15 sends a "channel interrupt request message" from the CPR 25 in which the monitored subscriber is accommodated.
Is received, the switch is turned down so that the contents of the designated channel are output to the specific time slots DTS1 and DTS2 of the LC-NW 16 by the connections shown in FIGS. 4A and 5 and a "channel interrupt response message" is notified to the CPR 25. .

Thus, a bidirectional connection of the time slots DTS1-LTS1-CTS1 and the time slots DTS2-LTS2-CTS2 is realized via the connection between the stations.

When the CPR 25 accommodating the monitored subscriber receives the "channel interrupt request message", it knows that the contents of the D-channel uplink and downlink are sent to the monitor device 28. It is transferred to the CMOC as a response signal (autonomous message) and is notified to the maintenance person.

When a B-channel monitor connection is realized in the absence of a call as described above, and then an outgoing call or an incoming call is made to the monitored subscriber, the LPR 21 sets the monitored B channel to the call. Control to assign.

The above example is a case where the channel content extraction in the DLCC 15 is due to a connection change using a relay.
This will drop the channel contents without breaking the connection
, The connection may be a one-way connection.

As described above, the contents of the channel designated by the monitored subscriber are output to the uplink and downlink time slots DTS1 and DTS2 by the DLCC 15, and the empty time slots LTS1 and LTS1 are provided by the time slot LC-NW16.
It is bidirectionally connected to the LTS 2, and a time slot CT corresponding to the accommodation position of the monitor device 28 by the CPR-NW 24.
Since they are connected to S1 and CTS2 and stored and monitored in the monitor device 28 via CMOC, the D channel and B channel of the basic interface can be monitored without stopping the switching service.

Moreover, since this monitor can be operated from the CMOC, unmanned maintenance work for each ISDN exchange can be realized. Embodiment 2 FIG.
FIG. 10 is a configuration diagram of a multiple access by the LC-NW according to the second embodiment of the present invention.

In this embodiment, monitoring of the B channel of the basic interface subscriber, the primary rate interface 19
Monitoring of the D and B channels of the current subscriber. FIG. 9 shows the connection when monitoring the D channel of the subscriber of the primary rate interface, and FIG. 10 shows the connection when monitoring the B channel of the subscriber of the basic / primary rate interface.

First, the maintenance person inputs a command specifying the following parameters from the CMOC. The station number of the station where the monitored subscriber is accommodated The subscriber accommodation position (telephone number) of the monitored subscriber
The channel number is monitored by the CMOC by analyzing the station number and transmitting the command as a character string to the exchange accommodating the monitored subscriber, and the command is analyzed by the exchange. (CMO
The command format sent from C to the exchange accommodated by the monitored subscriber is shaped so as to be the same as the format when input from the exchange accommodated by the monitored subscriber. Next, a connection is made between the CMOC and the exchange in which the monitored subscriber is accommodated.
Means for using a dedicated line designated by inputting a command in advance, and a switching station for accommodating the monitored subscriber to generate a pseudo call to establish connection between the stations to accommodate the monitored subscriber. There is a means for connecting the monitored subscriber and the network in which the monitored subscriber is accommodated under the control of the CPR 25.

CPR 25 in which the monitored subscriber is accommodated
Is the empty time slot L between CPR 25 and LPR 21
Hunt TS1 and LTS2, and send to LPR21 time slots LTS1 and LTS2 and an LC-NW multiple access request message using the subscriber position and channel number of the monitored subscriber as parameters.

The operation processor 107 of the CMOC
From the specified position of the monitor device specified by the command
The corresponding two time slots CTS1 and CTS of the accommodating switch device of the operation processor 107 of the CMOC.
2 is calculated and time slots LTS1 and CTS2, LTS2 and CTS are used as shown in FIG. 11 by using a dedicated line or the like for connecting the CMOC and the exchange to which the monitored subscriber is accommodated.
2 are connected unidirectionally.

In FIG. 11, the contents A and B of the time slots LTS1 and LTS2 coming from the LC-NW 16 are written in the primary time switch memory 90a. The time switch memory 90a is a random write and a sequential read, and the write timing is designated by the control memory 90b. This primary time switch memory 9
Each time slot read from 0a is written to the secondary time switch memory 91a. The secondary time switch memory 91a is a sequential write or a random read, and the read timing is designated by the control memory 91b, whereby the contents of the time slots CTS1 and CTS2 transmitted to the MLME 27 are A and B, respectively.

When the LPR 21 receives the LC-NW multiple access request message from the CPR 25, the LPR 21 determines connection target time slots DTS1 and DTS2 as follows.

When monitoring the D channel, the time slot from DT20 corresponding to the D channel to be monitored is set to DTS1, and the D channel to be monitored is set to SGC22.
Is set to DTS2.

When monitoring the B channel, if there is a call, the time slot from DT20 corresponding to the B channel to be monitored is set to DTS1, and the CP used by the call is set to DTS1.
The time slot between R25 and LPR16 is DTS2.

When monitoring the B channel, if there is no call, the time slot from DT20 corresponding to the B channel to be monitored is set to DTS1, CPR25 and LPR2.
An appropriate free time slot between 1 is DTS2.

Thereafter, the LPR 21 controls the LC-NW 16 to control the time slots DTS1 and DT1 as shown in FIG.
S2 is bidirectionally connected, and time slots DTS1 to LT
One-way connection to S1, DTS2 and LTS2, LC-NW
The connection response message is returned to the CPR 25.

In FIG. 12, the incoming time slot DTS
The contents A and B of DTS1 and DTS2 are written in the time switch memory 95. The time switch memory 95 is a sequential write or a random read. The read timing is designated by the control memory 96, and the time slot DTS1, DTS2, LTS to be transmitted is thereby specified.
1 and LTS2 are B, A, A, and B, respectively.

When the CPR 25 receives the LC-NW multiple access response message from the LPR 21, it knows that the contents of the uplink and downlink of the designated channel are sent to the monitor device 28, and outputs that fact as an autonomous message. The transfer to the CMOC notifies the maintenance person via the monitor device 28.

When the connection of the B channel is realized without a call, and then the outgoing call or the incoming call is made to the monitored subscriber, the LPR 21 uses the connection configuration shown in FIG. Of the B channel and the time slot DTS2.

Thus, the time slot D corresponding to the channel specified by the monitored subscriber is
TS1 and the time slot DTS to which it is normally connected
2 are connected to vacant time slots LTS1 and LTS2, and DIL1 of CMOC via CPR-NW24.
At 06, time slots CTS1 and CTS2 corresponding to the accommodation position of the monitor device 28 are connected and accumulated and monitored in the monitor device 28. Therefore, the D channel and the B channel of the basic interface and the primary rate interface are maintained without stopping the exchange service. Channels can be monitored.

According to the ISDN subscriber line channel centralized monitoring system described above, an arbitrary subscriber channel can be monitored by a simple operation without stopping the ISDN switching service, which is extremely advantageous in practical use. .

[0065]

According to the present invention, as described above,
It is possible to monitor an arbitrary subscriber line by operating from the centralized maintenance center without placing a maintenance person in the SDN exchange, which greatly contributes to labor saving.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of the method of the present invention.

FIG. 2 is a configuration diagram of a monitor device interfacer.

FIG. 3 is a configuration diagram of multiple access by DCLL.

FIG. 4 is a diagram showing a connection state of a DLCC;

FIG. 5 is a diagram showing a connection state of a DLCC;

FIG. 6 is a diagram showing a connection state of a CPR-NW.

FIG. 7 is a diagram showing a connection state of an LC-NW.

FIG. 8 is a signal sequence diagram of multiple access.

FIG. 9 is a principle diagram of a primary group interface D channel monitor by LC-NW.

FIG. 10 is a principle diagram of a basic / primary group interface B channel monitor using an LC-NW.

FIG. 11 is a diagram showing a connection state of a DLI.

FIG. 12 illustrates a connection state of an LC-NW.

[Explanation of symbols]

10, 171 to 17n terminal 11, 12 basic interface 13, 14 DLC (digital subscriber line circuit) 15 DLCC (digital subscriber line circuit signal control device) 16 LC-NW・ PBX 19 ・ ・ Primary group speed interface 20 ・ ・ DT (Digital terminal) 21 ・ ・ LPR (Concentrator processor)

Claims (4)

(57) [Claims] An exchange system comprising a plurality of ISDN exchanges (LS) connected to a centralized maintenance center (CM).
OC), and a monitoring device (28) is connected to the centralized maintenance center (CMOC).
C) Monitor to specify the monitored subscriber line channel from
A ISDN subscriber line channel centralized monitoring method, wherein a command is input and data in a monitored subscriber line channel designated by inputting the monitor command is sent to the monitor device (28). 2. A plurality of the monitoring devices (28) are connected to a centralized maintenance center (CMOC) and should be output when a monitor command for specifying a monitored subscriber line channel is input from the centralized maintenance center (CMOC). 2. The ISDN subscriber line according to claim 1, wherein a command for designating the monitor device (28) is input, and data in the designated monitored subscriber line channel is sent to the designated monitor device (28). Channel centralized monitor system. 3. The ISDN exchange (LS) uses a digital subscriber line signal controller (15) to set a time slot of a basic interface (11, 12) to a D channel and a B channel.
And multiplexing by separating the time slots of the B and D channels of the digital subscriber line signal controller (15) and the B and D channels of the primary rate interface (19). It is multiplexed by the switch device (16), and the time slot of the concentrator switch device (16) is connected to the ISDN (26) via the main processor accommodating switch device (24). When a command is input to the processor (107), the monitoring device interfacer (27) of the centralized maintenance center (CMOC) and the digital terminal (24) of the main processor accommodating switch device (24) accommodating the monitored subscriber. 1
01) and two time slots (CTS1, CTS1, CTS1) corresponding to the accommodation position of the digital terminal (101) in the main processor accommodation switch device (24).
CTS2) and the two hunted free time slots (L
TS1 and LTS2), and the concentrator switch device (16) uses the hunted two time slots (LTS1 and LTS2) and the downstream subscriber corresponding to the monitored subscriber accommodation position and the designated channel. The time slot (DTS1, DTS2) is bidirectionally connected, and the digital subscriber line signal control device (15) divides the contents of the specified channel of the monitored subscriber into the up and down time slots with respect to the ISDN (26). 2. The ISDN according to claim 1, wherein a connection is made to an up and down time slot (DTS1, DTS2) corresponding to the monitored subscriber accommodating position and a designated channel.
Centralized subscriber line channel monitoring method. 4. The ISDN exchange (LS) sets the time throttle of the basic interface (11, 12) to the D channel and the B channel by the digital subscriber line signal controller (15).
And multiplexing by separating the time slots of the B and D channels of the digital subscriber line signal controller (15) and the B and D channels of the primary rate interface (19). It is multiplexed by the switch device (16), and the time slots of the concentrator switch device (16) are multiplexed by the main processor accommodating switch device (24) and connected to the ISDN (26). Operation processor (10
When the command is input to 7), the monitoring device interfacer (2) of the central maintenance center (CMOC) is used.
7) and the digital terminal (101) of the main processor accommodating switch device (24) accommodating the monitored subscriber.
The main processor accommodating switch device (24) performs two time slots (CTS1, CTS2) corresponding to the accommodation position of the monitor device (28), and hunted empty time slots (LTS1, LTS2). The time slot (DTS) corresponding to the subscriber accommodation position and the designated channel is connected by the concentrator switch device (16).
1) and a time slot (DTS2) for supplying the specified channel to the ISDN (26) or the signal control device (22) of the concentrator switch device (16). 2. The ISDN subscriber channel monitoring system according to claim 1 , wherein the connection is made to each of the two available time slots (LTS1, LTS2).