JP2766039B2 - Monitoring test method for remote subscriber accommodation system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring and testing method for a remote subscriber accommodation system in which a subscriber circuit of a digital exchange is installed at a remote location using a digital transmission device.

[Conventional technology]

The conventional maintenance test method for subscribers including digital exchange telephones and subscriber lines is described in NTT R & D Report No. 3
As described in Vol. 1 No. 11 (1982), pp. 2017 to 2029, there are three broad categories. (1) a speech path test for confirming the normality of the switching function operation, and (2) a subscriber circuit test for confirming the normality of the subscriber circuit.
(3) A subscriber line test for confirming the normality of the telephone and the subscriber line.

The above three tests all include a test with an electrically DC component, and the test circuit must be installed close to the subscriber line receiving end. The above-mentioned literature discusses the above three test means for both the case where a subscriber line is directly accommodated in an exchange and the case where a subscriber circuit and a part of a network are extended to a remote place to accommodate a subscriber remotely. But,
In case of remote accommodation, 3
The test circuit of the item is controlled.

In recent years, the price of digital transmission lines has been reduced by optical cables, etc.
A remote subscriber accommodating system in which only a subscriber circuit is provided without having a switching function and a relay between the subscriber and the exchange through an inexpensive digital transmission line is effective. In this case, since there is no exchange function on the remote side, no control device is required, but means for controlling the above three test circuits is required. In addition, since the remote accommodation ground is a multiway route and the number of accommodated subscribers is small, the control means of the test circuit is required to provide the remote area with inexpensive equipment.

[Problems to be solved by the invention]

In the above prior art, even in the case of remote accommodation of subscribers, the test circuit of the above three items is controlled by a control device installed in a remote place. There is a problem that cannot meet the demand for a cheap and inexpensive facility.

An object of the present invention is to realize a low-cost control means for a subscriber-system test circuit of a remote subscriber accommodation system in the above-mentioned subscriber circuit extension system, and furthermore, to realize a remote-state apparatus state monitoring and control means to realize reliable control. It is an object of the present invention to provide a monitoring test method for a remote subscriber accommodation system which can improve the operability.

[Means for solving the problem]

In order to achieve the above object, a monitoring test method for a remote subscriber accommodation system according to the present invention is provided by installing a monitoring test circuit for various tests and alarm monitoring at a remote location side and installing a monitoring test control device at an exchange side. In the meantime, a test call and monitoring test data are transmitted / received using the monitoring test time slot allocated to the digital transmission device, and the monitoring test control device on the remote side is remotely controlled from the monitoring test control device on the exchange side. Things.

Further, a multiplex frame configuration separating circuit is provided at a remote place and on the exchange side, and the monitoring test time slot has a multiplex frame configuration.

Further, a time-division switch is provided in the monitoring test control device on the exchange side to enable a centralized monitoring test of a large number of remote accommodation systems.

[Action]

The above-mentioned monitoring test method for the remote subscriber accommodation system is based on a digital circuit in which voice and control input / output data of a subscriber circuit and a subscriber line test for a telephone at a remote location and a test circuit for a telephone line / subscriber circuit and an alarm monitoring circuit are digitally transmitted. Data can be transmitted to and from the exchange by the synchronous multiplexing conversion circuit of the transmission device.
It can be connected to the subscriber circuit test system and the centralized maintenance system, and the control / monitoring point of the remote monitoring test circuit is accommodated in the monitoring test time slot allocated to the synchronous multiplex conversion circuit. By setting various data patterns in the corresponding time slot, the monitoring test circuit in the remote place can be operated as the corresponding circuit, and the control result can be read as a change in the data pattern in the corresponding time slot.

In addition, the multiplexed frame configuration / separation circuit provided to the monitoring test circuit and the data transmission / reception circuit of the monitoring test control device can accommodate a large number of control / monitoring points in the same monitoring test time slot.

Further, by using a time-division switch provided in the monitoring test control device, by connecting to a test system that requires a test call voice and a monitoring test control time slot of a monitoring test circuit installed in a plurality of remote locations, Centralized monitoring test control of many remote accommodation systems becomes possible.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a system configuration diagram showing one embodiment of a monitoring test method for a remote subscriber accommodation system according to the present invention. First
In the figure, a remote facility of a remote system includes a subscriber circuit 2 installed for a remote accommodation telephone 1, a monitoring test circuit 3 for various tests and alarm monitoring, and a subscriber circuit 2 and a monitoring test circuit 3. A synchronous multiplex conversion circuit 4 for transmitting voice and control input / output data to and from the digital exchange. On the exchange side of the exchange system, a synchronous multiplex conversion circuit 5 facing the remote place and a monitoring test control device 6
Which are connected to a digital exchange 7, a subscriber line test system 8, and a centralized maintenance system 9, respectively.
It is connected to a monitoring test system 10 for performing a channel test via a digital exchange 7.

The control points and the monitoring points of the remote monitoring test circuit 3 are accommodated in the monitoring test time slots allocated to the synchronous multiplex conversion circuits 4 and 5, and the monitoring test control device 6 on the exchange side sends various times to the corresponding time slots. By setting the data pattern of (1), it is possible to operate the circuit corresponding to the set data pattern by setting the monitoring test circuit 3 at the remote place.
The control result can be read by detecting a change in the data pattern of the corresponding time slot. Further, by providing a multiplex frame configuration / separation circuit to the monitoring test circuit 3 and the data transmission / reception circuit of the monitoring test control device 6, a large number of control points and monitoring points can be accommodated in the same monitoring test time slot. Further, a time-division switch is provided in the monitoring test control device 6, and a subscriber line test that requires a test communication voice time slot and a monitoring test control time slot of the monitoring test circuit 3 installed in a plurality of remote locations as needed. By switching the connection to the system 8 and the monitoring test system 10, a large number of remote subscriber accommodation systems can be centrally monitored and controlled.

With this configuration, the line test request of the remote telephone 1 from the subscriber line test system 8 is received by the monitoring test controller 6 and relayed to the digital exchange 7. Then, upon receiving the designation of the monitoring test circuit 3 of the telephone under test 1 from the digital exchange 7, the line test speech time slot of the corresponding synchronous multiplex conversion circuit 5 is connected to the subscriber line test system 8 by an internal time division switch. At the same time, the monitoring test circuit control time slot is connected to the internal multiplex frame data transmission / reception circuit. Next, the subscriber's circuit 2 of the remote telephone 1 is controlled by the digital exchange 7 and connected to the monitoring test circuit 3. Thereafter, in accordance with the test instruction from the subscriber line test system 8, the supervisory test controller 6 sends the corresponding multiplexed frame data pattern to the supervisory test circuit control time slot to control the supervisory test circuit 3, and the control result Is similarly detected, read and returned to the subscriber line test system 8.

In the speech path test and the subscriber's circuit test from the monitoring test system 10, similarly, the speech time slot for the speech path test or the subscriber's circuit test of the synchronous multiplex conversion circuit 5 is connected via the digital exchange 7. The monitoring test circuit control time slot is connected, and thereafter, the monitoring control circuit 3 is similarly controlled, and the control result is returned to the monitoring test system 10 via the digital exchange 7.
Further, alarm monitoring information such as a fuse blown or a temperature alarm of the remote system is fetched by the monitoring test circuit 3 and transferred to the monitoring test control device 6 via the synchronous multiplex converters 4 and 5 by the alarm monitoring time slot. The monitoring test control device 6 constantly monitors this data and transmits alarm data to the maintenance centralized system 9. Also in the transfer of the alarm monitoring information, a plurality of monitoring points and control points can be accommodated in the same time slot by the multiplex frame configuration / separation circuit.

FIG. 2 shows the monitoring test circuit 3 and the synchronous multiplex conversion circuit of FIG.
FIG. 6 is an explanatory diagram showing an example of a multiplex frame configuration in the same time slot as assignment of a monitoring test voice and a monitoring test circuit control data time slot to a digital transmission line in the monitoring test controller 4 and 5; In FIG. 2, 32 channels of telephone voice (8 bits × 8 KHz) can be transmitted with a 2.048 Mb / s serial highway interface (hereinafter abbreviated as 2 MHW) of a commonly used exchange and transmission line. One voice slot for the audio channel (below)
TS). In the example of Figure 2 employs a first monitoring test circuit 3 per 7TS, V ₀ of TS2 is the audio line test _{TS, V 1, V 2,} V 3 of TS4,5,6 the speech path test and Voice TS for subscriber circuit test. S ₀ of TS1 is the line testing with a speech path test is a subscriber circuit test with integrated monitoring test control TS, and multiplexing frame structure of 64 frames for multiplexing of the control points and monitoring points. One frame is composed of the seventh frame synchronization bit and the sixth to sixth bits.
It is composed of a data bit and a 0th bit horizontal parity bit. Therefore, if all data bits are individually used, 384 control points and monitoring points can be accommodated.
In this case, the data transfer rate per point is 125b / s.
Control and monitoring are performed at 8 ms intervals, but the speed is sufficient for normal test control and monitoring. Further, when the speed is insufficient in a dial pulse monitoring test or the like, if the same monitoring point is accommodated in different 8 bits, monitoring control can be performed at 1 ms intervals. S ₁ of TS3 is TS for alarm monitoring, it is likewise 64 multiplex frame configuration and S _0.

FIG. 3 is an example of a functional configuration of the remote location system of FIG. In FIG. 3, the remote telephone 1 is connected to the corresponding subscriber's circuit 2, and is accommodated in the digital exchange 7 via the transmission line by the synchronous multiplex conversion circuit 42 via the interface circuit 41. Normal outgoing and incoming calls and their control are performed on this route. The subscriber circuit 2 has a built-in switch for connecting the telephone 1 side and exchange side interface circuit 41 of the subscriber circuit 2 to the monitoring test circuit 3 via the LT line 21 and the NT line 22, respectively. Controlled from. LT line 21 and NT line
Reference numerals 22 are duplicated in appropriate units (for example, LT lines for every 128 subscriber circuits, NT lines for every 1024 subscriber circuits), and are accommodated in the test switch 31. On the output side of the test switch 31, a subscriber line test circuit 33 of the monitoring test circuit 3, a communication path test circuit 34, and a subscriber circuit test circuit 35 are accommodated, and the test switch 31 is connected to each test. By controlling, the connection is made to the subscriber circuit 2 via the LT line 21 and the NT line.

These test circuits 33, 34, including this test switch 31,
35 control points and monitoring points are multi-frame data conversion circuits
The data is transferred to a transmission line facing the exchange 7 by a synchronous multiplex conversion circuit 42 via a 2MHW interface circuit (HWIF) 37. In addition, alarm information such as blown fuses and temperature alarms in the remote location system and thermometer measurement control are converted into logic level signals by the remote location device status alarm monitoring circuit 32, and the multiplex frame data conversion circuit 36 controls other control points and the like. Similarly to the monitoring point data, the data is transferred to the exchange 7 opposite transmission line. Control points and monitoring point for these test circuits 33 to 35 points required in the subscriber circuit test circuit 35 and the speech path test circuit 34 and the line testing circuit 33 to S ₀ of the monitoring test control TS1 of 2MHW of FIG. 2 They are allocated according to the numbers as shown in the example shown. The alarm control and monitoring points required for monitoring circuit 32 are housed in the same 64 multiplex frame structure as S ₀ to S ₁ of alarm monitoring TS3.

FIG. 4 is a diagram showing an example of the functional configuration of the monitoring and testing device 6 on the exchange side in FIG. In FIG. 4, the subscriber line test system 8
Is requested by activating a test-in trunk (LTICT) 606 through a test telephone line.
The activation of the LTICT 606 is detected by the processing unit (MPU) 610, and the line test line interface circuit (LTTAU) 605 of the digital exchange 7 is selected. Then, under control of the MPU 610, the LTICT 606 and the LTTAU 605 switch the time division switch (TDSW) 60
The TDSW 603 is connected by voice through the switch controller (SWC) 607 from the MPU 610. Next, the telephone number of the remote telephone 1 to be tested is transmitted from the subscriber test system 8 as a combination of in-band signals and received by the digital exchange 7. The digital exchange 7 instructs the MPU 610 via the communication path bus interface (SPBIF) 609 of the remote system number accommodating the telephone 1. MPU610
Is a 2MHW housing a TS for monitoring test of the remote system
Connect V ₀ which second view of line testing for voice TS2 of the interface circuit (HWIF) 601 as well as connect to LTICT606, the S ₀ of the monitoring test control TS1 to multiplex frame data transmission and reception circuit (HWS / R) 604 I do.

Next, various test instructions from the subscriber line test system 8 are sent to the line test system interface circuit (LTSIF) 616.
And received by the MPU 610. The MPU 610 sets the data pattern corresponding to this test instruction in HWS / R604,
The multiplex frame data pattern is sent to the S ₀ of the monitoring test control TS1 from HWS / R604. As a result, the line test circuit 33 of the remote system is set as instructed by the subscriber line test system 8 and the test is performed. The test result is received by the HWS / R 604 as a change in the multiplex frame data pattern of the monitoring test control TS, and is taken into the MPU 610. MPU6
10 analyzes and judges this data, and as a test result, LTSIF
It is returned to the subscriber line test system 8 via.

Also, the test of the communication path and the subscriber's circuit from the monitoring test system 10 is almost the same as that of the above-mentioned subscriber's line test. Performed by SPBIF609. Also, the controlled remote test circuits are the speech path test circuit 34 and the subscriber circuit test circuit 35, so that the HW
The data points transmitted and received by the S / R 604 are different from those for the subscriber line test. Voice TS for speech path test or subscriber circuit test required for testing from this monitoring test system 10.
V ₁ ~V ₃ 4-6 is connected to the digital switch 7 remains in digital form by 64K interface circuit (64KIF) 611 via TDSW603.

The S ₁ alarm monitoring TS3 to forward alarm and monitoring information of the alarm monitoring circuit 32 of the remote system is constantly connected to the HWS / R604 by a fixed path TDSW603, alarm are constantly monitored, alarm The occurrence is detected by the HWS / R604 and taken into the MPU 610. The MPU610 integrates all remote system alarms and provides an alarm forwarding interface circuit (SVEIF) 6
08 is transferred to the centralized maintenance system 9. The control instruction from the centralized maintenance system 9 is taken into the MPU 610 via the SVEIF 608, and the data is set in the corresponding HWS / R 604, whereby the alarm monitoring circuit 32 on the remote side is controlled.

〔The invention's effect〕

According to the present invention, in the digital remote subscriber system, remote control can be performed from the exchange side without placing a control device of the monitoring test circuit on the remote side, so that the remote side facilities can be reduced.

In addition, by making the data transfer of the control point and the monitoring point of the monitoring test circuit into a multiplexed frame in the same time slot, the number of transmission channels for the monitoring test between the remote location and the exchange can be minimized. Effective utilization becomes possible.

In addition, by installing a time-division switch on the switch side monitoring test control device, centralized monitoring and monitoring of many remote systems is possible.
Since the test is controlled, there is an effect that an economical monitoring test system can be constructed.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a monitoring test method for a remote subscriber accommodation system according to the present invention, and FIG.
FIG. 3 is an explanatory diagram of an example of a configuration of a TS for monitoring test and data TS for control of a monitoring test circuit on a digital transmission line and a configuration example of a multiplex frame in the same TS. FIG. FIG. 4 is a diagram showing an example of the functional configuration of the monitoring and testing device on the exchange side shown in FIG. 1 ... Telephone accommodated at a remote location, 2 ... Subscriber circuit corresponding to a remote telephone, 3 ... Monitoring test circuit, 4, 5 ... Synchronous multiplex conversion circuit, 6 ...
… Monitoring test controller, 7… Digital exchange, 8… Subscriber line test system, 9… Centralized maintenance system, 10… Monitoring test system, 32… Alarm monitoring circuit, 33 …… Subscriber line test circuit , 34 ………………………………………………………………………………………… …………………………………………………………………………………………………….

Continued on the front page (72) Inventor Nakayabu, etc. 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Totsuka Plant of Hitachi, Ltd. (72) Inventor Masaaki Takenaka 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Inside (72) Inventor Osamu Hanasaki 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Kohei Uchida 1-7-112 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. In-company (72) Inventor Kazumasa Manabe 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (56) References JP-A-1-264351 (JP, A) JP-A-63-51759 ( JP, A) (58) Fields surveyed (Int. Cl. ⁶ , DB name) H04M 3/08-3/14 H04M 3/22-3/36 H04Q 1/20-1/26

Claims (1)

(57) [Claims] 1. A subscriber circuit (2) installed corresponding to a remote accommodation telephone (1), a monitoring test circuit (3) connected to the subscriber circuit, and voices of the subscriber circuit and the monitoring test circuit. A remote multiplex system including a synchronous multiplex conversion circuit (4) for transmitting control input / output data to and from a digital exchange, a synchronous multiplex conversion circuit (5) opposed to a remote location, and the digital exchange (7). A subscriber line test system (8) for making a line test request of the remote telephone, the multiplex conversion circuit, the digital exchange, a monitoring test controller (6) connected to the subscriber line test system, and the digital exchange, respectively An exchange system including a centralized maintenance system (10) connected to the monitoring test control device and a monitoring test system (9) connected to the digital exchange, respectively; A subscriber line (2) of the digital exchange and the monitoring test circuit are installed in the remote system, and voice and control data of the subscriber circuit and the monitoring test circuit are provided. What is claimed is: 1. A system for digitally transmitting data to said digital exchange using a digital transmission device, wherein control point and monitor point data of said monitoring test circuit are monitored for a multiplex frame configuration assigned to said synchronous multiplex conversion circuits (4) and (5). A test time slot, a data pattern is set in the time slot from the monitoring test control device, the time slot has a multiplex frame configuration, and the monitoring test circuit is a subscriber line test circuit (33); A communication path test circuit (34) and a subscriber circuit test circuit (35) are accommodated, and each of the subscriber circuit and each of the test circuits is accommodated. A test switch (31) controlled in accordance with a test, a multiplex frame conversion circuit (36) containing control point and monitoring point data of the test circuit, and the control point and monitoring point data are transmitted through the synchronous multiplex conversion circuit. An interface circuit (37) for transferring the data to the transmission line by the tester. The monitoring test controller includes a line test line interface circuit (605) of the digital exchange and a test input trunk (606) activated by the test request. A time division switch (603) for voice connection between the interface circuit and the test input trunk; and a control circuit (610) for controlling the time division switch first, and receiving the line test request and relaying the received line test request to the digital exchange. In addition, receiving a designation of the monitoring test circuit (3) of the telephone under test from the digital exchange, and receiving a voice tie for a line test call of the multiplex conversion circuit (5). A slot is connected to the subscriber test system, and a test call and monitoring are performed between the respective circuits of the supervisory test circuit of the remote system and the supervisory test controller of the switching center system using the supervisory test time slot. A monitoring test method for a remote subscriber accommodating system, wherein test data is transmitted and received, and each circuit of the monitoring test circuit of the remote location system can be subjected to a remote control test from the monitoring test control device.