JPS59500595A - Method for identifying faulty communication lines - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Method and apparatus for faulty communication line identification Technical field The present invention provides a method and apparatus for identifying failed communication lines in a communication network. , especially a method and apparatus for identifying faults in inter-node communication lines in communication networks. In recent years, there has been increased interest in automating the detection of failures in communication networks. ing. Much of the interest is in each node used by all communications passing through the node. This relates to common circuits in to interconnect the nodes of a network Failure analysis of multiple functional circuits used is generally considered less important than common circuits. Considered and less developed. Unlike most of the common circuits, these Roads cannot often be monitored continuously in an efficient and cost-effective manner.

In communication systems, the functional circuits that interconnect the nodes of the network are A shared network used by different customers of a network at different times. It is equipped with facilities for Trunks that interconnect any two nodes are typically They are organized into trunk groups of various sizes. different nodes of the network interconnect these nodes when setting up communication between customers related to An available trunk from the group is selected for connection.

In some cases, adjacent conditions such as loud noises occur on the trunk, and such The condition cannot be detected by routine operational testing, but is detectable by the customer. Ru.

When such a trunk is used for a call, the customer who was using the connection may not be able to accept it. the call is terminated after a short period of time, and an attempt is made to set up the call again. I will do it. Such trunks are only used for a short time with each connection attempt. is not used, has a very short hold time, and is not available repeatedly for customer use. This may cause an abnormally large number of incomplete calls. to the phone system In Japan, these are called ``killer trunks''. This is because each of these causes an abnormally large number of incomplete calls.

For example, in a dedicated network dedicated to one large customer such as a company or government office, The need to quickly locate failed trunks is particularly high. Such a network There are usually a relatively small number of heavily loaded trunks in a group. This way For these reasons, individuals using such networks must It often happens that the same failed trunk is used multiple times. Customer is disconnected Even if you complain about the problem, the complaint and the specific trunk or trunk that caused it. It is often difficult to find associations with trunk groups.

Generally, all or many of the trunks in a group share some common circuitry. There is. All of the group's trunks have nodes connected in common. like this When there is a failure in a common circuit or connected nodes, many trunks A large number of distributed calls will not be successful. These types of fault conditions can be handled on a single transistor. Distinguishing this from individual circuit failures is important considering that the repair methods are different. This is very important.

Records the circuit (number of trials) on which a given trunk was captured, and the given trunk An option that records the percentage of time (utilization or occupancy) that the Frying equipment is commercially available. These records show abnormal hold times (utilization and You can know the short trunks (ratio of number of trials) and this indicates failed trunks It turns out.

However, each trunk to be monitored requires special equipment, so These prior art systems typically can only measure a small number of trunks. It's starting to look ugly. The cost of monitoring all trunks with such equipment is is prohibited. Know which trunks or trunk groups to measure. There is no good overall mechanism to differentiate. several times for meaningful measurements. It is not possible to use such a dedicated system because it is necessary to measure the busiest time of It may take several weeks or more to measure the performance of all trunks connected to a node. It will take several months.

Additionally, such prior art systems do not provide direct circuit access to each trunk. Wear. Digital trunks and analog transport trunks cannot be used. For multiplexed trunks such as You cannot use it unless you are able to do so.

Summary of the invention According to the invention, the nodes of a network are controlled and the nodes of such a network are A program control system with a group of functional circuits used for communication between detects unacknowledged communications in each of these groups. each glue The number of unacknowledged communications of the functional circuit of the group is measured. Communication not acknowledged A group whose quantity is essentially larger than that of a group of similar size is an incomplete node. This group is thought to include functional circuits that have been repeatedly used for inter-board communication. . In one embodiment, this number is measured for a given time unit and to represent the incidence of such unacknowledged communications for such time units. Ru.

In one embodiment, such number is associated with each such group of functional circuits. can be accumulated in a counter in associated storage. Advantageously, let's The number can be displayed on the system's maintenance console and repeated for incomplete calls. This indicates the group of functional circuits used.

Advantageously, a group was repeatedly used for communications that were not acknowledged. Once identified, the usage of that group is further determined by the function times of each of the groups. The number of trials per unit time for the road is further monitored.

Functional circuits that have a higher number of trials than other members in the group may be faulty. It is said to be a highly functional circuit. After the problematic circuit is identified this way can perform routine repairs.

Furthermore, according to the present invention, threshold values can be set for each group of functional circuits. can be done. Affirms that the group exceeds this threshold during a unit of time If there are any connections that are not configured, this group will also automatically The traffic will be measured on a regular basis.

Furthermore, according to the invention, there are three types of individual functional circuits within a group. The total number of attempts at which traffic measurements are made, the number of unacknowledged communications, and the It has a high rate of occurrence. These counts and occupancy rates are simple for all functional circuits in the group. It is rented out for about an hour. The total number of trials for any one functional circuit is the group There are essentially more of them than others in the group, or there is a lack of affirmation in one functional circuit. The number of communications received is inherently higher than that of others in the group, or or other functions in the group whose occupancy of one function circuit has a similar number of trials. If the occupancy rate is substantially lower than that of the circuit, the functional circuit is faulty. It is advantageous to determine that the According to another advantage of the invention, individual functional circuits If measurements of the group show relatively uniform poor results, then There is a high possibility that the device is malfunctioning.

An example of the type of program control system to which the present invention can be applied is a communication system. It is Tem. A network of such systems is a communication network. of The inter-board communication circuit is a trunk. - In the example scheme, the communication network Unacknowledged attempts and total attempts are counted for each group of outgoing trunks.

The number of unsuccessful trials is a predetermined threshold for that group. measurements on individual trunks for trunks in that group. will be held. The number of attempts to use each trunk in the group is Options for occupancy and unacknowledged communications for each trunk in the group. It may also be combined with the measurement of tion. High attempt rate, high rate of unacknowledged communications Trunks with low utilization compared to other trunks with a similar number of attempts may fail. It is advantageous to identify those who do. Furthermore, the measurement result of the trunk in the group is If the results show relatively uniform bad results, there may be a failure in the group's common equipment. This means that it has a high level of sexuality. related to specific devices shared by a subgroup. If a subgroup of trunks that have been configured show uniformly poor results, then There is a high possibility that there is a malfunction. If a single node is reached from many different nodes, Measurements on groups of trunks show a high percentage of trials that are not positive for all. If this occurs, there is a possibility that a failure exists in that node.

The rate of unacknowledged calls is due to failures in the internodal equipment of the communication network. It is a sensitive display means.

The present invention takes advantage of this property to identify specific problems.

Brief description of the drawing The present invention will be fully understood from the following description with reference to the drawings. Ru.

Figure 1 shows the main parts of a typical switching system used in a communications network. Block diagram; Figure 2 is a diagram of a communication network with several nodes: FIG. 3 shows a well-known method for processing telephone calls in a typical electronic telephone switching system. Program structure; Figure 4 shows the number of trials for each trunk in a trunk group. , memory arrangement for accumulating unanswered calls and usage counts: Figure 5 is used to accumulate attempt count and unanswered call data for trunk groups. Memory arrangement of counters used; Figure 6 shows the memory arrangement of data identifying the trunk group being monitored; FIG. 7 is a flowchart representing a program for accumulating the number of unanswered calls; Figure 8 shows a program that accumulates the number of attempts for each trunk in a trunk group. Flowchart of the program; Figure 9 shows the usage of trunks in one trunk group. Flowchart of the program used to measure utilization: Figure 10 shows a trunk group to identify all trunks in the group. Memory devices; Figure 11 shows data useful in identifying potentially failed trunks. Program flowchart for configuring traffic data to print data Figure 12 identifies the trunk group whose individual trunks are to be monitored. Flowchart of the program; Figure 13 shows the command to monitor a specific group. 1 is a flowchart of a program that responds to

Detailed explanation FIG. 1 is a high level block diagram of such a telephone switch. This is a telephone network 1 shows one switch or node 106 in the network. system is program control processor 100 and input/output devices 130, 104 and 105; There is.

1. Rank and service circuits 103 are connected to trunks 115 connected to other exchanges. including trunk circuits associated with.

The service circuit is a transmitter circuit that sends the called number to another switch. and a dial receiving circuit for receiving information. This exchanger handles for connecting between customer line 114 and trunk and service circuit 103. In order to A network is used. Connection to trunk circuit 103 set to appropriate state A connection to the associated trunk queue 15 is formed by the connection. trunk and service Circuit 1o3. switching network 104 and the lines and consortiums connected thereto; The processor t100 controls the processor 105 via a bus 116.

When the customer picks up the phone, the line is connected to 103 by switched network 104. connected to the dial receiver inside. The processor indicates the request dialed by the customer. data via the dial receiver. If this request is made by another If the process is interpreted as requesting a connection to a customer treated as The switch selects trunk circuits associated with trunks connected to other switches. Next A transmitting circuit in 103 is selected by the processor to send to switching network 10. 4, the selected trunk circuit is connected. The calling number is determined by the transmitting circuit. Once sent, the calling customer is sent to the trunk selected by the switching network. connected to the circuit. The other exchange then makes the appropriate connections in its own exchange network. and the calling customer can communicate with the called customer when the phone goes off-hook. It becomes like this. Status of all switched network connections, trunk circuits, and service circuits The state change is performed under the control of processor 1000.

Replacement screw 1-work 104. l-rank circuit and dial receiver and transmitter circuit The service circuitry involved is well known to those skilled in the art.

Maintenance console 105 is for communication on personnel maintaining and controlling the exchange system. used for. Information about traffic and failure conditions is displayed on the maintenance console. commands are entered from here. The maintenance console is for those skilled in the art. It is well known.

Program control is used by processor 100 to control the switch. Many Any of the known processors can be used to perform this function. can. Such a processor consists of a central processing unit, = memory, 102. Ru. Memory 102 stores a group of instructions that can be directly interpreted by central processing unit 101. Memorize groups of programs containing loops. The central processing unit 101 is a memo It is possible to execute the following functions in response to instructions read from IJ = 102. Execute such a program by Receive input data from input/output device Send control and output signals to Memo! Read from J-102 Store data in internal registers. The contents of the memory 102 location are stored in an internal register. Add to the contents of.

The contents of the memo IJ-1, 02 are compared with the contents of the internal register storage. this Control is transferred to an alternative program according to the result or the state of internal registers.

Transfer control unconditionally to an alternative program. The central processing unit l-101 also has a clock 113. Clocks provide basic timing. This basic tie The processing is performed under the control of an execution control program stored in the memory 102. 102 can be used to derive an arbitrary time span in relation to the data stored in 102. I can do it.

FIG. 2 shows a portion of a telephone network in which the node 10 shown in FIG. 6 is one node, and nodes 107, 108 and 109 are node 106 and Other nodes that are essentially similar. These nodes are partially interconnected. Each node is connected to at least one other node. Communication between nodes Interoffice trunks used as communication facilities are grouped into trunk groups; All its members interconnect the two nodes. For example, trunk All members of loop 110 interconnect nodes 06 and 107, and All members of rank group 111 interconnect nodes 106 and 103. , all members of trunk group 112 interconnect nodes 106 and 109. Continue. Each node has a number of trunk groups connecting it to other nodes. ing.

The telephone system restricts traffic on a given trunk group to one direction. It is normal to For example, from a customer served by node 106, Traffic connected to a customer handled by node 107 (1 note lQ 6], through a trunk group such as 10. and then transferred.

The corresponding ingress trunk group (not shown) is configured to carry traffic in the reverse direction. It becomes. The normal practice in telephone switching systems is to connect the The inbound switch is now responsible for the maintenance of the trunk, and the incoming trunk is It is then maintained by the switch connected to the other end of the trunk. Ru.

Controls the switching system to perform all functions necessary to handle telephone calls Programs that can be executed by processor 100 to do this are well known to those skilled in the art. It is.

Figure 3 shows outgoing calls (from customer lines handled by that exchange to a different exchange). traffic measurement programs related to (calls to customer lines handled by) shows the program that performs the configuration and the program that communicates with the maintenance console. . This description refers to incoming calls (calls from customer lines that are handled by different exchanges). calls to customer lines handled by an exchange) are serviced by the other exchange. There is no need to explain incoming calls. For intra-office calls that do not use trunks I shall not think about it.

The principles of the invention described herein can also be applied to the case of bidirectional trunks. It is something that However, for convenience, the explanation will only be given for the case of one-way trunks. shall be.

The switch operates under the control of a prior art program illustrated schematically in FIG. central office The management device 101 is responsible for setting up and restoring telephone connections or for operating telephone exchanges. Run this program to perform other required functions.

The central processing unit 101 has a turnout capacity of 210, 21L, 213, 214 and 216, and communicates with the input/output devices 103, 104, and 105.

Accumulate the data necessary to discover specific details of a customer's dialed request; When processing, the central processing unit executes call control programs 201, 202, 20. 3.204, operates under the control of 205 and 206. Call control program and maintenance In the process of executing the console message program, the input/output device 103. 104.105, select appropriate lines and trunks, and configure system operation. The central processing unit frequently calls service routine 220 to make the necessary measurements regarding , 221.22'2 and 223 are executed. The program and rules shown in Figure 3 Each program contains a number of subprograms or subprograms that control specific subtasks. The Blue Ten is empty. Central processing unit 101 executes a jump instruction either unconditionally, according to the result of the comparison, or internally within the unit. Zabupu by detecting a specific state of a register and executing a jump instruction. Request execution of Lokram. Detection, control, and other operations of the program described here is understood to be executed by a processing unit under the control of a program. It will be.

The system under the control of the program outlined in Figure 3 operates as follows. . An outgoing call is initiated when the switch detects a customer off-footer. This detection A suite that periodically monitors the circuits of the switching network 104 connected to customer lines. It is executed under the control of the per-by-series line scanning program 210. processor detects a service request, it controls the network 104 to initiate and join The dial that sets up the connection between the user and the dial receiving circuit runs the connection program 201. Operate. By executing the program 201, the central processing unit also Translation program 2 used to select the dial receivers available at that time 212 Select a route through the switching network between the originating customer and the dial receiver. The status of the network control program 222 and dial receiver used for A circuit control program 22 used to set data necessary to control the Request execution of step 3.

When the customer dials, the dialed number is scanned by the dial pulse scanning program 2. 11 controls. Once the numbers have been collected, the customer request details and die Completion of the calculation is detected under the control of the numerical analysis program 202. this stage of the call Once the floor is reached, the translation program 221 is executed and the first part of the dialed number is A translation program that selects the trunk group of the switch specified by the first three digits. system 221 is executed to select an available outgoing trunk within the group. . a transmitter in 103 operative to transmit the called telephone customer's number to a distant switch; A network control program 222 is installed between the communication circuit and the previously selected outgoing trunk. A route passing through the network 104 is set under the control of the network 104 . Out trunk and The transmitter is set to the correct initial state under the control of the circuit control program 223. . The data that controls the transmission of the called number to the destination exchange is the pulse sending program. 103 under the control of the number sending program 214. The actual transmission of the digits is done by the transmitting circuit. Sends the called number to the other party's exchange. Once the process is complete, the connection between the calling customer and the previously selected outgoing trunk is It is set under the control of the network control program 222. circuit control program By controlling the data generated by 223, the outgoing trunk circuit of 103 is The calling customer and the called customer are set to the appropriate state such that a response by the calling customer is detected. Communication between customers will be possible.

The selected output is then selected under the control of the supervisory trunk scanning program 213. The status of the trunk circuit is monitored by central processing unit 101. to the called customer When a response is detected, the central processing unit executes the response detection program 204. , which controls the start of timing for billing purposes. response detected If the customer hangs up before the call, it may indicate an unanswered or unacknowledged call. , the central processing unit requests execution of the disconnection program 205, which is connected to the switched network. The selected route in the network 104 is recovered and the outgoing route in the selected network 103 is restored. make the link available again.

The central processing unit 101 operates under the control of an execution control program 203, and This clock was stored in memory in response to the clock from clock 113. Use in conjunction with time records to periodically drive other signals for proper programming. start running the system. This periodic signal is processed by the traffic recording program 220. This is one of the functions that is controlled. Periodic functions such as traffic occupancy measurements It becomes a means to start Noh. Periodically, the measured trunk usage is sampled. Utilization is sampled for an hour, for example, and the trunk is For example, it is sampled every 100 seconds. Utilization rate is sump due to trunk blockage expressed as the value obtained by dividing the number of files (number of times used) by 36, which is the number of samples per hour. Can be done.

Traffic recording program 220 also records the number of attempts in the trunk group. Also used to control accumulation. This number of times can be calculated using the numerical analysis program 202. A central processing unit under control of the Calling the translation program 221 to control loop and trunk selection Accumulated at the same time. After trunk groups and trunks are selected, the central processing unit traffic 101 increments a counter associated with the trunk group. jump to the appropriate subroutine in the recording program.

Finally, when sending a message to or from the maintenance console, When receiving tsage, keep it.

The controller console message program 216 is executed by the processor 100. This indicated the possibility of a malfunction.

When appropriate maintenance messages are sent to the console, the system to which they are sent is running efficiently. transport, detect failure conditions, and provide design documentation for trunk group expansion7 ``1. Extensive traffic measurements are typically performed in telephone systems. Hic measurements are performed under the control of a traffic recording program.

Figures 4 to 13 show how the present invention can be implemented in the exchange described in the baragraph above. It shows the flowchart of the program and the memory layout. included here Detection and counting of unanswered calls in trunk groups, individual trunk group Measure each member, notify the results to the maintenance console, and send the results from the maintenance console. There is control over trunk group monitoring. The flowchart is as described above with reference to Figure 3. is shown connected to a prior art program. Flowcha The chart outlines a program that controls the following operations: Unanswered call Number of rank groups and individual trunks of unanswered calls for such groups Accumulation for trunks (Figure 7): Accumulation of usage for each trunk in a group. Accumulation of number of attempts (Figure 8); usage of each trunk for a group Measurement (Figure 9) Unanswered call data of the Nidoranku group Individual of the Sahitto group Printing of traffic data for trunks to be monitored (Figure 11); Automatic selection of rank groups (Figure 12); Then, select a loop like this (Figure 13).

Figure 4 shows the cumulative number of times for each trunk in a trunk group to be monitored. It shows the memory allocation required for the numbers and measurements. Monitored trunk group measures how many times a group of trunks is accumulated in this way It is. Each word contains three counters, one for accumulating the number of call attempts. One is to accumulate the number of times the trunk was in use when it was sampled. One is to accumulate unanswered calls for that trunk. Ru. A block of memory has a capacity of n trunks, and the measurement of the first trunk is The first word is occupied, and the nth trunk measurement occupies the nth word. being watched When an event is detected in the moth trunk of the group The appropriate counter 14-1, 142 or 143 for the code is incremented.

For the convenience of this particular implementation, the switch does not store such blocks in memory. Only one lock 140 is used. The address of this block 140 is then The length of the block is fixed as a parameter of the stem, and the length of the block is may take some convenient maximum value, or Therefore, take the standard maximum value that represents the largest trunk group that will be handled. You can leave it as is. Also, set up several blocks like this and create some Trunk groups may be monitored simultaneously.

FIG. 5 shows the memory arrangement 119 of common variable data for trunk groups. It shows. This includes counting the number of attempts to use the trunk in the group. Memory for counting 129. Memory 128 for counting the number of unanswered calls in a group A memory 127 holds a threshold representing the normal maximum number of unanswered calls in a group.

Figure 6 shows the trunk group number 139 being monitored and the group being protected. A storage arrangement for storing a flag 138 indicating that it is being monitored by a maintenance request. The location is illustrated. When a call attempt or unanswered call is detected, the event It is checked whether the number occurred in a trunk group stored in 139. and, if so, the appropriate counter in block 140 (FIG. 4) is incremented. It will be done. This flag allows automatically initiated trunk group monitoring requests to be to distinguish it from monitoring initiated in response to commands entered from the console 105. It is held for a long time. This will be further explained with reference to FIG.

Figure 7 is a flowchart representing the program necessary to count unanswered calls. . This includes the cutting program 205 shown in Figure 3 and part of the translation program. Ru. The conditional jump instruction represented by block 125 in the cutting program 205 Therefore, an unanswered call will be detected. sample. Under the control of program 221 represented by block 126, This exchange-specific data, called translation data, is accessed and compiled into the trunk group. within the trunk group associated with the trunk on which the unanswered call was detected. member number is read. Program 221C central processing unit does not respond Execute a jump instruction for subroutine 121 of call counting program 120 It has been changed as follows. The unanswered call counting program 120 includes subroutines 121, 123 and 124, and a counter 128 (number 1) associated with the trunk group. 5) and if that trunk group is monitored, block 14 Increment the unanswered call counter for each trunk to 0 (FIG. 4). Subroutine 1 21, unanswered calls for that trunk group are counted by a counter 128. is counted. Next, subroutine 123 is executed, and under its control, the rank group identification number or 1, rank group number, and storage location 139 (No. A comparison is made between the numbers of the monitored trunk groups stored in Figure 6). Ru. If a match is found as a result of the comparison, the central processing unit 101 to subroutine 124 to control the increment of unanswered calls for a rank. A jump is made. The trunk member number is first controlled by the translation program 221. If the number is m, then m, mourning Trunk unanswered call count 143 (FIG. 4) is incremented.

Unanswered call data for various trunk groups also includes similar data from other switches. Can be combined with

Many systems are recording high rates of unanswered calls to and from certain switches. The data shown can be used to identify problems with common equipment on that system.

Figure 8 shows the number of attempts to use each individual member of the trunk group being monitored. It is a flowchart of a program that performs measurement. This flowchart is shown in Figure 3. Numerical analysis program 202. Japanese translation program 221 and traffic recording program It includes a part of the ram 220. Subroutine 13 of numerical analysis program 202 5, when completion of dialing is recognized, subroutine of translation program 220 routine 133 is called to identify the appropriate trunk group and use it within that group. The selection of available trunk member numbers is controlled. Next, the traffic recording proc. subroutine 134 of RAM 220 is called to try the selected trunk group. Controls the increment of counter 129. The traffic recording program 220 has been modified. The central processing unit jumps to the individual trunk attempt counting program. It is set to run.

The individual trunk attempt count program 130 consists of two subroutines 131 and and 132. Subroutine 131 determines whether the trunk group for this call is Controls checking for identity with monitored trunk group It is supposed to be done. The central processing unit 101 processes the selected trunk group. Compare the identification number of the trunk group with the identification number 139 of the trunk group being monitored (Figure 6). Compare. If a match is obtained as a result of the comparison, the central processing unit 101 → Under the control of the node routine 132, the selected The number of attempts 141 (FIG. 4) corresponding to the member number of the trunk that was selected is incremented. . Next, or if the comparison results in a mismatch, the central processing unit 101 Executes a jump to the log recording program 220 and records other log files under its control. Recording work completed.

FIG. 9 shows a flowchart of the individual trunk measurement program 150. During ~ The central processing unit 101 performs trunk group translation when executing this program. Data 158 (Figure 10) is accessed. Trunk group translation data 158 contains data 165 common to all members of the group (trunk Group translation; -ta 1.5B is also the first Group from member to the last member whose number is stored in position 160 Contains identification numbers for all trunks in the trunk. The trunk identification number is Used to access data about the current state (empty) of each trunk . Do not confuse the trunk identification number of a trunk with the member number. Mail The member number can be found in the list of block 158 or in block 140 (Figure 5). It only corresponds to a position in the set of counters.

Under the control of the execution control program 203, the central processing unit 101 executes approximately 100 Generates a signal once every second. The execution control program 203 uses this signal to To the initial subroutine 152 of the trunk utilization measurement program 150 (FIG. 9) Jump execution has been fixed. Under the control of subroutine 152 , position 139, is read out and the trunk group number stored in position 139 is read out. Used to access group translation data 158 (Figure 10). Sable Under the control of the routine 152, the central processing unit 101 stores the data block 158. , which in turn executes the group by executing subroutine 153. Read the number 159 of the first trunk in the group. Under the control of subroutine 154 , a check is made to see if the trunk is blocked, and if so, the bluech 155 controls the increment of the usage counter in block 140 corresponding to that trunk. control Next, the central processing unit l-1,01 executes a transaction under the control of subroutine 156. Shifts to trunk group translation data and there are more trunks in the group Check whether The next trunk identification number is accessed in data block 158. It is read out under the control of the subroutine 157 by accessing the subroutine 157. The loop consisting of routines 154, 155, 156 and 157 is repeated.

This process continues until the last trunk identification number 160 is read and Later, a loop check in subroutine 156 determines the individual trunk utilization measurement It is indicated that the program 150 is complete. As a result, the central processing unit 10 1 is a control program that executes a jump instruction and controls the central processing unit 101; Return to rum.

FIG. 11 shows execution blocks 120, 130, and 150 (FIGS. 7 to 9). for controlling the communication of data generated thereby to the maintenance console 105. 16 is a flowchart of a special 1-rahic data printing program 163; Maintenance Console message programs 216 are well known to those skilled in the art. maintenance console The Lumesage program 216 is modified to periodically run the central processing unit 101. A jump to the special traffic data printing program 163 is now executed. ing. The special traffic data printing program 163 has two subroutines 1 61 and 162. Subroutine 161 is a transaction system in an exchange system. of unanswered calls stored in locations 128 (FIG. 5) associated with each of the rank groups. Control data settings to control printing numbers.

Subroutine 162 counts all trunk attempts in the group being monitored. , among the counters in block 140 (FIG. 6) representing the number of calls used and the number of unanswered calls. control the setting of data to control the printing of content. Maintenance message control Various subroutines of program 216 then collect special traffic data. Print the data set by the print program 163 on the maintenance console 105 control what you do. The program flowchart states that the data is printed. However, the use of video terminals and large-capacity storage for later processing and display display in any other form, including recording or transmitting such data over long distances. It can also be displayed and recorded.

Figure 12 shows a flowchart of the monitored trunk group selection program. Ru. The trunks of the monitored group are individually identified using counters 140 (FIG. 4). Recall that it is measured by The function of program 170 is to determine the number of unanswered calls. exceeds a predetermined threshold.

After selecting a trunk group to monitor, select the trunk group variables that are to be monitored. Data 119 (Figure 5) is a counter that counts the number of unanswered calls for that trunk group. counter 128 and maintains a threshold for the maximum number of successful such calls for that group. It also includes a memory 127 for holding data. This threshold is the translation information of the switch. is predetermined as a part of The threshold depends on the size of the trunk group. A function of group size, which may be automatically calculated using an algorithm according to may be derived from a table that specifies thresholds as , or from the maintenance console. may be changed by a message.

Under the control of the execution control program 203, the central processing unit 101 A signal is generated once in between. The execution control program 203 is executed by this signal. The instructions for selecting the trunk group to be monitored have been changed to prevent the command from switching. control branching to program 170 (FIG. 12). Early part of program 170 Under the control of subroutine 171, the first trunk group of the switching system is Data stored in associated locations 127 and 128 (FIG. 5) is accessed. Ru. Under the control of subroutine 172, the two values are compared and if the crew If the group's number of unanswered calls 128 exceeds the group's threshold 127, then A jump is made by the central processing unit 101 to the subroutine 174, and the next The group will be monitored for one hour. The group has its identification number written to location 139 by central processing unit 101 under control of subroutine 174. Monitored when logged in. The number of unanswered calls is equal to or below that threshold. If less, a test controlled by subroutine 175 is executed; It is checked whether more trunk groups exist, and if so, The traffic data of the next trunk group is processed under the control of subroutine 173. It is accessed and consists of subroutines 172, 175 and 173. be monitored The loop of checking trunk groups to select the group that should be Ru. Program 170 selects a trunk group and assigns its number to the subroutine. 174 or controlled by subroutine 175. A check indicates that there are no more trunk groups for that station. control of subroutine 174 or subroutine 175. (by the central processing unit)! 01 is the jump to return to the execution control program. The execution control program controls the subsequent operation of the central processing unit. It turns out.

Handles cases where a station has a large number of poorly maintained trunk roofs. (-1 automatic: 3″1 to 9) When the trunk group monitoring selection process Also, C' does not always pick up the first of the failed trunk groups. It is preferable to leave it as is. Therefore, the selection process of program 170 is entirely all trunk groups, but limit the search to randomly selected trunk groups. or the next trunk group of the previously monitored trunk group. It is desirable to change it so that it starts from

Figure 13 shows the input from the maintenance console for selecting trunk groups to be monitored. Console request monitored trunk for control by message 17 is a flowchart of a loop selection program 178. This input message is Contains the identification number of the trunk group to be viewed. Maintenance console message The message program 216 identifies a new message type to represent this input message. It has been modified so that it can be separated. Once this message type is identified, the console A branch is taken to the file request monitored trunk group selection program.

Program 11gram 178 combines two subroutines 176 and 17.1. . Subroutine 176 creates a new tag representing a request to monitor a particular trunk group. Ipu no Me.

It is necessary to recognize the 1.1 details of the sage. Under the control of subroutine 176 , subroutine 177 is called to write the trunk group number in position 139. control the start of monitoring by setting the maintenance request flag 138 (Fig. 6). do. Under the control of subroutine 177, there is a maintenance function that controls the processing of the next input message. Mamoru console message.

A branch is taken to return control to the sage program 216.

By setting the maintenance request flag 138, maintenance requests are automatically generated. are given priority. This flag is monitored by maintenance requests. Cleared to keys that are no longer monitored. When the flag is not raised priority is given to requests from the maintenance console. Depending on the selection made by the loop selection program 170 (FIG. 12), the trunk group will not be monitored.

Triyuf b Snake 3 Hθ4 Hσ5 F/θ 7 F/θ　θ FIG 10 FIG./3 Procedural Amendment Form C) %formula% 2. Name of the invention: For identifying faulty communication lines Method 3 Person making the amendment Relationship to the incident: Patent applicant 6. Subject of amendment (1) “Translation of specification” international search report

Claims (1)

[Claims] 1. Inter-office trunk groups arranged as a group in a communication system via each trunk group during the first time interval in a way to identify failures; For testing purposes, set a threshold for the number of failures to complete an inter-office connection. counting the number of failures for each trunk group during a first time interval; Compare the actual number of failures with the set threshold, The failures of each circuit in the group that exhibited a greater number of failures than the threshold are each circuit counted during the second time interval and which exhibited more than the threshold failure during the second time interval. A method for identifying a failure in an interoffice trunk group characterized by recording the number of . Engraving (no changes to the content)