JP3415384B2 - Line test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] [0001] The present invention relates to, for example, police
Suitable for testing special lines such as lines and fire lines
It relates to a line test device. [0002] 2. Description of the Related Art Police and fire lines (Police and fire)
  Fire Line) is also called a PF line,
This is a special line from the machine to the reception desk of the police station or fire department.
General subscriber dials 110 or 119
The fire and police trunk of the switchboard (Fire and
  Policy Trunk (abbreviated as FPT)
Connected to PF line via, there is the nearest police reception desk
Or, if you receive a call at the fire reception desk and answer it, it will be a call. [0003] Fire and police trunks (hereinafter referred to as FPTs)
) Is a one-way trunk to police and fire department reception desks, etc.
Use this FPT (110, 119
No.) and the following, which is not in the call between general subscribers
It has features. ・ Even if the other party (reception desk) responds, analog subscribers
No berth information. In other words, from a public telephone
Usually, when you make a call, you will be in a one-way call.
Can be sent. ・ Even if the subscriber ends the call (on-hook) from the call state,
The line will be maintained if the stand does not talk. At this time,
The line cannot be broken. ・ Call the subscriber from the reception desk from the above line holding status
(Recall). [0004] Police and fire lines have two lines: A line and B line.
It is a wire system and can be controlled with a telephone line like an analog line of a telephone.
Also serves as your line. And the police and fire line
The system is classified into the following four systems according to the difference in the system. [0005] Telephone system (AC system) This means that, like a normal analog subscriber,
It uses R (16Hz) and uses it for both police and fire
ing. The reception side is a general telephone and the earth (or battery:
(For recall), the function can be satisfied. [0006] Police (DC) system It is used only by the police. Fire (DC) method This uses only firefighting, and the police (DC) method described above
And different. Fire ID system This is used only for firefighting, and the identification number of the caller
Is transmitted from the exchange to the reception desk as an ID using an MF signal.
It is a method that The MF signal is used for inter-station use.
PB signal / D used by general subscribers' touch phones
Different from TMF signal. FIG. 4 is a schematic block diagram of a telephone system.
FIG. 5 shows a sequence based on the signal system of the telephone system.
It is shown. That is, as shown in FIG.
In the case of, on the FPT side, line A and line B
And the current detection units 101 and 102 and the resistors R1 and R2
Through the open (disconnected) state and the state of the 16 Hz signal CR
State and -48V battery (hot earth) state
With a relay (indicated by the dotted line in the figure)
Can be switched. On the other hand, on the reception desk side, line A, line B
Are the current detection units 103 and 104 and the resistance R, respectively.
3, Via the R4, the state of the earth (G) or -48V
Connect the relay so that the battery (hot earth)
Switching is performed by a point (indicated by a dotted line in the figure). Also,
The CR detection unit 110 is connected between the A line and the B line.WhenBoth
Between the A line and the B line,
The detection unit 112 is connected to the contact point of the relay indicated by the dotted line in the figure.
It is. Then, as shown in the sequence diagram of FIG.
When the line is idle, the APT on the FPT side
Lines B and B are both disconnected (open), and
The line A on the platform side is disconnected, and the line B is disconnected or in the ground state.
The subscriber goes off-hook and downloads 110 or 119.
If you do, the A line will be in the state of (geo + CR) and B
The line is in battery state and an activation signal is sent to the reception desk. On the reception side, the signal C is detected by the CR detector 110.
R is detected and an incoming call is detected. And at the reception desk
When the answer operation is performed, the A line and the
And a loop is generated between lines B and a response signal is sent to the FPT.
It is. The FPT detects the generation of this loop,
Make a call. At this time, the A line is the battery (-48V)
This is the state, and the polarity of the line B is reversed to the ground state. Soshi
Thus, the subscriber and the reception desk are in a call state. Thereafter, when the subscriber goes on-hook, the FP
A busy tone is sent from T to the reception desk. The reception desk is
When it receives a call, it performs a recall operation. Then, the recall signal is accepted
Sent from the platform to the subscriber through the FPT. This and
A line and B line are both in the ground state,
The FPT causes the subscriber to recall the call and
Send the backing tone RBT to the reception desk. Next, when a call stop operation is performed at the reception desk, A
A loop is established between the line and the B line, and a recall stop signal is sent to the FPT.
Can be FPT receives a call to the subscriber by detecting the loop
Is stopped and a busy tone is played on the communication path to the reception desk. This
When the subscriber goes off-hook in the state of
Calls can be made. And the subscriber goes on-hook
FPT sends a busy tone to the call path to the reception desk.
You. In response to this, if you perform a disconnection operation at the reception desk, a disconnection signal
Is sent to the FPT. At this time, both line A and line B
It becomes disconnected (opened). FPT cuts both A and B lines
It detects and releases the subscriber's path, and both A and B of the PF line
Hold the idle state with the line disconnected. FIG. 6 is a schematic block diagram of the police (DC) system.
Fig. 7 shows the police (DC) signal method.
It shows a sequence based on an expression. As shown in FIG. 6, this police (DC) system
In the case of, on the FPT side, line A and line B
And the current detection units 101 and 102 and the resistors R1 and R2
Through the open (disconnected) state and the -48V battery (hot
The relay (Fig.
(Indicated by dotted lines in the middle). On the other hand, on the reception desk side, line A, line B
Are the current detection units 103 and 104 and the resistance R, respectively.
3. Via R4, the state of the earth (G) and the release (disconnection)
State of the relay so that it takes two states,
(Indicated by a dotted line). Then, as shown in the sequence diagram of FIG.
When the line is idle, the APT on the FPT side
Lines B and B are both disconnected (open), and the reception desk side
The A line is in the ground state, and the B line is in the disconnected state. The subscriber is off foot
Dial 110 and dial A and B
It becomes the state of the pond (-48V) and the start signal is sent to the reception desk.
It is. On the reception desk side, the A line is a battery (-48V)
An incoming call is detected by the state. And receiving
When a response operation is performed on the platform, both the A line and the B line
State and a response signal is sent to the FPT. The FPT detects the state of the earth on the B line,
Make a call. And the subscriber and the reception desk are in a call state
become. Thereafter, when the subscriber goes on-hook, the FP
A busy tone is sent from T to the reception desk. The reception desk is
When it receives a call, it performs a recall operation. Then, the recall signal is accepted
Sent from the platform to the subscriber through the FPT. This and
A line is disconnected, B lineIsIt is a state of the earth. And A line break
The FPT notifies the subscriber of the recall
And sends the ringback tone RBT to the reception desk. Next, when a recall stop operation is performed at the reception desk, A
Line and line B are in the ground state, and the recall stop signal is sent to the FPT.
Sent. The FPT detects the A-line geography and gives the subscriber
Stop incoming calls and play busy tone on the call path to the reception desk
You. In this state, when the subscriber goes off-hook,
Calls can be made between. And the subscriber goes on-hook
Then, the FPT displays a busy tone on the communication path to the reception desk.
Shed. In response to this, if you perform a disconnection operation at the reception desk,
The signal is sent to the FPT. At this time, the A line and the B line
It is in a disconnected (open) state. FPT is for both A and B lines
To release the subscriber's path,
The idle state where both lines A and B are disconnected is maintained. one
On the other hand, the reception desk restores the idle state of the A-line ground and the B-line disconnection.
Then, a disconnection signal is sent to the FPT. Next, FIG. 8 shows a fire fighting (DC) method and a fire fighting (DC) method.
It is a schematic block diagram of a prevention ID system. By fire ID system
Has an MF sender in the FPT and an MF receiver
A server is provided, but is omitted in FIG. FIG.
This shows the sequence for the firefighting (DC) method.
You. In addition, about the sequence in the case of the fire ID system
Is omitted. As shown in FIG. 8, this fire (DC) system
In the case of, on the FPT side, line A and line B
And the current detection units 101 and 102 and the resistors R1 and R2
Through the state of the earth (G) and the -48V battery (hot
The relay (Fig.
(Indicated by dotted lines in the middle). On the other hand, on the reception desk side, the line A
-48V battery via the detecting unit 103 and the resistor R3
State, earth (G) state, and open (disconnected) state,
Contact points of the relay so as to take three states (indicated by dotted lines in the figure)
), And the line B is connected to the current detector 1
04 and the resistance R4,
The relay is connected so that it takes two states, the released (disconnected) state.
Switching is performed by a point (indicated by a dotted line in the figure). Then, as shown in the sequence diagram of FIG.
In addition, when the line is idle, the A line on the FPT side is
The earth and B lines are cut off (open), and the A line on the reception desk side
Is cut off, and the B line is in a ground state. Subscriber off-hook
Then dial 119 and the A and B lines will have batteries
(-48V), the start signal is sent to the reception desk
You. On the reception desk side, the A line is a battery (-48 V)
An incoming call is detected by the state. And receiving
When a response operation is performed on the platform, both the A line and the B line
State and a response signal is sent to the FPT. In the FPT, the earth condition of the A line is detected, and
State. Then, the subscriber and the reception desk are in a call state.
You. Thereafter, when the subscriber goes on-hook, the FP
T is the state of A line ground and B line battery
I do. The reception desk, A line geography, this caller ahead
To detect. Next, the FPT transmits a busy tone to the communication path.
Send to reception desk through. When the reception desk receives this, the reception desk recalls
Do the work. Then, a recall signal is sent from the reception desk through the FPT.
Sent to the subscriber. At this time, A line is battery, B line
Is the state of the earth. Then, by detecting the A-line battery,
FPT allows the subscriber to receive a recall and
Send the RBT to the reception desk. Next, when a call stop operation is performed at the reception desk, A
Line and line B are grounded and a recall stop signal is sent to the FPT.
You. The FPT detects the A-line geographical condition and calls the subscriber
Stop and play a busy tone on the call path to the reception desk. this
In this state, when the subscriber goes off-hook, lines A and B
The battery is turned on, and the call is notified to the reception desk. Reception desk
Uses the A-line battery to detect this recall and communicate with the reception desk.
You can talk between them. When the subscriber goes on-hook, the FP
T is the state of A-line ground and B-line battery as the caller
To Reception desk, A line geography, this caller ahead
Is detected. In addition, the FPT sends the call to the reception desk
Play a busy tone. In response to this, disconnection operation at the reception desk
Then, a disconnection signal is sent to the FPT. At this time, A
The line and the B line are both disconnected (open). FPT
Detects disconnection of both A and B lines and releases subscriber's path
However, in the FPT, the line A will be in the idle state,
You. On the other hand, the reception desk waits for a timeout of about 4 seconds.
The line A is disconnected, and the idle state of the line B is restored. The police and fire lines described above are
In the event of a sudden failure, achieve the intended purpose
It is not possible to perform a line test periodically as appropriate.
It is important to keep. For this reason, conventional tests
Call the police and fire reception desks for
Test to see if it works properly
Was. [0036] However, in practice,
When making a phone call to test, the tester and the
An operator is required on each side of the platform,
The experiment took time and was troublesome. Therefore, the police / fire line test is automatically performed.
An automatic line test system to do
You. This system is used by police and fire department terminals
Switch from the reception desk to the test section when connecting
A line test device equipped with a line switching circuit
This line test equipment is remotely controlled and this line test
Performs automatic line tests by communicating with the equipment via the telephone network.
An automatic test control terminal is provided. Then, with this automatic line test system,
When actually performing the test, from the automatic test control terminal,
Pass the line test equipment through a separate line from the police and fire lines.
To start the test. Then, the line test equipment
Test of police and fire line from reception desk by line switching circuit
Switch to section. And, through the police and fire line,
Unit and the automatic test control terminal.
You. By the way, as described above, the PF line
There are four methods depending on the signal system.
If installed at a fire station,
Circuit for each line according to the signal system
It is necessary to make the work setting. Police station or fire department
In the office, PF lines are usually pulled in for multiple lines.
Therefore, this work setting is usually set by the operator
This is performed for each of the PF lines. Build an automatic line test system as described above
The test section of the line test equipment
As with the unit, it depends on the signal system of the PF line under test.
It is necessary to make the same work setting. Therefore, the testing department
However, a work injection circuit is set for each of multiple PF lines.
It is conceivable that the operator performs the work setting.
Can be However, in that case, the operator must
Not only the stand, but also the test section
In each case, it is necessary to set the work order, which is troublesome.
May cause a mistake in the setting work
In some cases, the line test cannot be performed correctly.
I will. [0042] In addition to the reception desk, the work is sent to the testing department.
It is necessary to provide multiple paths for multiple PF lines.
Become complex, large, and expensive
I will. The present invention relates to the above-described automatic line test system.
System line test equipment,
The purpose is to be able to eliminate problems that occur. [0044] Means for Solving the Problems To solve the above problems,
Therefore, the line test apparatus according to the present inventionPolice line and fire cycle
In order to test a special line such as a line,
Receive test signal from automatic test control terminal throughWas
A testing section forSpecialLinePolice and fire departments
Be providedFrom the connection status with the reception unit,
A line switching unit for switching to a connection state;SpecialSeparate from line
ofGeneralThrough the line,Connected to the automatic test control terminal
From the automatic test control terminal.The line switching unit is
Receives the instruction information for switching to the test section and
And a control unit for controlling switching of the line switching unit.
A testing device, wherein the testing unit comprises:Special lineSignal direction
In the formulaIt has a work setting section that can set the work
Your part isFor the work setting section of the test section,
From the dynamic test control terminalTry to do the testSpecial
Information indicating the signal system of the lineThereforeIndicated signaling
ToPerform the work setting according toIt is characterized by the following. [0045] In the line test apparatus having the above configuration, the control unit
Is the instruction information for switching the line switching circuit to the test section.
When you receive the information,
Switching from the reception unit to the test unit, at this time,
For example, the telephone number to be tested included in the instruction information
Based on the information indicating the signal system of the talk line,
Control the setting unit so that it conforms to the indicated signal system.
You. The construction setting section receives this and tries to test.
Execute the work setting suitable for the telephone line. As described above, the work setting is determined by the
Switch the line switching circuit to the test section according to the telephone line
It is performed when changing. Therefore, work is pre-installed for each line
No need for regular work
No construction mistakes occur. In addition, multiple lines are routed to the reception
Even if it is embedded, the injection circuit may be one of the common,
The hardware configuration of the line test equipment can be simplified.
In addition, the line test apparatus can be configured at low cost. [0047] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a circuit test equipment according to the present invention will be described.
Embodiments will be described with reference to the drawings.
In the example described below, the line test for the police and fire
This is the case when applied to the system that performs the test. FIG. 2 shows a system including the line test apparatus.
FIG. In FIG. 2, 1 is a police station
And terminal equipment set up at the fire department, which has multiple lines
Police and Fire Line 2 (hereinafter referred to as PF line)
Continued. The PF line 2 is the fire and police trunk described above.
(Hereinafter referred to as FPT) 3 and connected to the telephone network 5.
Connected to the exchange 4. On the other hand, through modem (modulation / demodulation circuit) 8, P
The automatic test control terminal 9 of the F line
The telephone network 5 is connected. This modem 8 is connected to an NCU (network
Control device). Automatic test control terminal 9
Is the PF line that is pulled into each police station and fire department
Which of the four types of signaling systems
Is provided. As will be described later, the automatic test control terminal 9
Perform a test based on the contents stored in this line type storage unit.
About each of the police and fire department PF lines
Information indicating the line type for
In the example, the terminal device should be included in the command to start the test.
Send it to the line test equipment of Part 1. In the terminal unit 1, the PF line 2 is connected to an external connection.
It is connected to the connection terminal section 11. This external connection terminal 11
Is a line test apparatus equipped with a line switching circuit as described later.
The connection 12 is connected to an external connection terminal 13. External connection
The connection terminal section 13 is connected to the manual reception board 14. The line test apparatus 12 is connected to the modem 15
Through the telephone network via the general line 6 which is not the PF line
5 is connected. This modem 15 is also an NCU (network control).
Control device). The line test apparatus 12 is provided therein.
Usually, the manual reception table 14 is set to P
The state is switched to a state of connecting to the F line 2. Also described later
As described above, the modem 8, the line 7, the
Line test equipment 12 through the telephone network 5, the line 6, and the modem 15.
When the test start instruction arrives,
Perform the test after setting the PF line 2
Disconnect the PF line to be
The test section is switched to the test section in the test apparatus 12. Also,
When the test is completed, connect the PF line 2 to the line test equipment.
12 so that it can be connected to the manual
Replace it. Then, the PF line 2 is
When switched to the test section, as described below,
Police station and erasure from automatic test control terminal 9 via PF line 2
Between the line test equipment 12 of the terminal equipment unit 1
Perform a line test for. What is the test result?
Conversely, from the line test equipment 12 to the modem 15, the line 6, the telephone
Automatic test control terminal 9 through network 5, line 7, modem 8
Sent. In this example, the line test apparatus 12 is shown in FIG.
It is configured as shown. That is, the line test device 12
Is a line switching unit SWP, an automatic test unit ATP, and a control communication unit.
And a communication unit CCP. The line switching unit SWP is connected to the control communication unit CCP.
Therefore, the test is performed by the test instruction from the automatic test control terminal 9.
It has a function to draw test lines. The automatic test unit ATP performs a call reception / response test.
Test, call recall test, called destination restoration test,
It has a processing function of a call connection test. The control communication unit CCP performs a call reception / response test.
Test, call recall test, called destination restoration test,
Control of the call connection test of the
And has a function of controlling communication with the automatic test control terminal 9. The line switching unit SWP includes a line switching circuit unit 21
And a relay control / monitoring unit 22. Line disconnect
The conversion circuit unit 21 is provided for each of the plurality of PF lines 2.
A line switching circuit 210 is provided. In FIG. 1, #
0Line, #1Line, ..., #n line is n+1Pieces
Of PF line 20Th,1, ..., n-th
A corresponding line switching circuit 210 is shown. Each of the line switching circuits 210 is shown in FIG.
As shown, each of the A line and the B line of the PF line is
Connect to the external connection terminal 13 side to which the reception table 14 is connected.
And the automatic test section ATP side of the line test apparatus 12
Switching contacts a0 and b0 for switching to a state of connecting to
It has. These switching contacts a0 and b0
Is one of relays LA and LB described later having a plurality of contacts.
Part contacts are used respectively. The relay control / monitoring unit 22 includes #
0Line, #1.., #N lines,
+1Drive corresponding to each of the line switching circuits 210
A control / monitoring circuit 220 is provided. Each of the drive control / monitoring circuits 220
Are provided with switching contacts that become the switching contacts a0 and b0.
And two relays LA and LB are provided.
To drive two relays LA and LB at the same time
Device drive circuit 221 is provided. Relay drive circuit 221
Is supplied with a relay drive control signal from the control communication unit CCP
Is done. In the case of this example, the switching contact a0 is connected to the relay L
A, and the switching contact b0 is connected to the relay LB.
Contacts that drive these relays LA and LB
When there is no switch contact a0, b0, as shown in FIG.
Is connected to the external connection terminal 13 side (break
contact). Then, the drive circuit 221 is connected to the relays LA and LB.
When the driving current flows through the switching contacts a0 and b0, the switching contacts a0 and b0
It is switched to the dynamic test section ATP side (make contact). The relays LA and LB are connected by the switching
Other switching controlled by switching in conjunction with contacts a0 and b0
Contacts a1 and b1 and these other switching contacts a1
And the switching state of b1 is controlled through the monitoring port 222.
It is supplied to the control communication unit CCP. In this example, FIG.
As shown, the monitoring port 220 is connected to the relays LA and LB.
Switching state when drive current is not supplied (break contact
Side) is grounded through the switching contacts a1 and b1.
Switching state when the drive current is supplied (make contact
Side) is a free end. Therefore, the relays LA and LB operate normally.
If it is made, the line switching circuit 210 is switched to the reception board 14 side.
When it is obtained, the monitoring signal SVA on the contact a1 side and
The monitoring signal SVB at the contact b1 is low level.
("0"), and these are
It is sent to the control communication unit CCP. The line switching circuit 21
0 is switched to the automatic test section ATP side,
Monitoring signal SVA on the point a1 side and monitoring signal on the contact b1 side
SVB is both high level ("1"), and these
Sent to the control communication unit CCP through the monitoring port 220
You. The control communication unit CCP communicates with the monitoring port 22
Line disconnection by signals SVA and SVB from 0
The switching state of the conversion circuit 210 is monitored. The automatic test section ATP includes a construction setting section 23,
And a line test unit 24. The construction note setting unit 23
It is possible to set the work order for any of the above four methods for the F line.
Control circuit from the control communication unit CCP.
According to the setting instruction information, the
Execute the corresponding work setting. That is, the number of PF attempts to start the test
If the signal system of the line is a telephone system, the sequence shown in FIG.
A and B lines can be switched.
As shown in the block diagram of FIG.
Activate the relay that performs the switching. Also,
Similarly, if it is a police (DC) type circuit,
Switching between A line and B line shown in Kens
As shown in the block diagram of FIG.
Activate the relay to be replaced. Sa
Furthermore, if it is a fire (DC) type circuit, the sequence shown in FIG.
The A and B lines shown in the
As shown in the block diagram of FIG.
Activate the relay to be replaced. Firefighting
The same applies to the line of the ID system. In the case of this example, as described above,
Police station or fire station side terminal device 1
The automatic test control terminal determines which type of PF line is used.
The automatic test control terminal is registered and stored in the terminal 9.
Control communication from terminal 9 through line 6 and modem 15
The unit CCP is instructed which type of PF line it is.
It is sent to the terminal device 1. Of the line test device 12 of the terminal device
In response to this instruction, the control communication unit CCP sends the construction setting unit 2
PF line that controls 3 and tries to test according to the test instruction
Is controlled so as to perform the work setting according to the method of (1). The line test unit 24 performs a called incoming call / response test,
Call recall test, called destination recovery test,
It has a trunk circuit that performs talk connection processing. In addition,
In response to the instruction from the Shinbu CCP,
Creation of various control signals and answer to control communication unit CCP
Send back. Next, with reference to FIG.
Operation of PF line by line test system with
The sequence is representative of the case where the PF line system is a telephone system
Let me explain. In the following description of the sequence,
The signal that is not described to be transmitted through the modem to the3And times
Wire test equipment 12 or FPT3Test control through
What is exchanged between the terminal 9 and the line test device 12
It is. First, an automatic test system is used for the line test.
A test start instruction command is generated from the control terminal 9. This trial
The test start instruction command is transmitted from the modem 8, the line 7, the telephone network 5-
Line 6-control communication of the line test apparatus 12 through the modem 15
It is sent to the receiving part CCP and received. Control communication unit CCP
Will start the test from this command
Any of the above four methods for the PF line 2
Analyze the information on whether or not the automatic test section ATP construction setting section 2
3 sends a control signal, and as described above,
Perform the same work setting. Next, the control communication unit CCP operates a plurality of PF times.
The number of times of the PF line specified by the instruction command in line 2
In order to pull in the line test equipment 12, the line switching unit S
WP line switching circuit corresponding to the designated PF line
The relay drive circuit 2 is connected to the relays LA and LB of the road 210.
A drive current is passed through 21. Thereby, the relay L
If A and LB are driven normally, the line switching circuit 210
The switching contacts a0 and b0 are respectively located on the ATP side of the automatic test section.
Is switched. Then, as described above, the relays LA and LB are correct.
It is always driven and the switching contacts a0 and
And b0 are switched to the automatic test section ATP side respectively.
The monitoring signal SVA from the monitoring port 222
And SVB both become "1" and the line switching unit SWP
Sends this to the control communication unit CCP. The control communication unit CCP receives this and monitors it.
If the signals SVA and SVB are both "1", the test
Judge that the PF line to be tried
A test is performed on a display unit (not shown) provided in the control communication unit CCP.
Displays the line to be attempted. Also, the line switching unit SWP
Also sends a display signal and is provided in this line switching unit SWP.
Display the line to be tested on the display (not shown).
U. Although not shown in FIG. 3, if
Reading of monitoring signals SVA and SVB by control communication unit CCP
As a result, the monitoring signals SVA and SVB
The PF to be tested is not in the state of "1"
If the line cannot be correctly pulled in, the control communication unit C
The CP is connected via the modem 15 to a line 6 different from the PF line 2.
Is transmitted to the automatic test control terminal 9 through the terminal. So
As a result, for example, the test is interrupted. As described above, the correct pulling of the line under test is performed.
When the test is completed, the automatic test control terminal 9
Make a call through the line. Then, FPT3 and P
If the F line is in the correct state, CR
(16Hz), control communication unit through automatic test unit ATP
Detected by CCP. Whether this call detection is performed correctly
Command is sent through the modem 15
Sent to the automatic test control terminal 9 where the test is interrupted
You. The control communication unit CCP detects the CR correctly.
The tester response signal (RA = 1)
It is sent to the automatic test control terminal 9 through the TP. And control
The communication unit CCP automatically receives the test circuit connection signal (TN = 1).
After sending it to the dynamic test section ATP, the response signal is sent to the automatic test section AT
It sends to the automatic test control terminal 9 through P. The automatic test control terminal receiving this response signal
Terminal 9 means a symbol [C] as a test call identification signal.
Control communication part CCP through PB signal through automatic test part ATP
Send to The control communication unit CCP transmits the reception result to the modem 1
5 and to the automatic test control terminal 9 through the line 6. An example
For example, if the reception of the test call identification signal is
Refused. When the test call identification signal is correctly received
Indicates that the control communication unit CCP uses the number as the level measurement signal.
A PB signal meaning "1" is sent through the automatic test section ATP
It is sent to the automatic test control terminal 9. Automatic test receiving this level measurement signal
The control terminal 9 indicates the symbol [D] as the level measurement signal.
Control communication unit through the automatic test unit ATP to taste the PB signal
Send to CCP. The control communication unit CCP modifies the reception result.
Sent to the automatic test control terminal 9 through the dem 15 and the line 6
You. In response, the automatic test control terminal 9 continues the test.
Or interrupt. When the measurement level is correct and the test is continued
Is the control communication unit CCP
The PB signal meaning "2" is sent through the automatic test section ATP
It is sent to the automatic test control terminal 9. When the caller performs a line disconnection operation,
Busy tone BT control communication through automatic test section ATP
Sent to the CCP. The control communication unit CCP
Automatic test control terminal through modem 15 and line 6
Send to 9. In this case, the automatic test control terminal 9 obtains the reception result
Even if is NG, the test is continued. The control communication unit CCP then transmits a recall signal
It is sent to the automatic test control terminal 9 through the automatic test section ATP.
The caller, that is, the automatic test control terminal 9 responds to this recall.
Then, the PB signal of the number “0” is automatically set as the re-response signal.
It is sent to the control communication unit CCP through the test unit ATP. System
The communication unit CCP transmits the reception result to the modem 15 and the
It is sent to the automatic test control terminal 9 via the line 6. Automatic test control
The terminal 9 receives this and continues or stops the test.
To decide. When the test is continued, the control communication unit CCP
Sends the PB signal of number “3” as a completion notification
It is sent to the automatic test control terminal 9 through ATP. And try
Sends an instruction to release the test circuit to the automatic test section ATP,
After that, the control communication unit CCP performs the unit disconnection (RA = 0) PF times.
Send to FPT3 over line 2. The control communication unit CCP operates the line switching circuit.
Cuts the path 210 from the automatic test section ATP side to the reception desk 14 side.
In order to switch, the power supply to the relays LA and LB is stopped.
You. As a result, the relays LA and LB operate correctly.
For example, the switching contacts a0 and b0 return to the state shown in FIG.
The switching circuit 210 switches to the manual reception board 14 side. Then, the relays LA and LB operate correctly.
Then, the switching contacts a1 and b1 also return to the state shown in FIG.
The exchange state signals SVA and SVB are both "0". System
The control communication unit CCP receives and reads this, and the test circuit
Confirm release of pull-in. And the control communication unit CCP
Sends a test line display release to the line switching unit SWP for display
Release. After that, the control communication unit CCP switches the line.
Information on whether the switching of the SWP was correctly performed and the test results.
Test control via modem 15 and line 6
It is sent to the terminal 9 and the test of the one PF line is completed.
You. The above operation is performed by the fire station or police station.
Executed for each of multiple incoming PF lines
Then, each PF line is checked. Soshi
The PF line that is about to start the test
Before pulling in to P, start test from automatic test control terminal 9
According to the line type information included in the instruction, the test unit ATP
Construction setting according to the signal system of the PF line
Implemented each time. Therefore, in this embodiment,
The work setting circuit of the work setting section 23 is used for multiple PF lines.
In contrast, it can be a common one, the configuration is simple, and the line test
The device can be made small and inexpensive. Also, line test equipment
It is not necessary for the operator to set the work order for
The installation work of the line test equipment is completed in a short time,
Note: Troubles due to mistakes in setting work will not occur. Note that, in the above example, the PF line
Line switching to switch the connection between the reception unit and the test unit
A relay having a plurality of contacts as switching contacts of the circuit 210
It is driven using some of the contacts of the
Switching of other contacts driven in conjunction with some of the contacts
Monitoring the status to ensure line switching
Can be detected. Therefore, the test is reliable
And the line switching to the reception unit is also performed reliably.
Can be monitored. [0091] As described above, according to the present invention,
For example, in the new automatic line test system described above,
To the line test equipment,
A work setting circuit that can set the work according to the method
When the line to be tested is switched to the test section,
An instruction is given from the test control terminal, and the
The desired work setting.
Eliminates the need for construction work with a generator. For this reason,
Note In addition to preventing setting mistakes,
Installation work is completed in a short time. [0092] In addition, one work is installed for a plurality of lines.
The circuit of the line test equipment is
Simplified, compact and inexpensive, with improved maintainability
Can be expected.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing one embodiment of a line test apparatus according to the present invention. FIG. 2 is a block diagram showing an overall outline of a line test system to which a line test apparatus according to the present invention is applied. FIG. 3 is a diagram showing a test operation sequence of an embodiment of the line test apparatus according to the present invention. FIG. 4 is a block diagram for explaining one type of signal system of a police / fire line. FIG. 5 is a diagram for explaining a sequence according to the method of FIG. 4; FIG. 6 is a block diagram for explaining another signal system of the police / fire line. FIG. 7 is a diagram for explaining a sequence according to the method of FIG. 6; FIG. 8 is a block diagram for explaining another signal system of the police / fire line. FIG. 9 is a diagram for explaining a sequence according to the method of FIG. 8; [Description of Signs] 2 Police / Fire Line 3 Fire / Police Trunk 6,7 Telephone Line 8,15 Modem 9 Automatic Test Control Terminal 12 Line Test Apparatus Manual Reception Board 21 Line Switching Circuit 22 Relay Control / Monitoring Unit 23 Note setting unit 24 Line test unit 210 Line switching circuit 220 Drive control / monitoring circuit 221 Relay drive circuit 222 Monitoring port SWP Line switching unit ATP Automatic test unit CCP Control communication unit

Continued on the front page (72) Inventor Takashi Sato 6-10-13 Nakanobu, Shinagawa-ku, Tokyo Co., Ltd. Inside (72) Inventor Sugawara 6-10-13 Nakanobu, Shinagawa-ku, Tokyo Daiko Electric Co., Ltd. Inside the factory (72) Inventor Shoji Hirano 3-192-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation Inside (72) Inventor Akira Kaneko 3-2-1-2, Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Telephone Co., Ltd. (56) References JP-A-1-314458 (JP, A) JP-A-4-311138 (JP, A) JP-A-6-38262 (JP, A) JP-A-8-307492 (JP, A) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04M 3/30 H04M 1/24 H04M 3/60

Claims (1)

(57) [Claims] [Claim 1] Testing of special lines such as police lines and fire lines
Automatic test control terminal through the special line to perform
A test unit for receiving a test signal from a line switching unit that switches the special line from a connection state with a reception unit provided at a police station or a fire department to a connection state with the test unit; The automatic test is performed through a general line separate from the special line.
A control unit that is connected to a control terminal , receives instruction information for switching the line switching unit from the automatic test control terminal to the test unit side, and controls switching of the line switching unit. there are, the test unit, the have Engineering Note setting unit capable Engineering Note set corresponding to the signal scheme of the special line, the control unit, to the machining Note setting section of the test section,
Before trying to do the test from the automatic test control terminal
Serial line testing apparatus and performing engineering Note setting corresponding to thus signaling indicated on the information indicating the signaling of the special line.