JPS6216077B2 - - Google Patents

Description

[Detailed description of the invention]

In an unmanned station, when the model of a terminal (telephone, etc.) is changed, the line accommodation position of the terminal in the exchange is switched from the old position to the new position by remote control from the master station. The present invention relates to a subscriber line switching device that is suitable for use. Generally, when changing a subscriber's telephone from a rotary dial telephone to a push-button dial telephone, in-house construction work at the central telephone office is carried out.
NG to translate subscriber accommodation location from subscriber number
(number group), it is necessary to perform work to change the connection of the accommodation terminal position from the old position to the new position (this is called accommodation change). Also, when changing the telephone number of a subscriber's telephone (this is called number change), the station must reconnect the housing position corresponding to the subscriber number as part of the number change work on the station side. . FIG. 1 is a block diagram for explaining the conventional switching of accommodation positions on the telephone exchange side during such accommodation change (or number change work). In the figure, 1 is the old terminal that was used until then.
1A is a new terminal to be used, 2 is a distribution board, and 3 is a switch. Here, it is assumed that the distribution board 2 and the exchange 3 belong to an unmanned station, so the exchange 3 is further connected to the master station. When replacing the housing, on the terminal side, work is done to replace terminal 1 with 1A (in-house construction)
On the unmanned station side, it is necessary to switch the jumper from the old accommodating position (A and B are call lines, C is the control line) to the new accommodating position at exchange 3, and the line side Construction work is also required. For this reason, conventionally, in order to minimize the time during which calls were unavailable on the terminal side, it was necessary to carry out on-site construction and in-office construction at the same time, and to complete the accommodation change within a short period of time. It was necessary to coordinate schedules for station staff to go to the unmanned station and work there, and such adjustments were time-consuming and had the disadvantage that accommodation changes could not be carried out efficiently. Similarly, when it came to number change work, subscribers had to go to the unmanned station and do the work inside the station at the date and time requested by the subscriber, so there was a similar drawback. The present invention has been made to overcome the drawbacks of the prior art, and the purpose of the present invention is to enable the subscriber to set up the service on the date and time desired by the subscriber, as long as the internal work is completed and set up in advance. It is an object of the present invention to provide a subscriber line switching device capable of performing accommodation switching or number change by sending a switching signal from a master station side. In order to achieve the above object, a subscriber line switching device according to the present invention is a subscriber line switching device used when switching a line accommodation position from an old position to a new position in an exchange accommodating a terminal. At the time of the switching, the old line from the terminal to the old housing position of the exchange is disconnected, and the new line is connected between the terminal and the new housing position via an open contact, and then the disconnected old line is connected. A first line taken out from the old accommodation position side, a second line taken out from the terminal side of the contact, a third line taken out from the new accommodation position side of the contact, and both the old and new accommodation positions. It has respective input terminals for connecting the respective control lines of the switch to each other, and a fourth line taken out from the connection point, and for receiving incoming signals and signals sent from the exchange side via the third line. It has first and second detection circuits that respectively detect switching signals, the first line and the second line are normally connected, and when an incoming signal is detected by the first detection circuit. The second line is disconnected from the first line and connected to a third line, and uses a specific signal sent from the fourth line in conjunction with the incoming signal. The second
The connection between the line and the third line is self-maintained, and the self-maintenance is released by canceling the specific signal,
Further, when the switching signal is detected by the second detection circuit, the respective input terminals are connected so as to connect and maintain the connection between the second line and the third line. It is characterized by the fact that it is equipped with a means to release it. Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is a circuit diagram showing one embodiment of the present invention.
In the figure, 1 and 1A are terminals located in the house. 2 is a distribution board, 3 is an exchange, 4 is a testing trunk, and 8 is a subscriber line switching device according to the present invention, all of which are installed in an unmanned station. 5 is an output trunk for testing, and 6 is a test stand, which are installed in the master station. 7 is a relay line. In the subscriber line switching device 8, 81 is an incoming signal detection circuit, 82 is a switching signal detection circuit, _t1 to _t3 are T relay contacts, _s2 and _s3 are S relay contacts, D ₁ and D ₂ are diodes. Further, in the distribution board 2, 21 is a plug contact that separates the exchange 3 side from the terminal device 1 side. Next, the work process and circuit operation will be explained. After completing the jumper switching work from the old housing position to the new housing position in the switchboard 3, mark the areas between the H ₁ and V ₁ terminals and between the H ₂ and V ₂ terminals on the distribution board 2 with an x mark, respectively. cut like this. Furthermore, the upper and lower left sides of the plug contact 21 are connected to the H ₁ and H ₂ terminals, and the upper and lower right sides are connected to the new lines A ₁ and B ₁ , respectively. Furthermore, between the distribution board 2 and the switching device 8,
_As shown in _the diagram, _V1 and terminal ₁ , _V2 and terminal Similarly, the _B1 side and terminal RO (terminals RO and C are multi-connected), and the contact k connecting control line C and C ₁ are connected to terminal A, respectively. Furthermore, within the switching signal 8, terminals RO and N are also connected. With the above, the setup for switching the accommodation position in the exchange 3 is completed, and by sending out a switching signal from the test stand 6, switching can be performed at any time convenient for the subscriber. Further, there is no problem in making a call using the terminal 1 not only after the switching is performed but also before the switching is performed. This will be explained below based on circuit operation. First, regarding the circuit operation before switching is performed: When making a call from terminal 1, the call must be made from the old accommodation position. The circuit is H ₁ → upper left of plug contact 21 → terminal t → t ₂ → s ₂ →
Terminal → V ₁ → A and H ₂ → Lower left of plug contact 21 → To terminal → t ₃ → s ₃ →
The terminal 1 can make a call from the old accommodation position by the circuit of terminal 1→V ₂ →B. On the other hand, since the jumper connection pipe is terminated at the exchange 3, the incoming call to the terminal 1 is made via the new accommodation position. In other words, in this case, the new accommodation position is captured from the master station via the test line, and then
By operating a telephone key on the test stand 6 or the like, an incoming signal with a negative potential of -48V is sent to one communication line (B ₁ in this case). Then, the following circuit is created: B ₁ → Lower right of plug contact 21 → Terminal Ro → Terminal Nu → Diode D ₁ → Incoming signal detection circuit 81 → T relay → t ₁ → Earth E, the T relay operates, and its contact
t ₁ to _{t 3} are switched to positions opposite to those shown in the figure. On the other hand, when an incoming call is received, the ground potential is sent to the control line _C1 , so the T relay holds itself by the circuit _C1 →k→terminal A→ _t1 →T. As a result, A ₁ → upper right of plug contact 21 → terminal N → t ₂ → terminal G → upper left of plug contact 21 → H ₁ circuit, B ₁ → lower right of plug contact 21 → terminal RO → t ₃ → terminal A call can be received at the terminal 1 through the circuit H → lower left of the plug contact 21 → _H2 . When the call ends, the ground potential sent to control line _C1 is removed, so the T relay is restored.
Each contact point from _t1 to _t3 returns to the illustrated position. As a result of the above, before switching is performed, terminal 1
It can be seen that it is possible to make and receive calls. Next, regarding the execution of switching, at the time of switching, from the test bench 6 to the test trunk 5
A signal with a positive potential of +50 volts is sent as a switching signal to one communication line (B ₁ in this case). Then, the switching signal detection circuit 82 is activated by the circuit of B ₁ → lower right of the plug contact 21 → terminal RO → terminal N → diode D ₂ and the switching signal detection circuit 82, and the S relay is operated. The contacts s ₂ and s ₃ are then switched to positions opposite to those shown. Therefore, A ₁ → upper right of plug contact 21 → terminal N → terminal E → s ₂ → t ₂ → terminal G → upper left of plug contact 21 → H ₁
Then, B ₁ → Bottom right of plug contact 21 → Terminal RO → Terminal C → s ₃ → t ₃ → Terminal → Bottom left of plug contact 21 → H ₂ By the circuit, from now on, the terminal 1 will move to the new storage position. You can make and receive calls through it. In addition,
The S relay is a mechanical latch type relay, and once activated, it maintains its operating state and will not recover unless a release signal is sent next. Furthermore, when a call is received, as mentioned earlier, the incoming signal detection circuit 81 operates, the T relay operates, and the contacts _t1 to _t3 are switched to the opposite position from that shown in the figure.
Since terminals E and D and terminals C and B are each connected in multiple ways, there is no change in the incoming circuit of terminal 1. After executing the switching Once the switching has been completed as described above, a staff member from the master station selects a convenient day, goes to the unmanned station, and disconnects the contact 21 by pulling out the unillustrated plug from the plug contact 21. Directly connected. Then, the subscriber line switching device 8 is removed by removing the wiring at terminals I to N. FIG. 3 is a circuit diagram showing another embodiment of the present invention. In the case of a number change, a directory assistance service (a service that notifies people of the new number, this is called the AIS service) is provided to people who call the old number. An example that can be implemented is shown. In the figure, the subscriber line switching device 8 includes:
In addition to adding the SA relay and its contacts sa, AIS
Connect the additional device 9 and the NG frame 10 as shown. Now, if the subscriber line switching device 8 receives a switching signal, the switching signal detection circuit 82 detects this, and the S relay operates to close the contact _s0 . Therefore, additional relay SA operates and contact sa closes.
Therefore, the AIS relay in the additional device 9 operates and the contact
ais from the accommodation position side in the NG frame 10.
Switch to AIS side. Therefore, from now on, anyone calling the old number will be connected to the [telephone number] terminal in the NG frame 10, and can receive directory assistance service from a directory assistance trunk (not shown) via the AIS terminal. As explained above, changing the terminal model, etc.
When carrying out work to change the location of telephone lines in a switchboard due to number change, etc., conventionally, in order to minimize the time when the terminals are unavailable, the work within the station and the terminal side work are completed at the same time. However, by using the subscriber line switching device according to the present invention, it is possible to carry out in-station construction in advance, and the remote master station can be connected to the remote master station at any time according to the convenience of the terminal. Switching can be carried out by sending a switching signal from the switch, which has the advantage that switching work can be carried out efficiently. Furthermore, since it is possible to easily switch according to the convenience of the customer (terminal) while minimizing the time during which calls are unavailable, it also has the advantage of improving customer service.

[Brief explanation of the drawing]

FIG. 1 is a block diagram for explaining the switching of accommodation positions on the exchange side during conventional accommodation change, FIG. 2 is a circuit diagram showing one embodiment of the present invention, and FIG. FIG. 2 is a circuit diagram showing an example. Description of symbols 1, 1A...Terminal, 2...Distribution board, 21...Plug contact, 3...Exchange machine, 4...
Input trunk for testing, 5...Exit trunk for testing, 6
... Test stand, 7 ... Trunk line, 8 ... Subscriber line switching device, 81 ... Incoming signal detection circuit, 82 ... Switching signal detection circuit, 9 ... Additional device, 10 ... NG
flame.

Claims (1)

[Claims] 1 A subscriber line switching device used when switching the line accommodation position from the old position to the new position in an exchange that accommodates a terminal, which is used to switch the line accommodation position from the terminal to the old accommodation position of the exchange during the switching. After disconnecting the old line and connecting the new line between the terminal and the new housing position via the open contact, connect the first line taken out from the old housing position side of the disconnected old line and the contact point. The second line taken out from the terminal side, the third line taken out from the new accommodation position side of the contact, and the control lines at both the old and new accommodation positions are connected to each other, and the third line taken out from the connection point is connected to each other. It has input terminals that respectively draw in the 4 lines and , and also has first and second detection circuits that respectively detect incoming calls and switching signals sent from the exchange side via the third line. , the first line and the second line are normally connected, and when an incoming signal is detected by the first detection circuit, the second line is connected to the first line. is disconnected and connected to a third line, and is connected to the second line and the third line using a specific signal sent from the fourth line in conjunction with the incoming signal.
The connection with the second line is self-maintained, and the self-maintenance is released by canceling the specific signal.
When a switching signal is detected by the detection circuit, the respective input terminals are connected or disconnected so as to connect and maintain the connection between the second line and the third line. A subscriber line switching device characterized by comprising means for.