JPS5855702Y2 - Call detection device - Google Patents

Description

[Detailed explanation of the idea] Technical field of invention The present invention relates to a call detection device.

Technical Background Using a telephone with a button, the type of outgoing call can be distinguished by whether or not a button is pressed when making a call, and the switchboard can identify this and connect accordingly, providing various conveniences for services. is obtained.

PRIOR ART AND PROBLEMS Conventionally, when making a call on a button-equipped telephone, the detection of whether or not a button is being pressed has normally been carried out by a connection information receiving device of an exchange, that is, for example, by a dialing register that receives a subscriber's dial. .

For example, when a telephone with a button is used to respond to incoming calls on the central office line of a distributed relay private branch exchange, as shown in Figure 1, in conventional equipment, when a call arrives on the central office line, the subscriber SUB presses the button in order to respond to the call. When the user presses the button and picks up the handset to make a call, as is well known, the connection is made to the outgoing register OR via path 1 in the link L, and the call is made by pressing a button at the outgoing register OR.

It detects this, identifies that the call is for a response to an incoming call from the central office line, and transmits the call from the calling register OR to the common control device C0N.
T is activated, route 1 is disconnected, and via another route 2, the calling subscriber SUB is connected to the central office line transformer COT where the call was received.

In this device, the calling subscriber SUB is first transferred to the calling register O.
Since the connection is connected to R, and then this connection is disconnected and the connection is made again to the central office trunk, an extra load is placed on the exchange, and the function to detect a call when a button is pressed is set to all call registers. There are disadvantages such as that the calling register is expensive because the calling register must be kept at the same time, and that if the calling party cannot pick up the calling register OR because all calls are being made, it will not be possible to respond to an incoming call on the central office line.

Furthermore, to explain a line concentrator as an example, the telephones of residents of collective housing such as condominiums and apartments are accommodated in one line concentrator, and the telephones are configured so that they can be connected in a straight line via this line concentrator. If a telephone with a button is used, and if, for example, a call between two telephones is distinguished from a general call by whether or not a button is pressed, the connection between the telephones can be made using a shortened number. If the button attached to the telephone is used only for emergency calls, the above advantages will disappear, but it will be convenient to be able to call the manager, for example, by simply pressing the button. be.

However, in conventional devices, when a call is made from the above-mentioned telephone, the calling telephone is connected to the calling register of the master station via a line concentrator, and the pressing of a button is detected by the calling register.
The drawback is that all these calls place a load on the master station.

As mentioned above, in the conventional device, a button press detection section must be added to all the connection information receiving devices from the caller, such as a call register, and an extra load is placed on the exchange during the connection or exchange process. There are economic and operational disadvantages.

In addition, the conventional device has only one auxiliary button, and it is not possible to select various types of outgoing calls with one touch of the button.

Purpose of the invention The present invention eliminates these drawbacks, provides an economical call detection device from a button-equipped telephone that is economical, does not place an extra load on the exchange, and allows selection of three types of calls with a single touch. The purpose is to provide the following.

Examples of ideas Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention.

In the figure, a telephone device with a button PB and a different push button PBE are installed in the subscriber SUB.

General calls shall be made without pressing button PB.

If the subscriber SUB picks up the handset of the telephone set for a general call without pressing the button PB, the subscriber circuit common section SC
C battery, resistor R1 contact Ckb2, relay L provided for each subscriber, contact CO2, line, telephone equipment, push button PB
break contact, contact CO1, subscriber circuit common part SCC
A first calling circuit is closed through the relay contact cka and the earth.

This call origination circuit corresponds to the origination of calls for general telephone calls, and a rule L provided for each party operates in this circuit.

As a result, contact l closes, so that the scanning device SCN, which is common to the subscribers, detects this and transmits information about the presence of a call and the location of the equipment of this calling subscriber to the common control device C.
Send to 0NT.

Then, from the common control device C0NT to the relay drive unit RD
Then, the relay CKA of the subscriber circuit common section SCC is activated.

Since the contact cka is opened, the operating circuit of the relay L is disconnected and restored, and the contact l is opened.

The scanning device SCN detects the opening of contact l and identifies that this call is a general call.

The common control device C0NT obtains information from the scanning device SCN that this call is a general call, and performs corresponding processing.

When the subscriber SUB picks up the handset of the telephone set while pressing the button PB, the battery and resistor R of the subscriber circuit common section SCC
1 contact Ckb 2 Right rule provided for each subscriber L, contact C
O2, track, telephone holder, button PB make contact, contact ck
b1, close the second calling circuit via the ground air.

In this circuit, relay L operates in the same way as above, and contact l
is closed, the scanning device SCN detects this and sends this information to the common control device C0NT, which activates the relay CKA and opens its contact cka.

The connection process up to this point is the same as that for the first calling circuit, but since the second calling circuit does not include contact cka, it will not be disconnected by opening contact cka, and therefore relay L will not be disconnected. Does not recover.

Since the scanning device SCN does not detect the recovery of the relay L, the common control device C0NT receives this information or detects this state and determines that the call is not from the first calling circuit, that is, it is not a general call. After the identification, the relay drive circuit RD is instructed to temporarily operate the relay CKB, and the process moves to the next stage of identification.

In addition, when the subscriber SUB presses the button PBE without picking up the handset of the telephone device, the battery of the subscriber circuit common section SCC, the resistor R1 contact Ckb2, the relay L provided in each subscriber circuit SC, the contact CO2, and the line , button P in subscriber SUB
The third calling circuit that passes through the contact of BE, the contact Ckb1 of the rectifier RFC subscriber circuit common section SCC, and the ground air is closed.

Similarly to the above, relay L operates, scanning device SCN detects this, operates relay CKA, and temporarily opens contact cka.

In this case, as in the case of the second calling circuit, the relay L
does not recover, so relay CKB operates temporarily as in the case of the second calling circuit.

Now, due to the operation of relay CKB, contacts ckb1. ckb
2 is switched, in the second and third calling circuits, the contact Ckb1, which had been connecting the earth air, will now connect the battery, and the contact ckb2, which had connected the battery, will now connect the earth air. The polarity of the voltage is reversed.

At this time, if the second calling circuit is closed, relay CKB
During operation, even if the voltage polarity is reversed, the rotation is not cut off and the relay L
will not recover.

If the third calling circuit is closed, when the operating voltage polarity of relay CKB is reversed, the circuit current is blocked by rectifier RFC connected in series to the contacts of button PBE, and therefore relay L is restored. do.

As described above, first, it is identified that a call has been made by the operation of relay L, and then when relay CKA is temporarily activated, it is determined whether relay L is restored or not. The common control device C0NT moves on to the corresponding connection operation.

Contacts CO1 and CO2 are contacts of a line cut-off relay (not shown), which opens when the connection of the subscriber telephone device is extended to the next connection device via the link.

FIG. 3 is a block diagram for explaining the operation when the present invention is applied to a distributed relay stand type private branch exchange.

If the subscriber SUB simply picks up the horizontal telephone receiver and makes a call, the first calling circuit will make a general call.

If the user presses the button PB and picks up the handset to make a call, the second calling circuit will be used to make a special call, for example, for responding to a central office line.

That is, when a call arrives on the central office line, when the subscriber SUB presses the button PB to answer the call and makes a call, the common control device C0NT
, it identifies that the call is originating from the second calling circuit, that is, it is a response to an incoming call on the central office line, and immediately selects an empty route 2 in link L without connecting to the calling register, and connects it to the central office line trunk COT where the call is being received. Connecting.

Further, when the subscriber SUB presses the button PBE, the third calling circuit initiates a call, for example, an emergency call.

In this case as well, the common control device C0NT identifies this, immediately selects the empty route 3 of link L, and activates the emergency trunk EMT.
An emergency call is made to a telephone directly connected to the trunk EMT, such as in a security guard's room, and if the security guard answers, the call can be made.

As described above, by applying the present invention to this type of private branch exchange, no extra load is placed on the exchange when processing special calls such as answering incoming calls from central office lines, and there is no need to make changes to the calling register. Moreover, you can respond to incoming calls on the central office line even when you cannot pick up calls because the calling register is full, etc., and button PBE can be used for other calls.
If the BE is used for an emergency call, for example, a security guard can be called in one touch and a call can be made by responding, and the connection can be made even when the call register is busy as described above.

FIG. 4 is a block diagram for explaining the operation when the present invention is applied to a line concentrator.

Subscriber 5UB1 accommodated in the line concentrator...
If a 5UBo (for example, a resident of a condominium, apartment, etc.) makes a call without pressing the buttons PB and PBE, the call will be processed as a general call by the first calling circuit,
Connections are made to line concentrator LC1, trunk line L1. L2 etc., line concentration part L
It extends to the master exchange EX via C2, and the master exchange EX
shall be treated in the same way as subscribers of the parent station directly accommodated in the .

If you press button PB to make a call, the call is for mutual passage between subscribers accommodated in the line concentrator, so the line concentrator LC
The common control device C0NT1 provided in
This information is transferred via DEM2 to the common control device C0NT2 of the line concentrator LC2 connected to the central exchange EX.

Based on this information, the common control unit C0NT2
A trunk line, for example L2, captured in the concentrator LC1 of UB1 is connected to a register R via a register link RL, and the called party number dialed by the calling party is stored in this register R.
The receiver will be recorded and will not be connected to the central exchange EX.

The called party number recorded in register R is transmitted to common controller C.
0NT2, the modem MODEM2, the signal line S, and the modem MODEM1 to the common control device C0NT□, and the common control device C0NT1 uses this information to call the calling party SU.
B□ and the called party SUB are connected to the intra-office trunk IOT via the line concentrator LC1 to enable communication.

When the subscriber 5UB1 presses the button PBE, the common control device C0
NT1 identifies a different special call, such as an emergency call, by the third calling circuit, connects it to the emergency trunk EMT via the line concentrator LC1, and connects it to the emergency trunk EMT connected to this trunk EMT, for example, in the manager's room. An emergency call is made to telephone G, and if the manager answers, the call can be made.

As mentioned above, connections can be made between subscribers connected to a concentrator using only the concentrator without placing any load on the central exchange EX, and emergency calls can be made with a single touch using only this concentrator. Furthermore, connection can be made even when all trunk lines are busy.

Effects of the Invention As mentioned above, the device of the present invention can be realized economically by using two relays provided in the subscriber circuit common section SCC provided in common for many subscribers and a small number of related circuits.
In addition to general calls, subscribers can receive general calls and
There are advantages such as being able to service two types of special calls by pressing the button.

Of course, the above two types of special calls are not limited to those described above, and can be arbitrarily selected within the range that can be realized by the exchange to which the device of the present invention is applied.

[Brief explanation of drawings]

Figure 1 is a block diagram for explaining the reception response of a central line in a conventional distributed relay type private branch exchange, Figure 2 is a connection diagram of an embodiment of the present invention, and Figure 3 is a block diagram of a conventional distributed relay type private branch exchange. FIG. 4 is a block diagram for explaining the case where the present invention is applied to a line concentrator. In the figure, PB and PBE are buttons, position is a telephone, SC is a subscriber circuit, glue in Figure 2, CKA and CKB are relays, and S
CC is a subscriber circuit common section, RFC is a rectifier, SCN is a scanning device, C0NT is a common control device, and RD is a relay driving device.

Claims (1)

[Scope of utility model registration request] Operates in the subscriber circuit by a telephone having a button that allows selection and designation of one of three types of calling circuits corresponding to the type of call, and the above-mentioned calling circuit which is closed by a call from the telephone. Equipped with a relay, when making a call from the above telephone,
In the subscriber circuit common section, temporarily disconnect the first circuit of the three types of calling circuits, further temporarily reverse the voltage polarity of the second and third circuits, and detect the operating state of the relay in the subscriber circuit. A call detection device characterized by identifying the type of call.