JPS6240852A - Telephone set connecting system - Google Patents

Abstract

PURPOSE:To continuously execute a call without deteriorating a speech quality, by moving a telephone set to other branch line destination and changing its connection by one set of telephone set which is being used, in the course of a call. CONSTITUTION:As a result of a response by an off-hook of a handset, in case of a call which requires a response by other branching circuit, its fact is transmitted to a transmitting person, and when a switch 21 of an additional device 11 is depressed, a relay 26 is operated by an output of a flip-flop 24, and by a resistance 27 which is connected in series to a contact 26', a loop of a direct current load is formed in a subscriber line 2. Thereafter, when a telephone set 8 is brought to an on-hook, and the telephone set 8 is moved and its connection is changed from the additional device 11 to 13, a call to the transmitting person can be executed from a movement destination.

Description

[Detailed Description of the Invention] [Summary] An additional device is installed for each branch line of a subscriber's line, and a telephone connected to the other end during a call is connected to the other branch via the line connected to one end of the additional device. Move to additional equipment installed on the line,
It is designed so that the connection can be changed.

[Industrial application field]

The present invention relates to an improvement in a telephone connection system.

Generally, when using a telephone line by branching and connecting multiple telephones on the same line, in order to maintain the operating state of the telephone exchange, the DC load on the same line will not be interrupted during a call. We take care to ensure that one or more telephones are off-hook at all times, and change the receiving location according to the request of the caller.
There is a desire to be able to use a connector or the like to move to another branch line during a call, reconnect, and continue the call.

[Conventional technology]

FIG. 3 is a conventional telephone connection diagram.

In FIG. 3, the subscriber line 2 from the telephone exchange 1 is
There are 3 branches at the terminal, and each branch line has 3 connectors. ．． 4.5 is installed, and beyond that (telephones 6 and 7 are connected).

When a call is received on the subscriber line 2, a nearby telephone 6 is used to answer the call, the handset is taken off-hook, and as a result of listening to the contents of the call, a person near telephone A7 located a little further away is detected. If you receive a call from a phone number 7, inform the person closest to phone number 7.
The person in question puts the handset of the telephone 7 off-hook and speaks with the caller, and after this state is ensured, turns the handset of the telephone 6 on-hook.

If the recipient (8) is for a person near connector 5, the phone 6
(After informing the three parties that I will move the phone and restore the connection,
While the handset of telephone 6 remains off-hook, telephone 7 is reconnected from connector 4 to connector 5, and the handset of telephone 7 is taken off-hook to continue the conversation. On],

[Problem that the invention seeks to solve]

However, according to the known method described above, in order to move a telephone during a call, two or more telephones are always required, and the handset and receiver of the telephone that was initially moved is not connected to the switching equipment. Since it is an A-hook to maintain the state, it is on.
Before hooking up, when I resumed a call with the 3 callers using the phone that completed the action, 7 bits of unrelated noise were heard: imm low tone (3 s), stiffness, direct call ζ, and 2 unrelated noises. Is there a problem?

[Failure to solve the problem 1 The present invention will be explained with reference to the principle configuration diagram shown in FIG.

In the figure, a subscriber line 2 connected to an exchange 1 is connected to a number of telephone connection lines, and an adder 11 (12, 13) of the present invention is connected to each branch line. Ru.

The addition &If includes a means 20 for bypassing between a pair of 1fl1 talk lines, a means 24 for issuing an open/short circuit instruction to the first bypass stage 20, a means 28 for detecting a voltage change between the talk lines, and Switch 2I for bypassing between
Consisting of

[Effect]

That is, according to the present invention, when a call is received from a telephone exchange and the handset of the telephone connected to the other end of the additional device is taken off-hook and answered, in the case of a call that requires a response on another branch line, , when the caller is informed of this and the switch 21 of the additional device is pressed, the bypass means 20 is short-circuited and activated by the output of the means 24, and a direct current is supplied to the subscriber's line to maintain the operating state of the telephone exchange. A load resistor is connected.

Therefore, it is possible to immediately put on-hook the handset of the telephone during a call and move to the attached device on another branch line.

〔Example〕

The contents of the present invention will be specifically explained below with reference to embodiments shown in the drawings.

FIG. 2 is a telephone connection diagram according to an embodiment of the present invention. Toward,
The same reference numerals indicate the same objects throughout the figures.

The difference between FIG. 2 and FIG. 3 is that additional devices 11, 12.13 are provided in place of each connector 3°4.5, and one end of each additional device is connected to the subscriber line 2 side. A telephone is connected to the other end of one device.

In FIG. 2, when a call is received from telephone exchange 1 to telephone 8 via subscriber line 2 and additional equipment 11, the recipient takes the handset of telephone 8 off-hook.

As a result of the call, the caller is connected to a branch line a little further away, and if the call is determined to be from a person close to 3, the caller is informed that the call will be transferred by moving the phone. , the addition 'Ji I' to which telephone 8 is connected? 1
When the switch 21 of 1 is pressed, Frisopf 11 knob 2
Earth air is applied to the set terminal S of No. 4.

Therefore, the set terminal S of the flip-flop 24 becomes level O only when earth air is applied, so the output terminal Q becomes level 1 and the output of the driver 25 becomes 0.

Since the relay 26 operates and closes its contacts when the driver 25 outputs 0, a loop is created in the subscriber line 2 as a DC load with the resistor 27 connected in series with the relay contacts.

That is, the detection circuit 28 detects the voltage change of the four wires 2 caused by the double loop caused by the off-hook telephone set 8 loop and the loop of the closed relay contact and the resistor 27, and uses the output to detect the voltage change in the four wires 2. The reset terminal R of the flop 24 becomes level 0.

This flip-flop 24 has the set terminal S prioritized in operation.

Therefore, the level of output terminal Q remains unchanged and relay 26 continues to operate.

After the above-mentioned loop is established, the handset of the telephone 8 is put on the hook, and the telephone 8 is immediately transferred from the additional device 11 to the telephone 13.
If you move and reconnect the telephone 8 via the additional device 13,
This allows you to continue talking to the caller from your destination.

At the same time, because the telephone m8 was moved and the handset was taken off-hook at the destination after the connection was changed, the loop acting as a DC load on the subscriber line 2 caused by the telephone 8 becomes double with the resistance 27 of the additional device 11. Therefore, the voltage change of the subscriber line 2 is detected by the detection circuit 28, and since the cent terminal S of the flip-flop 24 has returned to level 1 as before in this case, the output of the detection circuit 28 causes the flip-flop 24 to Since the reset terminal R of the terminal becomes level 0, and therefore the driver 25 also becomes level 1 when the output terminal Q becomes level 1, the relay 26 of the additional device 11 is restored, and the loop connection by the resistor 27 of the subscriber line 2 is also connected to the telephone 8. Additional equipment 1 before moving
It was restored and resolved without going to point 1.

〔Effect of the invention〕

According to the present invention, which has been explained in detail below, it is possible to move, disconnect, and make a call from one telephone in use during a call from the telephone to another branch line. It is possible to have continuous calls with other people, and without degrading the quality of each conversation.

[Brief explanation of drawings]

FIG. 1 is a diagram of the principle configuration of the present invention. Figure 2 shows an embodiment of the present invention. telephone connection diagram, Figure 3 shows the conventional example. It is a telephone connection diagram. In the figure, 1 is a telephone exchange, 2 is the subscriber line, 3.4.5 is a connector, 6.7.8 is a telephone, II, 12.13 is an additional device, 21.22.23 is a switch, 24 is a flip-flop, 25 is the driver, 26 is a relay, 27 is against 1 person, 28 indicates a detection circuit.

Claims (1)

[Claims] Means for short-circuiting a pair of communication lines via a bypass means (20) by operating a switch (21, 22, 23), detecting a voltage change between the lines, and opening the line ( 24) with additional equipment (11, 12, 13) connected to the subscriber line (2)
A telephone connection system that is installed on each branch line of the telephone and is characterized in that a single telephone call connected via one additional device can be connected to another additional device.