JP3249422B2 - Telephone line connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone line connector used in a system for transmitting service information to a called terminal before transmitting a call signal of a call.

[0002]

2. Description of the Related Art Currently, a caller's telephone (information receiving terminal)
An outgoing telephone number display service (pre-communication information notification service) in which a telephone station (subscriber exchange) informs a telephone of a called party of a telephone number of the telephone number is being experimentally performed in Yokohama, Nagoya and Fukuoka. This is a service that can be provided to the telephone of the called party who is connected to the line subscribed to this service and has a telephone number receiving function, and transmits a telephone number before transmitting an IR (call signal). The processing is added.

[0003] This telephone number sending process will be described with reference to the time chart of FIG. By calling the caller's phone,
The central office inverts the polarities of the two telephone lines L1 and L2. Then, the telephone office performs CAR (information receiving terminal activation signal).
(See FIG. 4) to the called party's telephone. This CAR
The telephone of the called party who has received the call closes the telephone line and sends a primary response signal to the central office.

When the telephone station detects the primary response signal, it sends an information signal (caller number) (modem signal) of the telephone number of the calling party telephone to the called party telephone. Upon receiving the modem signal, the called party's telephone sends a reception completion signal to the central office. This reception completion signal is the same signal as on-hook when the handset is lowered. When the telephone station detects the reception completion signal, it determines that the telephone number transmission processing has been completed and transmits a normal call signal (IR) (see FIG. 5).

[0005] In this way, the called party can be notified of the telephone number of the calling party before ringing.

[0006]

However, the method of detecting the CAR and the timing of transmitting the primary response signal after receiving the CAR are not uniform. When the telephone station receives the primary response signal, it stops sending the CAR. For this reason, for example, when a first telephone that detects CAR in 1 second and a second telephone that detects CAR in 2 seconds are connected (branched) to the same line, the first telephone first The central office detects the CAR and sends a primary response signal,
Stop sending AR. To this end, the second telephone is C
There is a problem that the second telephone cannot display the called party number because the modem signal is sent before detecting the AR, that is, when the modem signal is not ready to be received.

[0007]

SUMMARY OF THE INVENTION The telephone line connector of the present invention has been made in view of the above points, and transmits an activation signal to a called party terminal in response to a call from a calling party terminal. Which is used in a system for transmitting service information to a called party terminal based on a response of the called party terminal to the transmission, having a telephone line and a terminal connected to at least two or more terminals. Upon receiving the activation signal from the telephone line, the telephone line connection device transmits the activation signal to the connected terminals, and sends response signals to the telephone lines when response signals are received from all the connected terminals.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a main part of an embodiment of the present invention.

(1) is a telephone line connector. The telephone line connector (1) includes first to third three connection terminals (2) to
(4) First and second switches (5) and (6), polarity inversion detection circuit (7), CAR detection means (8), first and second primary response signal detection circuits (9) and (10) , A CAR generation circuit (11), a primary response signal generation circuit (12), and a control circuit (13).

[0010] The first connection terminal (2) is connected to the first telephone (1).
4) is connected. The second connection terminal (3) is connected to the second telephone (15). Here, the first and second telephones (14) and (15) have a function of receiving a calling number corresponding to the calling telephone number display service. The third connection terminal (4) is connected to the telephone line (16) of the central office. This telephone line (16) is a telephone line subscribed to the calling telephone number display service, and the telephone number of the caller is transmitted from the telephone office (9).

A first switch (5) opens and closes a connection between a first connection terminal (2) and a third connection terminal (4), and a second switch (5).
The switch (6) opens and closes the connection between the second connection terminal (3) and the third connection terminal (4). That is, the first switch (5) connects and disconnects the first telephone (14) to and from the telephone line (16), and the second switch (6) connects the second telephone (15) to the telephone line (16). ).

The polarity inversion detecting means (7) is connected to the third connection terminal (4), detects whether or not the polarity of the telephone line (16) has been inverted, and sends this detection signal to the control circuit (13). Output. Further, the CAR detecting means (8) is connected to the third connection terminal (4), and the C signal transmitted from the telephone line (16) is transmitted.
AR is detected and this detection signal is output to the control circuit (13).

First and second primary response signal detecting means (9)
(10) is connected to the first and second connection terminals (2) and (3), respectively, and detects primary response signals sent from the first and second telephones (14) and (15), respectively. A signal is output to the control circuit (13).

The CAR generation circuit (11) includes a control circuit (1).
By the control of 3), High 0.5 seconds as shown in FIG.
A pulse signal of Low 0.5 seconds is output to the first and second connection terminals (2) and (3). Primary response signal generation circuit (1
2) outputs a primary response signal to the third connection terminal (4) under the control of the control circuit (13). That is, the primary response signal generating circuit (12) is formed of a circuit forming a local loop similarly to a telephone, and this primary response signal is output by closing a switch (not shown) to form a closed loop.

Next, the operation of the calling telephone number display service according to the present invention will be described. FIG. 2 is a time chart showing this operation. FIG. 3 is a flowchart showing the operation of the control circuit (13).

In the standby state, the control circuit (13)
The second switches (5) and (6) are closed (S1).

Therefore, when there is a call from the caller's telephone, the central office inverts the polarity of the telephone line (16). When the control circuit (13) detects this inversion of the polarity from the polarity inversion detection circuit (7) (Y in S2), it opens the first and second switches (5) and (6) (S3).

Then, the telephone station sends a CAR (information receiving terminal activation signal) indicating the start of the calling telephone number display service to the third terminal.
To the connection terminal (4). This CAR is a pulse signal composed of High for 0.5 seconds and Low for 0.5 seconds, as shown in FIG. Note that a normal calling signal (IR) for calling the called party is a one-second Hig as shown in FIG.
This is a pulse signal composed of h and Low for 2 seconds, and CAR and IR are different.

The control circuit (13) detects the CAR within a predetermined time by the CAR detection circuit (N, S of S4 and S5).
7N), the CAR signal is output from the CAR generation circuit (11) to the first and second telephone sets (14) and (15) (S).
8). Thus, after confirming the CAR from the central office, the telephone line connector (1) sends the CAR to each telephone.

The first and second telephones (14) and (15) that have received the CAR each transmit a primary response signal. still,
The power supply (48V) for sending the primary response signal is CAR
This is performed by the generation circuit (11). By the way, the method of detecting the CAR and the method of transmitting the primary response signal after receiving the CAR are not standardized. For this reason, the transmission timing of the primary response signal of each telephone may be different. Therefore, the control circuit (13) causes the CAR to continue transmitting until the primary response signals of both the first and second telephones (14) and (15) are detected (N in S9, S8), and both primary responses After detecting the signal (Y in S9), the primary response signal generation circuit (12) outputs the primary response signal to the third connection terminal (4) (S9).
10).

Then, the control circuit (13) closes the first and second switches (5) and (6) (S11). The operations of the central office and each telephone set after the connection are the same as those in the related art, and the description is omitted.

Although the telephone station of the above-described embodiment has transmitted the information of the telephone number of the caller, this service is not limited to the telephone number of the caller, and is not limited to the telephone number of the caller. The present invention can be applied to all the service information transmitted to.

Although the terminal of the called party in the above-described embodiment is a telephone, it may be a display device that does not have a handset or dialing function and only displays the telephone number of the calling party.

[0024]

When a plurality of telephones are connected (branched) to the same line, all telephones can receive service information such as a called number, even if the transmission timings of the telephones are different from each other. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a main part of an embodiment of the present invention.

FIG. 2 is a time chart illustrating a transmission operation of a calling telephone number display service according to the embodiment.

FIG. 3 is a flowchart illustrating an operation of the control circuit according to the embodiment.

FIG. 4 is a diagram showing a signal waveform of a CAR in a calling telephone number display service.

FIG. 5 is a diagram showing an IR signal waveform in a calling telephone number display service.

FIG. 6 is a time chart showing a transmission operation of a conventional calling telephone number display service.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone line connector 2 1st connection terminal 3 2nd connection terminal 4 3rd connection terminal 5 1st switch 6 2nd switch 7 Polarity inversion detection means 8 CAR detection means 9 1st primary response signal detection Means 10 Second primary response signal detecting means 11 CAR generation circuit 12 Primary response signal generation circuit 13 Control circuit 14 First corresponding telephone 15 Second corresponding telephone 16 Telephone line

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 1/26-1/57 H04M 3/42 H04M 11/00-11/10 H04Q 3/58-3 / 62

Claims (1)

(57) [Claims] An activating signal is transmitted to a terminal of a called party in response to a call from a terminal of the calling party, and service information is transmitted based on a response of the terminal of the called party to the transmission. A telephone line connector having a terminal connected to a telephone line and at least two or more terminals, receiving the activation signal from the telephone line, A telephone line connector, which transmits an activation signal and sends a response signal to a telephone line when response signals are received from all connected terminals.