JPH06121029A - Telephone set extending circuit - Google Patents

Abstract

PURPOSE:To avoid the impossibility of extension due to a lack of space for transmission unit mounting, a difficulty in extension of a wiring cable, or the like by adding a hook switch detecting circuit to speech paths and connecting a telephone set for extension. CONSTITUTION:One of plural speech paths of a telephone set is provided with a connection means which connects this speech path to the outside of the telephone set, and a telephone set is extended through this connection means. For the purpose of extending this telephone set, an additional unit AD for extended telephone set is provided in the main telephone set. The input from a dial detecting circuit 207 of the main telephone set and information from an off-hook detecting circuit 209 for the extended telephone set are processed by a microcomputer 204, and the input from the main telephone set and that from the extended telephone set are assembled into a form, which can be recognized by a main device, as information of the main telephone set and information of the extended telephone set respectively and are transmitted to a transmission unit 101 of the main device through a transmission unit 201.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone extension circuit when a telephone having a plurality of communication paths is used in a PBX, a key telephone device or the like.

[0002]

2. Description of the Related Art In a conventional telephone having a plurality of communication paths, each communication path is functionally independent of each other.
If one communication path is used for handset communication, the other communication path is used for microphone and speaker, fax, computer data communication, and the like.

[0003]

According to the prior art, P
When a telephone is added to a BX or a key telephone device, it is necessary to provide a transmission unit corresponding to the extension telephone in the main device (in the case of a key telephone device, according to this example below). If the existing transmission unit has a margin, it can be used, but if there is no margin, a new transmission unit must be added. If there is no space to add a transmission unit to the main unit, it is impossible to add a telephone.

A wiring cable is also required, and if there is no room for accommodating an additional telephone in the existing wiring cable, a new cable must be added. If it is not possible to add a cable due to lack of wiring space or other reasons, the telephone cannot be added.

The present invention aims to eliminate such inconvenience.

[0006]

In order to achieve this object, in a telephone having a plurality of communication paths, one of the plurality of communication paths of the telephone is connected to connect the communication path to the outside of the telephone. A means (connector) is provided (there is no need to provide if an existing one can be used), and a telephone is added via the connecting means.

Here, it is assumed that the extension telephone uses a so-called frequency signal as the format of the dial signal.

Further, in this case, the communication path allocated for the additional telephone cannot be used for other purposes (microphone and speaker, fax, data communication of computer, etc.).

[0009]

1 is a system configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a system configuration diagram showing a second embodiment of the present invention.

In FIG. 1 and FIG. 2, each part separated by a one-dot chain line is a main unit of a button telephone device, a line,
The main telephone, additional telephone cord and additional telephone are shown.

1 and 2, the extension telephone cord is connected to the connector provided in the main telephone, and the extension telephone is connected via the extension telephone cord.

(First Embodiment) FIG. 1 shows a case in which an extension telephone additional unit is provided in a main telephone in order to add telephones.

In FIG. 1, a portion AD enclosed by a dotted line in the main telephone is the additional telephone additional unit.

The transmission units 101, 102, ... Of the main unit are installed individually corresponding to the respective main telephones, and communication contents such as a call or a fax with the transmission unit of the main telephone (hereinafter referred to as communication information) and It transmits and receives data consisting of information (hereinafter referred to as control information) for controlling the communication path such as connection / release of the communication path.

The transmission unit 201 of the main telephone outputs to the terminal B1 the communication information for the main telephone in the data received from the transmission unit 101 of the main device, and also the codec 20.
The communication information sent from 2 to the terminal B1 is sent to the transmission unit 101 of the main device as one of the data.

Among the data received from the transmission unit 101 of the main unit, the control information for the main telephone is output to the terminal D1 as a control signal and added to the microcomputer 204. On the contrary, the output from the microcomputer 204 to the transmission unit 201 is the terminal D1 of the transmission unit 201.
Is sent to the transmission unit 101 of the main device.

Input from dial detection circuit 207 of main telephone and off-hook detection circuit 20 for extension telephone
The information from 9 is processed by the microcomputer 204, and the input from the main telephone set is the information of the main telephone set, and the input from the extension telephone set is the information of the extension telephone set. The transmission unit 201 of the main device via the transmission unit 201
Sent to.

(Explanation of operation) (In the case of an incoming call to the main telephone) The terminal D of the transmission unit 201
An incoming signal is output to the signal No. 1, the output is processed by the microcomputer 204, and then the output drives the display control circuit 208, and an incoming signal is displayed by a visible / audible signal.

When the main telephone responds to the incoming call, the dial detection circuit 207 detects off-hook, the output is applied to the microcomputer 204, processed, and then sent as a response signal to the terminal D1 of the transmission unit 201, and further, the main device. To the transmission unit 101.

(Call route of main telephone) (For receiving call) Transmission unit 201 → Codec 202
→ Receiver amplifier 205 → Receiver 211 (for transmission) Transmitter 212 → Transfer amplifier 206 → Codec 202 → Transmission unit 201.

When the call ends and the main telephone goes on-hook, this is detected by the dial detection circuit 207, the output is processed by the microcomputer 204, and then output as a call end signal to the terminal D1 of the transmission unit 201, and further the main device. To the transmission unit 101.

When a disconnection signal comes from the transmission unit 101 of the main unit, it is received by the transmission unit 201 and output to the terminal D1 thereof, and the microcomputer 204 receives this and performs the processing of disconnecting the call and returns to the empty state.

(When calling from the main telephone) Calling information, for example, off-hook information is detected by the dial detection circuit 207,
After the output is processed by the microcomputer 204, it is sent as transmission information to the transmission unit 101 of the main apparatus via the transmission unit 201.

After receiving the calling information from the main telephone, the main unit returns a dial tone to the main telephone when the preparation for dial reception is completed.

If the main telephone receives a dial tone and then dials, it is detected by the dial detection circuit 207, and its output is applied to the microcomputer 204 for processing,
The dial information is sent to the transmission unit 101 of the main device via the transmission unit 201.

After receiving the dial, the main unit calls the called party, and if the called party answers, the call enters. The call route and subsequent operations are the same as in the case of an incoming call.

An incoming signal is output to the terminal B2 of the transmission unit 201 (in the case of an incoming call to the extension telephone), and the output is converted from a digital signal to an analog signal in the codec 203, and the reception amplifier 301 and the hook switch HS0.
And is added to the incoming call detection circuit 304 via. When the incoming signal is detected by the incoming call detection circuit, the incoming call generation circuit 305 is driven by the detected output to generate the incoming call tone.

When the extension telephone responds, the power supply + V applied to the off-hook detection circuit 209 via the hook switch HS1 is cut off by the operation of the hook switch HS1, and the off-hook detection circuit 209 detects the off-hook of the extension telephone. Detection output is microcomputer 2
Send to 04. The microcomputer 204 processes the input and sends a response signal via the transmission unit 201 to the transmission unit 101 of the main device.

(Call route of additional telephone) (For receiving call) Transmission unit 201 → Codec 203
→ receiver amplifier 301 → hook switch HS0 → receiver 3
06 (in the case of transmission) Transmitter 307 → Transmission amplifier 302 → Capacitor C1 → Hook switch HS1 → Capacitor C0 →
The codec 203 → the transmission unit 201.

When the extension telephone is on-hook by the end of the call, the power supply + V is again added to the off-hook detection circuit 209 by the restoration of the hook switch HS1, the off-hook detection circuit 209 detects the on-hook, and the detection output is sent to the microcomputer 204. . The microcomputer 204 processes the input and sends it as an end signal via the transmission unit 201 to the transmission unit 101 of the main device. If the other party hangs up the handset, it will return to the empty state.

(When making a call from the extension telephone) If the extension telephone goes off-hook, the power supply + V is switched to the hook switch HS.
The power supply + V applied to the off-hook detection circuit 209 via 1 is turned off by the operation of the hook switch HS1, and the off-hook detection circuit 209 detects the off-hook.
The detection output is sent to the microcomputer 204. The microcomputer 204 processes the input and sends it as an outgoing signal to the transmission unit 101 of the main device via the transmission unit 201.

The main device receives the transmitted signal,
When the dial reception preparation is completed, the main unit sends a dial tone to the extension telephone.

In the extension telephone, if the dial tone is opened and then dialed, the dial signal is sent from the dial circuit 303 to the transmitting amplifier, the capacitor C1, and the hook switch HS.
1, and is sent to the codec 203 via the capacitor C0. The dial signal applied to the codec 203 is converted from an analog signal to a digital signal here, and is sent to the transmission unit 101 of the main apparatus via the transmission unit 201.

In the main device, the output of the transmission unit 101 is appropriately converted from a digital signal into an analog signal, and then received by a dial signal receiving circuit as dial information.

After that, the main unit connects to the called party and then enters the call if the called party answers. The route of the call is the same as for the incoming call.

Thereafter, the termination / disconnection is the same as the case of the incoming call.

(Second Embodiment) FIG. 2 shows a case where a codec is provided in an extension telephone set.

The numbers given to the respective parts in FIG.
Those having the same numbers as those have the same functions as those in FIG.

Calls made by the main telephone in FIG. 2 are the same as those for the outgoing call and the incoming call in FIG. 1 for the outgoing call and the incoming call, respectively.

(Explanation of operation) (When an incoming call is received by the extension telephone) An incoming signal is output to the terminal B2 of the transmission unit 201, and the output is the buffer 213.
Then, it enters the codec 309 of the extension telephone, where it is converted from a digital signal to an analog signal, passes through the reception amplifier 301 and the hook switch HS0, and the incoming call detection circuit 30
Added to 4. When the incoming call detection circuit 304 detects an incoming call signal, the detected output drives the incoming call tone generation circuit 305 to generate an incoming call tone.

When the additional telephone responds, the hook switch operates, and when the hook switch HS2 is turned on, the power source + V is added to the buffer 214, and the buffer 214 is relayed and sent to the microcomputer 204.

The microcomputer 204 interprets this input as an off-hook signal and processes it, and sends the data as a response signal to the transmission unit 101 of the main unit via the transmission unit 201.

If a response is made on the additional telephone, the call is started.

(For reception) Transmission unit 201 → buffer 213 → codec 309 → reception amplifier 301 → hook switch HS0 → reception unit 306.

(For transmission) Transmitter 307 → Transmission amplifier 302 → Codec 309 → Buffer 213 → Transmission unit 201.

When the call ends and the additional telephone goes on-hook, the hook switch HS2 is turned off, the power source + V applied to the buffer 214 from the power source + V via the hook switch HS2 disappears, and the buffer 214 sends this to the microcomputer 204. Then, the microcomputer 204 detects the on-hook by this, processes the input, and sends the end signal via the transmission unit 201 to the main unit transmission unit 101. If the other party hangs up the handset, it will return to an empty state.

(When calling from the additional telephone) The hook switch is turned on by the off-hook of the additional telephone, and the power source + V is added to the buffer 214 via the hook switch HS2. The buffer 214 relays this to the microcomputer 204, and the microcomputer 204 processes this signal and sends it as an outgoing signal to the transmission unit 101 of the main apparatus via the transmission unit 201.

The main unit receives this outgoing signal, prepares for dial reception, and then sends a dial tone to the extension telephone.

When the extension telephone receives the dial tone and then dials, a dial signal is sent from the dial circuit 303 and input to the codec 309 via the transmission amplifier 302. The codec 309 converts the dial signal from an analog signal to a digital signal, and passes it through the buffer 213 and the transmission unit 201, and the transmission unit 1 of the main device.
Send to 01.

In the main unit, the output of the transmission unit 101 is appropriately converted from a digital signal into an analog signal, and then connected to a dial signal receiving circuit to receive it as dial information.

Thereafter, the main unit connects to the called party by the received dial signal.

If the called party answers, the call is entered. The call route and the end of the call are the same as those for the incoming call.

[0054]

As described above, according to the present invention, one telephone call path among a plurality of telephone call paths is dedicatedly dedicated to connect an extension telephone set.

According to the present invention, when a telephone is added, it is not necessary to add a transmission unit and a wiring cable from the main device to the main telephone, which are required for the main device individually corresponding to each telephone. is there. Therefore, there is no restriction that the extension cannot be made due to lack of space for installing the transmission unit on the main device side or difficulty in adding the wiring cable.

Further, the main telephone and the additional telephone can be completely independent and have equal call functions.

Additional unit for extension telephone (in the case of FIG. 1)
Since it can be made extremely small, there is no space-related difficulty in mounting it in the housing of the main telephone, if necessary, or wearing it in advance. The same applies to the mounting of the buffer circuit in the case of FIG.

In the present invention, the main device side is not required to allocate the space for arranging the necessary members for the extension of the telephone set, and only the telephone set side is allocated.

That is, there is an advantage that the main device side does not need to be touched when the number of telephones is increased, and the processing can be performed only on the telephone side.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a system configuration diagram showing a second embodiment of the present invention.

[Explanation of symbols]

AD ... Additional unit for additional telephone 101 ... Transmission unit of main device 201 ... Transmission unit of main telephone 202,203,309 ... Codec 205,301 ... Reception amplifier 206,302 ...
Transmitter amplifier 204 ... Microcomputer 207 ... Dial detection circuit 208 ... Display control circuit 209 ... Off-hook detection circuit 211, 306 ... Receiver 212, 307 ...
Transmitter 303 ... Dial circuit 304 ... Incoming call detection circuit 305 ... Ring tone generation circuit 213, 214 ...
buffer

Claims (2)

[Claims] 1. A telephone having a plurality of communication paths,
A telephone extension circuit in which a hook switch detection circuit is added to one of the plurality of speech paths of the telephone and an extension telephone is connected to the speech path to which the hook switch detection circuit is added. 2. A telephone having a plurality of communication paths,
A telephone extension circuit for connecting an extension telephone having a codec to one of the plurality of call outputs.