JP2947476B2 - Telephone exchange system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a method for switching between external and internal lines or between internal lines to enable external and internal telephone calls with a commercially available telephone, and for door phones outside the home. And a telephone exchange system in which a door phone call can be made with a telephone in the house.

In the prior art] telephone switching system of this kind, as shown in FIG. 3, the connecting telephone switch A which is provided in the home to the central office E through the protective device and the switching division unit in external l ₁ , Extension l ₂
And connecting a plurality of telephone outlet B by the control line l ₃ to telephone exchange A, it is connected to the intercom D that is installed outside the house further call lines l ₄ in telephone exchange A.

Each telephone outlet B is provided with a modular jack M, and a general commercially available telephone C can be detachably connected by the modular jack M. Also,
Speaker SP for reproducing the broadcast signal, such as an extension or intercom call sound transmitted through the control line l ₃ This telephone outlet B is provided. The light-emitting display portion La which discriminates a display signal is a voltage signal transmitted through the control line l ₃ for displaying such an extension or external calls, it is provided on the Lb telephone outlet B.

External l ₁ and the extension l ₂ in the telephone exchange A in this telephone switching system, the extension l ₂ between or in the communication path between the extension l ₂ and the telephone line l ₄ and switching formed, external calls, internal call and intercom call thereby enabling, it sends a broadcast signal and a display signal to the telephone outlet B through the control line l ₃ from the telephone exchange a, a speaker SP and a light emitting display La of telephone outlet B, L
The notification and display operation is performed by b.

[Problem to be Solved by the Invention] In the above-described telephone exchange system, conventionally, a telephone C is used to respond to a call made by a door phone of a visitor. However, there is a problem that it is inconvenient to respond to the visit of a family member or an acquaintance by the telephone C each time.

The present invention has been provided in view of the above points,
The sound from the door phone is output from the speaker attached to the telephone outlet, and even if you do not answer with the telephone,
The purpose is to provide a telephone exchange system so that the other party can be confirmed.

[Means for Solving the Problems] The present invention relates to a telephone, comprising: a call detecting means for detecting a call signal from an intercom; and a sound output control means for outputting sound from the intercom from a speaker of a telephone outlet by the call detecting means. It is provided in the exchange.

[Operation] According to the configuration described above, the detection means detects a call signal from the door phone, and outputs the sound from the door phone from the speaker of the telephone outlet according to the detection signal.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. The telephone exchange A of this telephone exchange system will be described.
Telephone exchange A, as shown in FIG. 1, relay contact r ₁ ~r ₃ per telephone outlet B phone C is connected, the hooks · DP (dial pulse) detection circuit 2 ₁ to 2 ₃ and speech current supply provided with a circuit ₄₁ to _3, an incoming detecting circuit 5 for detecting an incoming call from an outside line l _1, DP generator 6 for generating a DP for performing outside line calling, PB (push button) for performing dial PB dialer 7, outside line tone detection circuit 8 for detecting outside line tone, hold tone sending circuit 9 for sending hold tone, cross point switch 10 for setting communication route, PB receiver 12 for receiving PB signal on AC coupling route , 13, a diode bridge DB, gates G _{1 to} G ₃ , and a control circuit 11 composed of a CPU for controlling transmission of a control information signal of each of the above-described circuits and a circuit to be described later and performing signal determination processing.

In the telephone exchange A, the telephone C can communicate with the two intercoms D. Therefore, the intercom call detection circuits 14 ₁ and 14 ₂ for detecting a call from the intercom D are provided. And a door phone communication circuit 15. It should be noted that a security device and an emergency push button can be further connected to the telephone exchange A. Therefore, when a security signal is input or when the emergency push button is pressed, a speaker SP of the telephone outlet B is used. The beeper sounds. In addition, when a security signal is input or an emergency push button is pressed, a notification sound is emitted from the telephone outlet B to which each telephone C is connected. Therefore, the security signal detection circuit 16 generates various notification sounds. sound generating circuit 17, an amplifier aMP ₁ ~AMP _4. In addition, a display control circuit 18 is provided to display the state of the outside line call and the inside line call at the telephone outlet B.

The operation of the telephone exchange system will be described. In the telephone exchange A, when the power is turned on and the system starts, first, the control circuit 11 including a one-chip microcomputer performs an initial setting, then enters a standby state, determines off-hook, and determines whether there is an incoming external line. Judgment and outside line call processing, judgment of the presence / absence of intercom call and intercom call processing, judgment of the presence / absence of extension call, extension call processing, external line call processing, etc. are performed.

Now, when the handset of the telephone C connected to any telephone outlet B is lifted, the hook / DP detection circuit 2 detects off-hook and outputs a detection signal to the control circuit 11. In the above state, the relay contacts r _{1 to} r ₃ are switched to the cross point switch 10 side. At this time, the control circuit 11 is a cross-point switch 10 a pseudo calling signal consisting of 400Hz by turning on a predetermined switch of the cross point switch 10 through the gate G ₃ to the telephone outlet B
And sending through the extension l _2. At the same time, the control circuit 11
Controls the display control circuit 18 to output a voltage signal for turning on the light-emitting display unit La for outside-line busy display at each telephone outlet B to turn on the light-emitting display unit La. At this time, the light-emitting display unit Lb is controlled to be turned off.

This transmission continues until the dial signal is input, and when the first dial signal is detected by the hook / DP detection circuit 2,
The control circuit 11 stops outputting the pseudo transmission signal and stores the dial data in the built-in buffer memory. And built-in 3
Activate the second timer. If the second dial signal is detected during the operation of this timer, it is determined that an outside line call has been made. If the second dial signal is not input within three seconds, it is determined that the call is an extension call, and the extension call processing is performed.

Now, in the case of an outside line call, the data of the dial signal inputted subsequently to the buffer memory is sequentially stored and a signal for operating the DC closing circuit 3 is output. When the line is closed by the DC closing circuit 3, the outside line tone detection circuit 8 detects the outside line tone, and the detection signal is sent to the control circuit 11.
It is input to the control circuit 11 sequentially reads from the first dial data stored in the buffer memory, and sends the sequential dialing signals to operate the dial pulse generating circuit 6 to the external line l _1. Thus at the same time stores the dial data from the phone C in the buffer memory and sending a dial signal to the external line l ₁ in. When the dial data stored in the buffer memory is exhausted and a certain period of time has elapsed, the operation shifts to an external call. Note that interrupts the circuit closing when sending a dial signal to the outside line l _1.

Thereafter, external calls is coupling transformer T, the cross point switch 10, takes place via the extension l _2.

Next, the operation at the time of calling an extension will be described. First, the telephone C connected to the telephone outlet B with the first dial signal
If the next dial signal is not input within 3 seconds after the pseudo dialing signal is output and the pseudo dialing signal is output, the input dial data is determined to be an extension number, and the control circuit 11 turns off the hook from the off-hook state. turns off the predetermined switch point switch 10, along with disconnect the external line l _1, to turn on another predetermined switch so as to set the speech path to extension l _2. Then, the light-emitting display unit La of each telephone outlet B, which was turned on from off-hook, is turned off, and at the same time, a voltage signal for turning on the light-emitting display unit Lb indicating that the extension is busy is output from the display control circuit 18, and the light-emitting display unit Lb Light. Further, the control circuit 11 controls the sound generation circuit 17 to output a notification signal for calling an extension. The broadcast signal is superimposed sent to the control line l ₃ of telephone outlet B of the caller through the further switch of the cross point switch 10. Control line l ₃
Speaker SP at telephone outlet B sent via
A more internal ringing tone sounds.

When the handset of telephone C connected to telephone outlet B is picked up by this sound, hook DP
The detection circuit 2 detects this off-hook and sends a detection signal to the control circuit 11. The control circuit 11 stops the generation of the audio signal based on the off-hook, further turns on the other switches of the cross point switch 10, extension l ₁ and called side telephone telephone outlet B of performing a call the call state and connects the extension l ₂ outlets B.
Thereafter, extension calls are performed. In the case of a simultaneous call, a ringing tone is emitted from the speaker SP of each telephone outlet B. In this general call, the specified dial signal is transmitted to the telephone C.
And input.

Next, an incoming call from an outside line will be described. First, when the incoming signal from the external line l ₁ is input, the incoming signal is an incoming call detection circuit 5 detects and outputs an incoming call detection signal to the control circuit 11.
The control circuit 11 when the incoming call detection signal is inputted, switches the relay contacts r external line l ₁ side. Thus, telephone C connected to each telephone outlet B is connected to the external line l ₁ through extension l _2, so that the internal bell sounding in each phone C. When the handset of the telephone C connected to the telephone outlet B is raised by the ringing, the off-hook state is detected by the hook / DP detection circuit 2 and the detection output causes the control circuit 11 to turn on the DC closing circuit 3. ,
At the same time switching the cross point switch 10, to enable external call to connect the extension l ₂ of the telephone outlet B which is connected to the phone C that is outside line l ₁ and off-hook.

By the way, when the user wants to make an extension call during the above-mentioned outside line call or wants to make a door phone call, the call can be put on hold.

First, when the handset of the telephone C is not on-hook and a dial signal corresponding to the hold, for example, "0" is sent from the telephone C in advance in a DC closed state during an external call, the control circuit 11 transmits the dial data. read it is determined that the hold operation, performs hold processing to release the communication path between the extension l ₂ and external l _1. Then, by operating the holding tone generating circuit 9 by switching the cross point switch 10, the external line l ₁ a holding tone melody signal through a coupling transformer T and amplifier AM
P _4, the cross point switch 10, and sends to the control line l ₃ through an amplifier AMP ₁ ~AMP _3. Further, the control circuit emitting display unit from the display control circuit 18 under the control of 11 La, Lb simultaneously lighted to each telephone outlet a voltage signal via the control line l ₃ B
To turn on the light-emitting display units La and Lb. That know that the holding tone melody signal is pending to the other phones via the outside line l _1, hold the hold melody sound to the user Hatsuna from the speaker SP of telephone outlet B connecting each telephone C simultaneously In addition, the light-emitting display units La and Lb are simultaneously lit to indicate that the operation is suspended.

After the hold, even if the telephone C is hooked on and the communication ends, the DC closing circuit 3 is maintained in the on state, and the operation shifts to a calling operation.

Next, when the user wants to make an outside call again, the hold is released. This hold release is performed by any of the telephones C that went off-hook.
It is sufficient to transmit a dial signal of "0", and the control circuit 11 which has detected the dial data of "0" stops the operation of the hold tone generating unit 9 and controls each unit to the original outside line communication state. . When the call after releasing the hold is terminated and the telephone C in the off-hook state is again on-hook, the DC closing by the DC closing unit 3 is released under the control of the control circuit 11.

When the dial data to be inputted is other than "7" for designating a door phone call after the above-mentioned hold state, an extension call is made to connect the extension number to the telephone outlet by the above-described extension processing. I have.

Hereinafter, a case where a door phone call is made will be described.
When a call is made from one of the doorphones D, a push button provided on the doorphone D is pressed. As shown in this push button is pressed a second view (a), the signal is outputted, the intercom call detection circuit 14 ₁ is operated as shown in FIG. 2 (b) in this signal, controls the detection signal Input to the circuit 11. The control circuit 11 is connected to the doorphone D by turning on the switching element S ₁ to the intercom call circuit 15, at the same time, turns on the cross-point switch 10 corresponding to the control line as shown in FIG. 2 (d), the sound The generation circuit 17 is operated. Then, as shown in FIG. 2 (c), a doorphone ringing sound is output from the speaker SP provided at each telephone outlet B, and FIG.
As shown in (1), intercom broadcasting is enabled. That is, the voice of the operator of the doorphone D is transmitted to the speaker SP of the telephone outlet B.
Is output directly from the terminal, and it is possible to confirm who the other party is without picking up the telephone C.

Here, during the intercom broadcast, the intercom call detection circuit 14
Has a circuit configuration in which the intercom call cannot be detected, and is turned off under the control of the control circuit 11 after a certain period of time.

The call detection means and the voice output control means are constituted by the telephone exchange A.

When the telephone C answers by calling from the door phone D, the following operation is performed. When the household member who hears the ringing tone picks up the handset of one of the telephones C, a signal indicating that the handset has been off-hook from the hook / DP detection circuit 2 of the telephone outlet B to which the handset has been off-hook is sent to the control circuit 11. Then, the control circuit 11 switches the cross point switch 10 to connect the telephone C with the handset off-hook to the door phone communication circuit 15 and to turn on the switch element S provided between the door phone D and the door phone communication circuit 15. To enable intercom calls.

[Effects of the Invention] As described above, the present invention includes a call detecting means for detecting a call signal from an intercom, and a sound output control means for outputting sound from the intercom from a speaker of a telephone outlet by the call detecting means. Since it is provided in the exchange, the detection means detects a call signal from the door phone, and outputs the sound from the door phone from the speaker of the telephone outlet according to the detection signal, so that the telephone does not respond as in the past. It is possible to confirm who is the other party, and to be relieved from the hassle of answering the phone.Also, because it is configured to output the sound from the door phone from the existing speaker, the shape and cost do not change This has the effect of improving the function.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of one embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of the embodiment, and FIG. 3 is a system configuration diagram of a telephone exchange system. A is a telephone exchange, B is a telephone outlet, C is a telephone, D
The door phone, E is the central office, SP a speaker, the 11 control circuits, l ₁ is an outside line, l ₂ is the extension, l ₃ is a control line.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Miyuki Oshinda 1048 Odakadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) Reference Jikken Hei 7-31658 (JP, Y2)

Claims (1)

(57) [Claims] 1. A telephone exchange connected to a telephone office via an external line, and a plurality of telephone outlets connected to the telephone exchange via an extension line and a control line and to which a commercially available telephone is detachably connected. A telephone exchange changes the communication path between an external line and an internal line or between internal lines so that external telephone calls and internal telephone calls can be made with the above-mentioned telephone, and a signal for reporting to a telephone outlet provided with a speaker from the telephone exchange via a control line. In a telephone exchange system that enables intercom calls between a doorphone installed outside the home and the telephone, a call detection unit that detects a call signal from the intercom is sent. And voice output control means for outputting voice from the intercom from the speaker of the telephone outlet by the call detection means. Telephone switching system, characterized in that provided on the machine.