JPH0122797B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a button telephone device that enables dialing from a telephone office to a central office line while on-hook.

[Prior art]

In a button telephone device consisting of a main device that accommodates a central office line from a telephone office and a plurality of key telephones (hereinafter referred to as telephones), there is an on-hook system that allows dialing to the central office line even when the telephone is on-hook. The hook dialing method is generally adopted and makes dialing a simple operation, but conventionally, when performing on-hook dialing, if you perform an operation to capture the central office line on the telephone, the telephone will not be able to dial unless off-hook and on-hook are performed. The station line remained in the state of acquisition, and due to operational lapses, etc.
This had the disadvantage that it was impossible to make and receive calls via the central office line.

[Summary of the invention]

The purpose of the present invention is to fundamentally solve such drawbacks of the conventional technology, and to provide an on-hook dialing mode in which a central office line can be picked up by a specific operation of the button telephone in the on-hook state, and dialing can be made while the telephone is in the on-hook state. A button telephone device comprising: off-hook detection means for detecting off-hook of the button telephone; a timer that starts when a central office line is captured in on-hook dial mode and is stopped by a detection output of the off-hook detection means; To provide a button telephone device, which is equipped with a mode control means for canceling the on-hook dial mode and opening the central office line by a time-up output, and automatically canceling the on-hook dial mode for a certain period of time or more. A dial operation detection means for detecting a dial operation on the telephone, a timer that starts when a central office line is detected in on-hook dial mode and is stopped by the detection output of the dial operation detection means, and a timer that is stopped by the time-up output of this timer. mode control means for canceling the on-hook dial mode and opening the central office line,
To provide a button telephone device which automatically cancels an on-hook dial mode when there is no dial operation for a certain period of time or more.

〔Example〕

Hereinafter, details of the present invention will be explained with reference to figures showing examples.

Figure 1 is a block diagram showing the configuration, and the main device
The ME is provided with line terminals L ₁ and _{L 2} to which _the central office line from the telephone office is connected and accommodated. They are connected by a pair of communication lines LT and signal lines LS, and normally the relay L of the main device ME and the relays TK of the telephones TEL ₁ to _{TEL o} operate, and the contacts l ¹ ,
The telephone line LT is connected to the secondary winding of the transformer Tm by l ² , and the telephone power supply VB is supplied through the circuit of the resistor R _B and the capacitor C _B. Even if the line between the circuit TKC and the switch HS ¹ is turned on due to off-hook, the communication circuit TKC will not be connected to the communication line LT unless the relay TK is restored.

In addition, the main device ME and telephones TEL ₁ to TEL _o are
Control circuits CTm and CTt consisting of a microprocessor, memory, etc. are provided, and the transmitter/receiver circuit
It sends and receives data via SRm, SRt and signal line LS, exchanging information between each other, and also controls other parts based on information from other parts, and control circuits CTm and CTt. The device is designed to operate under controlled conditions.

Here, if there is an incoming call from the central office line, the incoming call detection circuit RDT using a photocoupler detects the ringing signal via the DC blocking capacitor C _R ,
In order to provide this information to the control circuit CTm, the control circuit CTm starts the oscillator OSCm in response to this,
Sends the central office line ring tone to the telephone line LT via the transformer Tm, transmits control data via the signal line LS, restores the relays TK of telephones TEL ₁ to TEL _o , and operates the relay SP at the same time. Let, and
Turn on amplifier A and turn on the key/display circuit.
By blinking the KDP office line indicator light, the office line ringing tone via contacts sp ¹ , sp ² , tk and transformer Tt is amplified by amplifier A and given to speaker SPK, which rings to alert the office line. The incoming call is notified by the blinking of the office line indicator light.

In response, for example, the telephone TEL ₁ responds,
When you operate the central line key of the key/display circuit KDP along with the off-hook, this information is transferred to the key/display circuit.
Control circuit from KDP and switch HS ²
CTt, control circuit via signal line LS
Since it is sent to CTm as operation data, control circuit CTm restores relay L in response to this,
The telephone line LT is connected to the central office line by contacts l ¹ and l ² as central office line connection means, while all telephones TEL ₁
~ Send control data for TEL _o , restore these relays SP, and connect the communication circuit TKC to the communication line
At the same time as disconnecting from the LT, the station line indicator light is turned on, thereby indicating that a call to the station line is in progress.

In the telephone TEL ₁ , the telephone circuit TKC is connected to the telephone line LT by the turned on switch ^HS1 and the contact tk which is being restored, and a telephone conversation with the central office line is performed.

In addition, when performing a hold transfer, operate the hold key on the key/display circuit KDP and specify the transfer destination using the pushbutton dial PD. This operation data is given to the control circuit CTm, and the The same circuit CTm operates the relay HL, turns on the contact hl of the hold circuit HLD, and the hold resistor R _L
closes the hold loop and the phone
Sends control data to TEL ₁ to TEL _o , flashes the office line indicator light, sends control data to the forwarding destination phone, operates relay SP, restores relay TK, and , amplifier A
is turned on, while operating relay L, and
In order to start the oscillator OSCm, the speaker SPK of the transfer destination telephone rings with the central office line ringtone.

When the transfer destination telephone goes off-hook in response to this, a call is made between the extensions, and if the central office line key is then operated, a call is made to the central office line in the same manner as described above, while the operation data of the central office line key is is the control circuit
The holding loop is released because the circuit CTm restores the relay HL.

When the call ends and on-hook is performed, this operation data is given to the control circuit CTm, and in response to this, the circuit CTm operates the relay L to open the central office line and send the telephones TEL ₁ to TEL _o . It sends control data to the station, activates relay TK, and turns off the office line indicator light to enter the standby state.

Then, for example, when making a call to a central office line from telephone TEL ₁ , when the off-hook and central line keys are operated on telephone TEL ₁ , these operation data are given to the control circuit CTm, and the circuit is activated accordingly. CTm restores relay L,
While connecting the telephone line LT to the central office line,
Send control data to TEL ₁ and relay TK
and connects the communication circuit TKC to the communication line LT, and also transmits control data to all telephones TEL ₁ to _{TEL o} to turn on their office line indicator lights.

Therefore, a display indicating that the office line is in use is displayed, the telephone call circuit TKC is connected to the office line, and the dial pulse generating circuit DPG operates in response to the operation of the pushbutton dial PD. Since the switch is turned on and off, dialing to the central office line can be made freely, and the call is completed when the other party responds.

In addition, if on-husk is performed due to the end of the episode,
The system enters the standby state as described above, and hold transfer is performed in the same manner as above, but when making a call, if the central office line key is operated before going off-hook, the operation data of the central office line key will be transferred by the control circuit CTm even in the on-hook state. is detected, and in response to this, relay L is restored, control data is sent to telephone TEL ₁ , relay SP is operated and relay TK is restored, and the contact point as a dial connection means is detected.
Turn on tk and sp ¹ , and use the telephone circuit TKC including the dialing switch as the dialing circuit.
Since it is connected to the LT, on-hook dialing is possible, and the other party's responses can be freely heard through the speaker SPK while on-hook.

In addition, when you operate the push button dial PD,
As a result, the control circuit CTt responds and the oscillation circuit
In order to activate OSCt and turn on amplifier A, an operation sound is sent from speaker SPK.

In addition, for inter-extension calls, e.g.
With off-hook at TEL ₁ , telephone TEL ₂
When a dial operation is performed to specify , the operation data is given to the control circuit CTm, and in response, the circuit CTm operates the oscillator OSCm for a certain period of time and sends control data to the telephones TEL ₁ and TEL ₂ . In addition to restoring the relay TK of both parties, the relay SP of the telephone TEL ₂ was activated, and
In order to turn on amplifier A, the extension incoming warning sound is sent from the speaker SPK of telephone TEL ₂ for a certain period of time, and then the ringing sound from telephone TEL ₁ is output to the telephone.
Sent from TEL ₂ speaker SPK.

If telephone TEL ₂ answers by off-hook,
According to the operation data of this, control circuit CTm transmits control data to telephone TEL ₂ , and relay SP
In order to restore the communication, the two parties enter a telephone conversation state, and when an on-hook is performed due to the end of the call, the control circuit CTm sends control data to both parties according to the operation data, operates relay TK, and enters the standby state. shall be.

In addition, if you receive a call from the doorphone DP,
The control circuit CTm detects this via the doorbell control circuit DPC, starts the oscillator OSCm, and transmits control data to the telephones TEL ₁ to _{TEL o} ,
In order to restore the relay TK, operate the relay SP, and turn on the amplifier, a doorbell ring tone is sent from the speaker SPK. If any telephone goes off-hook in response to this, the operation data of this Control circuit CTm is oscillation circuit OSCm
stops and controls the door phone control circuit DPC, connects the door phone DP to the primary winding of the transformer Tm, transmits control data, and restores the relay SP while leaving the relay TK of the off-hook telephone in the recovery state. By turning off amplifier A and putting the other telephones into standby mode, a call is made between the door phone DP and the off-hook telephone, and when the telephone goes on-hook, the entire system returns to the standby state in the same manner as described above. Become.

Please note that the doorbell is not activated during a call to the central office or extension line.
If there is an incoming call from the DP, or if there is an incoming call from the central office line during a call between extensions, the control circuit
CTm sends control data to start the oscillator OSCt and turn on amplifier A, so the speaker
The SPK is designed to send out a doorbell ringtone during a call or a central office line ringtone during an extension call.

FIG. 2 is a flowchart of a call operation to a central office line based on the control of the control circuit CTm. For example, when the central office line key "LK operation" of telephone TEL ₁ in an on-hook state is performed, the operation data of this is transmitted to the central office line by the control circuit CTm. When the station line is received, it is checked against the contents of the memory to determine whether the station line is in an idle state or “standby mode?” If this is N (ON), the process moves to “other processing” and the station line Processing to respond to incoming calls, on hold, etc., or disabling "LK operation" assuming a call is in progress, but if the judgment result is Y (YES), relay "L recovery" is performed. Then, each control data is sent sequentially to the telephone TEL ₁ , and the relay “TK recovery” and relay “SP
After turning on the amplifier "A on" and making it possible to make a dial call by capturing the central office line, transmit control data to the telephones TEL ₁ to TEL _o ,
Each station line indicator light is turned on.

Then, it is configured in the control circuit CTm.
"Timer start" is performed for a timer having a set time such as 30 seconds, and the control circuit CTm as an off-hook detection means receives operation data indicating off-hook of telephone TEL ₁ and asks "off-hook?"
If becomes Y, control data is sent to telephone TEL ₁ , relay “SP recovery”, amplifier “A off”
After the call is completed, the timer is stopped, the call is made, and the phone is turned off when the call ends.
When the operation data indicating on-hook is received from TEL ₁ and “On-hook?” becomes Y, the relay “L operation” is activated.
After doing so, transmit control data to telephone TEL ₁ to perform relay "TK operation", then transmit control data to telephones TEL ₁ to TEL _o , and display each "office line display". The lights are turned off, the station line is released, and the station goes into standby mode.

In addition, when the "off hook?" after "timer start" is N, the central office line key is operated again.
If the central line key “LK operation?” becomes Y, the relay “SP recovery” and amplifier “A off” are activated as described above.
is carried out, the relay moves to “L operation” and later, and the station line is opened, but under the condition that the station line key “LK operation?” is N, “Timer time up?” is Y.
If so, immediately proceed to the relay “SP recovery” or later and release the central office line.

Therefore, the central office line can be acquired only by operating the central office line key, and dialing can be made even in the on-hook state, making the on-hook dialing operation simple and easy.

In addition, if you do not go on-hook and operate the central office line key again while the central office line is captured by operating the central office line key, the central office line acquisition state will be automatically released when the timer times up, and the central office line will remain in the locked state. be prevented from being done.

FIG. 3 is a flowchart similar to FIG. 2 corresponding to the second invention, in which the central line key "LK operation?"
The steps up to the Y side are the same as in Figure 2, but in response to N for "LK operation?", the process goes through Y for "Timer running?" to "Timer time up?"
During this time, the pushbutton dial PD of telephone TEL ₁ is operated and a dial call is made, and the control circuit CTm serving as a dial detection means receives and detects the operation data, and the "Dial operation?" If Y, “timer stop”
is performed, and returns to "Off-hook?", and then "Off-hook?" is N, "LK operation?" is N, and "Timer is running?" until "Off-hook?" and "LK operation?" become Y. The routine that goes through N is repeated.

Therefore, if you do not make a dial call while the central office line is acquired by operating the central office line key, the central office line acquisition state will be automatically released when the timer times up, but even if you dial the Because "timer stop" is performed, when listening to weather forecasts, time signals, etc. on the speaker SPK while the on-foot dial is on,
There is no possibility that the call receiving state will be disconnected due to time-up of the timer.

However, in Figure 1, each telephone TEL ₁ ~
The TEL _o and the main device ME may be connected by individual communication lines and signal lines, and the same is true even if multiple office lines are accommodated in the main device ME, instead of the dial pulse generator DPG. Various modifications are possible, such as providing a dial signal generation circuit in the system and transmitting a dial signal using a composite frequency.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, if no off-hook or dialing is performed after the central office line is acquired, the central office line acquisition state is automatically canceled after a certain period of time. Continuation of the line capture state is prevented, and a remarkable effect can be obtained in various key telephone devices.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a block diagram showing the configuration, and FIGS. 2 and 3 are flowcharts of the calling operation for the central office line. ME...Main equipment, TEL ₁ ~ TEL _o ...Telephone (button phone), L ₁ , L ₂ ...Line terminal, LT...Talking line, LS...Signal line, CTm, CTt...Control circuit, SRm , SRt...transmission/reception circuit, L, TK, SP...
…Relay, KDP…key/display circuit, PD…push button dial, DPG…dial pulse generation circuit.

Claims (1)

[Scope of Claims] 1. In a key telephone device equipped with an on-hook dialing mode that allows a central office line to be picked up by a specific operation of the key telephone in an on-hook state and dialing can be made while the key telephone is in an on-hook state, an off-hook of the key telephone is detected. a timer that starts when a central office line is detected in the on-hook dial mode and is stopped by the detection output of the off-hook detection means; 1. A button telephone device, comprising mode control means for releasing the central office line by releasing the telephone line, and automatically canceling the on-hook dialing mode for a certain period of time or more. 2. In a key telephone device equipped with an on-hook dialing mode in which a specific operation of the key telephone in an on-hook state allows a central office line to be picked up and dialing can be made while the key telephone is in an on-hook state, a dial operation detection means for detecting a dial operation on the key telephone. and a timer that starts when a central office line is detected in the on-hook dial mode and is stopped by the detection output of the dial operation detection means, and the on-hook dial mode is canceled by the time-up output of this timer. 1. A button telephone device, comprising mode control means for opening a central office line, and automatically canceling an on-hook dialing mode if there is no dialing operation for a certain period of time or more.