JPS6150489A - Key telephone system - Google Patents

Abstract

PURPOSE:To obtain a key telephone system which is economical from a viewpoint of facility investment by connecting a standard telephone set as a slave machine to a main device of a key telephone system by a pair of call lines only and adding a call signal sending function, detecting function, etc., of closing a direct current loop circuit to the main device. CONSTITUTION:Main wires 1a and 1b from a central telephone exchange are contained to a main device 2, and the main wires 1a and 1b are replaced and connected to main wire circuits 3a and 3b which have a function to detect a call signal of 16Hz, a dial originating function, etc., and through a replacing and connecting circuit 5 slave machines 7a-7d connected by each pair of signal lines 6a-6d. Respective links 4a-4c are extended to a two-wire system unit 21 and replaces and connects through the unit 21 with standard telephone sets 22a and 22b connected by each pair of call lines 6e and 6f. However, in this case, an automatic answering telephone set is used as either of telephone sets 22a and 22b or both sets.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a key telephone device which can be freely accommodated as an answering machine and a handset.

[Prior art]

In recent years, key telephone devices have tended to be widely used in offices, stores, homes, etc., and answering machines I (hereinafter referred to as answering machines) have also become increasingly popular. Between the machine? The answering device! The i is designed to be attached to a standard telephone set for general subscribers.
．． Since it is manufactured for use on two-wire lines, it is impossible to use the answering machine sound as a handset for a key telephone device.

For this reason, when installing a key telephone device and an answering device, it is necessary to connect the answering device in parallel to the central office line housed in the main device of the key telephone device, or to use a switching device. The central office line is selectively connected to either the main device or the answering device, and in the case of the former, there is a risk that the answering device will respond at times other than necessary and cause interference to calls. On the other hand, in the latter case, if the changeover switch is operated incorrectly, a defective sound will be generated that will make it impossible to make or receive calls via the main device, and in either case wJPj! Special construction work is required on the side, and an answering device must be installed in correspondence with the central office line, resulting in disadvantageous noise such as being uneconomical in terms of equipment investment.

[Summary of the invention]

The present invention has the purpose of fundamentally solving all the drawbacks of the conventional key telephone device, and connects a standard telephone as a handset to the main device of a key telephone device by only one pair of communication lines, and also has a function for sending out a ringing signal. In addition to adding functions such as detecting DC loop circuit closure to the main device, it is connected to the terminal side of the telephone line on an answering machine that also functions as a standard telephone, and responds to incoming calls from the central office line. To provide an extremely effective key telephone device which makes all calls to an answering machine and connects a telephone line to an incoming central office line in accordance with the response of the answering machine.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

FIG. 1 is a block diagram of the entire configuration, in which the central office lines 1a and Ib from the telephone office are accommodated in the main device 2, and the curve 1
Does a and Ib have a function to detect all 16Hz calling signals and a dialing function? Office line circuits 3a, 3b,
Also, the exchange connection circuit 5? The subunits 7a to 7d are exchange-connected via the terminals 7a to 7d connected to each pair of signal lines 6a to 6d.

The switching connection circuit 5 is provided with the office line links 4a, 4b, the extension link 4c, and the tone link 4d', and the extension link 4c connects the handsets 7a to 7d with each other. An extension call is made by supplying telephone power, and the extension circuit 8 and the doorphone circuit 9 are connected to each other.
A call is also made to the door phone 10 via the 0. Tone Various tone signals from the tone generation circuit 11 are sent to the handset 7a via the l link 4dTh.
7d, while a similar tone signal is sent to the door phone 10 via the door phone circuit 9, and is used for mutual calling, notification of alarms, etc.

Each of the links 4a to 4c is extended to a two-wire (hereinafter referred to as 2W) unit 21, and a standard telephone set (hereinafter referred to as a telephone set) is connected via the same unit 21 by a pair of communication lines 6e and 6f. ) 22a and 22b.

However, in this case, call a! An answering device, which will be described later, is used as one or both of 22a and 22b.

On the other hand, a control section 31 consisting of a microprocessor, memory, etc. is provided, and transmits and receives control data to and from the handsets 78 to 1d through the transmission/reception circuit 32 and each pair of signal lines 33a to 33d. All control decisions are made based on the operation data indicating the operating status from 7d and the detection power from each part, and based on this, control data is sent to all slave units 78 to 7d, and all parts are control and general control.

The above configuration and operation are described in the "Key Telephone Device" (Japanese Patent Application No. 57-201987) filed separately by the present applicant.
Details are disclosed in JP-A-59-92694).

On the other hand, in FIG. 1, the one shown in FIG. 2 is used as the 2W unit 21, and a switch unit as a switching means connects each jumper of the office line 1a and the communication line 6e to the terminals 41a and 41b. 42 is self-removable, and when all of them are installed, the jumper and terminal 41
After cutting off all the jumper wires of each jumper wire 1a and 41b, and operating the switch in the switch unit 42, the central line 1a (I
II office line circuit 3a, office line link 4a, 2W unit 2
The circuit in the central office line 1a is disconnected, the telephone 22a is directly connected to the central office line 1a, and the ringing signal detection function in the central office line circuit 3a is accordingly stopped.

Figure 2 is a circuit diagram of the 2W unit 21 69, magnetic holding type latching relays XC5, XC6, XS5, XS6
and relay XI5. XI6. SRI.

Each contact of SR2 xc5'', xc52-sr]1.
The communication lines 6e, 6f and each link 4a to 4C are exchange-connected via the sr12f, and these constitute an exchange connection circuit, and the 16 Hz The ringing signal (RIGI), (RIG2) is connected from the ringing signal generator 51 through the resistors R28, R29' (+- to the communication lines 6e, 6f).
On the other hand, when each relay is restored, resistors R9, R33, and R34 are connected to communication lines 6e and 6f.
A loop current is supplied from the power supply +24V through the capacitor C1l (I-), and the midtone from the tone signal generator 52 is superimposed on the loop current and sent out.

In addition, relay XI5. Due to the operation of XI6, the communication line 6e
, 6f are connected to the tone link 4C, a ringing tone from the tone signal generator 52 is transmitted.

According to the control signal 61 from the control section 31, the calling signal generator 51 varies the intermittent cycle of the calling signal to be sent, for example, as shown in the following table.

Furthermore, the sound output from the tone signal generator 52 is controlled by control data from the control section 31 via a data bus 62, and a latch circuit is connected to the output side in response to a 2-bit selection signal 63 given from the control section 31. All built-in selectors 5
3 selects all outputs PC4 to PC6, human power D4 to D
All data output PC4 according to the control data given to PC6
~Is this to be sent from PC6? Inverter 54a~
54c inverted signals (DBT2), (RBT),
(DBTI), the transmission and intermittent cycles of each transmission sound are controlled.

Note that the selector 53 receives the chit from the control unit 31.
In order to respond to the 1G select signal 64, select all three sets of outputs PAO-PA7, PBO-PB7, and PCO-PC7 according to the bit combination of the selection signal 63, and send the data of the corresponding input Do-D7. , In response to this, data for driving each relay +- is sent, and inverters 55a to 55d, 56a to 56h'
-L'' (low level) signal (XC5S), (
XC5R) ~ (XS6S), (XS6R).

(XI 5 ) ~ (SR2), and the signal (XI 5
) to (SR2) to operate the relays X15 to SRZ, respectively, and the signals (XC5S) and (XC6S).

(XS5S), (XS6S) A signal (XC5R) that energizes the operating windings P of the latching relays XC5 to XS6 and causes them to maintain their respective operations.

(X06R), (XS5R), and (XS6R) energize these restoration windings S to restore all the held ones.

On the other hand, parallel circuits of resistors R37 and R38, photocouplers PC2 and light emitting diodes of PO2, and series circuits of resistors R39 and R40 are inserted into the - lines of the communication lines 6o and 6f, respectively, and the communication lines 6e , 6f
A light emitting diode emits light according to the loop current that flows when the DC loop circuit is closed on the terminal side of the
The light-receiving transistors of the photocouplers PC2 and PO2 receive this light emission and completely lower the impedance, thereby detecting the complete closure of the DC loop circuit.

That is, +5V is applied to the collector of each light-receiving transistor through resistors R48 and R49Th, and 1V is normally applied to the collector of each light-receiving transistor.
Although it is H# (high level), the impedance between the collector and emitter decreases as the loop current flows.
The collector voltage becomes SL", and this is the total detecting power (LPi
), (LP2), so this is inverted by inverters 57a and 57b having full Schmitt trigger characteristics, and is connected to the data bus via buffer gate 59, which is turned on according to chip select signal 65 from control unit 31 via buffer 58. 62, and is sent to the control unit 31 at a timing different from that of the above-mentioned control data.

Note that the resistors R37 and R38 are each connected to a constant voltage diode ZD4. ZD5 and diodes D3 and D4 are connected in parallel to keep the voltage applied to the light emitting diode circuit constant and to bypass current flowing in the opposite direction.

In addition, the office line links 4a, 4b K are inserted into the diode IJ pipes 71a, 71b, respectively, and the polarity of the voltage applied from the exchange to the office lines 1a, lb (1) depends on the response of the other party. Even when reversed, the polarity applied to the communication lines 6e and 6f remains constant.

FIG. 3 shows a circuit diagram of a switch unit 420, in which a switch Ka having four sets of transfer contacts is provided.
Main poles 2 and 5 go to the office line 1a side, break poles 3 and 6 go to the office line circuit 3a side, main poles 8 and 11 go to the communication line 6e side, break poles 9 and 12 go to the 2W unit 211Ill, and the respective connectors Connected through CN'Th and make pole 1 and T
, 4 and 10 are commonly connected, and in the state shown, the station M1a is connected to the office line circuit 3a, and the communication line 6
e is connected to the Yukari unit 21, but the switch Ka
By this operation, the office line circuit 3a to the 2W unit 21 are disconnected, and the office line 1a and the communication line 6e are directly connected to each other, so that they have no relation to the earthenware [2].

FIG. 4 shows a block Ctt of an answering machine connected to the terminal side of the communication lines 6e and 6f, 111 is a communication circuit, 112
is a handset, and is connected to the line terminal LK* via a hook switch H81t- for making a telephone call. Also, 11
Reference numeral 3 denotes a tone ringer circuit, and 114 a speaker for notifying the incoming call.As will be described later, even when the answering mode is set, the handset can be used for off-hook calls.

On the other hand, 115 is a regenerative amplifier, 116 is a reproducing head, and 11
1 is a cassette deck for response message (OGM), and is connected to the line terminal LK through the line transformer 118, the hybrid circuit 119, and the contact ai which is closed by the operation of the relay A, and the analog switch 121 is in the ON state. At the time, the mouth was recorded on 7t tape.
Regenerate and send to OGM' line terminal IL. Similarly K122U recording amplifier, 123 is bell tone, playback head, 124 is message message (ICM)
The cassette deck is connected to the line terminal, and when the analog switch 125 is in the ON state, the ICMt arriving at the line terminal is recorded. Furthermore, if the analog switch 126t is turned on and the deck 124 is operated for reproduction, the speaker 12 is output via the monitor amplifier 127.
8, you can also listen to the recorded ICM'.

The operation of each analog switch 121, 125, 126 and relay A is controlled by a control circuit 129K. That is, the control circuit 129 consists of a microprocessor, memory, etc., and when the answering mode is set by operating the answering switch SWI, when an incoming call is detected by the incoming call detection circuit 130, relay A' is activated.
and each deck 11T via the deck controller 131.

124-karat gold control and predetermined operation? Let them do it. When a predetermined remote control signal is detected by the remote control signal detection circuit 132, all predetermined operations are performed correspondingly (or even when a specific hook state is detected by S2).

On the other hand, if the switch SWI is not operated, it goes into home mode and only functions as a telephone. will be presented.

In addition, depending on the operation of the bell sound and playback button 141, forced recording and playback control is performed on the cassette decks 117 and 124, while the dial key 14
In response to the operation No. 2, the dial circuit 143 responds and sends out a dial pulse.

The above configuration and operation are described in the "Functional Telephone" (Japanese Patent Application No. 59-98614) filed separately by the present applicant.
) details are disclosed.

Therefore, if the answering devices 22a, 22b'tl in FIG. Outgoing calls to 1b and central office lines 1a, 1
You can freely answer incoming calls from ``b'' and make extension calls.

When making a call to the central office lines 1m and 1b, for example, by dialing "0" after going off-hook, an empty central office line 1a and 1b will be automatically selected and exchanged and connected. Calls to slave units 7a-7d are
After going off-hook, a P-conversion connection is established by dialing the entire number of the handset.

Mayu, incoming call from station @la, lb, station line circuit 3
The ringing signal generator 51 is controlled in response to the detection of the ringing signal by the stations 1i) and 3b, and a ringing signal equivalent to the ringing signal from the stations 1i)Ia and 1b is sent to the communication lines 6e and 6f. 113 operates and causes the speaker 114 to vibrate, and when off-hook is performed in response to this, the DC loop circuit is closed, and according to the detection power detected by the photocouplers PC2 and PCB, the incoming station line An exchange connection is made to 1a and 1b, and the answering call becomes the responsibility of the user.

In addition, the dial pulse when making a call is generated by the photocoupler PC2.
, PO2 is detected by the total disconnection control unit 31, and a friend exchange connection is performed according to the number of disconnections.

Also, when receiving a call from the central office line 1a or Ib, the handset 7a-
7d is also called, and the one that responds first is connected preferentially to the central office lines 1a and 1b, which are currently receiving 51 calls.

In addition, when an incoming call is received from the built-in call or the mine door phone 10, the speaker 114 sounds as described above and r8J in response to the calling signal from the calling signal generator 51. The answering call will be made by the caller.

Regarding the above, if all operators are absent, switch SWI
Yoji house sitting mode? If you set it up, answering device 2
2a and 22b function as answering machines, and the incoming call detection circuit 1 responds to the incoming calls from the central office lines 1a and 1b in accordance with the ringing signals from the ringing signal generators 51 and 51p.
30 detects all of this and sets the answering machine [22a and 22b respond, turning on contact a □. 2-a. Eka, oh. ,. Engineering,. 1, it is converted and connected to the incoming stations 111a and 1b, and all OGM transmission and ICM recording are performed.

Therefore, all the station lines 1a are connected to each other by the answering devices 22a and 22b
, 1b can be answered freely, and even if there are duplicate calls from each of the central office lines 1a and 1b, an answer will be sent to each call individually.

Note that the same applies to incoming calls from the door phone 10, so it is possible to freely respond to calls from the US defense personnel.

Instead of using two answering machines 22a and 22b, one of them may be used as an answering machine and the other as all telephones. For example, in the case of a store that also serves as a residence, the central office line 1a
'z Dedicated to the store, station IJIb is designated as shared between the residence and the store, all answering devices 22a are connected to the telephone line 6e, all telephones are connected to the telephone line 6flCfi, and the switch Ka k of the switch unit 42 is operated at the time of closing. If you do, incoming calls from central line 1a will be answered using the answering machine [22
Station 1i1b'
It is possible to make and receive calls via the handsets 7a to 7d and the residential side of the telephone, and the trouble of manually responding to incoming commercial calls after the telephone is closed is eliminated, which is extremely convenient.

In addition, the main device 2 of the answering devices 22a and 22b is connected to the central office line 1a during a power outage because the main device 2 circulates around the commercial power source.

It is connected directly to 1b, and can also be used as a slave unit for power outages.

Furthermore, since the answering machines 122a and 22b also respond to incoming extension calls, the telephone lines 6e and 6f are connected to the handset 7.
This is convenient when the structure is constructed to a part separated from a-7d.

Note that the control section 31 provides a p.p.
It is done as follows.

That is, the processor in the control unit 31 controls the central office line 1a,
1b status, slave units 7a to 7d status, answering machine 22a,
22b, the status of the exchange connection circuit 5, and the status of the 2W unit 21 are sequentially stored in the memory in the control unit 31, and all these data are checked to control the exchange connection circuit 5 and the 2W unit 21. The 2W unit 21 is activated in response to data in the memory indicating incoming calls from the central office lines 1a and 1b and data detected as a complete closure of the DC loop circuit in response to the answering devices 22a and 22b.
The relay to be driven inside is determined, control data is sent to the data bus 62 in accordance with this, and all exchange connections are made.

However, the answering machines FT22a and 22b are not limited to the one shown in FIG. 4, and may be a combination of a telephone and a normal answering machine, and can be connected to the central office lines 1a, 1b and the telephone line 6e.
The number of lines such as , 6f, etc. can be selected arbitrarily according to the situation, and the switch unit 42 can be installed according to the number of answering devices to be directly connected to the central office line.
The configuration of the diagram can be arbitrarily selected according to the conditions, etc.
Various transformations are possible.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, an answering machine can be freely accommodated as a handset of a key telephone device,
In addition to eliminating the need for special construction, answering for all telephone lines can be answered without having to install an answering machine for multiple telephone lines, making it economical in terms of equipment investment, and is a prominent feature in various button telephone devices. Effects can be obtained.

[Brief explanation of drawings]

The figures show all the embodiments of the present invention, Fig. 1 is a block diagram of the entire configuration, Fig. 2 is a circuit diagram of the 2W unit, Fig. 3 is a circuit diagram of the switch unit, and Fig. 4 is a block diagram of the answering device. Ruru. 1a, 1b...Central/central line, 2...Main device, 3a
, 3b...office line circuit, 5...exchange connection circuit, 68-6f...talk line, 7a-7d...
- Akako machine, 2l---2W unit, 22a. 22b...Answering machine (answering machine), 31.
...Fist control unit, 41a, 41b...-jumper one terminal, 42-...war switch unit, 51...Call A No. 8 generator, XC5, XC6. XS5. XS6・Φ・・Latching relay, XI5゜X
I6. SRI, SR2, A・
・ ・ ・ ri -, xc5'xs6,
xc6, srl, srl, sr
2. sr2, xi5, xj5, xi6, x
i6. Q--#-Relay contacts, R9, R33, R34. R37~R40, R48, R49...Resistor, PO
2, PO2---7 Otokabura, Ka, SWIφψ
-Dispute switch, FISI, H82@ψ/-7 switch, L...Line terminal.

Claims (1)

[Claims] A main device accommodating a plurality of office lines and a standard telephone are connected by only one pair of communication lines, and calls between the standard telephone and the office lines and extension lines are made through the communication lines and an exchange connection circuit in the main device. In the button telephone device operated through the standard telephone, means for detecting a ringing signal from the office line, generating a ringing signal equivalent to the ringing signal and transmitting it to the talking line, and closing a DC loop circuit by the standard telephone. The main device includes at least means for detecting and connecting the telephone line to the incoming office line via the exchange connection circuit, and is connected to the terminal side of the telephone line and functions as a standard telephone. 1. A button telephone device comprising an answering machine equipped with a switch for selecting an at-home mode in which the telephone operates as an answering machine and an answering machine in which an answering machine function is carried out in response to the arrival of the same calling signal.