JPS5999897A - Extension system of standard telephone set in button telephone set - Google Patents

Abstract

PURPOSE:To utilize effectively a mounting space by exchanging a telephone set control unit in a main device so as to replace a button telephone set provided with a control button in 4-wire connection to a standard telephone set in 2-wire connection. CONSTITUTION:A button telephone set interface circuit is provided to a main device KSU of a button telephone set, and this circuit is mounted with button telephone set control units CU1-CU4 connected to button telephone sets TEL1- TEL4. The standard telephone set control unit CU5b is provided corresponding to the control units CU1-CU4, the standard telephone set TEL5b is connected to the unit CU5b to extend the telephone set TEL5b to the button telephone set. The unit CU5b is provided with a relay contact switching the telephone set TEL5b to a main trunk channel or an extension channel, and a relay contact operated for calling to the telephone set TEL5b. The replacement of the button telephone set of 4-wire connection into the standard telephone set of 2-wire is made possible and the mounting space is utilized effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adding standard telephones to a button telephone device, and more particularly, a button telephone interface circuit is mounted on a pre-installed board of the main device. This invention relates to a method for adding a standard telephone or a button telephone device in which a pair of call lines and a pair of signal lines are connected by installing and attaching an extension board to add a button telephone. .

Generally, when a key telephone is installed in a remote location from the in-vehicle equipment, data attenuation due to long lines and data delays due to distributed capacity occur. The installation of a two-wire telephone station was requested and advised.

And this type of button telephone device on foot is equipped with 2
A line-connected long distance telephone is one of the main devices.

A dedicated control circuit was also installed externally.

However, in such a button telephone device,
It has the disadvantage that it requires dedicated control circuits inside and outside the main device, making the configuration complicated and uneconomical. .

The present invention has been developed in view of the above points. This was designed to solve these problems and eliminate these shortcomings, and by replacing the telephone control unit in the VJ main unit, one extension can be connected to a 4-wire button telephone and a 2-wire telephone. To provide a method for adding a standard telephone to a button telephone device which can be used as a standard telephone for connection and is advantageous in terms of mounting space.

In order to achieve such an object, the present invention provides a key telephone interface circuit that connects the same person's outgoing lines to the same terminal position, and connects the key telephone interface circuit and the same person's outgoing lines to the same terminal position, and for dedicated input/output lines to separate terminal positions. An extension board mounted with a standard telephone interface circuit is provided, and this extension board is attached to a predetermined board position of the main device to an extension board position 14 mounted with a button telephone-like interface circuit.By determining the board identification signal in steps 1 to 1, The present invention is designed to add a standard telephone that is connected by only a pair of communication lines, and embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the basic configuration of an embodiment of a key telephone device to which the standard telephone extension method according to the present invention is applied. In the figure, KSU indicates the main unit side. 7 shows the s'ru terminal side.

La and Lb are the office line terminals connected to the office line, E is the ground terminal of the telephone line, and ps is the commercial power supply AC, e.g. 240V AC.
A power supply that obtains DC (1) 24V and DC (+) 5■ with input, TSD is connected to the station line terminal La via a capacitor, and is connected to the station line terminal Lb, and the station line terminal La,
This is an incoming signal detection circuit section that detects an incoming signal from Lb. FA and FB are relays for switching and connecting the terminals to the office line communication path and the extension line communication path 17h, fa! , fag ,
fb, 1 fb2 is the relay contact for switching the local line/extension line, ■ is the relay that operates to hold the local line, h is the holding contact, RC is the contact when re-calling is 1~, for example, about A relay that operates only for 500 ms, re is its PBX hold contact, and RDC is a relay that operates for each of these relays FA, FB, H, and RC based on a control signal from the control circuit CPU.
A relay drive circuit section H2C that drives the holding tone d is connected to the office line terminal La and is also connected to the office line terminal Lb via a holding contact.

[7]The ICC is an individual call control circuit unit, DPC, which sends and receives individual call information between the control circuit unit CPU.
is a door intercom control circuit section that sends and receives intercom information between the control circuit section CPU, and this door intercom control circuit section DPC sends and receives intercom information between the intercom terminal DPT and the door unlock mechanism L)AL. It is configured to send a necessary control signal to and control it.

FNS (1) Control circuit unit A function setting unit that sets various A8 functions in 1.7 between the control circuit unit and the CPU;
O8C is a tone signal generation circuit that generates a ringing signal and an h-sum signal. This tone signal generating circuit O8C generates a ringing signal 17 when a call is received from a central office line or an internal call. The ringing signal has a frequency of 500/600Hz. Modulated at 16Hz, this calling signal and the alarm signal of 600H7 are sent to the amplifier circuit AM via the switch circuits A and S whose on/off is controlled by the control signal from the control circuit CPU.
The signal is input to P and is configured to be amplified.

T is the contact for switching between the local office line and the extension line fa1. fJ,...
・Terminal control interface circuit unit (hereinafter abbreviated as interface circuit unit) with 4-wire connection via the office line/extension line switching contacts fa, fb, . . .
... A transformer connected to IF, b, respectively, and also connected to the door phone control circuit DPC and the amplifier circuit AMP. It constitutes a current supply circuit. The CVD sends and receives necessary control information to and from the control circuit CPU, and the control M? detects the control voltage from the interface circuit IF, IF, ... IF, b. This is the king detection circuit section.

-Then, the interface circuit section IF,' shown by the solid line
, IF, and 94-wire button telephones (hereinafter referred to as button telephones) that transmit and receive signals and voice, respectively. Part IP3. IF
4. IFB a and button telephone 1'% position.

Place 4. Place 5a is a teal for expansion.

In addition, this interface circuit section T FB a and the button telephone rear end 6a are connected to the interface circuit section IF, b with two-wire connection and the terminal telephone with two-wire connection (standard telephone).
It is also possible to stay up late at TεL,b6 and work on each interface circuit part F for this addition.

~IF,a (IF,b) is installed as a fixed device, the interface circuit section IF1. Of course, the connection can be made via the office line/extension line switching contacts fa and fb in the same way as the IF. , ・□And,
This printer's animation circuit section IF, , IF.

The office line/extension line switching contact fa1...; f'b, and the office line side of the contacts fa2 and fb are the office line terminal La1, respectively.
Connected to Lb. 'Also, an interface circuit section IF.

~ IFiIa (1F, b) is configured to be supplied with control signals from the control circuit CPU. b allows you to make inter-extension calls and central office calls with other button telephones, but still
Making/receiving calls from central office lines and extension lines, ・Other telephone Tll;
Figures 2 and 3 are configuration diagrams for explaining the method for adding standard telephones to the button telephone device according to the present invention. , Figure 2 shows an example of a case where there is one central office line and five extension terminals, and Figure 3 extracts the parts related to the control units of key telephones and standard telephones in Figure 2. That's what it shows.

In order to facilitate understanding of the present invention, a detailed explanation will be given below.

In this first plan, the parts corresponding to the same numbers as in Fig. 1 are shown, and L is the telephone line (office line) connected to the office line terminals La', Lb, CU1, C'U, ... CU5 a
is a button telephone-like control unit installed in the main unit KSU, and TFJL2- = '-Okiichi is the extension line 4-wire connection connected to this key telephone control unit CU, ~CU5'a, respectively. It is a button telephone.

□Then, CU shown in M2 diagram (b), b is the main unit KSU
The standard telephone control unit installed in the standard telephone control unit CU, b' is a standard telephone with a two-wire connection connected to the standard telephone control unit CU, b'.

In FIG. 3, (a) shows the side of the button telephone control units CU to CUIla, and (b) shows the side of the standard telephone control unit CUIIb.

In Fig. 3(,), 'ft + 't is the central/internal switch of relay F (see Fig. 5 described later) for switching and connecting the terminal to the central line communication path or extension line communication path. ,
A replacement contact, L is a loop monitoring relay that monitors the loop of the communication line, and CPIU is a control circuit section.

In Fig. 3 (b), Fig. 3 (, 1 and -R show the corresponding parts, fe3. relay FE (see Figure 6 described later) contacts for switching between office lines and extensions, II r't is a standard telephone installation, and b is a ring signal and a zig-tone: operates when sending a signal. Relay = 1. (See Figure 6 below) contacts, LE is a loop monitoring relay that monitors loose communication lines, IT,
Is is an extension current supply circuit for supplying communication current to the extension, and this extension current supply circuit IT-1,S corresponds to the transformer "r" shown in FIG. and B'I'G are the calling signal generation circuit 1 shown in No. 6- to be described later.
and a busy tone signal generation circuit. .

FIG. 4 is a block diagram showing a specific structure of an embodiment of the present invention, showing only the parts necessary for explanation.

In FIG. 4, the same parts as in FIG. 1 are given the same reference numerals, and their explanation will be omitted. Ld is the office line terminal La.

This is a central office line □ circuit connected to the central office line (telephone line) via 1, and this central office line circuit LC is connected to the central office line communication path EX/PH, and also receives the incoming call signal shown in Figure 1. Consists of the detection circuit section SD, PBX' re-base section, arrester, etc.
Hold tone signal generation circuit section H shown in Figure 1 for station line hold
It is configured to be able to connect i-reservation unit Hc including 8G. Then, the central office line communication path EX-PI (relay FA shown in FIG. 1) connected to this central office line circuit LC,
The button telephone post 1. is implemented through the FB contacts fan, fa2°fb, ,'fb, respectively. It is connected to the 4-wire button telephone 9T, which is an expansion board.
...and 4-wire connection or 21! Continuing □Terminal telephone equipment,
It is followed by

And, L/-FA, FB ---H, RC (7)
One end is connected to the common terminal, and the common connection point to the terminal (5) is connected to the (+) 24V power supply, and the relays FA, FB...H, RC
Each of the ports QO, Ql...Q5゜Q of the interface circuit IFC connected to the control circuit CPU.
1, respectively. In addition, the control circuit section CPU
An interface circuit IFC connected to.

ba) QO, Ql is the button telephone suffix of the implementation.

connected to the interface circuit (NFC, baud)
Q2. Q4t extension board button telephone rear.

and a terminal telephone consisting of a button telephone or a standard telephone (connected to each terminal 10 of the i-place 5, and connected to each terminal 10 of the interface circuit IFC)
...and terminal telephone installation with 4-wire or 2-wire connection,
is connected to terminal 8 of interface circuit IFC, port Q6. Q7 is the terminal (1) of the terminal phone TEL.
, (2) respectively. The port QO of the interface circuit IFC, which is connected to the control circuit CPU, is still connected to the terminal (3) of the terminal telephone 43 T E L.
It is connected to the.

The output ports RO and R1 of the control circuit CPU are respectively connected to the button telephone device + via an inverter.

The output ports R2+R4 of the control circuit CPU are respectively connected to terminals 14 of the rear button telephone and terminals 14 of the terminal telephone through inverters. In addition, 2 is a button telephone after the input port of the control circuit CPU.

. . . and the terminal telephone is connected to the terminal 13 of the input port of the control circuit CPU.

The terminal (5) of this terminal telephone is connected to the extension control circuit JCB. Still, the terminal 9 [phase] of the button telephone rear end and the terminal 9 [phase] of the terminal telephone 1 are connected to the output terminals [1] and [2] of the relay drive circuit RDC, respectively. Note that the output terminal (2) of this relay drive circuit RDC is connected to a terminal (9) of a rear button telephone (not shown).

Then, contact faI of relays FA and FB (see Figure 1)
,fa! , fJ, fbl, the corresponding terminal is connected to the extension line IT-PH at the contact position indicated by the dotted line,
At the contact position indicated by a solid line, the corresponding terminal t is connected to the central office line communication path EX! It is configured to be connected to the PH. When each of these relays FA, FB... is energized, the negative contacts fa1... fay, fb, fb2, . . . operate and take the positions indicated by the dotted lines. For example, a button telephone T E i,
When , presses the off-hook button (not shown) to make a call to the central office line, relay FB is also removed and its contacts fb, , fb2 are shown by solid lines. This is the contact position, which allows the button telephone (Ql3 T F
L 2￥+, type to be connected to the central office line EX-PH; V completed! are doing. I still have this button phone:
'r I': On-hook or hold operation of L2 re-energizes the relay FB and its contact fb.

fb2 is configured to take the operating position shown by the dotted line.

Here, (1), (21, (3), (5) and (6) in the terminal phone [4T EL, which is an expansion board)
) C1.1 child is a terminal exclusively for standard telephones with 2-wire connection, and 8, 10, 11, 12, 17 that does not have ).
．． Terminal 18 is a terminal exclusively for button telephones with a four-pin connection. And 1, 2.4 to 7, 9, 13 without 0
, 151T is a common terminal for terminal telephones with 2-wire connection and 4-wire connection.

A transformer constituting the T extension line communication current supply circuit, which corresponds to the transformer T shown in FIG. Connected to IT-PH, secondary winding 4. if S &1) - is connected to the amplifier circuit section of the on signal generation circuit section OSC.

Then, the extension control circuit ICB receives dial pulses I)P from the 44 terminal interface circuits, and 2 pulses from the terminal interface circuit, namely from the terminal (5) of the terminal telephone (1" terminal). A groove is formed so as to count the dial pulses D P 2 k and send the iF number information to the ilJ control circuit c PU.

FIGS. 5 and 6 show the specific configurations of the 4'f'4) connection button telephone and the 2-gland connection standard telephone implemented in the embodiment shown in FIG. FIG.

In this Fig. 5, F is electric field 1 (→) 24v is 1-1
1 and the relay drive circuit RDC shown in Fig. 4.
Interposed between the terminal 9 connected to the terminal 9 and connecting the terminal to the office line communication line or extension line communication line,
'l+'2 is a V-contact for switching the office line/extension line, L is for loop monitoring: it is inserted into the communication path loop, and is connected in series to this relay contact fl to connect the terminal telephone '75-off hook. A loop monitoring relay that operates when a DC loop is formed, l is its loop monitoring contact, its terminal is connected to terminal 13, and the other end is connected to the
The output port of the control circuit CPU shown in the figure is connected to the collector of a transistor Q which is turned on in response to a signal DBO from a.Then, the relay contact f
The normally closed contacts of bf and bf are connected to terminals 6 and 6, respectively. '7 to the central telephone line EX-PH, and via normally open contact terminals 4.5 to the internal telephone line IT-PH. □ ・Here, the contacts f, , f, , 13- and relay'L of this relay F are the contacts fl'+'! shown in FIG. 3(a), respectively. and corresponds to relay L.

And, the terminal 8 on this 4-wire button telephone
．． 10 to 12, 17, and 18 are terminals exclusively for button telephones, and terminals 1, 2, and 4 to T.

There is a common terminal □. □*'m, CH'B choke coil. □": At the position indicated by the dotted line at one point "Il f2' of "Rele" F, the ice is connected to the inner □ line communication path IT-PH,
The position indicated by the solid line is 'terminal i' station connecting channel EX'-PH
It is configured to be connected to. When this relay F is energized, the contact ``f: '* f t operates and assumes the position shown by the dotted line.・When hooked and press the line button (not shown): Relay F is restored and that point f I'+'''f t becomes the contact position indicated by the solid line, and this causes the button to Telephone 1'Q, a is configured to be connected to central telephone line 14iyc-PH. In addition, □ and Hiretan Telephone Therapy TF, L+,
The relay F is re-energized by the on/off or hold operation of 'a', and its contact f': + "! is configured to take the operating position shown by the dotted line. □: In Fig. 6, FE is a relay that is interposed between the power supply (+) 24" V and the terminal 9 connected to the relay drive circuit RDC shown in FIG. , ' fe, ', ' f elboso・'s office line; A relay contact for blind wire exchange, and its normally closed contact connects to the seventh station line communication path EX-P) via terminal □8.7, respectively.
The normally open contacts are connected to the internal line IT-PHK via terminals 4 and 5, respectively.

LE is a loop monitoring relay that operates □ when a DC loop is formed by hooking up and forming a DC loop, and one end is connected to contact 1 of relay ■. is connected to the relay j-contact f1 for switching the office line/extension line, and the other end is connected to the i-connection standard telephone TBL, b, which is the terminal power supply device, through the terminal connection 15 f. 't. In addition, the glue for switching between the office line and the extension line, - contact, and 2 are the contacts 1 and 2 of the relay ■'. and is connected to a standard telephone post, b, with a two-wire connection, via a terminal 16. T
, inside-call i supply 4. This choke coil T.

corresponds to the transformer T shown in FIGS. 1 and 4.

In addition, the contacts fe, tel of the relay FB and the relay L
l1m and -A'l'l□l of relay I are the contact points shown in Figure 3(b):・1'+f・・and relay L
E ↓ and contact '1, which corresponds to "I'm.'
□RGO is a ringing signal generating path, and its output terminals are respectively i and R1';
Connection Atransimeta Q Iris QL via iSeiT! Both ends of the primary ILI winding P are connected. BTG is business”
Tone signal base: At the turn: The output end of the wire is connected through the resistor R3 and capacitor c in series - BUo' contact bu
K! The connected circuit pc is a photocurve consisting of a light-emitting element Pd and a light-receiving element pt, and this i-system t' = □blur pc is tangential to the DC loop □ which is connected to the i-type when the calling signal is sent out, and the a name is .

Then, the heel mH24■ is applied to the tenonide side of the luminescent ice □Pd through the i pile length 4 □, and it is connected to the terminal 1:
The contact bu (C'@' of the relay BU is connected via the diode "")"D'> to the side of the photodetector pt, and the collector of the photodetector pt is connected to the power supply (+) via the resistor R6.
Terminal 1 to which 124 V is applied and terminal 2 connected to the signal Grazo psa are connected to the base of the resistor □R, , R, and the transistor 7jw'□ connected in series, and □Resistor R, through the 4th ink '7□
Control signal R8T from boat QO of ace circuit IFC3
It is connected to a terminal (3) to which N is applied, and the emitter of the light receiving element pt is a resistor P. The terminal 2 is connected to the base via the terminal 2, and is also connected to the terminal 2 connected to the signal ground SG. The collector of the transistor Q6, whose emitter is connected to the terminal 1 to which the power supply (→-) 24V is applied, is connected to the center tap of the primary winding fiP of the transformer T through a resistor R8°. The base is connected to the connection point between the resistors R6 and R7. These constitute a calling signal control circuit. In addition, a capacitor C7 is connected in parallel to the secondary winding S of this transformer T2, and one end of the secondary winding S is connected to the terminal 2 connected to the signal ground SG, and the other end is connected to the terminal 2 connected to the signal ground SG. (is connected to contact bu of relay BU via capacitor C3.

On the other hand, one end of the relay ■, which operates when sending a ringing signal and a busy tone signal to the standard telephone TE Lllb, and one end of the relay BU, which operates when sending a busy tone signal to the standard telephone 43 TEL, b, has undergone electrolytic corrosion (+
)24V, and the other end is connected to the transistor Qy.
, Qs. And this transistor Q? , the bases of Qs are resistors R+I+R1, respectively.
1 signal + 3 IDv is applied from the boat Q6 of the interface circuit IFC2 shown in FIG.
) and the control from the port Q7 of the interface circuit IFC2 shown in FIG.
It is connected to the terminal (2) to which V is applied.

-y = t, j of contact 1e of relay LE: Connected to terminal 13 connected to input port of control circuit CPU shown in Fig. 4; are connected in series to the output port R of the control circuit CPU shown in FIG. , is connected to the terminal (6) for sending the signal RMD to the control circuit section CP [1Q input capo-1. Grounded. Here, relay L
A contact le of EE is configured to give hook information to the control circuit CPU shown in FIG.

Next, the operation of the embodiment shown in FIG. 4 will be explained with reference to FIGS. 5 and 6. First, a standard telephone TEL,b with a two-wire connection mounted on the board of a terminal telephone 9T and a button telephone with a four-wire connection were installed.

When two parties, . This is done by the communication current supplied to the IT-PH.

In the case of an "f'r" call, for example, a four-ring button telephone is off-hook and the extension button is pressed. In this case, from the telephone terminal circuit of the button telephone installation, through the telephone line path, and through the extension communication path IT-PH, to each button telephone installation, 'I'EL.

...is given to the speaker.

On the other hand, the calling signal from the tone signal generating circuit section OSC that generates the calling signal and the alarm signal is controlled on/off by the control signal from the control circuit section CPtJ applied to the gate of the switch circuit section As shown in FIG. will be carried out.

Here, the control circuit section CPU identifies the type of incoming call and supplies a control signal for the on/off control 1 to the gate of the switch circuit section AS as described below.

That is, in the case of receiving a call from a central office line, it is turned on for 0.4 seconds.

It is controlled at the timing of 02 seconds off, 0.4 seconds on, and 02 seconds off, and in the case of an extension call, it is controlled at the timing of 1 second on and 2 seconds off. Then, the incoming call signal created by this on/off control is sent to the button 745, t5"!
Be given to...

1, standard telephone 9T, b +J: At 5, a discharge signal is generated by a ring signal generator RGO (approximately 45 Ih), not shown in Fig. Magnified into a signal. The ringing signal is then sent to the standard telephone jJ'e TE Ti5b with a two-wire connection through contacts iH, 12 of relay I shown in FIG. 6, and drives the ringer.

On the other hand, 600 Hz from the tone signal generation circuit OS C
When generating an alarm signal, the if'i warning tone and off-hook alarm tone are controlled by the control circuit CPU.
This is performed by applying a control signal of an action level H'' to the gate of the switch circuit section As shown in FIG.

: These tones are amplified from the speakers of each of the four-wire connected Ahotan telephones T'i L, .

Next, to discuss and clarify the case of an incoming call from an extension, the two-line connection standard for the terminal telephone J+a TE'L, and the incoming call from both the office line and the extension to the terminal telephone TEb, b). □, the control unit CPU sends the signal IDV %I('#) from the boat Q6 of the interface path IFC, and operates the relay I shown in Figure 6.Therefore, the vehicle inspection telephone tJrEt: ', b□, the off-hook signal detection circuit at the time of an off-hook call is as shown in Fig. 6. -Re1°] Standard 11 equipment "-Re'-Contact°--Signal ground 1'' White G path is formed, and is detected by □Off switch □Tsuku line number stone photocoupler PC." The calling signal is sent from the output port 'O6 of the control circuit c'p'u to the interface circuit IP'C.

baud) is struck by sending signal 'R8TN through QO'4. When this signal R8TN becomes 1H', the transistor shown in FIG.
The φ point of the primary winding i'P of ) is <+) 24 'v's! , sourced from sources. In this state, the call signal generator
In addition to the 3'O trace, each of these transistors Q+
, Qs transitions to the 1-state, and the transistor Qs,
When Qs is turned on, the transistor "At" (Q4 is also turned on), and both ends of the '1st-order fl11 winding gauze P of the transformer T are alternately connected to the signal ground S "G K frame H, so that the transformer T , the input voltage is applied to the secondary winding i in a step-array manner, and this serves as a calling signal line. This call signal □ is connected to the upstream 1 shown in Fig. 6, the secondary winding S of the signal ground SG knee transformer, the capacitor C7, the capacitor C3, the relay IJ9Jbu-
Relay WA point i'1 - Capacitor C4 - Standard telephone T.
EL5'b - relay contact i.

-Signal ground 8G The signal is sent to a standard telephone with a 2-wire connection via a 4W connection path.

When this standard telephone TIDL,b goes off-hook, the aforementioned off-hook signal detection circuit closes and direct current flows, turning on the photocoupler PC, and as a result, the transistor Q11 turns off. , transistor Q6 is also turned off, so that the primary winding P of transformer T2
The m source supply to transistor Q and transistor Q is stopped through the transistor Q, and the ringing signal is stopped.

In addition, on the other hand, when the standard telephone postfix of the 2-condensed connection is connected to the home where the off-hook terminal . It is sent to the control circuit unit CPU. , So □Wow, when the output port R4 of the control circuit CPU sends a 1L" signal to the scanning terminal,
The signal 4ono applied to the terminal 14 of the standard telephone rear panel shown in FIG.
Therefore, when the relay contact 1a is closed □, the loop □ signal L60P supplied to the input port K2 of the control circuit unit CPU related to FIG. 4 passes through the diode □ 1L"
Then, the operation of relay LE is detected. Here, this control circuit section. pui input card g-), ni 2 is ya. Inner Amab.

And this relay □-contact 1e is the loop signal LOO
P is a detection signal of the DC loop, and active 1 is applied to the input port of the control circuit CPU shown in FIG.
It is LI's wandering number. Still, the signal D'BO sent from the output port hn4 of the control circuit cpo is a 1)1 power signal for selecting or running the manual power, and the control circuit i"'c"p i i output port There is a signalman with "active L" in "il".

In this T, the diode D forming the additional board identification section shown in FIG.
One for wire connection, i.e. a 4-wire button charger,
Or 1. It is a board identification signal for identifying whether it is a standard telephone with a two-wire connection, that is, a standard telephone with a two-wire connection. If the board identification signal 1) is scanned by the board identification signal 1) II O, the output of the input/input INV becomes 'L', so the input port R1 of the control circuit CPU shown in FIG.
It is configured to give 'L'' to 1. It's -1, 4
In the case of an expansion board for adding a button telephone, the diode 1] is not connected to the terminal (6), so
I is not given to the control circuit section CPU0 input capo) R11.

In this way, by attaching an expansion board on which a button telephone interface circuit is mounted to a predetermined board position of the main unit KSU, a button telephone connected by a pair of communication lines and a pair of signal lines can be added. , button i above
An extension board is installed with a standard telephone interface circuit that is led out to the same terminal position for the t3 interface circuit and the same terminal line, and to individual terminal positions for the dedicated input/output line, and this standard By attaching the extension board with the telephone bombing interface circuit mounted on the upper 612-button telephone hole interface circuit to the /ζ extension board position and determining the board identification signal DBO, it is possible to connect the standard with only one pair of communication lines. r'Hj Wjf story (you can add more.

Then, the control circuit unit CPU operates 211 as described above.
When the standard telephone postfix of the te connection, b is hooked up/knows that, depending on whether the incoming call is from an extension or from a central office line, Ikuoki 1: circuit part c p +, + indicates as follows.

In the case of an internal incoming call (1), the port Q4 of the interface circuit IFC shown in No. 411 remains 'H', and therefore, the relay FE shown in Fig. 6 is always in the full operating state. Continue. Snnnnwachi, that contact fed, f
It is at the position indicated by the e2 dotted line. Therefore, the relay is connected to the board of the interface circuit NFC shown in FIG.
Q6 Te signal IDV;7:ゝL” fr:, I)
, restore. Therefore, standard telephones (equipment,
bij, Conden @J CB Oyohikon fn-9cB
The direct current is connected to the internal telephone line IT-PII through
Relay LE - Standard telephone rear end, b - Relay contact i, - Relay contact fe2 - Joke coil T, - Resistor R14 - Standard telephone t% T E L with 2-wire connection through the path of signal ground SG (contact).
, lb.

In the case of an incoming call on the central office line (interface circuit IFC, 0 shown in FIG. 4) Q4 y'
y: becomes L#, relay FE is restored, and relay I
2-wire connection standard telephone (ffTEt, b is connected to the central office line EX-PH). Then, after the call ends, when on-hook, relay L is connected.
E is restored, and the 111 configuration of the contact le is transferred to the control circuit section CP.
U's output port R4 and input port (K2) are detected and everything is returned to its initial state.

Next, we will explain the calling operation. 1. When the 2m connection standard telephone rear end and b are hooked up, as shown in Figure 6, the power supply (+l 24 V - resistance RI 3 - choke coil T, - relay contact fel -Relay contact 1゜Relay contact h -Relay contact fe2- Choke coil T+
A loop current is supplied at j- through the path M resistor R14-signal ground SG and is connected to the extension telephone line IT-PH via a two-wire connection standard telephone tarEt,,bH capacitor C,,C,. And relay L
E operates and sends the off-hook information to g:P, the control circuit c p u shown in FIG. 4, as described above through its contact le.

In this state, a 40-connection end-button telephone is called by simultaneous ringing from the handset of the two-wire standard telephone I, H, and if the other party answers, a conversation can be made.

If the inner gauze control circuit ICB is provided as in the embodiment shown in FIG. 4, individual extension calls can be made by dialing. In other words, since there is an extension control circuit ICB, the change in voltage drop due to the resistor R port in the upper six supervisory circuits (due to dialing) is sent to the extension control circuit ICB, and the information is sent to the control circuit CPU. If the dialing tone signal is configured to be sent to ◇yet, □ when counting dial pulses, the dialing tone signal is sent to the extension line IT-P).
It is sent via l.

Next, if you want to capture the central office line from a standard telephone horizontally placed with a two-way connection, as explained in the section above when the standard telephone is off-hook, go off-hook and set the loop current. standard telephone horizontal connection with two-way connection,
By hooking b, set Siri Relay LE to 200-10001
After completing the laparotomy 1 of 00O, the relay contact 1m sends the ringing information to the control circuit part CPU shown in FIG. 4. Then, the control circuit CPU learns that the two-wire connected standard telephone Tl8L, b intends to seize the central office line, restores the relay FE, and connects the two-wire connected standard telephone horizontally placed, b. Connect to the station.

If the extension control circuit ICB-1) i is provided as in the embodiment shown in FIG. It is possible to continue the process. In addition, in this case, another 4-wire button telephone (if the breast is using the central line, the control 1
The road unit CPU operates the 60th relay I and the relay BU, and sends out a busy tone from the busy tone signal generating circuit BTG to the standard telephone TEL,b connected to the 60th line. During this busy tone, [m is generated simultaneously with the signal in the busy tone signal generating circuit BTG.

Then, the direct current when this relay BU operates is as shown in Fig. 6: Power supply (+) 24 V - Resistor R0 - Relay contact bu - Relay contact h - Relay XJE - Standard telephone T E L
, b - relay contact l, - signal ground SG, and the busy tone is supplied from the busy tone signal generation circuit BTG to the resistor R8 and the capacitor Ci.
The above standard telephone number is given to the above standard telephone address, b.

With this busy tone, a standard telephone with two-wire connection
When E L and b go on hook, everything returns to its initial state.

Please also transfer from other key phonesヮ□. By replacing the telephone control unit in the main unit IIU, it is possible to change the standard of 21 connections from a button telephone with 41 controls and buttons. This is a replaceable unit, so by replacing units of the same size in the same location, one extension can be used as a 4-wire button telephone or as a 2-wire connection. Therefore, it is advantageous in terms of mounting speed. 'The practical effect is extremely
2ff9 connection legacy M that was “199ed” with Soμ0→,
Unlike telephones, there is no need to provide a dedicated control circuit inside or outside the main device, so the configuration is simple, and it is extremely effective in that it is economical due to the simplification of the configuration.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of an embodiment of a button telephone device to which the standard telephone addition method according to the present invention is applied, and FIGS. 2 and 3 show the standard telephone addition method in the button telephone device according to the present invention. A barrel diagram for demolding the method,
Figure 4 □, ←Structure showing a specific configuration of one embodiment of the invention, Figures 5 and 6 are partial extractions of the button telephone and standard telephone in the embodiment shown in Figure 4. FIG. □ KSU ・---・Main unit, position I to position 3. Place 5g...
Button telephone, TICL, b −・°°standard phone u +
R, IF CI ~ IFC, ... Interface circuit, CPU ... Control circuit section / Patent applicant Tamura Electric Co., Ltd. Agent
Masa Yamakawa I.T. ((1 other person) (0) KSLJ Figure 2 (b) SLJ

Claims (1)

[Claims] By attaching the first expansion board on which the button telephone interface circuit is mounted to the predetermined position of the circuit board on the vehicle/armor, it is possible to add an arresting telephone connected by one pair of communication lines and two pairs of signal lines. When going to a button telephone device that has been installed, it is a standard telephone in which the telephone interface circuit and two output lines are routed to the same terminal position, and the dedicated input/output lines are routed to individual terminal positions. A second expansion board with an interface circuit mounted thereon is provided, and the second expansion board with □ is attached to the tenth expansion board position and the board identification signal is determined, thereby making two pairs of calls υ′ and ′. A method for adding standard telephones to button telephone equipment □, which is characterized in that connection is made only by wires and standard telephones are added. □ ・ ′ □ ・・