JPS59181870A - Line switching device - Google Patents

Abstract

PURPOSE:To allow the switching device to be connected automatically to a line even when a facsimile requests transmission by activating a switching relay when the facsimile requests transmission. CONSTITUTION:When a handset of an accessory telephone set 2 is hooked off in requesting transmission from the facsimile 3, a relay T2 is activated by a DC loop of the telephone set 2. When the relay T2 is activated, a relay LS2 is activated by the control of a sequence control unit SCU12 and its contact ls2 is changed over so as to connect the fascimile 3 to the line. Simultaneously, relays BT1, BT3 are activated and contacts bt1, bt3 are changed over so as to connect a busy tone to a main subscriber's telephone set 1 and a key telephone set 4 from a busy tone transmission section 11. Then, when the main subscriber's telephone set 1 or the key telephone set 4 hooks off in desiring the transmission, the busy tone is heard.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a line switching device that switches and connects a telephone line from this telephone to a facsimile or key telephone system to make a call.

[Prior art]

Conventionally, in a private telephone system, it was not possible to effectively use the central telephone line, so the central telephone line for the facsimile was also used for telephone calls, and by manually switching a converter, the central telephone line, key telephone, etc., and facsimile were switched to the central telephone line. Connected. In this case, the facsimile machine can also be switched and connected to a data terminal device having a built-in NCU (network control unit).

In addition, a line switching device as shown in FIG. 1 has been proposed in the past, in which (0 to 2) of the office lines (0 to 3) are connected to the key telephone main device 4 via the collective connector 7. and the central office line (
3) is connected to the facsimile 3 and the switching device handset 6 via the switching device master device 5.

In Figure 1, the normal office line (3) is on the telephone side,
When receiving a facsimile, the button telephone 42 responds and the line (3) is switched by operating a switch, and the facsimile 3 is automatically activated. When making a facsimile call, operate the switch on the handset 61 to
When the facsimile communication is completed, the line (3) is automatically switched to the telephone side.

However, with the conventional device shown in FIG. 1, when making a call from the facsimile side, line switching requires button operations on handset 6, which is cumbersome to operate, requires extra equipment, and requires button operation. There is a drawback that while the telephone 6 is talking to the central office line (3), due to an erroneous operation of the cordless handset 6 on the button telephone 4 side, the line (3) in use may be switched to the facsimile 3 side. In addition, when switching between a central office line that accommodates a key telephone and a facsimile, even if the switching is done manually, if installation of an automatic answering device (hereinafter referred to as ADD) is required, the ADD is built into the line switching device base unit 5. Therefore, it is necessary to install ADD on the facsimile 3 side.

〔the purpose〕

SUMMARY OF THE INVENTION An object of the present invention is to improve such conventional drawbacks and provide a line switching device that automatically connects to a line only by off-hook when making a call from a facsimile, eliminating the need for manual operation of a switch or the like. .

〔composition〕

Hereinafter, the configuration of the present invention will be explained using examples.

FIG. 2 is an overall connection diagram of a facsimile and key telephone line switching device showing an embodiment of the present invention.

In Figure 2, as in Figure 1, the central line (0 to 3
), (0 to 2) are connected to the key telephone main device 41 via the collective connector 7, and only the office line (3) is directly connected to the facsimile 3 and the key telephone main device via the line switching device 6 of the present invention. 41. Then, the main telephone 1 is connected to the line switching device 6, and the attached telephone 2 is connected to the facsimile 3.
There is no need for a cordless handset or switch. However, only when connecting to the facsimile 3 after answering the telephone 1 when receiving a call, a ringing signal is sent to the facsimile 3 by pressing a button, and automatic switching is performed when the facsimile 3 responds.

Only switching to the facsimile 3 at the time of receiving a call is the same as the conventional function shown in FIG. 1, and requires a button operation. However, for other outgoing calls, missed calls (when the phone does not answer), and voice response calls (when answered by ADD), button operations are not required, and all are off-hook or fully automatic. Line switching is performed by That is, when making a call, both the facsimile 3 and the telephone 4 are automatically switched when the telephone 2 or 4 goes off-hook. Further, when a missed call is received, that is, when a call is received, and the telephone 1 does not respond, the timer automatically switches to the facsimile 3 after a certain period of time has elapsed. Still, A.D.
When D is operated, the facsimile machine 3 responds with ADD at the same time as the call arrives or after a certain period of time, and automatically switches to facsimile 3.

FIG. 3 is a configuration diagram of a line switching device showing an embodiment of the present invention.

The line switching device 6 in FIG.
．． 16 Hz ringing signal sending section 9, amplifier 10, busy tone sending section 11, facsimile side changeover switch 13, button telephone side changeover switch 14, facsimile busy lamp 15, button telephone busy lamp 16, line disconnector 17 , a fixed switch 18, and a plurality of relays and their contacts are provided.

First, when an incoming call is received from the line, the bell of the telephone 1 rings because it is connected to the telephone 1 via the game line disconnector 17. The user picks up the handset of the main phone 1 to answer the phone, and if the other party requests facsimile communication, the facsimile switch 13 is pressed. When the switch 13 is pressed, the relay RGI is operated intermittently under the control of the 5CU 12 at a timing of 1 second on and 2 seconds off, and the interringing signal is sent from the ringing signal sending section 9 to the facsimile 3 via the contact rg1. When the facsimile 3 responds, the DC loop from the +V voltage to the ground voltage is closed, so that the relay T2 in the loop circuit is activated. When contact t2 closes due to the operation of relay T2, S
Under the control of the CU 12, the relay RG1 is restored, the relay L82 is operated and the contact 1s2 is switched, and the facsimile 3 is connected to the line via the 752 fixed switch 18 and the opposing line switch 17. At the same time, relays BT1 and Br3
operates to switch contacts btl and bt3, and send a busy tone from the busy tone sending unit 11 to the main telephone 1 and the key telephone 4 through the amplifier 10.

Next, when the other party requests a call to the button telephone 4, by pressing the button telephone switch 14, the relay RG2 operates intermittently, and the interringing signal is sent to the button telephone 4 via the contact rg2. Sent out. Relay T3 operates in response to the response from button telephone 4, and contact t
2 closes to restore relay RG2, relay LS
Operate I to connect the button telephone 4 and the line.

Next, when an incoming call is received from the line during the above connection operation, the incoming call is detected by the ringing signal detection unit 8, and the 5C
Start the timer in U12.

If this phone 1 does not go off-hook even after the preset time has passed after detecting an incoming call, the relay T1
If not working, the timer times out. When the timer times out, ADD7 is activated through ■ under the control of 5CU12, and at the same time relay AAC is activated.
operates and closes contact AAC, which sends a message informing that the line will be connected to facsimile 3: ``This is ○○. This phone will be connected to the facsimile.''

” is sent to the line. This allows the caller to confirm that he/she has definitely been connected to the desired facsimile. Even if the other party calls you for the purpose of talking, you can hang up at this point.

In addition, if the telephone 1 is off-hook while the ringing signal detection section 8 is detecting an incoming call or before the timer times out, the telephone 1 can respond and send the facsimile 3 or key telephone 4 requested by the other party.
connection can be made by pressing switches 13 and 14.

Please note that during a fax or telephone call,
Relay RB is operated under the control of 5CU12, and contact r
By opening b, the ringing signal detection section 8 is prevented from malfunctioning.

When the ADD 7 finishes sending the message to the line, the 5CU 12 controls the relay RGI to operate intermittently, and the ringing signal sending section 9 sends an interringing signal to the facsimile 3.

When facsimile 3 responds and the DC loop is closed, relay T2 operates to restore relays AAC and RGI.
By operating relay LS2, the line and facsimile 3 are connected.

Next, the operation when making a call from a facsimile will be explained.

When making a call from Facsimile 3, use the attached 'Telephone 2'.
When the receiver of the telephone 2 is lifted, the DC loop of the telephone 2 activates the relay T2. When relay T2 operates, 5CU1
2 operates the HV relay 82, switches the contact IS2, and connects the facsimile 3 to the line. At the same time, relays BTI and Br3 operate, and contacts bti and bt3
The busy tone transmission section 11 connects the busy tone to the main telephone 1 and the key telephone 4. As a result, when the telephone 1 or the key telephone 4 goes off-hook to make a call, a busy tone will be heard.

Next, when making a call from the key telephones 4, when one of the key telephones 4 picks up the receiver, the DC loop relay T3 of the telephone 4 operates, and then the relay LSI operates, causing the telephone 4 to pick up the handset. Connect to the line. At the same time, relays BTI and Br2 operate to connect the busy tone to telephone 1 and facsimile 3.

FIG. 4 is a configuration diagram of the SCU in FIG. 3. 5C
Input signal to U12, 9 ringing signal detection unit 8
Output from (rx), facsimile switch 13, button telephone switch 14, relay contacts tl, t2,1
The 3rd class connects the bus from 1 to ficPU2 via the input boat 22.
Transferred to 0. The CPU 2o loads programs stored in the ROM 21, executes them sequentially, and transfers the results to the output port 23 through the bus. The output boat 23 drives the AAD 7 and relay driver 25 with the result, and lights the facsimile busy lamp 15 and the button telephone busy lamp 16.
The driver 24 is driven.

In Figure 4, a program-controlled SCU is shown, but a hardware-controlled SCU consisting of relays and IC circuits is shown.
Of course, there is no problem with CU.

FIG. 5 is a flowchart of program execution in the CPU of FIG. 4 at the time of transmission.

In steps 30 to 33, when a call is made, it is determined whether the call is from this telephone, a facsimile, or a key telephone.If the call is from a key telephone, steps 34 to 33 are performed.
At step 37, off-hook is detected, the button telephone busy lamp is turned on, and after the destination is selected, the telephone conversation is started. When the main telephone or the attached facsimile telephone goes off-hook during a call, a busy tone is heard in steps 38 to 44 and the telephone is turned on-hook. In steps 39 to 42, 7. is turned on due to the end of the call. When you press the button, the busy light on the key phone turns off.

When the present telephone makes a call, the call is made in the same manner in steps 45-51, and when the call is a facsimile, communication is made in steps 52-6o.

FIG. 6 is a flowchart of program execution in the CPU of FIG. 4 when A, IN) is received.

In steps 61 to 65, when an incoming call is received, relay BT2.3 is turned on, a busy tone is connected to the facsimile and key telephone, the AAD timer is started, and a fixed time t1 is reached.
It is determined whether the telephone is off-hook before the timer elapses, and it is determined whether the timer has timed out. When the telephone is off-hook, manual switching to a facsimile or key telephone is performed in steps 66 to 68 according to the request of the other party. In that case, if this telephone goes on-hook before manual switching, the process will end. When the manual switching is on the key telephone side, the key telephone is called and a conversation is made in steps 70 to 78. At this time, the button telephone display LED is turned on and off, and a busy tone is connected to other devices. If the manual switch is still to facsimile, the facsimile is called and communicated in steps 79-87.

On the other hand, if you want to drive AAD immediately when a call arrives, or if you want to start driving AAD when the timer times out, you can set either one in JP3.
In steps 88 to 96, a voice response is made by ADD, a facsimile call timer is operated, and communication is performed.

In this way, when the line is automatically switched to a facsimile in response to an incoming call from the line and the telephone does not answer, the voice response device (ADD) will send a message, so the caller will be able to connect to the desired facsimile. You can confirm that it is connected.

〔effect〕

As explained above, according to the present invention, when a single line is switched between a button telephone and a facsimile, when making a call from the facsimile, the facsimile can be connected to the line simply by off-hooking the telephone attached to the facsimile. Therefore, there is no need for manual operation of switches, etc., and instant facsimile transmission is possible. In addition, when a call is received, the automatic voice response device can send a message and then automatically switch to a facsimile and confirm that the caller has been connected to the desired facsimile, thereby improving service. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a connection diagram of a conventional line switching device, FIG. 2 is a connection diagram of a line switching device showing an uninvented embodiment, FIG. 3 is a configuration diagram of the line switching device of FIG. 2, and FIG. FIG. 3 is a block diagram of the sequence controller unit, FIG. 5 is a flowchart of program execution when the CPU of FIG. 4 makes a call, and FIG. 6 is a flowchart of program execution when the CPU of FIG. 4 automatically answers an incoming call. . 1: This telephone, 2 Near Aximi IJ attached telephone, 3: Facsimile, 4: Button telephone system, 41: Button telephone main device, 6: Line switching device, 7: Collective connector, 7':
automatic response device, 8: ringing signal detection section, 9: interringing signal transmission section, 11: hissy tone transmission section, 12
13, 14: Changeover switch, 15, 16: Busy lamp, 19: Attenuator procedure correction: 'l' (voluntary) 1981 [July 25a 4"1.i'l Agency Director Kazuo Wakasugi] Junior high school 1 158 158 (Patent Circulation 5591)
8 Shi32 Name of invention 15 with line switching device 3F+li Section 1 Patent applicant + 1 Address: 1-3 Nakamagome, Ota-ku, Tokyo @ 6, % u jr i'1 ('t, 'zen) + 57 Yu Co., Ltd. Ricoh - Representative Hama 1) Hiro 4th Director Convex, the number of inventions increases by J by ← tlli +l
No 6,? Subject of amendment (1) [Automatic response device (hereinafter referred to as AD) on page 5, line 16 of the specification]
D) Correct j to "Automatic response device (hereinafter referred to as AA, D) j. ■Same as page 5, lines 17 and 18, page 5, line 7. Lines 15 and 16, page 13, lines 7 and 12. FADD' and rAADJ K respectively. (3) Similarly, r on page 6, line 2, page 6, line 5, page 9, line 5
Correct ADD7J to l A A l) 7 J. (4) Change "Connect busy tone" on page 10, line 3 of the specification to "Send busy tone." ”. (5) Change ``Send by facsimile'' to 3 lines on page 14 of the specification.
Correct to "Facsimile Transmission".

Claims (2)

[Claims] (1) In a line switching device that switches and connects one line equipped with a telephone interface to one of the telephone, facsimile, key telephone system, etc., an outgoing call from the facsimile key telephone system is detected by closing a DC loop. A means for detecting is provided, and the output of the detecting means detects
A line switching device that switches and connects a line from this telephone to a facsimile or key telephone system. (2) When the telephone does not respond even after a predetermined time has elapsed after detecting an incoming call from the line, the detecting means responds with the automatic voice response device and then sends an interringing signal to the facsimile. A line switching device characterized in that it operates when a facsimile responds.