JPS61238194A - Key telephone system - Google Patents

Abstract

PURPOSE:To prevent a call from being disconnected due to the termination of backup by providing a power failure key telephone system with a power failure monitoring relay setting a power failure action mode where direct incoming and outgoing can be free with respect to a telephone circuit and a mode changeover switch restoring forcibly the monitor relay. CONSTITUTION:A tone ringer 38 and a speaker SP detect incoming when in a manual changeover-type main device KSU1 a switch SW0 is operated, or the relay PS is restored to connect a call line 51 directly to the telephone circuit, and a call circuit 32 executes calling corresponding to turning on a hook switch HS<2> due to off-hook. Even if the operation is backup by the battery power source B17 of the KSU1, the mode changeover switches SWS and SW of the KSU1 and the key telephone system ST61, or the SWS and the switch SW0 are operated. Then the telephone circuit is arbitrarily connected to the ST61, which simultaneously comes to the power failure action mode, and the direct incoming and outgoing can become free with respect to the telephone circuit. Accordingly the backup by the B17 is terminated, and a call with not be suddenly disconnected.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a commercial power source as a main power source, and also has a power outage countermeasure function. This article relates to a button telephone device equipped with a button telephone device.

[Conventional technology]

Key telephone devices generally use a commercial power source as a piezoelectric power source, and if they are equipped with a battery as a countermeasure against power outages, the telephone line is connected to the main device's communication path after the backup available time corresponding to the battery capacity has elapsed. It is possible to manually or automatically switch from the switch side to the power outage button telephone set in a specific accommodation position, and to make and receive calls directly from the power outage button telephone line.

In addition to the normal standard configuration, power outage button telephones are equipped with a dialing circuit, a tone ringer for power outages, a power outage monitoring relay, and other functions. is restored, the dialing circuit is activated, the power outage tone ringer is connected to the telephone line, the receiving loudspeaker circuit is disconnected from the calling line, and the power outage tone ringer is removed from each circuit used when the loudspeakers for receiving loudspeakers and various signal tones are energized. It is designed to switch from the energized operation mode to the power outage operation mode.

[Problem that the invention seeks to solve]

However, if battery power backup is no longer possible, the calls made by Rikishima and others will be suddenly disconnected, so if the backup time is expected to end soon, the aircraft will be placed in power outage mode and then depart/arrive/depart. It is desirable that
Alternatively, a method of cutting off the battery power source may be considered, but in this case, the operation of all devices would be stopped and other calls would also be cut off, creating an undesirable problem.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention provides V
It is configured as follows.

That is, in the above-mentioned button telephone device, it operates in response to the power supply from the main device, sets the energized operation mode, and recovers in response to the power supply cut off from the main device, so that it can immediately connect to the telephone line.* There is a power outage monitoring relay that sets the power outage operation mode freely, a mode changeover switch that forcibly restores this monitoring relay, and a power outage button telephone set.

[For production]

Therefore, even if a failure occurs during backup using the battery power source, the power failure monitoring relay is restored by operating the mode changeover switch, so the power failure operation mode can be set freely.

[English example]

Hereinafter, the present invention will be described in detail by way of example.

Figure 2 is a block diagram of the manual switching main unit (hereinafter referred to as KSU).KSUl accommodates telephone lines 21 to 2n such as telephone lines from a central office line or a private branch exchange, and these are It is possible to connect to external devices such as various terminal equipment [3] through the switch SWs to 5Wnk, and as shown in the telephone line 21 as a representative, the relay contact dll for sending dial pulses and closing the DC loop is normally connected. , and line transformer LTtt- to a communication path switch (hereinafter referred to as TSW) 4, and according to the switching connection of TSW 4, transformers T1 to Tm and communication lines 51 to 5m are connected to each other.
It is connected to key telephones (hereinafter referred to as 5T) 61 to 6m via ff1.

At the same time, the communication current is supplied to the communication lines 51 to 5m from the communication current supply circuit (hereinafter referred to as TCP) 7, and the operation of any of the disconnectors 8% and SWs to SWn is performed. Accordingly, the communication line 5T is connected directly to the corresponding one of the telephone ports ls2t to ls2n, and switching from the TSW 4 side to the power failure 5T61 is performed.

9. In parallel with contact dis, capacitor C for eliminating sparks.
1 and resistor Rss and relay contact dss
The column circuit is connected, and the contact dsl is turned on while the dial pulse is being sent out, preventing the generation of sparks in response to the turning off and on of the contact dis, and between the disconnector Sw1 and the contact dl, NgK detection circuit (hereinafter referred to as RDT) 8
is connected as a bridge, and its detection power drives the 5 ringer circuit (hereinafter referred to as RIG) 9't-, and the KSU, 1
N-sign is not working! The notification will be made via RIG9.

On the other hand, the control unit (hereinafter referred to as
CNT) 10 is provided, which connects the transmission circuit (hereinafter referred to as TR) 11 which also supplies power and the signal line 12s~
12mt", transmits and receives data signals to and from each 5T6t to 6m, receives operation data indicating the operating status of each 5T61 to 6m, and makes control decisions based on these and the detection power of RDT8, Drive circuit (hereinafter referred to as
DRV) 13't- relays D11 to Dlnx
When controlling DSs-DSn and sending dial signals using complex audio frequency (hereinafter referred to as MF) signals,
Control of the MF signal generator (hereinafter referred to as MFG) 14, and
TSW4 controls the hold tone generator (hereinafter referred to as HTG) 15, and TR11! Control data is transmitted through the controller, and the display and operating conditions of each 5T6s to 6m are fully controlled.

In addition, the main power of commercial power supply? j! Act power supply circuit (hereinafter referred to as P
S) 16 converts it into direct current and supplies it to various parts as a power source E. However, a battery power source (hereinafter referred to as B) 17 is provided, and in the event of a power outage of the raw power source AC, B17 will be used for a time corresponding to the capacity of this power source. Perform a medium backup.

FIG. 3 is a block diagram of the automatic switching type KSU 1, and the telephone lines 21 to 2n are the contacts dil in FIG.

dsl, RDT8, DRY 13, MFG 14, HT
External line interface (hereinafter referred to as LIF) 21s to 2111 with functions such as G15? Each 5T6s to 6m is connected to TCF7 in Figure @2.
.

It is connected to the TSW 4 through a telephone interface (hereinafter referred to as TIF) 221 to 22m 'e that completely blinds the functions of the TR 11, etc., but the telephone line 21 and the communication line 51 (
A relay contact pf"tp f2 for continuous connection of WI is inserted in each, and if this is restored, the telephone port!! 2 t
is switched and connected from the TSW4 side to the 5T61 for power outage.

In addition, a series circuit of a power failure monitoring relay PF and a mode changeover switch SW is connected to the output of B816.
While the main power supply AC is energized, the relay PF operates and each contact p
However, if backup by B17 becomes impossible after a power outage of the main power AC, the above-mentioned switching connection is performed using contacts pfl and pf, and LIF211, TSW4, TIF221
is made irrelevant, contact pf"t-on, and C
This information is given to the NT 10, the setting of the power failure operation mode is stored, and the 5T6s is directly connected to the telephone line 2 to store the following information.

FIG. 1 shows a 5T6 for power outage connected by a communication line 51 and a signal line 121 and housed in a specific position of KSU1.
1 is a block diagram of the communication line 5, which connects the communication line 5 to the communication circuit (hereinafter T
KO) 32, as well as another similar line L! The side is via the hook switch H81, DB 31'',
It is connected to TKC32.

Break pole of contact pf a” and hook switch H8I
DB through the hook switch H8”t-to the main pole of
33 is connected, and a dial pulse sending transistor Q1 and a diode DI are inserted between the positive terminal of this and the positive terminal of DB31, and the transistor Q1 is controlled to turn on and off by the transistor Qz. It has become.

In addition, the negative vision of DB31.33 is commonly connected, and the DB
A dial circuit (hereinafter referred to as DIC) is connected between the positive electrode of 33 and these negative electrodes via a constant current circuit (hereinafter referred to as CIC) 34.
) 35 is connected, this is a dial key (hereinafter referred to as DK)
In response to the operation of 3B, the bias of the transistor Q1 by the resistor R1 is fully controlled through the transistor Qsk,
This turns it off and on, and sends out dial pulses.

Nao, H point pf a "" T le MAl! l
Between Ll and L, a resistor 1au and a capacitor Cst are connected to DB37? A tone ringer (hereinafter referred to as TRG) 38 for power outages is connected via e,
The output of this is given to the speaker SP via the transformer Ts and the contact pfs2', as well as the contact pfs1 and the hook switch H8I? One line L1 and another line L
A resistor R1! is connected between ffi and R1! A transformer Tv for audio component extraction is bridge-connected through the capacitor C12 and the analog switch (hereinafter referred to as A).
SW) and an amplifier (hereinafter referred to as PA) 40 to the speaker SP.

On the other hand, the signal line 121 has PS41 and TR42.
is connected and the power supply ff1Ps supplied from KSUl
41 is stabilized and supplies it to each part as a local power supply V, and the CNT 10 of KSUl is supplied via TR42t.
Similar to DK3B, the small-scale CNT43 sends and receives data signals (lrt-), and the hook switch US" is turned on by off-hook. In response to the output of a keyboard (hereinafter referred to as KB) 44 equipped with function keys, operation data indicating these conditions is transmitted, but on the other hand,
In accordance with the received control data from KSU1, a display unit (hereinafter referred to as DP) 45 consisting of a group of indicator lights, a tone generator (hereinafter referred to as TSG) 46 that generates a signal tone of 6, and its output to PA40. Give ASW47. and ASW
49, PA4G, etc.

Furthermore, a series circuit consisting of a power failure monitoring relay PFS and a mode selection switch SWS is connected to the output of PS41.
It operates according to the power supply from KSUl, and the contact pfa
1. pfs2t - Although the energized operation mode is set as the operating state, the contact pf
s'' to both lines Lt and Lx t-DB33 and to TKC32 and DIC35 to transistor Q1.
It is assumed that the loop current from the telephone line is passed through the 1 diode Dt t or the CIC 34, and the power is switched to the input 1 TRG 38 of the speaker SP to set the power outage operation mode.

In addition, if the contact pfs2 is restored, the resistors R13 to R1
8. A forced reset circuit (hereinafter referred to as CR8) consisting of a capacitor C1m, a transistor Qs, and a diode D
) 48 is released, and the transistor Q
Give a reset signal to CNT43 as s't on,
This will force all operations to stop.

In addition, a watchdog circuit (hereinafter referred to as WDC) 49 and an initial reset circuit (hereinafter referred to as IR8) 50 are set up to monitor the operating status of the telhD, WDC492>f CNT 4312), and to respond if a runaway occurs. Accordingly, the CNT43t-!j is set on the CNT43t-!j via the diode Ds'', and the lR850 responds to this and sets the CNT43t-!j on the CNT43t-!j at the start of power supply. J is set and starts the operation.

Therefore, while power is being supplied, the next operation date/2>
T431/CLp, sent to KSUl via TR42, which allows friends to dial out and exchange connections to KSUl.
The CNT43 controls each part according to the control data from the KSU1, and the DP45KJ:
, b display, ASW 39, PA 4017), the on-hook monitor is controlled by the ASW 47, and various signal tones are sent out by the control of the TSG 46, and a call is made by the TKC 32 in accordance with the operation of the hook switch H8I.

On the other hand, if the power supply is cut off, the CNT43 will stop operating due to the recovery of the relay PFS, and it will no longer transmit or receive data signals, the display on the DP45 will also stop, and the transmission of signal sounds by the TSG4B will also stop. However, in KSU i, the cutter SWo″ of FIG.
f: If the relay PF in Figure 3 is restored and the telephone line 51 is connected directly to the telephone line, TRG38
The incoming call is announced by the speaker SP, and in response to the off-hook turning on of the hook switch H82, the TKC32
A call will be made.

Further, when off-hook is performed, the loop current from the telephone line puts the DIC 35 into operation, dialing is made in response to the operation of the DK 3B, and the TKC 32 becomes free to make a call in response to a response from the side.

6 while backing up with KSUI's B11
However, if you operate the mode changeover switches sws and swt on the 5T61 and KSUI, and just in case, operate the switch S and the disconnector SWo in Figure 2, the telephone line can be changed to 5.
When connected to the T61, the 5T6t enters the power outage operation mode and can freely make and receive calls directly to the telephone line, so there is no risk that the backup by the B17 will be completed during the call and the call will be suddenly disconnected.

Note that due to the power failure operation mode setting on the ST6+ side, data transmission and reception is stopped, so this CNT of t-KSU 1
10 and stores it as 5TSxk busy.

However, even if the contact point Pf3 in FIG. 3 is omitted, it will not affect many people, and the configurations shown in FIGS. 1 to 3 can be arbitrarily selected depending on the situation.

In addition, the operation of the mode changeover switch SWS of the 5T61 is communicated to the KSUl as operation data, and the KS
Various modifications are possible, such as allowing Ul to automatically switch and connect telephone lines.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, by simply providing a mode changeover switch, the power outage operation mode can be freely set, and there is no fear that the call will be disconnected due to the end of backup. A remarkable effect can be obtained in various button telephone devices equipped with a backup battery power supply.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; FIG. 1 is a block diagram of a power outage key telephone, and FIGS. 2 and 3 are block diagrams of the main device. 2 ri ~ 2Bm* ・ ・ Telephone line, 4 ・
・Pot ・TSW (communication path switch), 51~5m・
...Call line, 61~6n...ST (button telephone), 16゜41Φ dispute...PS (power supply section), 1T...
B (battery power supply), 32...TKC (communication circuit), 3
5...Fist DK (dial key), 38...TRG
(tone ringer), PF, PFS @-... Power outage monitoring relay, p11~pf3* Pfgltpfs ・
...Contact, SWo *-ψ/Disconnector, AC...
Main power supply.

Claims (2)

[Claims] (1) Uses a commercial power source as the main power source, and is equipped with a battery power source for backing up in the event of a power outage of the main power source, and when backup by the battery power source becomes impossible, a specific storage location can be set up from the communication path switch side of the main device. In a button telephone device that switches and connects a telephone line to a power outage button telephone, it operates in response to the power supply from the main device, sets the energized operation mode, and restores in response to the interruption of the power supply to connect the telephone line. A button telephone device for power outage, characterized in that the power outage monitoring relay is provided with a power outage monitoring relay for setting a power outage operation mode that allows direct call making and receiving, and a mode changeover switch for forcibly restoring the monitoring relay. (2) A patent characterized in that it uses a power outage monitoring relay that has a transfer-type contact that switches the input of the speaker upon operation and restoration, and also provides a reset signal to the control unit upon restoration while power is being supplied from the main device. A button telephone device according to claim 1.