JPS6238066A - System for supervising telephone set connecting state - Google Patents

Abstract

PURPOSE:To prevent a telephone set or the like from being a victim to a theft by designing that the electric state of a supervisory contact is changed when a receptacle is disconnected and a station detects the state. CONSTITUTION:Two contacts among remaining contacts not used for the connection to a talking line in contacts of a receptacle CON are used as supervisory contacts S1, S2, terminals S1a, S2a of male receptacle CONa are short-circuited and terminals S1b, S2b of female receptacle CONb are connected respectively to a talking function connecting state supervisory circuit TSCSC via a remaining control line A. The telephone set connection circuit TSCSC constitutes the detecting means detecting the difference in the electric state of the supervisory contacts and sends connecting state information of each telephone set EXT to a controller CC based on the result of detection. When the male receptacle CONa of the receptacle CON is disconnected from the female receptacle CONb, the connection of the terminals S1a, S2a and the terminals S1b and S2b is disconnected and the control line is in the open state.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for monitoring the connection status of a connection outlet used for line connection of terminal equipment such as a telephone.

(Prior art) In recent years, connection outlets that can be attached and detached with one touch have begun to be used as a connection structure for connecting terminal devices such as telephones to lines on the subscriber side. You can now easily exchange your phone for another compatible phone.

(Problems to be Solved by the Invention) However, since the connection connector C is easily removed, it may be removed by mistake during cleaning, etc., resulting in poor service to users of telephones, etc. There were problems such as an increased chance of theft (especially when using a decorative telephone) in places where many outsiders come and go.

Conventionally, disconnection of the handset has been dealt with by the howler sending function and lockout display function of the exchange, but there is no way for the central office to monitor disconnection of the connection outlet, and the subscriber has to discover it himself or herself. Currently, problems were only discovered after requests from other subscribers to investigate the problem.

In view of the above-mentioned problems, the present invention prevents the deterioration of service to users of telephones etc. due to disconnection of the connected outlet, and
The purpose of the present invention is to provide a connection status monitoring method that can prevent the theft of telephones, etc.

(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, a part of the back of the surplus contacts of the connection outlet used for connecting the line of a terminal GL device such as a telephone set is The monitoring contact is in an electrically different state when it is not connected, and a detection means for detecting a difference in the electrical state of the monitoring contact is provided on the station side.

(Function) According to the present invention, when the connection outlet is disconnected, the electrical state of the monitoring contact changes, and this is detected by the detection means on the station side.

(Embodiment) FIG. 1 shows an embodiment of the telephone connection status monitoring method according to the present invention. In the figure, EXT is terminal equipment on the subscriber side;
For example, it is a telephone, and LC is a line circuit, NW is a communication path, POT is a seat trunk, ATT is a relay stand, and AL
MIND is an alarm display panel, LAMPBOX is a telephone status display panel, and MAC is a computer with a CRT or typewriter.
A maintenance operation console using a CC is a control device that has a built-in memory and controls the entire system, and these have the same functions as devices on the well-known station (switching device) side. Also, CON is a connection outlet, and TS
C3C is a telephone connection status monitoring circuit.

The connection outlet CON is a well-known type used for line connection of terminal devices such as telephones, and as shown in FIG. 2, it consists of a male outlet C0Na on the telephone (terminal device) side and a female outlet C0Nb on the switching device side. Here, among the contacts of the connection outlet CON, two of the remaining (surplus) contacts that are not used for connection with the telephone line are used as monitoring contacts 81 and 82, and the terminal S on the male outlet C0Na side
1a and S2a are short-circuited, and the terminals S1b and S2b on the female outlet C0Nb side are respectively connected to the telephone connection state 8 monitoring circuit TSC8C via the remaining conductors of the telephone line (hereinafter referred to as control lines) A. be done.

The telephone connection circuit TSC8C constitutes a detection means for detecting a difference in the electrical state of the monitoring contacts, and sends connection state information of each telephone 111JEXT to the control device CC based on the detection result.

In the above configuration, when the male outlet C0Na of the connection outlet CON is disconnected from the female outlet CON b, the connections between the terminals S1a, S2a and the terminals S1b, S2b are cut, and the control line A becomes open.

The telephone connection state monitoring circuit TSC8C monitors the state of the connection outlet CON of the telephone EXT by checking for the presence or absence of a loop in the control line A.
8C identifies that the connection outlet CON of the telephone IEX King has been removed.

After identification, the control device CC is notified that the telephone EXT has been removed, and the control device CC identifies the number etc. of the removed telephone EXT, and based on that information, activates the alarm display panel ALMIND, making it visible and audible. to issue an alarm. Also, phone EX
If a telephone status display panel LAMPBOX compatible with T is provided, the status will be displayed using the corresponding lamp.

The telephone number, class, etc. are also displayed on the maintenance operation console MAC.

The corresponding telephone number is also displayed on the relay stand via the seat trunk POT.

When removing the telephone EXT for repair or replacement of the telephone,
Maintenance operation "Telephone connection status monitoring circuit TSC8C via control device CC by mantle operation from console MAC"
It is possible to send information to the telephone and not display a warning when the telephone is disconnected.

FIG. 3 shows a telephone connection status monitoring circuit TSC8 according to the present invention.
FIG. 2 is a circuit diagram showing an example of C. In the same figure, IC
O is a comparator, ICI is a D flip-flop, T
E L OF F is a relay, OC is a drive amplifier, AND
l, AND2. AND3 is an AND circuit, NAND is a NAND circuit, and INVl.

INV2.1NV3 is Il:zverter, teloNl
.

teloH2 is a relay OFF contact.

The ground potential in this circuit is sent to one side of the connection outlet 1-CON, for example, terminal S2, through the meter terminal, and is sent to terminal S1.
The signal is looped back to the O terminal of this circuit via , and sent to the comparator ■CO. When the connection outlet CON is connected, the output signal of the comparator ICO (position
5ETOFF) becomes the "shi" level. In this state, the relay TELOFF is inactive, and the output of the read data terminal RDATA is outputting a toddle bell.
The control device CC+ identifies that the telephone EXT is connected, and the alarm display panel ALMIND,
There is no display on the telephone status display panel I AMPBOX, relay stand ATT, or maintenance operation console MA CC9. When the telephone is removed, the loop at the connected outlet CON disappears and the input ground potential of the comparator ICO disappears, so that: the output signal of the comparator ICO (
SET OFF) becomes 118 I+ level,
The relay position OFF operates and the read data terminal RDA terminal △
The output becomes 'L' level. As a result, the control device CC
identifies that the telephone EXT has been removed, displays LMIND on the alarm display panel, and displays the telephone status display panel L A M P B
OX, T to the relay console]- and the maintenance operation console MAC, etc., to notify the supervisor, maintenance person d3, and the operator. Furthermore, in consideration of activating a display device, etc. owned by the customer, the contact point of the relay TEL OFF can be brought out to the outside in a non-voltage manner.

When a telephone is removed for repair or replacement, etc., based on a command input from the maintenance operation console MAC, the control device CC operates the D flip-flop ICI corresponding to the telephone, and outputs an output signal (INH). By setting the output signal of the comparator IGO to 1-'' level and gating the output signal of the comparator IGO (SET OFF), even if the output level of the comparator IGO changes, the AND circuit AN
The output of D1 is held so that it does not change. This IC,
Even if you remove 1st episode 11EXT, the alarm display panel ALMIND
, telephone status display panel I A M P B OX, relay stand ATT, maintenance operation stand MAC, etc. are not displayed. Further, since the relay setting OFF does not operate, the information is not displayed on a display device owned by the customer.

In addition, in the explanation C so far, the information from the telephone connection status monitoring circuit is sent as a signal to each display device via the control device CC of the switching device, but it is not possible to send the signal via another control device. You can also let it out.

(Effects of the Invention) As explained above, according to the present invention, surplus contacts of connection outlets of commonly used (commercially available) terminal devices such as telephones are used as contacts for monitoring connection/disconnection, and , a detection means for monitoring the information is combined, and this sends instructions to the control device, etc., and is displayed visually and audibly on the alarm display panel, telephone status display panel, relay stand, maintenance operation console, etc., so that the telephone It is possible to prevent the deterioration of service to the telephone user due to disconnection, and also to prevent theft of the telephone, and has the advantage that it can be effectively used in hotels, motels, lodges, pensions, etc.

[Brief explanation of the drawing]

FIG. 1 is a device configuration diagram showing an embodiment of the telephone connection state monitoring system according to the present invention, FIG. 2 is a schematic diagram of the telephone connection state, and FIG. 3 is an embodiment of the telephone connection state monitoring circuit. There is a block diagram C. EXT...Telephone, CON...Connection outlet 1~
, LC...line circuit, NW...communication path, POT/
...Seat trunk, ATT...Relay stand, CC...Control device, TSC8C...Telephone connection status monitoring circuit, A
...Control 1l111, ALMIND...Alarm display panel, LAMPBOx...Telephone status display panel, MAC...
・Maintenance console, IGO... comparator, I
C1...D flip-flop, set OFF...relay.

Claims (2)

[Claims] (1) Some of the surplus contacts of the connection outlet used for line connection of terminal devices such as telephones are used as monitoring contacts that have electrically different states when the outlet is connected and unconnected, and A telephone connection state monitoring system characterized in that a detection means for detecting differences in the electrical states of monitoring contacts is provided on the central office side. (2) When the connection outlet is disconnected, the device is visually and audibly displayed on an alarm display panel, telephone status display panel, relay stand, maintenance operation console, etc. telephone connection status monitoring method.