JPS63281550A - Remote control system for telephone system - Google Patents

Abstract

PURPOSE:To eliminate an exclusive-use telephone line for a remote control and to attain the remote control even when the call bus control part of a telephone device side is troubled by switching a line mutually the connection with the telephone device and the connection with a remote communication control part. CONSTITUTION:A change-over switch 8 connects always a telephone line L1 to a telephone device side. When a telephone device responds and a receiving detecting circuit 2 and a circuit 4 detects that the designation of the special number by a PB signal detecting circuit 4 is received, or when the condition without detecting the receiving response passes for a prescribed time, the telephone line L1 is switched to a control part 5 side by the switch 8, and a direct current loop circuit is formed by a direct current loop holding circuit 3. Here, the control part 5 responds after the switching of the switch 8, and on condition that the designation of the special number to the telephone device or the control part 5 is detected by the circuit 4, the communication information from the line L1 is received and controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a system for remotely controlling a telephone device equipped with a switching function, such as a key telephone device or a private branch exchange, for maintenance, operation, etc.

(Prior Art) Conventionally, remote control devices used in key telephone devices and private branch exchanges (PBXs) have two methods: one in which a telephone line is dedicated for the remote control device, the other in which the remote control device is connected to a telephone housing position. One of these methods was to receive calls from any telephone line to the extension number where the remote control device was housed.

(Problems to be Solved by the Invention) However, the former method uses a dedicated telephone line, resulting in poor utilization of the telephone line, while the latter method uses a telephone line to connect the remote control device. A communication path format with the button telephone device or PBX is required, and therefore, there is a problem that remote control cannot be performed if a failure occurs in the communication path of the button telephone device or PBX.

The present invention eliminates the problem of the utilization rate of the telephone line and the problem of control when a failure occurs in the call path control section of the button telephone device and PBX, and provides a telephone with excellent cost efficiency and reliability. The purpose is to provide a remote control method for devices.

(Means for Solving the Problem) In order to solve the above-mentioned problem, the present invention detects incoming calls from a telephone line and the presence or absence of a response in a remote control method for remotely controlling a telephone device equipped with a switching function. a number detection circuit that detects a special number dialed as a remote control designation from a telephone line; a remote communication control unit that controls reception of communication information on the telephone line; The connection with the remote communication control unit is provided with a changeover switch that mutually switches the connection, and the changeover switch always connects the telephone line to the telephone device side, and indicates that the telephone device has responded and that 11 special numbers have been specified. When detected by the detection circuit and the number detection circuit, or when a predetermined period of time has elapsed without detection of the response, the telephone line is switched to the remote communication control unit and connected, and the remote communication control unit responds within the predetermined time. The h-type responds after switching by the changeover switch when there is no telephone number, and controls the reception of communication information from the telephone line on the condition that the number detection circuit detects the designation of a special number for the telephone device or the remote communication control unit. And so.

(Function) According to the present invention, the telephone line is always connected to the telephone device side by a changeover switch, and when the telephone device responds to an incoming call from the telephone line and receives a designated special number, or The reception of communication information from the telephone line is controlled on the condition that the remote control unit receives the designation of the special number to be dialed.

(Embodiment) FIG. 1 is a block diagram of a remote communication system showing an embodiment of the present invention.

In the figure, 1 is a connection part with the telephone line LL side, 2 is an incoming call detection circuit that detects an incoming call from the telephone line Ll and a response to the incoming call, and 3 is a DC loop holding circuit. 4 is a PB signal detection circuit as a number detection circuit;
Detects the special number dialed by the PB double signal as a remote control designation from.

Reference numeral 5 denotes a communication control unit that supervises and controls this system, and controls the reception of communication information sent from the telephone line Ll to this remote communication system, and responds to incoming calls as described below. At the same time, on the condition that the PB signal detection circuit 4 detects a special number, the communication information is caused to be received by a receiving terminal (none of which is shown) via a separate modem or the like. A carrier detection circuit 6 detects a carrier received by the remote communication control section 5 and causes the remote communication control section 5 to perform reception control during the detection of the carrier. Reference numeral 7 denotes a connection portion to the line L2 side of a telephone device having an exchange function, such as a button telephone device or a PBX (none of which is shown). 8 is a changeover switch that always connects the telephone line Ll to the line 2 side of the telephone device, and when the incoming call detection circuit 2 detects that the telephone device has answered, the telephone device continues to receive the special number dialed as a remote control designation. When this is detected by the PB detection circuit 4, it is switched to the remote communication control unit 5 side, or the incoming call detection circuit 2 is switched to the remote communication control unit 5 side within a predetermined time after receiving the call.
When the telephone cannot detect a response from the telephone device, it switches to the remote communication control section 5 side. The remote communication control unit 5 also responds to the incoming call after the switching when there is no response within the predetermined time.

Next, the operation of the system shown in FIG. 1 will be explained. FIG. 2 is a flowchart showing this operation.

In the initial state, the changeover switch 8 connects the telephone line Ll to the line L2 side of the telephone device (step Sl).
. When the incoming call detection circuit 2 detects an incoming call from the telephone line Ll (S2), the remote communication control unit 5 monitors the duration of the incoming signal detection by the incoming call detection circuit 2, and disconnects the telephone device within a predetermined period of time, for example, 30 seconds. When there is a response and the incoming signal stops (S3), the remote communication control unit 5 monitors the PB signal detection by the PB signal detection circuit 4. As a result, when specifying a regular phone number with PB double signal (S
4) Communication using the telephone device is performed (S5).

In step S4, when the PB double signal special number is specified, the changeover switch 8 is switched and connected to the remote communication control unit 5 side by the remote communication control unit 5 (SS).
, the DC loop is held by the DC loop holding circuit 3 (S7). Subsequently, the remote communication control unit 5 monitors carrier detection by the carrier detection circuit 6, and during the carrier detection (S8), the remote communication control unit 5 controls reception of communication information from the telephone line L1 (S9).

In step S8, if no carrier is detected for a predetermined period of time, for example, 60 seconds or more, before or during the carrier detection, the holding of the DC loop is released (SIO) and the changeover switch 8 is connected to the line L2 side. (Sll) and exit.

In step S3, if there is no response from the telephone device within 30 seconds after receiving the call, the changeover switch 8 is connected to the remote communication control unit 5 side (S12), and the DC loop is maintained (S13). . Then, the remote communication control unit 5 responds to the incoming call (514) and monitors the PB double signal. As a result, when the PB double signal normal telephone number is specified (S15), the steps sto and sti are executed and the process ends.

When the PB double signal special number is specified in step S15, steps S8, S9, SIO
.

Sll controls the reception of communication information from telephone line Ll, and ends when no carrier is detected.

(Effects of the Invention) As explained above, according to the present invention, a dedicated telephone line is not required for remote control, and moreover, the telephone line can be connected to the telephone device and to the remote communication control unit. Since they are mutually switched, remote control is possible even in the event of a failure of the call path control section on the telephone device side, and a remote control device with excellent cost efficiency and reliability can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a telecommunications system showing an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the system of FIG. Ll... Telephone line L2... Telephone device line 2... Incoming call detection circuit 4... PB signal detection circuit (number detection circuit) 5... Remote communication control section 8... Changeover switch

Claims (1)

[Scope of Claim] A remote control method for remotely controlling a telephone device equipped with an exchange function, comprising: an incoming call detection circuit that detects an incoming call from a telephone line and the presence or absence of a response; and a dial as a remote control specification from the telephone line. a number detection circuit for detecting a special number; a remote communication control section for controlling reception of communication information on the telephone line; and a changeover switch for mutually switching the telephone line between connection with the telephone device and connection with the remote communication control section. Preparation: The changeover switch always connects the telephone line to the telephone device, and when the incoming call detection circuit and the number detection circuit detect that the telephone device has responded and received a special number designation, or when the telephone device has not detected the response. When a predetermined period of time has elapsed, the telephone line is switched to the remote communication control unit side for connection, and the remote communication control unit responds after switching the changeover switch due to no response within the predetermined time period, and connects the telephone line to the telephone device or the remote communication unit. 1. A remote control method for a telephone device, characterized in that reception of communication information from a telephone line is controlled on the condition that the number detection circuit detects a special number specified to a control unit.