JPH05227564A - Remote monitor system for vehicle telephone exchange system - Google Patents

Abstract

PURPOSE:To operate a remote monitor by using an empty general communica tion line between a mobile switchboard and a radio control station. CONSTITUTION:When a call getting request to a moving object 1 is issued to a mobile switchboard 9, an incoming call is communicated from the mobile switchboard 9 through a general communication line 8, radio control station 7, normal communication line 5 to a radio base station 3, and the radio basic station 3 calls the moving object 1, so that a communication can be established. It is necessary to monitor a communication signal and a control signal in the radio control station 7 in order to test the state of the communication, and at the time of operating a monitor key 12 of the mobile switchboard 9, an empty line selecting circuit 11 selects an empty line in the general communication line 8, and connects it with a monitor device 10. The monitor device 10 operates the remote monitor of the signal of the radio control station 7 through the empty line. Thus, the economical burder can be saved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring system for an automobile telephone switching system for performing remote monitoring using an empty general telephone line between a mobile switching center and a radio control station.

[0002]

2. Description of the Related Art Conventionally, in a mobile telephone exchange system of this type, when a mobile switching center side remotely monitors a call signal and a control signal in a radio control station, a general call line is not provided between the mobile exchange station and the radio control station. A dedicated line was installed in the system, and the monitoring device installed in the mobile switching center was used to monitor it.

[0003]

In the above-described remote monitoring method of the conventional mobile telephone exchange system, the remote monitoring from the mobile switching center side of the call signal and the control signal in the radio control station is performed between the radio control station and the mobile switching center. Since it is performed from the monitor device using the leased line, the dedicated line for remote monitoring must be installed in addition to the general communication line, which is economically burdensome.

An object of the present invention is to monitor a call signal and a control signal in a radio control station without using a dedicated line for remote monitoring between the radio control station and a mobile switching center, and to utilize an idle line of a general call line. The purpose is to provide a remote monitor method for a car telephone exchange system that is performed by the above method.

[0005]

SUMMARY OF THE INVENTION A remote monitoring system for an automobile telephone switching system according to the present invention has a monitoring function of a voice signal and a control signal between a mobile switching center and a radio control station connected by a plurality of general telephone lines. The mobile switching center of an automobile telephone switching system having a monitor device provided with a free line selecting circuit for selecting a free line in the general call line, and a call state in the radio control station via the free line. Characterized by testing.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an automobile telephone exchange system showing an embodiment of the present invention.

When the mobile switching center 9 receives an incoming call request to the mobile unit 1, the mobile switching center 9 receives a call from the mobile switching center 9 through the general telephone line 8, the radio control station 7, and the general telephone line 5 to the radio base station 3. The wireless base station 3 calls the mobile unit 1 to establish a call.
In order to test the state of this call, it is necessary to monitor the call signal and the control signal in the radio control station 7. When the monitor key 12 of the mobile switching center 9 is operated, the idle line selection circuit 11 causes the general line 8 An empty line is selected and the line is connected to the monitor device 10. The monitor device 10 remotely monitors the signal of the wireless control station 7 through the idle line.

The monitor device 10 has the same function as that used in the conventional system.

[0009]

As described above, according to the present invention, the mobile switching center side can be used by utilizing the idle line of the general communication line without installing a dedicated line for remote monitoring between the radio control station and the mobile switching center. By remotely monitoring the call signal and the digital signal in the wireless control station from the installed monitor device, it is possible to reduce the economical burden.

[Brief description of drawings]

FIG. 1 is a block diagram of an automobile telephone exchange system showing an embodiment of the present invention.

[Explanation of symbols]

 1, 2 Mobile 3, 4 Radio base station 5, 6, 8 General communication line 7 Radio control station 9 Mobile switching center 10 Monitor device 11 Free line selection circuit 12 Monitor key

Claims (1)

[Claims] 1. The mobile switching center of a mobile telephone switching system in which a monitor device having a function of monitoring a voice signal and a control signal between a mobile switching center and a radio control station connected by a plurality of general telephone lines is installed. A remote monitor system for an automobile telephone exchange system, comprising: a free line selection circuit for selecting a free line in the general call lines, and testing a call state in the radio control station via the free line.