JPS6046627A - Car telephone exchanging system having paging function - Google Patents

Abstract

PURPOSE:To expand a communication area also for a subscriber who has left a car by adding a function for calling a pager (pocket bell) carried by a car telephone subscriber to a car telephone exchange. CONSTITUTION:A car telephone subscriber's (A02) No. dialled by a subscriber B99 is received by an exchange 22 and calling codes 35, 36 are sent from car telephone radio transmitters 31, 32 in service areas 11, 12. Since the radio receivers 31, 32 do not receive a response code from the subscriber A02, an exchange 21 translates whether a subscriber A01 who has left a car 100 carries a pager or not from the subscriber's data and sends calling codes from paging radio transmitters 51, 52 to call a pager 03.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a wireless telephone switching system, particularly a mobile telephone switching system and a paging (pager) system. When there is an incoming call, the exchange identifies that the mobile phone subscriber is absent, and then notifies the originating subscriber of his/her absence via a fixed message or the like.

In other words, no further communication could be expected between the calling subscriber and the car phone subscriber who received the call.

<Purpose of the invention> The purpose of the invention is to extend communication to subscribers who are away from their cars by adding a device to a car telephone exchange to call the pager owned by the car phone subscriber. The purpose of this invention is to provide a car telephone switching system that makes it possible to

<Summary of the Invention> According to the present invention, a paging system device is added to a car telephone exchange, and a car phone subscriber can also use a pager.
If an incoming call to a car phone subscriber is not established, the incoming call is automatically switched to a paging call and the pager of the car phone subscriber is called. This makes it possible to contact absent car phone subscribers. A pager with a display section that can display the caller's number and message is effective as this pager.

<Example> Next, an example of the present invention will be described with reference to the drawings. As an example, referring to FIG. 1, when the general telephone subscriber B99 shown on the right side of the figure calls the automobile telephone subscriber AO2, the subscriber AO2 is not present in the automobile 100 and the pager is turned off.
A case where the user is away from the car 100 with 03 will be explained.

Subscriber B99 dials the telephone number of car telephone subscriber AO2, and the exchange device 21 side sends and receives the dialed digits via local telephone exchange 98 in the same manner as in the general telephone exchange network. This embodiment uses MFC (Multi-Frequency Code) signaling, and switching equipment 21 is also capable of receiving the telephone number of originating subscriber B99.

The switching device 21, which has received the number of the mobile telephone subscriber AO2 via the incoming trunk 24, sends a calling signal 33° to the mobile telephone radio transmitter 31.32 in the service area 11.12 in order to call the subscriber AO2'e. 34 through relay devices 25 and 26, respectively. These car telephone radio transmitters 3'l, 32 send out calling codes 35 and 36, respectively, to call the subscriber AO2.

Since the subscriber AO2 is absent from the automobile 100, the wireless receivers 31, 32 do not receive a response code from the subscriber AO2, so the switching device 21 determines that the subscriber AC+2 is absent from the automobile 100. The switching device 21 is connected to the pager of the subscriber A01 who is away from the automobile 100.
03 is in possession of the subscriber, and in order to call the pager 03, the paging radio transmitter 5 in the service area 11.12 transmits the call signal 37.
1.52 through the control device 41. In this embodiment, the subscriber B9 received the MFC signal in the calling signal 37.
9's phone number will also be sent.

The paging radio transmitters 51 and 52 use a calling code 38 to call the pager 03 owned by the subscriber AOI.
．． 39-Q are sent respectively. At this time, the telephone number of subscriber B99 is also sent. Pager 03 receives the call code 38.39 and the phone number and makes a tone (ringing tone).
At the same time, the telephone number of subscriber B99 is displayed on the display section to notify that subscriber J399 has called. - If necessary, the switching device 21 can make the calling subscriber B9.9 hear a message saying "Due to the absence of 11, the pager has been called".Also, in combination with a pager with a message, the switching device 21 can make the calling subscriber B9. , it is also possible to convey the intention of subscriber B99 to subscriber AOI.

In FIG. 1, 22 is the main control device of the exchange device 21;
23 indicates a switching network.

<Effects> As explained above, this invention has the effect of allowing communication even to subscribers who are not in a car by combining the car telephone switching system and the paging switching system.

[Brief explanation of the drawing]

FIG. 1 illustrates an embodiment of the present invention. 01.02: Car phone subscriber, 02 is subscriber in the car,
01 indicates that the person has pager 03 and is outside the vehicle.
03: Pager with display 111, 12: Service area, 21: Switching device, 22: Main control device, 23 Niswitching network, 24: Incoming trunk, 25.
26: Relay device for wireless equipment and switching equipment, 31. 32: Transmitter/receiver for car phone, 33. 34: Car phone calling signal, 35, 36: Car phone calling code, 37
: pager ringing signal (including calling number), 38.
39: Pager calling code (including calling number),
41: paging transmitter control device, 51, 52: paging transmitter, 982 local telephone exchange, 992 general subscriber telephone. Patent applicant: Takashi Kusano, representative of NEC Corporation

Claims (1)

[Claims] (1) A paging exchange device is added to the car telephone exchange, and whether or not the car phone subscriber has a pager is stored in the subscriber data, and when an incoming call to the car phone subscriber is received, When the establishment of an incoming call is detected, it is checked from the subscriber data of the car phone subscriber whether or not he or she has a pager, and if the car phone subscriber does have a pager, the incoming call is changed to a paging call and the car phone subscription is changed to a paging call. A car telephone exchange system with a paging function that calls up a pager owned by a person.