JPS5854690B2 - Wireless telephone calling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a wireless telephone calling system, particularly to a wireless telephone calling system in an automatic switchboard accommodating a wireless telephone that can be connected using multiple carrier waves. .

(2) Background of the technology When multiple wireless telephones, which normally have a low call volume, are accommodated in an automatic exchange via a single wireless line, when the call volume increases rapidly due to an emergency disaster or other reasons, Occasionally, there may be cases where there is overcrowding.

As a countermeasure, a wireless line is temporarily added and some wireless telephones are relocated to the added line.

In this case, it is necessary to transmit the relocation information to both the automatic exchange and the wireless system without error.

If the information received by the automatic exchange and the wireless system is different, it will be impossible for the automatic exchange subscriber to connect to the wireless telephone.

Figure 1 is an example of a conventional relay system of this type.
1 and L2 are connected by numbers 21 and 23 from the automatic exchange joining device.

The wireless line accommodation system of each wireless telephone is transmitted from the management device ADM to the channel memo IJcHM of the automatic exchange and the wireless system control device CNT.

The control device CNT stores the accommodated line in the line memo IJML and ML2 of each radio telephone L1 and L2 using, for example, the carrier frequency f1.

For this reason, normally a radio telephone is used, and L2 is a radio line with carrier frequency f1 (hereinafter referred to as radio line f1).

) is connected to the automatic exchange.

In order to talk to the radio telephone L2, the participating device dials the number 23, for example, after making a connection.

Marker MKR receives the number 23 from the calling register OR, and as a result of checking it against the channel memo IJcHM, it learns that the wireless telephone L2 with the number 23 is accommodated in the wireless line f1, and captures the trunk TF and communicates with the caller. connect between

Next, the called party number unit digit 3 is sent from the originating sender O8 to the control device CNT via the trunk TF.

The control device CNT sends a calling signal to the called radiotelephone L2 via the radio line f1.

If the called party answers, the calling party is transferred to an automatic switchboard,
Calls can be made using Fl and the wireless line f1.

Next, in order to relieve congestion, carrier frequency f is added to wireless line f1 in addition to wireless line f1.
2θ wave line (hereinafter referred to as wireless line f2).

) and move the wireless telephone L2 to the wireless line f2.

The management device ADM transmits the new line accommodation method to the channel memory CHM of the automatic exchange and the wireless system control device CNT.

The control device CNT stores the new accommodated line in the line memos IJML1 and ML2 of each radio telephone L1 and L2.

When the participating device makes a call to the wireless telephone L2 in this state, the marker MKR receives the number 23 from the outgoing call register OR, and as a result of checking the number 23 in the channel memo IJcHM, the marker MKR receives the number 23 from the calling register OR.
The wireless telephone L2 learns that it is accommodated in the wireless line f2, seizes the trunk T F2, and establishes a connection with the calling party.

The called party number unit digit 3 is then sent from the originating center O8 via the trunk T F 2 to the control device CNT.

The control device CNT connects the called radio telephone L2? via the radio line f2. Send O1 output signal.

If the called party answers, the calling party is connected to the automatic switchboard and trunk T.
Calls can be made via F2 and wireless line f2.

(3) Prior art and problems Suppose that the contents of the automatic exchange channel memo IJCHM and the line memo ML2 of the wireless telephone L2 do not match for some reason (for example, due to the occurrence of a power failure, etc.).

For example, in channel memo IJcHM, wireless telephone L
Assume that the line memory ML2 stores that the wireless telephone L2 is being accommodated in the wireless line f1, although it is stored that the wireless telephone L2 is being accommodated in the wireless line f2.

If so, in the aforementioned connection the marker MKR sends the caller to the trunk T according to the instructions in the channel memo IJcHM.
F2 is connected to transmit the called party number unit digit 3 from the originating sender O8 to the control device CNT, but the called radio telephone L
2 recognizes that it is accommodated in the wireless line f1, so it cannot respond to the call via the wireless line f2, and from the point of view of the caller, it is in a non-responsive state.

(4) Purpose of the Invention The purpose of the present invention is to realize a wireless telephone calling system that allows an automatic exchange subscriber to connect to a wireless telephone by a method such as asking, even in the unlikely event of an accident.

(5) Structure of the Invention In order to achieve the above object, the present invention provides a management device that manages line usage, etc. in an automatic switching system that accommodates wireless telephones that can be connected using any of a plurality of carrier waves; It is equipped with a line memory that stores the accommodation line of the wireless telephone, a trunk connected to the wireless line, and a control device that performs calling control of the wireless telephone via the wireless line, and the trunk receives the calls after the trunk is activated. providing a non-response monitoring means for monitoring non-response of a wireless telephone for a certain period of time, and providing a path between the trunk and the control device to send a carrier wave switching activation signal when the non-response monitoring means detects a non-response;
Further, a transmission path of accommodation information for each radio telephone is provided from the line memory to the control device, and when the called radio telephone does not respond within a certain period of time, carrier wave switching information is transmitted to the called radio telephone. .

(6) Examples of the invention An embodiment of the present invention will be described below with reference to FIG.

The difference between FIG. 2 and FIG. 1 is that each trunk T F
A carrier wave switching write activation path SET is provided from t and TF2 to the control device CNT, and a channel memo IJCH
Each wireless telephone accommodation information transmission path L□, L2 is provided from M to the control device CNT.

Channel memo IJC based on the method of accommodating the wireless telephone to the wireless line transmitted from the management device ADM in FIG. 2
If the contents stored in the HM and the contents stored in the line memo IJML- of the radio telephone match, it is possible to make a telephone call as described in FIG.

In the unlikely event that the memory contents of channel memo IJcHM and line memo IJ
A calling method according to an embodiment of the present invention when the stored contents of ML- is different will be described below.

Channel memo IJCHM is now stored in wireless telephone L2 or wireless line f2, while line memory ML2
Assume that it is stored that the wireless telephone L2 is being accommodated on the wireless line f1.

After receiving the called party number 23 from the calling register OR, the marker MKR checks it against the channel memo 'JCHM, determines that the wireless telephone L2 is being accommodated in the wireless line f2, and uses the trunk TF2.
and the calling device.

The called party number unit digit 3 is sent from the originating sender O8 to the trunk T.
It is sent to the control device CNT via F2.

The control device CNT connects the wireless telephone L2 via the wireless line f2.
transmits a call signal to.

However, since the wireless telephone L2 itself recognizes that it is accommodated in the wireless line f1 from the contents of the line memory ML2, it cannot respond to calls via the wireless line f2.

When the unresponsive state elapses for a certain period of time, the trunk TF
2 activates the control device CNT using the route SET, and transfers the contents of the method of accommodating each wireless telephone to the wireless line stored in the channel memo IJcHM to the route L1.2. It is read by the control device CNT via L2.

The control device CNT sends the read accommodation method contents to the radio telephone ML2, that is, line switching information to all the lines used by the control device so as to use the radio line f2.

Alternatively, it is conceivable that a common control carrier wave for control purposes etc. is accommodated in each radio telephone, and each radio telephone is always in a state in which it can receive this common control wave.

Furthermore, when the line to be switched is the line that was originally allocated, this can be done simply by sending a recovery signal.

In this way, when the wireless telephone ML2 receives the above line switching information from the line in use, it updates the contents of the line memo 'J ML2 from fl to f2, and thereafter uses the wireless line f2 to make and receive calls. Let's do it.

Further, an embodiment of a portion related to transmission of carrier switching information will be explained in detail with reference to FIG.

When trunk TF2 is captured from marker MKR, relays B and OG, not shown in FIG. 3, are activated.

Assuming that the non-response monitoring time provided in the trunk is 3 to 6 minutes, when 0 to 3 minutes have elapsed after the trunk TF2 is captured and activated, a time limit circuit TM (known as a 3-minute discontinuation signal) common to the trunk is activated. (Can be used as a pickup circuit, etc.)
The earth signal first arrives at terminal 3MX, and relay PU in trunk switch F2 maintains operation, and then relay SET
also works.

After that, when the unresponsive state continues for 3 minutes, a ground signal arrives at the terminal 3MY of the time limit circuit TM, and the relay LO maintains its operation and restores the relay SET.

The relay SET is in a slow state due to the resistor R and the capacitor C, and during the recovery time it sends air to the terminal SET of the control device CNT.

The control device CNT connects the channel memory IJcHM to the terminal L1.
The line memos IJML1 and ML2 of each radio telephone L□ and L2 are updated via the radio line f1 and the radio line f2 of the control device CNT provided to the control device CNT and L2.

When the connection is normal, relay RA in trunk switch F2 is activated by the air coming from terminal RG2 of control device CNT in response to a response from the called radio telephone, so relays PU and SET are restored before relay LO is activated. , no activation signal is sent to terminal SET.

Through the above process, line memory ML2 of wireless telephone L2
The content of is changed to the state in which the wireless telephone L2 is accommodated in the wireless line f2, similar to the stored content of the channel memo IJcHM.

Therefore, when the joining device or wireless telephone L2 is selected next, the calling device and the called party L2 are connected via the automatic exchange, the trunk TF2, and the radio line f2.

Note that FIGS. 2 and 3 are only one embodiment of the present invention, and the effects of the present invention do not change even if the number of wireless telephones and wireless lines is two or more, for example.

(7) Effects of the Invention As described above, according to the present invention, there is provided a means for transmitting carrier wave switching information to the radio telephone when the called radio telephone does not respond within a certain period of time even in situations where it has conventionally been considered impossible to contact the radio telephone. A wireless telephone paging system is achieved.

[Brief explanation of drawings]

FIG. 1 is an example of a relay system according to the prior art, FIG. 2 is an example of a relay system according to an embodiment of the present invention, and FIG. 3 is a circuit diagram of an embodiment of the carrier switching information transmission part in FIG. . In the figure, the location... automatic switch subscriber, OR...
...Outgoing register, O8...Outgoing sender, MKR...Marker, CHM...Channel memory, TFL. TF2...Trunk, CNT...Control device, ADM...Management device, Li, L2...
...Wireless telephone, ML. ML2...Line memory, PU, LO, SET
, RA...Relay, R...Resistor, C.
...It is a power storage device.

Claims (1)

[Claims] 1. In an automatic switchboard that accommodates wireless telephones that can be connected using multiple carrier waves, a management device that manages line usage, etc., a line memory that stores the lines accommodated by the wireless telephone, and a device that is connected to the wireless line. A control device is provided for controlling calling of a radio telephone via a trunk and a radio line, and the trunk is provided with non-response monitoring means for monitoring non-response of the called radio telephone for a certain period of time after the trunk is activated, A path is provided between the trunk and the control device for transmitting a carrier wave switching start signal when a non-response is detected by the non-response monitoring means, and a path for transmitting information on accommodation of each radio telephone from the line memory to the control device is provided. . A radiotelephone calling system, characterized in that, if the called radiotelephone does not respond within a certain period of time, carrier wave switching information is transmitted to the called radiotelephone.