JPH02117259A - Simple data transmitter/receiver - Google Patents
Simple data transmitter/receiverInfo
- Publication number
- JPH02117259A JPH02117259A JP27146388A JP27146388A JPH02117259A JP H02117259 A JPH02117259 A JP H02117259A JP 27146388 A JP27146388 A JP 27146388A JP 27146388 A JP27146388 A JP 27146388A JP H02117259 A JPH02117259 A JP H02117259A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- station
- slave station
- receiving device
- tone signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 208000005809 status epilepticus Diseases 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は公衆電話回線を利用した簡易データ送受信装置
に関し、詳しくは産業システムの管理監視及び保安シス
テム等の各種センサによる情報を自動通報する簡易デー
タ送受信装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a simple data transmitting/receiving device using a public telephone line, and more specifically, a simple data transmitting/receiving device that automatically reports information from various sensors such as management monitoring and security systems of industrial systems. The present invention relates to a data transmitting/receiving device.
！當、大型コンピュータによるデータ送受信では、公衆
電話回線を利用するのが一般的である。この公衆電話回
線を利用したデータ送受信装置を第４図に示し説明する
。このデータ送受信装置は、子局（１）と親局（２）と
を公衆電話回線（３）を介して電話局の交換機（４）（
５）で接続する。上記子局（１）及び親局（２）は、ｃ
ｐｕ （中央演算処理装置）（６）（７）、モデム（８
）（９）及びＮＣＵ （網制御装置）（ｔｏ） （１
１）で構成される。! However, when sending and receiving data using large computers, public telephone lines are generally used. A data transmitting/receiving device using this public telephone line is shown in FIG. 4 and will be explained. This data transmitting/receiving device connects a slave station (1) and a master station (2) via a public telephone line (3) to a telephone exchange (4) (
5) Connect. The slave station (1) and the master station (2) are c
pu (central processing unit) (6) (7), modem (8)
) (9) and NCU (Network Control Unit) (to) (1
It consists of 1).
上記データ送受信装置によるデータ送受信は以下のよう
にして行われる。即ち、子局（１）においてＣＰＵ （
６）に入力されたデータはモデム（８）及びＮＣＵ（１
０）を介して電話局の交換機（４）（５）で公衆電話回
線（３）で伝送され、この子局（１）から送信されたデ
ータを親局（２）で受信する。この親局（２）では、デ
ータがＮＣＵ（１１）及びモデム（９）を介してＣＰＵ
（７）に送られ、このＣＰＵ （７）から出力される
。Data transmission and reception by the data transmission and reception device is performed as follows. That is, in the slave station (1), the CPU (
6) is sent to the modem (8) and NCU (1).
The data transmitted from the slave station (1) is received by the master station (2) through the telephone exchange (4) and (5) of the telephone office via the public telephone line (3). In this master station (2), data is sent to the CPU via the NCU (11) and modem (9).
(7) and output from this CPU (7).
ところで、前述したデータ送受信装置では、多量のデー
タを高速で送受信する場合に好適であるが、装置自体が
非常に高価であり、産業システムの管理監視や保安シス
テム等の各種センサによる情報を自動通報する場合のよ
うに、少量のデータの送受信では設備的に割高となって
不向きであった。By the way, the data transmitting and receiving device described above is suitable for transmitting and receiving a large amount of data at high speed, but the device itself is very expensive, and it is difficult to automatically report information from various sensors such as management monitoring of industrial systems and security systems. The equipment was expensive and unsuitable for sending and receiving small amounts of data, such as when sending and receiving small amounts of data.
そこで、本出願人は、先に、少量のデータを低速で送受
信する簡易データ送受信装置を提案している（特開昭６
２−２１４７６０．２１４７６１．２１４７６２．２７
９７７０号公報）。更に最近では、上記簡易データ送受
信装置で使用される通報手段において汎用性の向上が要
望されている。Therefore, the present applicant has previously proposed a simple data transmitting and receiving device that transmits and receives small amounts of data at low speed (Japanese Patent Laid-Open No. 6
2-214760.214761.214762.27
9770). Furthermore, recently, there has been a demand for improved versatility in the reporting means used in the above-mentioned simple data transmitting/receiving device.
それ故に、本発明は上記問題点に鑑みて提案されたもの
で、その目的とするところは、汎用性の向上を実現可能
にする簡易データ送受信装置を提供することにある。Therefore, the present invention has been proposed in view of the above-mentioned problems, and an object thereof is to provide a simple data transmitting/receiving device that can realize improved versatility.
本発明における上記目的を達成するための技術的手段は
、押しボタンダイヤル電話機でのＤＴＭＦ信号に基づく
トーン信号を子局から公衆電話回線で送信し、そのトー
ン信号を親局にて受信してＢＣＤ信号に変換する簡易デ
ータ送受信装置であって、上記子局での各種センサの入
力信号を含む各種データ信号を変換して子局から送信さ
れたトーン信号を受信し、そのデータ信号に基づく情報
を通報するメソセージ表示付き携帯用小型無線呼出し器
を付加した簡易データ送受信装置である。The technical means for achieving the above object of the present invention is to transmit a tone signal based on a DTMF signal in a push-button dial telephone from a slave station over a public telephone line, receive the tone signal at a master station, and transmit it to a BCD. A simple data transmitting/receiving device that converts various data signals including input signals of various sensors in the slave station, receives tone signals transmitted from the slave station, and transmits information based on the data signals. This is a simple data transmitting/receiving device equipped with a small portable radio paging device with a message display.
本発明に係る簡易データ送受信装置では、子局にて、各
種センサの入力信号を含む各種データ信号をＤＴＭＦ信
号に基づくトーン信号に変換する。このトーン信号を子
局から公衆電話回線、及び電話局の無線電話基地局を介
して無線で送信し、選定された携帯用小型無線呼出し器
で受信する。この小型無線呼出し器では、上記子局での
各種センサの入力データ信号に基づく情報をメツセージ
表示して通報する。In the simple data transmitting/receiving device according to the present invention, the slave station converts various data signals including input signals of various sensors into tone signals based on DTMF signals. This tone signal is transmitted wirelessly from the slave station via the public telephone line and the radio telephone base station of the telephone office, and is received by the selected portable small radio paging device. This small radio pager displays and reports information based on input data signals from various sensors in the slave station as a message.
本発明に係る簡易データ送受１ざ装置の一実施例を第１
図乃至第３図を参照しながら説明する。A first embodiment of a simple data transmission/reception device according to the present invention will be described below.
This will be explained with reference to FIGS. 3 to 3.
第１図に示す簡易データ送受信装置は、１対の子局（２
０）及び親局（２１）からなり、本発明の特徴はメソセ
ージ表示付き携帯用小型無線呼出し器＜２２） （以
下単にボケソ１−ヘルと称す〕を付加したことにある。The simple data transmitting/receiving device shown in Fig. 1 consists of a pair of slave stations (2
0) and a master station (21), and the feature of the present invention lies in the addition of a small portable radio paging device <22) (hereinafter simply referred to as Bokeso 1-Hel) with a message display.
上記子局（２０）において、（２３）はアナログ入力、
無電圧接点入力及びパルス入力等による自動通報用の各
（東センサ、（２４）は上記各種センサ（２３）が人力
接続された後述の自動通報装置、（２５）は既設の電話
機、（２６）は上記自動通報装置＜２４）及び電話＆’
３ｉ （２５）に接続された切り分は器で、電気的な妨
害発生等の万一の時に上記自動通報装置（２４）を回線
から切離す。In the slave station (20), (23) is an analog input;
Each (east sensor) for automatic notification using non-voltage contact input, pulse input, etc., (24) is an automatic notification device described later to which the above various sensors (23) are manually connected, (25) is an existing telephone, (26) is the above automatic notification device <24) and telephone &'
The disconnector connected to 3i (25) is a device that disconnects the automatic notification device (24) from the line in the unlikely event of electrical interference.
（２７）は上記切り分は器（２６）に接続された保安器
である。上記自動通報装置（２４）は、第２図に示すよ
うにＣＰＵ（２８）を内蔵し、各種センサ（２３）が接
続される入力端子のうち、アナログ入力端子と上記ＣＰ
Ｕ（２８）間にマルチプレクサ（２９）及びＡ／Ｄコン
バータ（３０）を接続する。また、電源入力端子とＣＰ
Ｕ（２８）間に電源切替部（３１）を接続する。一方、
上記ＣＰＵ（２Ｂ）の出力端子間に、電話機（２５）と
の自動回線切換えを実行する回線制御部（３２）、及び
押しボタンダイヤル電話機でのＤ Ｔ Ｍ Ｆ（Ｄｕａ
ｌ Ｔｏｎｅ Ｍｕｌｔｉ Ｆｒｅｑｕｅｎｃｙ
）信号に基づくトーン信号を発生させるＤ Ｔ Ｍ Ｆ
Ｉ Ｃ（３３）を接続する。また外部端子には、必
要に応じて設定″ａ（３４）が接続可能である。この設
定器（３４）は、テンキー操作等によりポケットベル（
２２）の識別コード番号等の初期データをＣＰＵ（２８
）に設定するものである。尚、図中、（３５）は通報要
因の発生時刻等の時計機能を有するタイムベース、（３
６）は在宅或いは不在状態を切換えるスイッチである。(27) is a protector connected to the container (26). The automatic notification device (24) has a built-in CPU (28) as shown in FIG. 2, and among the input terminals to which various sensors (23) are connected, the analog input terminal and the
A multiplexer (29) and an A/D converter (30) are connected between U (28). Also, the power input terminal and CP
A power supply switching unit (31) is connected between U (28). on the other hand,
Between the output terminals of the CPU (2B), there is a line control unit (32) that performs automatic line switching with the telephone (25), and a DTM F (Dua
l Tone Multi Frequency
) generates a tone signal based on the DTM F signal.
Connect IC (33). In addition, a setting device (34) can be connected to the external terminal as needed. This setting device (34) can be connected to a pager (
22) initial data such as the identification code number of the CPU (28).
). In the figure, (35) is a time base that has a clock function such as the time of occurrence of a reporting factor;
6) is a switch for switching between home and absence status.
次に第１図の親局（２１）において、（３７）は後述の
自動受信装置、（３８） （３９）は上記自動受信装
置（３７）に接続されたパーソナルコンピュータ及びプ
リンタである。上記自動受信装置（３７）は、第３図に
示すようにＣＰＵ（４０）を内蔵し、このＣＰＵ（４０
）を中心に、既設の電話１ａ （４１）との自動回線切
換えを実行する回線制御部（４２） 、ＤＴＭＦ／ＢＣ
Ｄ変換部（４３）、ＯＦＦフンクダイヤル・ＤＴＭＦ発
生信号制御部（４４） 、パーソナルコンピュータ（３
８）が接続されるＢ ＣＤ／Ｒ５２３２Ｃ変換部（４５
）、データメモリ部（４６） 、プリンタ（３９）が接
続されるプリンタＩ／Ｆ部（４７） 、電源部（４８）
及び必要に応して設定器（３４）が接続可能な設定器１
／Ｆ部（４９）で回路構成される。この設定器（３４）
は、前述した子局（２０）での自動通報装置（２４〕の
場合と同様、テンキー操作等によりタイヤルパルス種類
や電話番号等のデータをＣＰＵ（４０）等に設定するも
のである。Next, in the master station (21) in FIG. 1, (37) is an automatic receiving device which will be described later, and (38) and (39) are a personal computer and printer connected to the automatic receiving device (37). The automatic receiving device (37) has a built-in CPU (40) as shown in FIG.
), a line control unit (42) that performs automatic line switching with the existing telephone 1a (41), and DTMF/BC.
D conversion section (43), OFF dial/DTMF generation signal control section (44), personal computer (3
8) is connected to the B CD/R5232C converter (45
), data memory section (46), printer I/F section (47) to which the printer (39) is connected, power supply section (48)
and a setting device 1 to which a setting device (34) can be connected if necessary
/F section (49) constitutes a circuit. This setting device (34)
As in the case of the automatic notification device (24) in the slave station (20) described above, data such as the type of atyal pulse and telephone number are set in the CPU (40) etc. by operating the numeric keypad or the like.
本発明に係る簡易データ送受信装置では、第１図に示す
ように前述した子局（２０）と親局（２１）とを電話局
（５０） （５１）の交換機を介して公衆電話回線（
５２）で接続すると共に、メツセージ表示部（２２ａ）
を有するポケットベル（２２）を子局（２０）に無線電
話基地局（５３）を介して無線で接続する。In the simple data transmitting/receiving device according to the present invention, as shown in FIG.
52) and the message display section (22a).
A pager (22) having a mobile station (22) is wirelessly connected to a slave station (20) via a wireless telephone base station (53).
上記簡易データ送受信装置を使用するに先立って、子局
（２０）の自動通報装置（２４）に設定器（３４）を接
続し、ボケ−／ トベル（２２）の識別コード番号等の
初期データをＣＰＵ（２８）に設定する。Before using the above-mentioned simple data transmitting/receiving device, connect the setting device (34) to the automatic notification device (24) of the slave station (20) and input initial data such as the identification code number of the blur/tobel (22). Set to CPU (28).
簡易データ送受信装置の使用時、各種センサ（２３）の
いずれかから、アナログ入力、無電圧接点入力及びパル
ス入力によるデータ信号が自動通報袋Ｅ （２４）に入
力されると、ＣＰＵ（２８）の制御によりＩ線制御部（
３２）で自動回線切換えが実行されると共に、ＤＴＭＦ
Ｉ Ｃ（３３）で上記データ信号が押しボタンダイ
ヤル電話機でのＤＴＭＦ信号に基づくトーン信号に変換
される。このトーン信号は切り分は器（２６）及び保安
器（２７）を介して子局（２０）から、電話局（５０）
（５１）の交換機を介して公衆電話回線（５２）で
親局（２１）へ送信される。When using the simple data transmitting/receiving device, when a data signal from any of the various sensors (23) through analog input, non-voltage contact input, or pulse input is input to the automatic notification bag E (24), the CPU (28) The I-line control section (
32), automatic line switching is executed, and DTMF
The IC (33) converts the data signal into a tone signal based on the DTMF signal in the push-button dial telephone. This tone signal is sent from the slave station (20) to the telephone station (50) via the cutter (26) and protector (27).
It is transmitted to the master station (21) via the public telephone line (52) via the exchange (51).
上記親局（２１）の自動受信装置（３７）では、ＣＰＵ
（４０）の制御により回線制御部（４２）で自動回線切
換えして自動通報装置（２４）からの呼出しを自動検出
して回線を接続し、自ｒｉＪＪ通報用の各種センサ（２
３）によるデータ信号に基づくトーン信号を自動受信す
る。このＤＴＭＦ信号に基づくトーン信号は、ＤＴＭＦ
／ＢＣＤ変換部（４３）でＢＣＤ信号に変換され、パー
ソナルコンピュータ（３８）の使用時には、ＢＣＤ／Ｒ
３２３２Ｃ変換部（４５）でＲ３２３２Ｃ信号に変換さ
れて出力され、上記パーソナルコンピュータ（３８）に
て各種センサ（２３）に基つく情報がデータ処理される
。また、プリンタ（３９）の使用時には、プリンタＩ／
Ｆ部（４７）を介して出力され、上記プリンタ（３９）
によって各種センサ（２３）に基づ（情報が印字される
。In the automatic receiving device (37) of the master station (21), the CPU
Under the control of (40), the line control unit (42) automatically switches the line, automatically detects a call from the automatic notification device (24), connects the line, and various sensors (2
3) automatically receives a tone signal based on the data signal. The tone signal based on this DTMF signal is
/BCD converter (43) converts it into a BCD signal, and when using a personal computer (38), the BCD/R
The signal is converted into an R3232C signal by the 3232C converter (45) and output, and the information based on the various sensors (23) is data-processed by the personal computer (38). Also, when using the printer (39), the printer I/O
Output via the F section (47) and sent to the printer (39)
Information is printed based on various sensors (23).
上記トーン信号は、このように子局（２０）から電話局
（５０） （５１）を介して公衆電話回線（５２）で
親局（２１）へ送信される一方、無線電話基地局（５３
）を介して無線でポケットベル（２２）へも送信される
。上記ポケットベル（２２）では、子局（２０）で発生
した通報要因に応じた各種センサ（２３）でのデータ信
号に基づ＜ＤＴＭＦ信号のトーン信号を受信し、メツセ
ージ表示部（２２ａ）で上記データ信号に基づく情報を
表示して１ｉｌｌ報する。The tone signal is thus transmitted from the slave station (20) to the base station (21) via the telephone stations (50) and (51) over the public telephone line (52), while the tone signal is
) is also transmitted wirelessly to the pager (22). The pager (22) receives the tone signal of the DTMF signal based on the data signals from various sensors (23) corresponding to the reporting factors generated in the slave station (20), and displays the tone signal on the message display section (22a). Information based on the data signal is displayed and reported.
尚、上記実施例では、子局（２０）と親局（２１）が１
対１でポケットベル（２２）が１つの場合について説明
したが、本発明はこれに限定されることなく、１つの親
局に対して多数の子局（２０）（２０）−・−及びポケ
ットベル（２２） （２２）−を設けることも可能で
ある。In the above embodiment, the slave station (20) and the master station (21) are one
Although a case has been described in which there is one pager (22) in a one-to-one relationship, the present invention is not limited to this, and the present invention is not limited to this. (22) It is also possible to provide (22)-.
本発明に係る簡易データ送受信装置では、子局での各種
センサによって得られた情報を通報するポケットベルを
付加したから、親局のような固定局に限らず、上記ポケ
ットベルを移動局として任意の場所にて情報を認知する
ことができ、少量のデータの送受信においては設備的に
も安価で汎用性に富む簡易データ送受信装置を提供でき
る。このような簡易データ送受信装置は、ガス、水道、
電気の自動検針、ＦＡ稼動管理の異常監視、冷凍・冷蔵
設備の温度管理等の産業システムの管理監視や、在宅病
人の安全管理、火災警報等の保安システムに応用すれば
その効果は大である。In the simple data transmitting/receiving device according to the present invention, since a pager is added to report information obtained by various sensors in the slave station, the pager can be used as a mobile station, not only in a fixed station such as a master station. It is possible to provide a simple data transmitting/receiving device that is inexpensive in terms of equipment and has high versatility when transmitting and receiving small amounts of data. This kind of simple data transmitting and receiving device can be used for gas, water,
It will be very effective if applied to automatic meter reading of electricity, abnormality monitoring of FA operation management, management and monitoring of industrial systems such as temperature control of freezing and refrigeration equipment, safety management of sick people at home, security systems such as fire alarms, etc. .
第１図は本発明に係る簡易データ送受信装置の一実施例
を示す概略構成図、第２図は第１図の簡易データ送受信
装置の子局を示すブロック図、第３図は第１図の簡易デ
ータ送受信装置の親局を示すプロ、り図である。
第４図はデータ送受信装置の従来例を示す概略構成ブロ
ック図である。
（２０） −・子局、 （２１）−親局、（２
２） −メツセージ表示付き携帯用小型無線呼出し器（
ポケットベル）、
各種センサ、1 is a schematic configuration diagram showing an embodiment of a simple data transmitting/receiving device according to the present invention, FIG. 2 is a block diagram showing a slave station of the simple data transmitting/receiving device of FIG. 1, and FIG. 3 is a block diagram showing an example of the simple data transmitting/receiving device of FIG. FIG. 3 is a professional diagram showing a master station of the simple data transmitting/receiving device. FIG. 4 is a schematic block diagram showing a conventional example of a data transmitting/receiving device. (20) - Slave station, (21) - Master station, (2
2) - Portable small radio pager with message display (
pagers), various sensors,
Claims (1)
づくトーン信号を子局から公衆電話回線で送信し、その
トーン信号を親局にて受信してＢＣＤ信号に変換する簡
易データ送受信装置であって、 上記子局での各種センサの入力信号を含む各種データ信
号を変換して子局から送信されたトーン信号を受信し、
そのデータ信号に基づく情報を通報するメッセージ表示
付き携帯用小型無線呼出し器を付加したことを特徴とす
る簡易データ送受信装置。(1) A simple data transmitting/receiving device that transmits a tone signal based on a DTMF signal from a push-button dial telephone over a public telephone line from a slave station, receives the tone signal at a master station, and converts it into a BCD signal, Converting various data signals including input signals of various sensors in the slave station and receiving tone signals transmitted from the slave station,
A simple data transmitting/receiving device characterized by adding a portable small radio pager with a message display that reports information based on the data signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27146388A JPH02117259A (en) | 1988-10-26 | 1988-10-26 | Simple data transmitter/receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27146388A JPH02117259A (en) | 1988-10-26 | 1988-10-26 | Simple data transmitter/receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02117259A true JPH02117259A (en) | 1990-05-01 |
Family
ID=17500387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27146388A Pending JPH02117259A (en) | 1988-10-26 | 1988-10-26 | Simple data transmitter/receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02117259A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06284078A (en) * | 1990-09-28 | 1994-10-07 | American Teleph & Telegr Co <Att> | Method for programming radio telephone set, and programmable radio telephone set |
| US7202800B2 (en) | 2002-07-12 | 2007-04-10 | Lg Electronics Inc. | Mobile communication-based remote meter reading system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61100071A (en) * | 1984-10-22 | 1986-05-19 | Omron Tateisi Electronics Co | Information transmission system using telephone set |
| JPS62214762A (en) * | 1986-03-14 | 1987-09-21 | Takemoto Denki Keiki Kk | Simple data source and sink |
-
1988
- 1988-10-26 JP JP27146388A patent/JPH02117259A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61100071A (en) * | 1984-10-22 | 1986-05-19 | Omron Tateisi Electronics Co | Information transmission system using telephone set |
| JPS62214762A (en) * | 1986-03-14 | 1987-09-21 | Takemoto Denki Keiki Kk | Simple data source and sink |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06284078A (en) * | 1990-09-28 | 1994-10-07 | American Teleph & Telegr Co <Att> | Method for programming radio telephone set, and programmable radio telephone set |
| US7202800B2 (en) | 2002-07-12 | 2007-04-10 | Lg Electronics Inc. | Mobile communication-based remote meter reading system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MY133118A (en) | System for alerting portable communication device used of incoming call | |
| EP0713316B1 (en) | Wireless communication apparatus | |
| JPH02117259A (en) | Simple data transmitter/receiver | |
| US5289524A (en) | Data transmission method and unit | |
| US5293418A (en) | Mobile terminal equipment capable of storing called state | |
| JPH0734563B2 (en) | Cordless phone | |
| GB2304002A (en) | A communication device operating as a mobile telephone, pager, two way radio, baby monitor etc. | |
| JP2627321B2 (en) | Control channel setting method for cordless button telephone equipment | |
| JPH02117256A (en) | Simple data transmitter/receiver | |
| JP2771555B2 (en) | Simple data transmission / reception method | |
| JPH01173199A (en) | Supervising system | |
| JP3931411B2 (en) | Power monitoring system | |
| JPH02278955A (en) | Monitoring system giving notice to pocket bell and facsimile equipment | |
| JPH05236551A (en) | Ha system | |
| KR0141746B1 (en) | Interface card for interphones | |
| JPH10294807A (en) | Mobile communication system | |
| JP2830612B2 (en) | Call control system | |
| CN115833900A (en) | Data transmission method based on Beidou communication equipment | |
| KR930006418B1 (en) | Wireless remote checking system & control method | |
| KR0164362B1 (en) | Bidirectional wireless paging system | |
| JP2002208081A (en) | Security system and its security terminal | |
| JPH0575730A (en) | Electronic private branch exchange | |
| JPS62214760A (en) | Simple data transmission and reception system | |
| JPH10327440A (en) | Bidirectional paging system and mobile communication terminal equipment | |
| JPH1093721A (en) | Radio communication system for home equipment |