JPH0750905B2 - Cordless telephone device - Google Patents

Cordless telephone device

Info

Publication number
JPH0750905B2
JPH0750905B2 JP62309888A JP30988887A JPH0750905B2 JP H0750905 B2 JPH0750905 B2 JP H0750905B2 JP 62309888 A JP62309888 A JP 62309888A JP 30988887 A JP30988887 A JP 30988887A JP H0750905 B2 JPH0750905 B2 JP H0750905B2
Authority
JP
Japan
Prior art keywords
mobile station
base station
call
charger
circuit
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.)
Expired - Lifetime
Application number
JP62309888A
Other languages
Japanese (ja)
Other versions
JPH01151345A (en
Inventor
勇 松田
研造 三浦
博 河辺
正 大森
康治 岸間
敏晴 稲本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62309888A priority Critical patent/JPH0750905B2/en
Publication of JPH01151345A publication Critical patent/JPH01151345A/en
Publication of JPH0750905B2 publication Critical patent/JPH0750905B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、電話回線に接続された基地局と、この基地局
に無線で接続される移動局より成るコードレス電話装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone device including a base station connected to a telephone line and a mobile station wirelessly connected to the base station.

従来の技術 従来、コードレス電話機装置において、基地局に移動局
の内蔵電池を充電する機能を持ったものは、基地局側に
用意した機械式のフックスイッチにより、移動局のオン
フックを検出し通話を切断する方法や、移動局側で、電
池の充電電流を検出して、無線回路電源を切断し、基地
局にて、移動局からの電波が停止した事を検出し通話を
切断する方法が用いられている。第2図は前述の機械式
のフックスイッチを使用する装置の例であり、1は移動
局、2は基地局、3は前記移動局1を基地局2に置く事
により接点4を開く機械式のフックスイッチであり、5
は通話回路、6は無線受信回路、7は無線送信回路、8
は空中線である。そして、この場合は移動局1で通話後
終話の操作をせずにそれを基地局2に置くと、フックス
イッチ3が下り、接点4が開き、通話路を切断し終話さ
れるように構成されている。
2. Description of the Related Art Conventionally, a cordless telephone device that has a function of charging a built-in battery of a mobile station in a base station detects a mobile station's on-hook by using a mechanical hook switch prepared on the base station side and makes a call. The method of disconnecting is used, or the mobile station detects the charging current of the battery to disconnect the wireless circuit power supply, and the base station detects that the radio wave from the mobile station has stopped and disconnects the call. Has been. FIG. 2 shows an example of a device using the above-mentioned mechanical hook switch. 1 is a mobile station, 2 is a base station, and 3 is a mechanical system in which the contact 4 is opened by placing the mobile station 1 in the base station 2. Is a hook switch of 5
Is a call circuit, 6 is a wireless reception circuit, 7 is a wireless transmission circuit, 8
Is an antenna. Then, in this case, if the mobile station 1 puts it on the base station 2 without performing an operation for ending the call after the call, the hook switch 3 goes down, the contact 4 opens, and the call path is cut off so that the call can be ended. It is configured.

第3図は、移動局1側で電池12の充電電流を検出して終
話処理を行なう装置の例であり、9は、無線受信回路6
からのキャリアー情報を受けて、移動局1からの電波が
停止したならば、接点4を開く制御回路であり、10は、
基地局2から移動局1の電池12を充電する為の電流を供
給する接点であり、11は、電池12の充電電流を検出し、
スイッチ13を開く制御回路であり、スイッチ13は電池12
から無線部への電源を入,切するためのものである。14
は無線回路であり15は移動局1から基地局2への電波で
ある。そして、この場合は前述の場合と同様に、移動局
1の終話操作を行なわずに移動局1を基地局に置くと、
接点10が接触し、電池12が基地局内の電源から接点10を
経由して充電される。この充電電流を検出して、制御回
路11がスイッチ13を開き、無線部14の電源を切断するの
で、移動局の無線送信が停止する。一方、基地局2で
は、通話中は常に受信回路6からのキャリアー情報を監
視しているため、移動局1からの電波が停止すると制御
回路9は、接点4を開き通話を終了させる。
FIG. 3 shows an example of an apparatus for detecting the charging current of the battery 12 on the side of the mobile station 1 to perform a call termination process, and 9 is a radio receiving circuit 6
Is a control circuit that opens the contact 4 when the radio wave from the mobile station 1 is stopped by receiving the carrier information from
Reference numeral 11 is a contact point for supplying a current for charging the battery 12 of the mobile station 1 from the base station 2, 11 is for detecting the charging current of the battery 12,
It is a control circuit that opens the switch 13, and the switch 13
This is for turning on and off the power supply from the to the wireless unit. 14
Is a radio circuit, and 15 is a radio wave from the mobile station 1 to the base station 2. Then, in this case, as in the case described above, if the mobile station 1 is placed in the base station without performing the ending operation of the mobile station 1,
The contacts 10 make contact and the battery 12 is charged from the power supply in the base station via the contacts 10. Upon detection of this charging current, the control circuit 11 opens the switch 13 and turns off the power of the wireless unit 14, so that the wireless transmission of the mobile station is stopped. On the other hand, since the base station 2 constantly monitors the carrier information from the receiving circuit 6 during a call, when the radio wave from the mobile station 1 stops, the control circuit 9 opens the contact 4 and ends the call.

この様に、上記従来の装置でも、移動局1で終話操作す
る事なしに、そのまま基地局2に置いても、通話を終了
させる事ができ、第2図の場合には更に、移動局1の無
線部等の電源を切断することができるため、充電時の無
効な電流消費を防ぐ事も可能である。
As described above, even with the above-mentioned conventional apparatus, the call can be terminated even if the mobile station 1 is placed on the base station 2 without performing a call end operation. In the case of FIG. Since the power supply of the wireless unit 1 and the like can be cut off, it is also possible to prevent invalid current consumption during charging.

発明が解決しようとする問題点 しかしながら、従来の装置では、移動局1を基地局2に
置く事により充電する場合は機能するが、基地局2とは
別に充電の目的だけに用意した充電器に移動局1を置い
た場合には終話動作ができなかった。また前述の移動局
の電波の停止を検出して終話処理する方法に於ては、移
動局が、基地局から離れて通話している時など、基地局
にて移動局からの電波が一時的に弱まった場合誤って通
話を切断していまうという問題があった。
DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, the conventional device functions when the mobile station 1 is placed in the base station 2 for charging, but a charger provided only for the purpose of charging separately from the base station 2 is used. When the mobile station 1 was placed, the call termination operation could not be performed. In addition, in the method of detecting the stop of the radio wave of the mobile station and terminating the call, when the mobile station is talking from the base station, the radio wave from the mobile station is temporarily lost at the base station. There was a problem that the call was accidentally disconnected when it weakened.

本発明はこの様な従来の問題を解決するものであり、移
動局を基地局、充電器のどちらで充電状態にしても確実
に終話処理を行なう優れたコードレス電話機を提供する
ことを目的とするものである。
The present invention solves such a conventional problem, and an object of the present invention is to provide an excellent cordless telephone that surely ends a call regardless of whether the mobile station is charged by the base station or the charger. To do.

問題点を解決するための手段 本発明は、上記目的を達成するために、移動局側に電池
の充電状態を検出する検出回路を設け、この出力を移動
局に内蔵された、通話の開始および終話の制御、内部回
路の電源の制御および基地局とのデータ伝送を制御する
マイクロコンピュータに入力して、基地局に対して、通
常の終話操作によって発生する終話データと同様のデー
タを無線伝送することによって、基地局にて、通話路を
開き、終話するように構成したものである。
Means for Solving the Problems In order to achieve the above object, the present invention provides a detection circuit for detecting the state of charge of a battery on the mobile station side, the output of which is built into the mobile station to start and Input to the microcomputer that controls the end call control, the control of the power supply of the internal circuit and the data transmission with the base station, to the base station, the same data as the end call data generated by the normal end call operation is input. The base station opens the communication path by wireless transmission and ends the call.

作 用 したがって、本発明によれば、移動局を基地局、充電器
のどちらに置いても、その充電状態を移動局内の検出回
路より、制御用のマイクロコンピュータに通知して、通
常の終話操作と変わりない終話データを送信する事によ
って、基地局で、確実な終話が行なえ、また、基地局で
の移動局からの電波受信が一時的に弱わまっても誤って
終話動作する事も無くなるという作用を有する。
Therefore, according to the present invention, regardless of whether the mobile station is placed in the base station or the charger, the detection circuit in the mobile station notifies the control microcomputer of the state of charge, and the normal termination By transmitting the end-call data that is the same as the operation, the base station can reliably end the call, and even if the reception of radio waves from the mobile station at the base station is temporarily weakened, the end-call operation is mistaken. It also has the effect of eliminating things to do.

実施例 第1図は本発明の実施例の構成を示すものである。第1
図において、1は移動局、2は基地局、4は通話の接
続、切断を行なう接点、5は通話回路、6は無線受信回
路、8は空中線、10は基地局から移動局の電池に充電電
流を供給する接点、12は移動局の電源である充電式の電
池、13は無線部及び通話回路への電源を入,切するスイ
ッチであり、14は無線送信回路、15は移動局から基地局
への電波であり、16は、移動局からの無線データの復調
回路、17は基地局側の制御を行なうマイクロコンピュー
タ18は移動局側の制御を行なうマイクロコンピュータで
あり、19は充電状態を検出する回路、20は移動局の通話
回路、21は無線受信回路、22は送話器、23は受信器、24
は通話状態を示す表示器、25は移動局を基地局以外で充
電することを目的とした充電器であり、26は充電器よ
り、移動局の電池に充電流を供給する接点である。
Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. First
In the figure, 1 is a mobile station, 2 is a base station, 4 is a contact for connecting and disconnecting a call, 5 is a call circuit, 6 is a radio receiving circuit, 8 is an antenna, 10 is a base station, and the battery of the mobile station is charged. A contact for supplying current, 12 is a rechargeable battery that is the power source of the mobile station, 13 is a switch for turning on and off the power to the wireless unit and the communication circuit, 14 is a wireless transmission circuit, and 15 is a base station from the mobile station. 16 is a demodulation circuit for radio data from the mobile station, 17 is a microcomputer for controlling the base station side, 18 is a microcomputer for controlling the mobile station side, and 19 is a charging state. Detecting circuit, 20 is a mobile station communication circuit, 21 is a wireless receiving circuit, 22 is a transmitter, 23 is a receiver, 24
Is a display for indicating a call state, 25 is a charger for charging the mobile station other than the base station, and 26 is a contact for supplying a charging flow from the charger to the battery of the mobile station.

上記構成において、移動局1を基地局2に置くと接点10
を通して、電池12を充電することができ、また電器25に
置いた場合には接点26を通して電池を充電する事ができ
る。この移動局1において、通話を行なう場合には、基
地局2または、充電器25より取り上げて使用する。通話
が終わり、移動局の使用者が終話の操作をする事なし
に、基地局2に置いた場合は接点10を通して、電池12に
充電電流が流れるためこれが検出回路19で検出されマイ
クロコンピュータ18に通知される。マイクロコンピュー
タ18は通常の終話操作入力時と同様に、無線送信回路14
に終話データを出力する。終話データは空中線8より電
波15となって、基地局の空中線8に伝達され無線受信回
路6で受信され復調回路16で復調され、基地局2側のマ
イクロコンピュータ17に入力され、終話処理が実行され
ると、接点4を開いて終話する。一方、移動局1側で
は、終話データ送出後、無線送信回路14、通話回路20の
電源を切断すべく、スイッチ13を切り、表示器24を消灯
して待受状態になる。同様に移動局1を充電器に置いた
場合は、接点26を通して充電電流が流れて終話処理が行
なわれる。
In the above configuration, when the mobile station 1 is placed on the base station 2, the contact 10
Through which the battery 12 can be charged, and when placed on the electric appliance 25, the battery can be charged through contacts 26. When making a call at the mobile station 1, the mobile station 1 is picked up from the base station 2 or the charger 25 and used. When the call ends and the user of the mobile station does not operate the end of the call, when placed in the base station 2, a charging current flows to the battery 12 through the contact 10, and this is detected by the detection circuit 19 and is detected by the microcomputer 18. Will be notified. The microcomputer 18 operates the wireless transmission circuit 14 in the same manner as when the normal end operation is input.
The end call data is output to. The end-call data becomes a radio wave 15 from the antenna 8, is transmitted to the antenna 8 of the base station, is received by the wireless reception circuit 6, is demodulated by the demodulation circuit 16, is input to the microcomputer 17 on the base station 2 side, and the end-call processing is performed. Is executed, the contact 4 is opened to end the call. On the other hand, on the mobile station 1 side, after transmitting the call end data, the switch 13 is turned off to turn off the power of the radio transmission circuit 14 and the call circuit 20, and the display 24 is turned off to enter the standby state. Similarly, when the mobile station 1 is placed in the charger, the charging current flows through the contact 26 and the call ending process is performed.

この様に移動局の終話操作なしでも、基地局、充電器の
いずれかに置いて、移動局を充電状態とすれば、自動的
に基地局に対して終話データが送出され、確実に終話処
理される。また、移動局は待受状態となり、無効な電源
の消費も少なくなる。
In this way, even if the mobile station is not terminated, if the mobile station is placed in either the base station or the charger and the mobile station is charged, the termination data is automatically sent to the base station, ensuring that The ending call is processed. In addition, the mobile station is in a standby state, and the consumption of ineffective power is reduced.

発明の効果 本発明は、上記実施例より明らかなように、以下に示す
効果を有する。
EFFECTS OF THE INVENTION The present invention has the following effects, as is apparent from the above-mentioned embodiments.

(1) 局線と通話後、終話操作をせずに移動局を基地
局または充電器に置いても、移動局にて、充電状態を検
出して、終話データを基地局に送信するので、基地局に
置いた場合のみならず、充電器に置いた場合も確実に終
話動作することができる。
(1) Even if the mobile station is placed on the base station or charger after the call with the station line without performing the call end operation, the mobile station detects the charging state and transmits the call end data to the base station. Therefore, not only when placed in the base station but also when placed in the charger, the call end operation can be reliably performed.

(2) 基地局における移動局からの受信電波の強さの
検出による、電波が切れた場合の処理を上記の充電時と
分けて、移動局の電池切れ等の異常時用に使用でき、多
少受信電波が弱くなっても終話処理しない様にできるの
で、一時的に電波の通達が悪くなっても終話してしまう
事がなくなる。
(2) The base station detects the strength of the radio wave received from the mobile station and separates the processing when the radio wave is cut off from the above charging, and can be used for abnormalities such as battery exhaustion of the mobile station. Even if the received radio wave weakens, it is possible to prevent the end call processing from being performed, so that even if the radio wave notification temporarily deteriorates, the call will not end.

(3) 局線との通話時の終話処理に限らず、移動局と
基地局間のインターホン通話時にも同様に動作させる事
ができる。
(3) The same operation can be performed not only in the call termination processing at the time of a call with the station line but also at the intercom call between the mobile station and the base station.

(4) 通話の開始、終了を操作する移動局のスイッチ
に、ロック式の物を使用すれば、充電により終話処理を
行なった場合、スイッチは通話側に設定されたままなの
で、この後、移動局を取り上げ、充電状態を解除すれ
ば、通話スイッチ状態を入力して、操作する事なしに、
自動的に局線を捕捉させる事ができ、前述(1)の効果
と合わせて通常の有線電話機と同じ感覚で使用すること
ができる。
(4) If a lock-type object is used for the switch of the mobile station that controls the start and end of the call, the switch remains set to the call side when the call end processing is performed by charging. If you take the mobile station and release the charging state, you can enter the call switch state and operate it,
The local line can be automatically captured, and combined with the effect of (1), it can be used with the same feeling as an ordinary wired telephone.

(5) 移動局と基地局または充電器に置いて充電状態
にしている場合、その充電情報をマイクロコンピュータ
に入力しているので、必要最小限の回路を残して他の回
路の電源を切断する事ができるので、移動局の電源スイ
ッチの入,切時の回路電流の差が少なくなるので、電池
に流れる電流の変化も少なく、電池を効率的に充電する
事ができる。
(5) When the battery is placed in the mobile station and the base station or the charger and is in the charging state, the charging information is input to the microcomputer, so that the minimum necessary circuit is left and the power of other circuits is turned off. Since the difference between the circuit currents when the power switch of the mobile station is turned on and off is reduced, the change in the current flowing through the battery is small and the battery can be charged efficiently.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明のコードレス電話装置における一実施例
の概略ブロック図、第2図、第3図は従来のコードレス
電話装置の概略ブロック図である。 1……移動局、2……基地局、5……通話回路、6……
無線受信回路、8……空中線、12……電池、13……スイ
ッチ、14……無線送信回路、16……復調回路、17,18…
…マイクロコンピュータ、19……充電状態検出回路、20
……通話回路、21……無線受信回路、22……送話器、23
……受話器、24……表示器、25……充電器
FIG. 1 is a schematic block diagram of an embodiment of a cordless telephone device of the present invention, and FIGS. 2 and 3 are schematic block diagrams of a conventional cordless telephone device. 1 ... Mobile station, 2 ... Base station, 5 ... Call circuit, 6 ...
Radio receiver circuit, 8 ... Antenna, 12 ... Battery, 13 ... Switch, 14 ... Radio transmitter circuit, 16 ... Demodulator circuit, 17, 18 ...
… Microcomputer, 19 …… Charge state detection circuit, 20
...... Calling circuit, 21 ... Wireless receiving circuit, 22 ... Speaker, 23
…… Handset, 24 …… Display, 25 …… Charger

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大森 正 神奈川県横浜市港北区綱島東4丁目3番1 号 松下通信工業株式会社内 (72)発明者 岸間 康治 神奈川県横浜市港北区綱島東4丁目3番1 号 松下通信工業株式会社内 (72)発明者 稲本 敏晴 神奈川県横浜市港北区綱島東4丁目3番1 号 松下通信工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tadashi Omori Masaru Omori 4-3-1 Tsunashima-higashi, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industrial Co., Ltd. 4-3-1, Matsushita Communication Industrial Co., Ltd. (72) Inventor Toshiharu Inamoto 4-3-1, Tsunashima East, Kohoku Ward, Yokohama City, Kanagawa Matsushita Communication Industrial Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】電話回線に接続された基地局と、前記基地
局と無線で接続された移動局と、前記移動局の電源とし
て使用する充電式の電池を充電する為の充電器から成
り、前記基地局および前記充電器のどちらでも移動局の
内蔵電池を充電できる様に構成すると共に、前記移動局
と基地局および充電器の間で、充電電流を流す為の接点
を有し、前記移動局を前記基地局または充電器に乗せた
時にこの接点を通して流れる充電電流、または接点間に
かかる充電電圧を検出し、前記移動局が通話中である時
は、終話操作により発生する終話データと同様のデータ
を前記基地局に対し送出し、局通話またはインターホン
通話を自動的に終話させる様に構成したコードレス電話
装置。
1. A base station connected to a telephone line, a mobile station wirelessly connected to the base station, and a charger for charging a rechargeable battery used as a power source of the mobile station, Both the base station and the charger are configured so that the built-in battery of the mobile station can be charged, and the mobile station has a contact for flowing a charging current between the base station and the charger. When the mobile station is placed on the base station or the charger, the charging current flowing through this contact or the charging voltage applied between the contacts is detected, and when the mobile station is in a call, the end call data generated by the end call operation. A cordless telephone device configured to send the same data as the above to the base station and automatically terminate a station call or an intercom call.
【請求項2】移動局が充電状態にあるときに、前記充電
状態の検出により、受信待受回路の必要最小限の回路を
除き、他の回路の回路電源を切断する事により無効な電
力の消費を防ぎ、内蔵された充電式電池の充電を効率良
く行なう様に構成した特許請求の範囲第1項記載のコー
ドレス電話装置。
2. When the mobile station is in the charging state, the detection of the charging state removes the minimum required circuit of the reception standby circuit, and cuts off the circuit power supply of other circuits, thereby eliminating the invalid power. The cordless telephone device according to claim 1, wherein the cordless telephone device is configured to prevent consumption and efficiently charge a built-in rechargeable battery.
【請求項3】移動局の機能が、基地局で充電した場合
と、充電器にて充電した場合のどちらでも同様に動作す
る様にした特許請求の範囲第1項または第2項記載のコ
ードレス電話装置。
3. The cordless system according to claim 1 or 2, wherein the function of the mobile station is the same whether the mobile station is charged by the base station or the charger. Telephone device.
JP62309888A 1987-12-08 1987-12-08 Cordless telephone device Expired - Lifetime JPH0750905B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62309888A JPH0750905B2 (en) 1987-12-08 1987-12-08 Cordless telephone device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62309888A JPH0750905B2 (en) 1987-12-08 1987-12-08 Cordless telephone device

Publications (2)

Publication Number Publication Date
JPH01151345A JPH01151345A (en) 1989-06-14
JPH0750905B2 true JPH0750905B2 (en) 1995-05-31

Family

ID=17998524

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62309888A Expired - Lifetime JPH0750905B2 (en) 1987-12-08 1987-12-08 Cordless telephone device

Country Status (1)

Country Link
JP (1) JPH0750905B2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60248033A (en) * 1984-05-24 1985-12-07 Sony Corp Cordless telephone set
JPS61108245A (en) * 1984-10-31 1986-05-26 Aisin Seiki Co Ltd Telephone set
JPS61111047A (en) * 1984-11-05 1986-05-29 Matsushita Electric Ind Co Ltd Cordless telephone set
JPS6281133A (en) * 1985-10-03 1987-04-14 Nippon Telegr & Teleph Corp <Ntt> Inhibiting system for continuous transmission of radiotelephony equipment
JPS62115930A (en) * 1985-11-14 1987-05-27 Matsushita Electric Ind Co Ltd On-fook method for radio telephone equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60248033A (en) * 1984-05-24 1985-12-07 Sony Corp Cordless telephone set
JPS61108245A (en) * 1984-10-31 1986-05-26 Aisin Seiki Co Ltd Telephone set
JPS61111047A (en) * 1984-11-05 1986-05-29 Matsushita Electric Ind Co Ltd Cordless telephone set
JPS6281133A (en) * 1985-10-03 1987-04-14 Nippon Telegr & Teleph Corp <Ntt> Inhibiting system for continuous transmission of radiotelephony equipment
JPS62115930A (en) * 1985-11-14 1987-05-27 Matsushita Electric Ind Co Ltd On-fook method for radio telephone equipment

Also Published As

Publication number Publication date
JPH01151345A (en) 1989-06-14

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