JPH03214852A - Additional dial telephone service equipment - Google Patents

Additional dial telephone service equipment

Info

Publication number
JPH03214852A
JPH03214852A JP822790A JP822790A JPH03214852A JP H03214852 A JPH03214852 A JP H03214852A JP 822790 A JP822790 A JP 822790A JP 822790 A JP822790 A JP 822790A JP H03214852 A JPH03214852 A JP H03214852A
Authority
JP
Japan
Prior art keywords
equipment
caller
guidance
talkie
information
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
Application number
JP822790A
Other languages
Japanese (ja)
Inventor
Hiromichi Horikawa
堀川 博道
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP822790A priority Critical patent/JPH03214852A/en
Publication of JPH03214852A publication Critical patent/JPH03214852A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To receive additional service without redialing a telephone number by providing a guidance information originating equipment which offers a menu of plural information originating equipments and an additional dial processing part which switches information originating equipments while holding a line. CONSTITUTION:When a caller originates a call, the call is connected to a guidance talkie equipment of the guidance information originating equipment which offers and indicates a menu, operation button information, etc., of talkie equipments 4 to 9 of plural information originating equipments of an additional dial telephone service equipment. The caller connects the call to desired one of equipments 4 to 9 by the indicated button operation based on this guidance; and when a button based on the guidance is operated after the end of service, the line is kept held by an additional dial processing part 20, and the connected equipment is switched to one of equipments 4 to 9 corresponding to the indicating button operated by the caller. Consequently, the additional service is easily received without redialing the telephone number.

Description

【発明の詳細な説明】 〔産業上の利用分野) この発明は、テレホンサービスにおいて、発信者の追加
ダイヤルによる指示で情報を選択できる追加テレホンサ
ービス装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an additional telephone service device that allows a caller to select information based on an instruction using an additional dial in a telephone service.

〔従来の技術) 第4図に基づいて、従来の電気通信設備のテレホンサー
ビス装置の一例を説明する。交換機2にはトーキー設備
4〜9が併設されている(このトーキー設備の個数は第
1図のように限定されたものでなく、不特定の数の設置
が可能である)。いま、発信者1がトーキー設備4のテ
レホンサービスA情報を聞くときは、まず、発信者1が
トーキー設備4のテレホンサービスの電話番号をダイヤ
ルする。交換機2はこの電話番号を受信し、トランク3
を介して発信者1をA情報のトーキー設備4に接続し、
テレホンサービスを提供する(なお、発信者1はプッシ
ュ式電話機・ダイヤル式電話機のいずれを用いても差し
支えない)。もし更に、発信者1が他のトーキー設備5
のテレホンサービスB情報を聞こうとするならば、一旦
受話器をかけ、トーキー設備5の接続のため新たな電話
番号をダイヤルしなければならない。更に、発信者1が
トーキー設備9のテレホンサービスF情報を聞く場合も
同様である。
[Prior Art] An example of a conventional telephone service device for telecommunications equipment will be described with reference to FIG. The exchange 2 is provided with talkie equipment 4 to 9 (the number of talkie equipment is not limited as shown in FIG. 1, and an unspecified number can be installed). Now, when the caller 1 wants to hear the telephone service A information of the talkie equipment 4, the caller 1 first dials the telephone number of the telephone service of the talkie equipment 4. Switch 2 receives this phone number and transfers it to trunk 3.
connect the caller 1 to the talkie equipment 4 of the A information via the
Telephone service is provided (note that the caller 1 may use either a push-button telephone or a dial telephone). If, in addition, caller 1 is connected to another talkie facility 5
If the user wants to hear the telephone service B information, he or she must hang up the telephone and dial a new telephone number to connect the talkie equipment 5. Furthermore, the same applies when the caller 1 listens to the telephone service F information of the talkie equipment 9.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

このように、従来はそのテレホンサービス対応の電話番
号をその都度ダイヤルしなければならないし、交換機2
はその都度接続動作を行い、トランク3を介してトーキ
ー設備4〜9の一つに接続し、テレホンサービスを}是
イ共しなければならない。それ故に、サービスの種類が
多くなると発信者1は操作が大変なばかりでなく、電話
番号を覚えるのが困難であった。
In this way, conventionally, it was necessary to dial the telephone number corresponding to the telephone service each time, and the exchange
must each time perform a connection operation, connect via trunk 3 to one of the talkie facilities 4 to 9, and share the telephone service. Therefore, when there are many types of services, it is not only difficult for the caller 1 to operate the service, but it is also difficult for the caller 1 to remember the telephone number.

この発明は、このような欠点を解決するためになされた
ものであり、発信者に対しガイダンスの指示によって追
加ダイヤルさせ、追加ダイヤルテレホンサービス装置で
他のトーキー設備へ接続替えすることにより、新たな情
報を聞かせるようにする追加ダイヤルテレホンサービス
装置を提供することを目的とする。
This invention was made to solve these shortcomings, and allows the caller to make additional dials according to guidance instructions, and by switching the connection to other talkie equipment using the additional dial telephone service device, new information can be obtained. The purpose of the present invention is to provide an additional dial telephone service device that allows users to listen to telephone calls.

〔課題を解決するための手段〕[Means to solve the problem]

この発明にかかる追加ダイヤルテレホンサービス装置は
、複数の情報発信設備の情報メニューを発信者に提供す
るガイダンス用情報発信設備と、発信者からの追加ダイ
ヤルを受けて回線を保持したまま追加ダイヤルに対応す
る情報発信設備への切替えを行う追加ダイヤル処理部と
を具備させたものである。
The additional dial telephone service device according to the present invention includes a guidance information transmission equipment that provides a caller with information menus of a plurality of information transmission equipment, and a system that receives additional dials from the caller and responds to the additional dials while maintaining the line. This system is equipped with an additional dial processing unit that performs switching to information transmission equipment.

(作用) この発明においては、あらかじめ定めた電話番号にダイ
ヤルし、音声ガイダンスに従っていくつかの情報メニュ
ーの中から自分の聞きたい情報番号をダイヤルすると、
あらかじめ録音されたテープの中から指定したメッセー
ジを聞くことができ、また、何度でも情報メニューをか
えてメッセージを聞くことのできる。
(Operation) In this invention, when you dial a predetermined telephone number and follow voice guidance to dial the information number you want to hear from among several information menus,
You can listen to a specified message from a pre-recorded tape, and you can change the information menu as many times as you like to listen to the message.

〔実施例〕〔Example〕

第1図はこの発明の一実施例を示すブロック図で、10
はガイダンス用トーキー設備、20は追加ダイヤル処理
部であり、1〜9は第4図と同じである。
FIG. 1 is a block diagram showing one embodiment of the present invention.
2 is a guidance talkie facility, 20 is an additional dial processing section, and 1 to 9 are the same as in FIG. 4.

次に動作について説明する。Next, the operation will be explained.

発信者1のプッシュ式電話機(多周波信号発生器を有す
る)によって発呼されると、交換機2はトランク3を介
し、新たに設けた追加ダイヤル処理部20を経由してガ
イダンス用トーキー設備10に接続する。ここでは、あ
らかじめ録音されたガイダンス用メッセージを送出する
ことによフて、発信者1に対して追加ダイヤルの指示を
行う。メッセージの一例としては、「“l“から“6″
までのプッシュボタンの中、一つを押して下さい。プッ
シュボタン“1”はA情報、“2“はB情報、・・・・
・・“6″はF情報のテレホンサービスです。他の情報
を聞きたい場合は、#の後にその番号のプッシュボタン
を押して下さい。」とする。発信者1は#の後から任意
の”1”から“6”までのプッシュボタンの一つを押す
と、電話機から発{aされた信号は交換機2とトランク
3を経由し、追加ダイヤル処理部20で直接受信される
。追加ダイヤル処理部20は発信者1の聞こうとするテ
レホンサービス情報のメニュー用のトーキー設備4〜9
に接続するために対応のリレーを動作させ、所定のタイ
ミングをとってトーキー設備4〜9の一つへ接続替えを
行う。
When a call is made by the caller 1's push-button telephone (equipped with a multi-frequency signal generator), the exchange 2 transmits the call to the guidance talkie equipment 10 via the trunk 3 and a newly installed additional dial processing section 20. Connecting. Here, the caller 1 is instructed to make additional dials by sending a prerecorded guidance message. An example of a message is ““l” to “6”.
Please press one of the push buttons up to. Push button “1” is A information, “2” is B information, etc.
..."6" is the F information telephone service. If you would like to hear other information, please press the push button for that number after #. ”. When caller 1 presses one of the push buttons numbered ``1'' to ``6'' after #, the signal emitted from the telephone passes through exchange 2 and trunk 3 and is sent to the additional dial processing unit. Directly received at 20. The additional dial processing unit 20 provides talkie equipment 4 to 9 for a menu of telephone service information that the caller 1 wants to hear.
In order to connect to the talkie equipment, the corresponding relay is operated, and the connection is changed to one of the talkie equipment 4 to 9 at a predetermined timing.

発信者7が更に他のメニューを聞きたい場合は、#のブ
ユシュボタンの後に任意の“1”〜″6nまでのプユシ
ュボタンを押すことによって、追加ダイヤル処理部20
内でトーキー設備4〜9に対する回線が接続替えされる
ので、要求するメッセージを聞くことができる。何度で
も#の後にプッシュボタンを押すと、新しいテレホンサ
ービス情報を聞くことができる。
If the caller 7 wants to listen to another menu, press any push button from "1" to "6n" after the # push button to hear the additional dial processing unit 20.
Since the lines for talkie equipment 4 to 9 are reconnected within the terminal, the requested message can be heard. You can press the push button after # as many times as you like to hear new telephone service information.

ただし、ブユシュ式電話機(多周波信号発生器を有する
)以外の発信者1からのダイヤルは、ガイダンス用トー
キー設備10への接続のみである。1個の追加ダイヤル
処理部20へ併置するトーキー設備の最大収容はこの実
施例では6個である。
However, dialing from a caller 1 other than a buyush type telephone (having a multi-frequency signal generator) is only for connection to the guidance talkie equipment 10. In this embodiment, the maximum number of talkies installed in one additional dial processing section 20 is six.

このように、追加ダイヤルテレホンサービス装置を作る
ことによって、発信者1が一つの電話番号をダイヤルす
ることで、この実施例では最大6種のテレホンサービス
情報を聞くことができる。
By creating the additional dial telephone service device in this way, the caller 1 can hear up to six types of telephone service information in this embodiment by dialing one telephone number.

第2図に基づいてこの発明に関する追加ダイヤル処理部
20の基本構成を説明する。21はPB信号受信部で、
22はデコーダ部、23はりlノ一制御部で、メニュー
用のトーキー設備4〜9を局線30へ接続するためのも
のである。24は前記メニュー用のトーキー設備4〜9
を作動させる選択起動部、10はガイダンス用トーキー
設備である。25はガイダンスに戻すためのガイダンス
復帰回路部、26は終話を検知して回線切断を行うため
の局線監視部、27は各部を作動させる電源部である。
The basic configuration of the additional dial processing section 20 according to the present invention will be explained based on FIG. 2. 21 is a PB signal receiving section;
22 is a decoder section, and 23 is a control section for connecting the menu talkie facilities 4 to 9 to the central office line 30. 24 is the talkie equipment 4 to 9 for the menu.
10 is a guidance talkie device. Reference numeral 25 indicates a guidance return circuit section for returning to guidance, 26 indicates a station line monitoring section for detecting the end of a call and disconnecting the line, and 27 indicates a power supply section for operating each section.

次に動作について説明する。Next, the operation will be explained.

発信者1が発呼すると、ガイダンス用トーキー設備10
へ接続される。発信者1はそのガイダンスの指示に従っ
て“#”と“1〜6”の中、任意の数字“1”をダイヤ
ルすると、PB信号受信部21はPB信号を受信し、デ
コーダ部22で翻訳をしてリレー制御部23に送達する
。ここでは、トーキー設備4〜9の中からPB信号対応
の接点を閉じ、発信者1の要求するテレホンサービスの
トーキー設備4〜9の中の一つを起動させ、タイミング
をとり局線30に接続する。
When the caller 1 makes a call, the guidance talkie equipment 10
connected to. When the caller 1 dials "#" and any number "1" from "1 to 6" according to the instructions of the guidance, the PB signal receiving section 21 receives the PB signal, and the decoder section 22 translates it. and sends it to the relay control unit 23. Here, the contacts corresponding to the PB signal among the talkie equipment 4 to 9 are closed, one of the talkie equipment 4 to 9 for the telephone service requested by the caller 1 is activated, and the timing is determined to connect it to the central office line 30. .

なお、ガイダンス復帰回路部25によりトーキー設備4
〜9の接続をガイダンス用トーキー設備10へ戻す。ま
た、局線監視部26で終話を検知し、追加ダイヤル処理
部20の復旧を図る。
Note that the guidance return circuit 25 allows the talkie equipment 4 to
-9 connections back to the guidance talkie equipment 10. Further, the station line monitoring section 26 detects the end of the call, and attempts to restore the additional dial processing section 20.

第3図は、第2図の追加ダイヤル処理部2oのより具体
的な回路例を示すものであり、第2図と対応する部分に
は同一の符号を付してある。また、大文字で示すA,B
,・・・F,AA.BA,・・・FA,RLSはリレー
であり、それらの接点を小文字で表す。
FIG. 3 shows a more specific circuit example of the additional dial processing section 2o in FIG. 2, and parts corresponding to those in FIG. 2 are given the same reference numerals. Also, A and B shown in capital letters
,...F,AA. BA, . . . FA, RLS are relays, and their contacts are represented by lowercase letters.

いま、ある電話機からテレホンサービス情報を得ようと
発呼したとする。交換機2はトランク3を介し、追加ダ
イヤル処理部20の通話路を経由しガイダンス用トーキ
ー設備10へ接続する。ガイダンス用トーキー設備10
からは、第2図で説明したように、着信呼に対して追加
ダイヤルの指示案内を行う。発呼者はガイダンス用トー
キー設備10のガイダンスに従っていくつかの情報メニ
ューから自分の間きたい情報をダイヤルする。追加ダイ
ヤル処理部20のA,B・・・・・・Fリレーは、発信
者1の追加ダイヤル数字と対応するリレーで、また、A
A,BA・・・FAリレーにも対応し、トーキー設備4
〜9にも対応するリレーである。
Suppose that you make a call to obtain telephone service information from a certain telephone. The exchange 2 is connected to the guidance talkie equipment 10 via the trunk 3 and the communication path of the additional dial processing section 20. Guidance talkie equipment 10
From there, as explained in FIG. 2, additional dialing instructions are given to the incoming call. The caller dials the information he/she desires from several information menus according to the guidance of the guidance talkie equipment 10. The A, B...F relays of the additional dial processing section 20 are relays corresponding to the additional dial numbers of the caller 1, and
A, BA... Also compatible with FA relay, talkie equipment 4
This is a relay that also corresponds to ~9.

例えば発信者1が数字″1”をダイヤルしたとする。P
B信号受信部21はデコーダ部22を介して(デコーダ
部22では“1”をAリレー動作となるように翻訳設定
)、要求するトーキー設備4に対応するAリレーを動作
させる。接点a2,a3はトーキー設備4を起動させる
回路を作成し、これを始動させる。接点a1はAAリレ
ーを動作させ、接点aaO,aalはトーキー設備4を
通話路に接続替えをするが、同時にZリレーを動作させ
接点ZOでループ(通話路の瞬断防止)をつくるので、
追加ダイヤル処理部20の通話路は局線30側にのびな
い。Aリレーが自己接点aOで遅延復旧した後、続いて
Zリレーも復旧しループを解除することにより局線30
への接続が完了し、発信者1はトーキー設備4の情報を
聞くことができる。
For example, suppose caller 1 dials the number "1". P
The B signal receiving section 21 operates the A relay corresponding to the requested talkie equipment 4 via the decoder section 22 (the decoder section 22 translates and sets "1" so that the A relay operates). Contacts a2 and a3 create a circuit for starting the talkie equipment 4 and start it. The contact a1 operates the AA relay, and the contacts aaO and aal change the connection of the talkie equipment 4 to the communication line, but at the same time, they operate the Z relay and create a loop (preventing instantaneous interruption of the communication line) at the contact ZO.
The communication path of the additional dial processing section 20 does not extend to the central office line 30 side. After the A relay recovers with a delay due to its self-contact aO, the Z relay also recovers and the loop is released, so that the station line 30
The connection to the caller 1 is completed, and the caller 1 can listen to the information of the talkie facility 4.

発信者1が他の情報を聞く場合、再びガイダンスに戻る
ため#のダイヤルをする。PB信号受信部21はデコー
ダ部22へ送達、ガイダンス復帰回路部25のRSLリ
レーが動作し、接点rls2,rls3でガイダンス用
トーキー設備10を起動させる。RLSリレーの動作は
接点rlslでAAリレーを復旧させ、接点aaO,a
al復帰でA情報のトーキー設備4の運転をとめる。
If caller 1 wants to hear other information, he dials # to return to the guidance. The PB signal receiving section 21 sends the signal to the decoder section 22, the RSL relay of the guidance return circuit section 25 operates, and the guidance talkie equipment 10 is activated through contacts rls2 and rls3. The operation of the RLS relay is to restore the AA relay with the contact rlsl, and the contacts aaO, a
When al returns, the operation of the talkie equipment 4 of A information is stopped.

RLSリレーは動作後すぐ自己遅延復旧するので、これ
によってガイダンス用トーキー設備10のメッセージが
発信者1側に流れる。
Since the RLS relay automatically recovers with a delay immediately after activation, the message from the guidance talkie equipment 10 is transmitted to the caller 1 side.

さらに、発信者1が他のトーキー設備5へ接続のため″
2″′をダイヤルしたとする。追加ダイヤル処理部2o
ではPB侶号受信部21がデコーダ部22を介し(デコ
ーダ部22では“2”をBリレー動作となるように翻訳
設定)、要求するトーキー設備5に対応するBリレーの
起動回路をつくり、これを始動させる。以後、前記トー
キー設備4の情報を聞く場合と同様に、リレー制御部2
3のBAリレー Zリレーの動作・復旧でトーキー設備
5の情報を局線30へ接続する。
Furthermore, since the caller 1 connects to another talkie equipment 5,
2″′ is dialed.Additional dial processing unit 2o
Then, the PB signal receiving section 21 creates a starting circuit for the B relay corresponding to the requested talkie equipment 5 via the decoder section 22 (the decoder section 22 translates and sets "2" so that it operates as the B relay). start. Thereafter, in the same way as when listening to the information of the talkie equipment 4, the relay control unit 2
The information of the talkie equipment 5 is connected to the central office line 30 by the operation/restoration of the BA relay Z relay of 3.

更に、発信者1が#と任意の〜数字をダイヤルするたび
に、同様の動作が繰り返される。
Further, the same operation is repeated every time the caller 1 dials # and any digits.

終了後、発信者1が受話器をかけると、トーキー設備が
終話を検討し回線から切断する。この時、回線の電圧が
48Vに戻るので、これを検知し(Kリレーの動作)、
追加ダイヤルテレホンサービス装置も復旧する。
When the caller 1 hangs up after the call ends, the talkie equipment considers ending the call and disconnects from the line. At this time, the line voltage returns to 48V, so this is detected (K relay operates),
Additional dial telephone service equipment will also be restored.

なお、上記の実施例ではトーキー設備4〜9,ガイダン
ス用トーキー設備10を用いたが、具体的には、メッセ
ージをテープや音声メモリICで録音,再生するもので
ある。一般的には情報発信設備ということができる。
In the above embodiment, the talkie equipment 4 to 9 and the guidance talkie equipment 10 are used, but more specifically, messages are recorded and played back using tape or a voice memory IC. Generally speaking, it can be called an information dissemination facility.

(発明の効果) 以上説明したように、この発明は複数の情報発信設備の
情報メニューを発信者に提供するガイダンス用情報発信
設備と、発信者からの追加ダイヤルを受けて回線を保持
したまま追加ダイヤルに対応する情報発信設備への切替
えを行う追加ダイヤル処理部とを具備させたので、新た
なテレホンサービスを聞き直す場合、毎回最初から電話
番号をかけ直すことなく簡単なダイヤル操作で能率的に
情報が得られる利点がある。
(Effects of the Invention) As explained above, the present invention provides guidance information transmission equipment that provides a caller with information menus from a plurality of information transmission equipment, and a guidance information transmission equipment that provides a caller with information menus from a plurality of information transmission equipment; Equipped with an additional dial processing unit that switches to the information transmission equipment corresponding to the dial, when re-listening to a new telephone service, you can efficiently receive information with a simple dial operation without having to dial the number from the beginning each time. There are advantages that can be obtained.

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

第1図はこの発明の一実施例の構成を示すブロック図、
第2図は、第1図中の追加ダイヤルテレホンサービス装
置の基本構成図、第3図は追加ダイヤルテレホンサービ
ス装置の回路例を示す図、第4図は従来のテレホンサー
ビス装置構成を示すブロック図である。 図中、1は発信者、2は交換機、3はトランク、4〜9
はトーキー設備、10はガイダンス用トーキー設備、2
0は追加ダイヤルIA埋部、21はPB信号受信部、2
2はデコーダ部、23はリレー制御部、24は選択起動
部、25はガイダンス復帰回路部、26は局線監視部、
27は電源部である。 第 4 図
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
FIG. 2 is a basic configuration diagram of the additional dial telephone service device shown in FIG. 1, FIG. 3 is a diagram showing a circuit example of the additional dial telephone service device, and FIG. 4 is a block diagram showing the configuration of a conventional telephone service device. In the figure, 1 is the caller, 2 is the exchange, 3 is the trunk, 4 to 9
is talkie equipment, 10 is talkie equipment for guidance, 2
0 is the additional dial IA filling section, 21 is the PB signal receiving section, 2
2 is a decoder section, 23 is a relay control section, 24 is a selection activation section, 25 is a guidance return circuit section, 26 is a station line monitoring section,
27 is a power supply section. Figure 4

Claims (1)

【特許請求の範囲】[Claims] 電気通信設備を利用し、複数の情報発信設備からそれぞ
れ情報を発信者に提供するテレホンサービス装置におい
て、前記複数の情報発信設備の情報メニューを発信者に
提供するガイダンス用情報発信設備と、前記発信者から
の追加ダイヤルを受けて回線を保持したまま前記追加ダ
イヤルに対応する情報発信設備への切替えを行う追加ダ
イヤル処理部とを具備させたことを特徴とする追加ダイ
ヤルテレホンサービス装置。
In a telephone service device that utilizes telecommunications equipment and provides information to a caller from a plurality of information transmission equipment, the information transmission equipment for guidance provides information menus of the plurality of information transmission equipment to the caller, and the caller 1. An additional dial telephone service device, comprising: an additional dial processing section that receives an additional dial from a source and switches to an information transmitting facility corresponding to the additional dial while maintaining the line.
JP822790A 1990-01-19 1990-01-19 Additional dial telephone service equipment Pending JPH03214852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP822790A JPH03214852A (en) 1990-01-19 1990-01-19 Additional dial telephone service equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP822790A JPH03214852A (en) 1990-01-19 1990-01-19 Additional dial telephone service equipment

Publications (1)

Publication Number Publication Date
JPH03214852A true JPH03214852A (en) 1991-09-20

Family

ID=11687279

Family Applications (1)

Application Number Title Priority Date Filing Date
JP822790A Pending JPH03214852A (en) 1990-01-19 1990-01-19 Additional dial telephone service equipment

Country Status (1)

Country Link
JP (1) JPH03214852A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5462712A (en) * 1977-10-28 1979-05-21 Hitachi Ltd Audio response unit
JPS62236248A (en) * 1986-04-07 1987-10-16 Japan Radio Co Ltd Automatic audio response system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5462712A (en) * 1977-10-28 1979-05-21 Hitachi Ltd Audio response unit
JPS62236248A (en) * 1986-04-07 1987-10-16 Japan Radio Co Ltd Automatic audio response system

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