JPH04120859A - Card type public telephone system - Google Patents

Card type public telephone system

Info

Publication number
JPH04120859A
JPH04120859A JP24070190A JP24070190A JPH04120859A JP H04120859 A JPH04120859 A JP H04120859A JP 24070190 A JP24070190 A JP 24070190A JP 24070190 A JP24070190 A JP 24070190A JP H04120859 A JPH04120859 A JP H04120859A
Authority
JP
Japan
Prior art keywords
card
telephone
call
public telephone
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
JP24070190A
Other languages
Japanese (ja)
Inventor
Noboru Harada
昇 原田
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP24070190A priority Critical patent/JPH04120859A/en
Publication of JPH04120859A publication Critical patent/JPH04120859A/en
Pending legal-status Critical Current

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  • Prepayment Telephone Systems (AREA)

Abstract

PURPOSE:To enable a call many times by one telephone card by designating a charging destination when there is no call frequency in the telephone card. CONSTITUTION:When requesting connection designating the charging destination from a public telephone set 5, a telephone card 1 is inserted to the public telephone set 5, and the number of a callee is dialed. At such a time, however, '*'is finally dialed. At an exchange 11, the three kinds of information such as a charging destination telephone number 2, personal code number 3 and use possibility symbol 4 in the telephone card 1 are analyzed together with the line number of a caller and when the analyzed result shows that charging can not be executed to the designated charging destination, a busy tone(BT) is transmitted to the caller. When the charging is enabled, however, the callee is connected similarly to the normal exchange operation. Thus, even when there is no rate remaining in a card in the middle of the call, the call can be continued.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はカード式公衆電話方式に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a card-type public telephone system.

〔従来の技術〕[Conventional technology]

従来のカード式公衆電話方式は、プリペイドカードの残
余度数内で通話できる構成となっていた。
Conventional card-operated public telephone systems were configured so that calls could be made within the remaining power of the prepaid card.

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

上述した従来のカード式公衆電話方式は、プリペイドカ
ードの残余度数内でのみ通話できるようになっているの
で、通話途中で度数がなくなると通話が継続できないと
いう欠点がある。
The above-mentioned conventional card-type public telephone system is designed so that a call can only be made within the remaining power of the prepaid card, so there is a drawback that if the power runs out during a call, the call cannot be continued.

また、残余度数のないプリペイドカートは1回限りの使
用で廃棄されるので、資源の有効利用が図れず、また、
通話を継続したい場合には別のプリペイドカードかまた
は現金(硬貨)を持っていないと通話できないという欠
点がある。
In addition, prepaid carts with no remaining points are used only once and then discarded, making it difficult to use resources effectively.
The drawback is that if you want to continue the call, you must have another prepaid card or cash (coins).

1課題を解決するための手段〕 本発明のカード式公衆電話方式は、少なくとも課金先電
話番号と、予め定められた暗証番号と、使用可否信号と
を含むカード情報を記憶するプリペイドカードと、この
プリペイドカードを使用して発呼できる公衆電話機と、
この公衆電話機を電話回線を介して接続する交換機とを
備えて成り、前記公衆電話機は発呼時に前記交換機から
指示を受信して前記プリペイドカード内のカード情報を
読出す読出手段および前記プリペイドカードに使用書n
J否信号を書込む書込手段と、前記読出手段で読出した
前記カード情報を前記交換機へ送出する送出手段とを有
し、前記交換機は着呼時に発呼した前記公衆電話機へ前
記カード情報の送出を要求する情報要求手段と、送られ
た前記カード情報を受信1〜で分析する情報分析手段と
、この情報分析手段の分析結果により前記公衆電話機に
対する通話接続を制御する接続制御手段と、通話終了時
にカード情報に基づいて指定された加入者の記憶エリア
に通話課金度数を積算して記憶する記憶手段とを有して
いる。
1. Means for Solving the Problems] The card-type public telephone system of the present invention includes a prepaid card that stores card information including at least a billing telephone number, a predetermined password, and a usage permission signal; A public phone that allows you to make calls using a prepaid card,
an exchange that connects the public telephone via a telephone line, and the public telephone receives an instruction from the exchange when making a call and reads out card information in the prepaid card; Instruction manual n
It has a writing means for writing a J-reject signal, and a sending means for sending the card information read by the reading means to the exchange, and the exchange sends the card information to the public telephone that made the call when the call is received. an information requesting means for requesting transmission; an information analyzing means for analyzing the sent card information at reception 1; a connection control means for controlling a telephone call connection to the public telephone based on the analysis result of the information analyzing means; and storage means for accumulating and storing the call charge frequency in the storage area of the subscriber designated based on the card information at the time of termination.

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第1図は本発明の一実施例を示すブロック図、第2図は
第1図内の記憶装置の記憶構成の一例を示す図である。
FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the storage configuration of the storage device in FIG. 1.

第1図において、本実施例はプリペイドカードの一種で
あるテレホンカード1と、テレホンカード1を使用して
発呼できる公衆電話機5と、公衆電話機5に電話回線1
oを介して接続する交換機11とを備えて構成している
In FIG. 1, this embodiment includes a telephone card 1 which is a type of prepaid card, a public telephone 5 that can make calls using the telephone card 1, and a telephone line 1 to the public telephone 5.
and an exchange 11 connected via o.

テレホンカード1は通話度数がなくなった場合の課金先
電話番号2と、予め定められた暗証番号3と、テレホン
カード1の使用可否を示す使用可否記号4とを記憶1−
でいる。
The telephone card 1 stores a billing telephone number 2 when the number of calls is exhausted, a predetermined password 3, and a usability symbol 4 indicating whether or not the telephone card 1 can be used.
I'm here.

公衆電話機5は電話番号およびテレポンカード1内の記
憶情報をPB倍信号変換して電話回線10へ送出するP
B信号送田部(以下BPSと記す)6と、交換機11か
らのテレポンカード1に関する制御情報を受信するカー
ド制御情報受信部(以TC8Rと記す)7と、テレホン
カーFl内の記憶情報の読出しおよび使用可否信号4の
書込みを行うカード情報制御部(以下CDCと記す)8
と、公衆電話機5全体を制御する制御装置(以下CPU
と記す)9とを有して構成している。
The public telephone 5 converts the telephone number and information stored in the telephone card 1 into a PB signal and sends it to the telephone line 10.
A B signal transmitter (hereinafter referred to as BPS) 6, a card control information receiving unit (hereinafter referred to as TC8R) 7 that receives control information regarding the telephone card 1 from the exchange 11, and reading of information stored in the telephone car Fl. and a card information control unit (hereinafter referred to as CDC) 8 that writes the usability signal 4.
and a control device (hereinafter referred to as CPU) that controls the entire public telephone 5.
9).

交換機11は電話回線10にインタフェースする加入者
回路部(以下S L Cと記す)12と、5LC12を
介して公衆電話機5の状態を監視する加入者線走査装置
部(以下、LSCNと記す)13と、通話路のスイッチ
(以下SWと記す)]4と、ダイヤルトーン(DT)、
ビジトーン(B T)等を送出するη■聴音送信部(以
下TNSと記す)15と、公衆電話機5からのPB倍信
号受信するPB信号受信部(以下PBRと記す)16と
、公衆電話機5へ使用されているテレホンカードに関す
る制御情報を送出するカード制御情報送信部(以下、C
55と記す)17と、5W14を制御するスイッチ制御
部(以下SWCと記す)18と、課金度数を記憶する課
金メータ部(以下METと記す)19と、複数のテレホ
ンカード対応の情報を記憶する記憶装置(以下MEMと
記す)22と、PBR16で読取ったテレホンカードの
情報をMEM22を参照1〜で分析し課金の算出を行う
課金制御部(以下CI−I Cと記す)20と、交換機
1]内を制御する中央制御装置(以下CCと記す)21
とを有して構成している。
The exchange 11 includes a subscriber circuit unit (hereinafter referred to as SLC) 12 that interfaces with the telephone line 10, and a subscriber line scanning unit (hereinafter referred to as LSCN) 13 that monitors the status of the public telephone 5 via the 5LC12. , call path switch (hereinafter referred to as SW)] 4, dial tone (DT),
A hearing transmitter (hereinafter referred to as TNS) 15 that sends out a visit tone (BT), etc., a PB signal receiver (hereinafter referred to as PBR) 16 that receives a PB double signal from the public telephone 5, and a Card control information transmitter (hereinafter referred to as C) that transmits control information regarding the telephone card being used.
55) 17, a switch control unit (hereinafter referred to as SWC) 18 that controls the 5W14, a charging meter unit (hereinafter referred to as MET) 19 that stores the charging frequency, and stores information corresponding to a plurality of telephone cards. A storage device (hereinafter referred to as MEM) 22, a charging control unit (hereinafter referred to as CI-IC) 20 that analyzes telephone card information read by the PBR 16 with reference to MEM 22 and calculates charges, and an exchange 1. ] Central control unit (hereinafter referred to as CC) 21
It is composed of:

次に、本実施例の動作について第1図を用いて説明する
Next, the operation of this embodiment will be explained using FIG. 1.

公衆電話機5から課金先指定接続を要求する場合、テレ
ホンカード1を公衆電話機5に差し込み被呼者番号をダ
イヤルするが、このとき*゛を最後にダイヤルする。交
換機11では、LS CN13で発呼検出を行い、通常
の発呼接続と同様の処理にて、CC21,,5WCI 
8.SWI 4等の装置類が作動1.TNS15が公衆
電話機5に接続され、ダイヤルト−ンが発信者に送られ
る。発信者は上述の番号lダイヤルするが、この番号は
PBS6から送られ、電話回線lO経由で交換機11の
PBR16で受信される。受信されたダイヤル番号は、
CC21で分析されるが、パ*′″数字により課金先指
定接続であることが判明する。
When requesting a connection to specify a billing destination from the public telephone 5, the telephone card 1 is inserted into the public telephone 5 and the called party number is dialed. At this time, *'' is dialed at the end. In the exchange 11, the call is detected by the LS CN13, and the CC21, 5WCI is
8. Devices such as SWI 4 are activated 1. A TNS 15 is connected to the public telephone 5 and a dial tone is sent to the caller. The caller dials the above-mentioned number l, which is sent from the PBS 6 and received by the PBR 16 of the exchange 11 via the telephone line lO. The received dialed number is
It is analyzed by the CC 21, and it is determined that the connection is a billing destination specified connection based on the pa*''' number.

CC21は5WC18経由で5W14を制御し、C3S
 17を公衆電話機5に接続し、C3S 17からテレ
ホンカード1内の課金先電話番号2.暗証番号3.使用
可否記号4が公衆電話機5側に要求される。公衆電話機
5では、C8R7でこの要求が受信され、CPU9経由
で、CDC8が起動され、テレホンカード1から、これ
らの情報を読出し、ダイヤル数字の送出と同様にして交
換機11側に送る。
CC21 controls 5W14 via 5WC18, and C3S
17 to the public telephone 5, and from the C3S 17 call the billing telephone number 2. in the telephone card 1. PIN number 3. The availability symbol 4 is requested from the public telephone 5 side. In the public telephone set 5, this request is received by the C8R7, and the CDC8 is activated via the CPU9, reads out this information from the telephone card 1, and sends it to the exchange 11 side in the same manner as sending dialed digits.

交換機11では、以上の3つの情報は、発信者の回線番
号と共に、PBR16よりCC21経由でCHC20に
送られ分析される。分析結果が指定された課金先に課金
できない場合は、TNS15からBTが発信者に送出さ
れるが、課金可能になった場合は、通常の交換接続動作
と同様に被呼者への接続が行なわれ、以後、終話までの
動作も通常の交換接続動作と同様である。
In the exchange 11, the above three pieces of information, together with the caller's line number, are sent from the PBR 16 to the CHC 20 via the CC 21 and analyzed. If the analysis result indicates that charging cannot be made to the specified billing destination, a BT is sent to the caller from the TNS 15, but if billing becomes possible, connection to the called party is performed in the same way as normal exchange connection operation. After that, the operation until the end of the call is the same as the normal exchange connection operation.

終話時は通常の交換接続動作と同様に、CC21が終話
を検出すると、CHC20に課金情報と発本番号からM
ET19の内から該当メータを求め、課金情報より算出
した課金度数を該当メータに加4算する。
At the end of a call, when the CC 21 detects the end of the call, it sends the M
The corresponding meter is found from among the ET19, and the billing frequency calculated from the billing information is added to the corresponding meter by 4.

次に、第1図、第2図を参照して本実施例の指定先加入
者への課金の可否の分析動作について説明する。
Next, with reference to FIGS. 1 and 2, the analysis operation of this embodiment to determine whether or not to charge a designated subscriber will be described.

第2図は課金先加入者の記憶装置の記憶構成を示す図で
ある。
FIG. 2 is a diagram showing the storage structure of the storage device of the billing subscriber.

第2図に於いて、記憶装置(以下MEMと記す)22は
課金先電話番号に対応する加入者の記憶装置で暗証番号
(課金を許容する暗証番号:複数可能)23.規制状況
(暗証番号対応)24を記憶している。CI(C20の
分析ではまず使用可否記号4を分析する。使用可否記号
が使用不可の場合は即TNS 15からのBT接続とす
るが、使証番号3が登録されているかMEM22内の暗
証番号23と比較しながら判断する。登録されていない
場合は即BT接続とするが、登録されている場合は、さ
らにMEM22内の規制状況24を判、、、、9 断する。規制状況4か規制状態(テレホンカーFを紛失
した場合、交換機11の運用部門で利用者からの依頼を
受は予め規制状態を登録しておく)が規制状態の場合は
、紛失カードの拾得者からの発信接続のためC8S 1
7から公衆電話機5のC3R7にカードの書き替え指示
(使用可否記号を使用不可にする。)が送出される。こ
の指示は公衆電話機5内で、CPU9経由でCDC8に
送られ、このCDC8によってカード内容が使用不可に
書き替えられる。この結果はダイヤル番号と同様の方法
によって、PBS6から送出され、PBR16で受信さ
れ、CC21経由でCHC20に送られ、書き替え結果
が確認される。正常に書き替えが終了した場合は、ME
M22の規制状況24を規制対象外に書き替えるが(こ
の場合、該当暗証番号は別のカードで再利用可能となる
。)テレホンカード1の使用可否記号4の書き替えが異
常終了した場合は規制状況24の書き替えは行なわず次
回まわしとする。しかし、いづれの場合も、発信接続要
求はBT接続となる。
In FIG. 2, a storage device (hereinafter referred to as MEM) 22 is a storage device of a subscriber corresponding to a billing telephone number, and a password number (multiple passwords are allowed for billing) 23. The regulation status (corresponding to the PIN number) 24 is stored. In the analysis of CI (C20, we first analyze the usability symbol 4. If the usability symbol is not usable, we will immediately connect BT from TNS 15, but if the usage number 3 is registered or the PIN number 23 in MEM 22 If it is not registered, it will be connected to BT immediately, but if it is registered, it will further check the restriction status 24 in the MEM 22.Restriction status 4 or restriction status (If telephone car F is lost, the operation department of switchboard 11 receives a request from the user and registers the restriction state in advance.) If it is in the restriction state, the person who found the lost card will be able to make an outgoing connection. C8S 1
7 sends a card rewriting instruction (to make the usability symbol unusable) to C3R7 of the public telephone 5. This instruction is sent to the CDC 8 within the public telephone 5 via the CPU 9, and the contents of the card are rewritten to be unusable by the CDC 8. This result is sent from the PBS 6 in the same manner as the dial number, received by the PBR 16, and sent to the CHC 20 via the CC 21, where the rewriting result is confirmed. If the rewriting is completed normally, click ME
Rewrite the restriction status 24 of M22 to not be restricted (in this case, the corresponding PIN can be reused with another card), but if the rewriting of the usability symbol 4 of the telephone card 1 ends abnormally, the restriction will not be applied. Situation 24 will not be rewritten and will be rewritten next time. However, in either case, the outgoing connection request becomes a BT connection.

尚、公衆電話機5を収容している交換機11と、課金先
電話番号に対応する加入者を収容している交換機が別交
換機の場合は必要情報を交換機間で送受しネットワーク
で交換機11.別交換機のMEM22の交換側機能を実
現する。
If the exchange 11 that accommodates the public telephone 5 and the exchange that accommodates the subscriber corresponding to the billing telephone number are separate exchanges, the necessary information is sent and received between the exchanges and the exchange 11. This implements the exchange side function of MEM22 of another exchange.

また、テレホンカード1内の課金先電話番号2、暗証番
号3および使用可否信号4の情報をテレポンカード1に
予め登録するのは専用装置で行い、暗証番号23.規制
状況24の情報の登録は課金先電話番号に対応する加入
者を収容している交換機で行なう。
Further, information such as the billing telephone number 2, the PIN 3, and the availability signal 4 in the telephone card 1 is registered in advance in the telephone card 1 by a dedicated device, and the PIN 23. Information on the regulation status 24 is registered at the exchange that accommodates the subscriber corresponding to the billing telephone number.

〔発明の効果J 以1−説明1〜だように本発明は、少なくとも課金先電
話番号と、予め定められた暗証布しと、使用可否記号と
を含むカード情報を記憶するプリペイドカー ドと、こ
のプリペイドカードを使用して発呼できる公衆電話機と
、この公衆電話機を電話回線を介1〜で接続する交換機
とを備えて成り、前記公衆電話機は発呼時に前記交換機
から指示を受信しで111■記プリペイドカーF内のカ
ード情報を読出す読出手段および前記プリペイドカード
に使用す柘可否信じ−を書込む書込手段と、前記読出手
段で読出した前記カード情報を前記交換機へ送出する送
出手段とを有し、前記交換機は着呼時に発呼した前記公
衆電話機−\前記カード情報の送出を要求する情報要求
手段と、送られた前記カード情報を受信して分析する情
報分析手段と、この情報分析手段の分析結果により前記
公衆電話機に対する通話接続を制御する接続制御手段と
、通話終了時にカード情報に基づいて指定された加入者
の記憶エリアに通話課金度数を積算して記憶する言語窓
手段とを有することにより、課金先を指定できるため一
枚のテレホンカードで何回でも通話ができ、しかも−回
の通話でも料金不足が発生しないため遠距離通話も長時
間通話も可能になるなどテレホンカードでもクレジット
カード並みの機能を実現できる効果がある。
[Effect of the Invention J As described in 1-Explanation 1~, the present invention provides a prepaid card that stores card information including at least a billing telephone number, a predetermined password, and a usability symbol; It is equipped with a public telephone that can make a call using this prepaid card, and an exchange that connects this public telephone through a telephone line at 1 to 1, and the public telephone receives an instruction from the exchange when making a call. (3) A reading means for reading out the card information in the prepaid card F, a writing means for writing the acceptance/rejection information to be used in the prepaid card, and a sending means for sending the card information read by the reading means to the exchange machine. The exchange has information requesting means for requesting transmission of the card information from the public telephone that made the call when a call is received; information analysis means for receiving and analyzing the sent card information; connection control means for controlling the call connection to the public telephone based on the analysis result of the information analysis means; and language window means for accumulating and storing the call charge frequency in the storage area of the subscriber designated based on the card information at the end of the call. By having a telephone card, you can specify the billing destination, so you can make as many calls as you like with one phone card, and you can make long-distance calls as well as long-distance calls because you won't run out of money even after making -1 phone calls. This has the effect of allowing the card to perform functions similar to those of a credit card.

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

第1図は本発明の一実施例を示すブロック図、第2図は
第1図内の記憶装置の記憶構成の一例を示す図である。 1・・・・・テレホンカード、2・・・課金先電話番号
、3・・・・・・暗証番号、4・・・・・・使用可否記
号、5・・・・・公衆電話機、6・・・・・PB信号送
出部(PBS)、7・・・・カード制御情報受信部(C
8R)、8・・カード情報制御部(CDC)、9・・・
・・制御装置(CPU)、10・・・・・電話回線、1
1・・・・交換機、12・・加入者回路部(SLC)、
13・・・・・・加入者線走査装置部(LSCN)、1
4・・・・・・スイッチ部(SW)、15・・・・・可
聴音送信部(TNS)、16PB信号受信部(PBR)
、17−・ カーl・゛制御情報送信部(CS S)、
18 ・・スイッチ制御部(SWC)、19・・・・・
・課金メータ部(MET)、20・・・・・課金制御部
(CHC)、21・・中火制御装置(CC)、22・・
・・記憶装置(MEM)、23・・・・暗証番号、24
・・・・・規制状況。 代理人 弁理士  内 原   晋 第2図
FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the storage configuration of the storage device in FIG. 1. 1... Telephone card, 2... Billing phone number, 3... Password number, 4... Usability symbol, 5... Public telephone, 6... ...PB signal sending unit (PBS), 7...Card control information receiving unit (C
8R), 8...Card information control unit (CDC), 9...
...Control unit (CPU), 10 ...Telephone line, 1
1...Switchboard, 12...Subscriber circuit section (SLC),
13...Subscriber line scanning unit (LSCN), 1
4... Switch section (SW), 15... Audible sound transmitting section (TNS), 16 PB signal receiving section (PBR)
, 17-・Carl・control information transmitter (CSS),
18...Switch control unit (SWC), 19...
・Charging meter section (MET), 20... Charging control section (CHC), 21... Medium heat control device (CC), 22...
...Storage device (MEM), 23...Password, 24
...Regulatory status. Agent: Susumu Uchihara, patent attorney Figure 2

Claims (1)

【特許請求の範囲】[Claims]  少なくとも課金先電話番号と、予め定められた暗証番
号と、使用可否信号とを含むカード情報を記憶するプリ
ペイドカードと、このプリペイドカードを使用して発呼
できる公衆電話機と、この公衆電話機を電話回線を介し
て接続する交換機とを備えて成り、前記公衆電話機は発
呼時に前記交換機から指示を受信して前記プリペイドカ
ード内のカード情報を読出す読出手段および前記プリペ
イドカードに使用可否信号を書込む書込手段と、前記読
出手段で読出した前記カード情報を前記交換機へ送出す
る送出手段とを有し、前記交換機は着呼時に発呼した前
記公衆電話機へ前記カード情報の送出を要求する情報要
求手段と、送られた前記カード情報を受信して分析する
情報分析手段と、この情報分析手段の分析結果により前
記公衆電話機に対する通話接続を制御する接続制御手段
と、通話終了時にカード情報に基づいて指定された加入
者の記憶エリアに通話課金度数を積算して記憶する記憶
手段とを有することを特徴とするカード式公衆電話方式
A prepaid card that stores card information including at least a billing telephone number, a predetermined PIN, and a usage permission signal, a public telephone that can make calls using the prepaid card, and a telephone line that connects the public telephone to a telephone line. and an exchange connected to the prepaid card through a reading means for receiving an instruction from the exchange at the time of making a call and reading out the card information in the prepaid card, and writing a usability signal to the prepaid card. It has a writing means and a sending means for sending the card information read by the reading means to the exchange, and the exchange makes an information request requesting the sending of the card information to the public telephone that made the call when a call is received. means, information analysis means for receiving and analyzing the sent card information, connection control means for controlling the call connection to the public telephone based on the analysis result of the information analysis means, A card-type public telephone system, comprising a storage means for accumulating and storing call charges in a storage area of a designated subscriber.
JP24070190A 1990-09-11 1990-09-11 Card type public telephone system Pending JPH04120859A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24070190A JPH04120859A (en) 1990-09-11 1990-09-11 Card type public telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24070190A JPH04120859A (en) 1990-09-11 1990-09-11 Card type public telephone system

Publications (1)

Publication Number Publication Date
JPH04120859A true JPH04120859A (en) 1992-04-21

Family

ID=17063419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24070190A Pending JPH04120859A (en) 1990-09-11 1990-09-11 Card type public telephone system

Country Status (1)

Country Link
JP (1) JPH04120859A (en)

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