JPS5868332A - Filter control method - Google Patents

Filter control method

Info

Publication number
JPS5868332A
JPS5868332A JP56166929A JP16692981A JPS5868332A JP S5868332 A JPS5868332 A JP S5868332A JP 56166929 A JP56166929 A JP 56166929A JP 16692981 A JP16692981 A JP 16692981A JP S5868332 A JPS5868332 A JP S5868332A
Authority
JP
Japan
Prior art keywords
control signal
band
control
filter
exchange
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
JP56166929A
Other languages
Japanese (ja)
Inventor
Noriteru Shinagawa
準輝 品川
Minoru Koyama
稔 小山
Yukio Honda
本田　行雄
Akio Sasaki
佐々木　秋穂
Masayuki Sakamoto
坂本　正行
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 JP56166929A priority Critical patent/JPS5868332A/en
Publication of JPS5868332A publication Critical patent/JPS5868332A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters And Equalizers (AREA)
  • Meter Arrangements (AREA)
  • Prepayment Telephone Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To shorten the insertion time of a band rejection filter by inserting the band rejection filter on a control signal transmission side before the starting point of the standby of a control signal on a control signal reception side, and then securing a signal transmission band previously. CONSTITUTION:In a public telephone network connecting mobile communication equipment to an exchange, the public terminal A and the exchange B store a charging period T in controllers 9 and 10, and then start a telephone call to perform charging control at every period T. On the completion of said charging control, the exchange B allows the controller 10 to obtain the timing of time obtained by subtracting specified time DELTAT from the period T, and operates a switch 6 when the time is over to insert a band rejection filter 4 into a communication circuit, thereby securing a band for charging control signal transmission in the communication circuit. At the terminal A, the controller 9 obtains timing for only the period T after the completion of last charging control and a changeover switch 5 is operated when the time is over to insert a band rejection filter 3 into a communication circuit; and a transmitter and receiver 7 is turned on to monitor a signal from the exchange B through the controller 9.

Description

【発明の詳細な説明】 本発明はＳフィルタ制御方式に闘し、特に移動通信−■
を層−る蚤傘電話交換網にお妙る課金用制御信号伝送の
ためのフィルタ制御方式に関する−のである。DETAILED DESCRIPTION OF THE INVENTION The present invention addresses the S-filter control scheme, especially mobile communication-■
The present invention relates to a filter control method for transmitting billing control signals to a flea telephone exchange network.

自動車、列車ｉ：ｈ−は船舶等と交換機とを結ぶ移動逓
信回線を用−たｆｋ乗電話網では、課金用の制御信号を
伝送すると愈のみ、その信号伝送用帯域を確保すみため
に、１域削除用フイルタを逓信画線に挿入して１城を確
保した後、制御終了時には解除値量によ伽挿入されたフ
ィルタを解除して−る。In an FK telephone network using a mobile communication line connecting a ship, etc. and an exchange, in order to secure a band for signal transmission, when transmitting control signals for billing, After inserting the 1-area deletion filter into the transmission line to secure 1 area, the inserted filter is canceled according to the release value amount when the control ends.

第１閣は、移動選儒ａＳを用いた公蒙電話方式における
従来の課金制御シーケンス・チャージでｂる。The first step is the conventional charge control sequence charge in the public telephone system using mobile selection aS.

課金周期〒どとに、交換＠ｍｘかも課金準備信号ｆ１　
　が送られると、公衆端末？Ｕから課金準備確紹信号ｆ
、が返送され、次に貨幣収納信号らが送られることによ
シ、貨幣収納確認信号ｆ、が返送される。釆衆端末テＵ
におけるｔｌ　　の期間は、フィルタを回線に挿入して
、交換機１ｘからの制御信号ｆ、、　ｆ、　　を待機し
て−る期間であ襲、家先交換機ＩＸにおけるｔ、の期間
は、課金制御のためにａ線にフィルタを挿入している期
間である。Charging cycle: exchange@mx or charging preparation signal f1
When sent, is it a public terminal? Billing preparation confirmation signal f from U
, is sent back, and then the money storage signal f is sent back, whereby the money storage confirmation signal f is sent back. Chashu terminal TeU
The period tl is the period in which the filter is inserted into the line and is waiting for the control signals f,, f, from the exchange 1x, and the period t in the home exchange IX is the period when the charge control is performed. This is the period during which a filter is inserted into the a-line for this purpose.

衆端本ＴＵで制御信号ｆ１　　を待機して−ると龜、交
換＠ＩＸでは帯域削除Ｎフィルタを週ａａ線にまだ挿入
して−ないため、制御信号用の帯域が確保されて−ない
期間ｔ、が生じてし１．ｔ、の期間は、逓信内容（音声
）が会衆端末’！’Ｈの制御信号受信器に入力される状
態とな）、通信内容の中に制御ｆｌｌ＠と同じような曽
報會禽む場合には、会衆端末！Ｕの制御信号受信器が誤
動作することもある。また、公衆端末〒′Ｕ″ｔ’＊ｍ
削１用フィル御儒量の瞬断等を考慮し、信号の断検出後
十分なタイミングをとって、その後も制御信号がな−こ
七を確認してから帯域ｌｌ１ｌＷｋ用フイルタを解除し
てかる丸め、帯域１１ｉＷｋＭｙイルタの挿入時間が常
時ｔ、の期間だけ長く１に４・ 本発明の目的は、これらの従来の欠点をＷｋ＊するため
１通信内容に制御信号と同一の情報が含まれて−て％額
動作することなく、高精度の制御を■能とし、を先帝域
＊＊用フィルタの挿入時間を１翰して、道償寵纏の盲動
利用を図ることかでするフィルタ制御１式を提供するこ
とにある。When waiting for the control signal f1 in the main terminal TU, there is a period when the band for the control signal is not secured because the band deletion N filter has not yet been inserted in the weekly aa line in the exchange @IX. t has occurred and 1. During period t, the broadcast content (audio) will be sent to the congregation terminal'! 'H's control signal receiver), if the communication content contains a message similar to control fll@, then the congregation terminal! U's control signal receiver may malfunction. In addition, public terminals〒′U″t'＊m
Taking into account instantaneous interruptions in filter control for filter 1, take sufficient timing after detecting the signal interruption, and then release the filter for band ll1lwk after confirming that there is no control signal. Rounding off, the insertion time of the band 11iWkMy filter is always increased by the period t, and is reduced to 14.The purpose of the present invention is to eliminate these conventional drawbacks by reducing the number of times when one communication content contains the same information as the control signal. - Filter control 1 that enables high-precision control without having to operate, reduces the insertion time of the filter for the former imperial region by 1 kan, and aims to make blind use of the Dao Atonement Favor. The goal is to provide a formula.

上記Ｉ＃Ｉｊを達成する★め、本発明のフィルタ制御方
式は、通信中に帯域内の制御信号を伝送すると愈のみ曹
域閾論用フィルタを挿入して通信帯域〇−修を１ｌＩＩ
ｌｌＩＬ％こ０＠除帯域で制御信号の送受を行−１ｗ１
鐸償−号の録送を行わな−と亀に轄、帯域削除３１フイ
ルタを解除して逓信帯域のすべてを還−に使用すみ逓信
方式において、制御信号受信器で社、制御信号受信側の
制御信号待機開始時点よに前に帯域削１＆ｊ’１フィル
タを挿入して、あらかじめ１号送用帯域を確保しておく
とともに、制御終了後、制御信号受信側では、１ｉＩＩ
ＩｌｉＩ信号の断検出發、直ちに制御確認信号を断にし
て、帯域削除用フィルタを解除し、フィルタ解除後も制
御信号を監視する仁とを特徴として−る。In order to achieve the above I#Ij, the filter control method of the present invention inserts a range threshold filter only when a control signal within the band is transmitted during communication, and controls the communication band 〇-modification to 1lII.
llIL%ko0@Send and receive control signals in deband-1w1
In the Sumitomo Telecommunications system, the control signal receiver is used to control the control signal receiving side. Insert the band reduction 1&j'1 filter before the start of control signal standby to secure the No. 1 transmission band in advance, and after the control ends, on the control signal receiving side,
The present invention is characterized in that upon detection of the disconnection of the IliI signal, the control confirmation signal is immediately disconnected, the band deletion filter is canceled, and the control signal is monitored even after the filter is canceled.

以下、本発明の実施例を、図面によ伽説明する。Hereinafter, embodiments of the present invention will be explained with reference to the drawings.

第２図は、本発明の実施例を示す公衆電話逓信系のブー
ツタ図、第３図は本発明の実施例を示すフィルタ制御動
作のフローチャートである。FIG. 2 is a boot switch diagram of a public telephone system according to an embodiment of the present invention, and FIG. 3 is a flowchart of a filter control operation according to an embodiment of the present invention.

第２ｇに示すように、会幸端末ムと交換４１！１闘は通
信＠ｌ１ｌ１１を介して接続され、それぞれ通信内容を
送受する通信装置１および２、蕾域削Ｓｔ用フィルタ６
および番、帯域削除用フィルタの挿入用スイッチ５およ
び６、制御信号受信羨置丁およびＳｌおよび制御装ｗ９
およびｌＯが設けられる・ 公衆端本ムと交換機ＢＦｉ、互いに通話に入る前に課金
ｊｌｉＩ期信号の送受を行−１公衆端末ムおよび交換機
１社それぞれの制御装置９．１０で騨、金属層！を記憶
して選Ｉｉ歇劇にｓ〉、課金周期！ごとに課金制御を行
う。As shown in No. 2g, the exchange terminal 41!1 is connected via communication @l1l11, and the communication devices 1 and 2, which respectively send and receive communication contents, and the filter 6 for bud area removal St.
and number, switches 5 and 6 for insertion of band deletion filter, control signal reception switch and SL, and control device w9
The public terminal and exchange BFi transmit and receive charging signals before starting a call with each other. Memorize and select S〉, billing cycle! Charge control is performed for each transaction.

交換＄１１ｎａ、前の課金制ｆｌが終了すると、制御装
置１０で課金周期！から一定詩間へでだけ差し引−た時
間（〒−Δ〒）のタイミングをとり、タイムオーバとな
ったならば、スイッチ６を切り替えて、帯域ｌ１ｌＩｋ
用フィルタ４を通信回線に押入し、逓信ｉｉｓ中に課金
制御信号伝送用の帯域を確保しておく。　１にお、Δ〒
につ−ては、交換ＩＩＢが帯域ｔｍＷｋＭフィル＃番を
挿入する時点が、公衆端末ムで７４に＃３を挿入する時
点より先になる値をあらかじめ連室して、−御装置！１
０に記憶しておく。　以上の交換ｍｍｗの動作は、第３
図のステップ２１．２２で示される・ 公傘燗車五轄、菌量の課金制御終了後、制御装置９で課
金周期！だけタイミングをとり、タイムオーバしたなら
社切替スイッチ５を操作して帯域１１１ｋ　１１８　ｙ
イ＾り３を通信回線に挿入し、制御信号受信器〒をオン
にして交換機Ｐからの制御信号を制御装置９によ泗監視
する。以上の公衆端末ム側の動作は、第３図のステップ
１１．１２で示される・　５ｋｌＩＰ！端末ム側のむの
状態では、すでに交換機Ｂで帯域削除用フィルタ番が挿
入されているため、通信内容における制御信号と同一成
分はこの帯域削除用フィルタ４で削除され、端末ムの制
御信号送受ａ器７が通信内容によって誤動作することは
な≠・ 交換機Ｂでは、帯域削除用フィルタ番を挿入し先後、制
御装置１０で△テだけタイミングをとってから制御信号
送受信器８を動作させ、課金準備４１ｓ号ｆ０　　を送
出し、制御信号送受信Ｉ１８で会衆端末ムかもの課金準
備確認信号ｆ、を待機する（ステップ２３とｆｌ　　送
出）。Exchange $11na, when the previous billing system fl ends, the billing cycle starts in the control device 10! The timing is set by subtracting the time (〒-∆〒) from to a certain interval, and when the time is over, switch 6 is changed and the band l1lIk
A filter 4 is inserted into the communication line to secure a band for transmitting the billing control signal during the IIS broadcast. 1, Δ〒
For this, the time when the exchange IIB inserts the band tmWkM fill # number is earlier than the time when #3 is inserted into 74 at the public terminal. 1
Store it as 0. The above exchange mmw operation is the third
As shown in steps 21 and 22 in the figure, after the charging control of the amount of bacteria in the public heating vehicle is completed, the control device 9 controls the charging cycle! If the time is over, operate the company selector switch 5 and change the band to 111k 118y.
The controller 3 is inserted into the communication line, the control signal receiver (2) is turned on, and the control signal from the exchange (P) is monitored by the controller (9). The above operation on the public terminal side is shown in step 11.12 in FIG. 3. 5klIP! In the current state on the terminal side, the band deletion filter number has already been inserted in exchange B, so the same component as the control signal in the communication content is deleted by this band deletion filter 4, and the control signal transmission and reception of the terminal The A device 7 will not malfunction depending on the communication content.In the exchange B, after inserting the filter number for band deletion, the control device 10 operates the control signal transmitter/receiver 8 after setting the timing by △T, and then starts charging. The preparation 41s number f0 is sent, and the control signal transmission/reception I18 waits for the charge preparation confirmation signal f from the congregation terminal (step 23 and sending fl).

公Ｉ！！端末ムでは、制御信号送受信器７で課金準備信
号を受信したら制御装置９は貨幣のあることを確認し、
騨金準備ｉ＊ｍ信号ら　を制御信号送受信器〒を用−て
送出し、貨幣収納信号ｆ、の送られてくるのを待ち受け
る。Public I! ! At the terminal, when the control signal transmitter/receiver 7 receives the charging preparation signal, the control device 9 confirms that there is money,
The control signal transmitter/receiver 〒 sends out the coin preparation signals i*m, etc., and waits for the coin storage signal f to be sent.

交換機Ｂでは、制御信号送受信器８で課金等備確紹信号
ｆ、を検出すると貨幣収納信号１．　１制御信号送受信
Ｉ１６でｌｌ出し、貨幣収納完了信号ｆ４の遥られてく
るのを待ち受ける。In the exchange B, when the control signal transmitter/receiver 8 detects the billing, etc. confirmation signal f, the money storage signal 1. 1 control signal transmission/reception I16, and waits for the arrival of the coin storage completion signal f4.

会乗端傘ムで杜、制御信号送受信ＩＴで貨幣収納信号ｆ
、を受信すると貨幣を収納し、貨幣収納信号信４＃ｆ４
　　を送出し、制御装ｆｉ！９で課金周期Ｔのタイミン
グｔＷｋをｌｌ蛤する（第３図のステップ１５６履）・
　交換Ｉ１１では、貨幣収納完了信号ｔ、を受信すると
、貨幣収納信号ｆ、の送出を止め、制御装置１０で課金
周期（Ｔ−△Ｔ）のタイミング計数をｌｌ［ｌする（ス
テップ２番参照）。Mori at the meeting end umbrella, money storage signal f at control signal transmission/reception IT
, stores the coins and sends the coin storage signal signal 4#f4.
The control device fi! 9, the timing tWk of the charging cycle T is set (step 156 in FIG. 3).
When the exchange I11 receives the money storage completion signal t, it stops sending out the money storage signal f, and the control device 10 counts the timing of the charging cycle (T-△T) by ll[l (see step 2). .

会衆耀＊ムでは、制御信号送受信器７で貨幣収納信１）
ｆ、０断を検出と開時に貨幣収納完了１号ｆ４　　を停
止し１切替スイツチ６を切替え、帯域削除用７４ルタを
通信回線からはずす（ステップ１４参ｌ［）、　　貨幣
収納信号ｆ、の断は交換機で停止した場合と、７エージ
ンダ等による一所の場合がＴｏ為が、これらはＩｉ：別
で禽なり０このため公蛾端傘ムで−ｈ耳び貨幣収納信号
ｆ、を検出した場合は、交換−で貨幣収納完了信号ｆ、
を受信できていな−ことになる・この状態では、交換＠
Ｂでは公衆端末ムで貨幣収納が出来ていないと思ってお
艶、いつまでも貨幣収納信号ｆ、を送出することとなる
口そのため、公衆端末Ａでフィルタ解除後も、貨幣収納
信号ｆ、を監視し、再受信した場合は、貨幣収納信号を
受信している聞この信号により通話の訪客にならないよ
う削除するため、帯域削除用フィルタ５を再び挿入し、
貨幣収納完了信号ｆ４を送出する（ステップ１５　、１
６　、１７　、１８　、１９　。In the congregation, the control signal transmitter/receiver 7 sends the coin collection signal 1)
When f, 0 disconnection is detected and opened, money storage is completed No. 1 f4 is stopped, 1 changeover switch 6 is switched, 74 router for band deletion is disconnected from the communication line (see step 14 l[), money storage signal f is disconnected. For this reason, the -h ear coin storage signal f was detected at the public moth end umbrella. In this case, exchange- and coin storage completion signal f,
・In this state, exchange@
B assumes that public terminal A is not able to store money and continues to send out the coin storage signal f, so even after the filter is removed at public terminal A, the money storage signal f is monitored. , If the money storage signal is received again, the band deletion filter 5 is reinserted in order to delete the signal so that the signal does not become a call visitor.
Sends the money storage completion signal f4 (step 15, 1
6, 17, 18, 19.

２０参Ｉｔ）。20 It).

交換機１では、貨幣収納完了信号ｆ、の断を検礪しえら
、切替スイッチ６を切替え、帯域削除用フィルタ番を通
信回線からはずす（ス汐プ２６参照）。　交換４１ｉＢ
及び公衆端末ムは、制御装置９゜１０でタイミング・オ
ーバーになったら再び以上に説明した動作ｔａｂ返し課
金制御を行う。The exchange 1 checks for disconnection of the money storage completion signal f, switches the selector switch 6, and removes the band deletion filter number from the communication line (see switch 26). Exchange 41iB
When the timing is exceeded by the control devices 9 and 10, the public terminals perform the above-described tab return charging control again.

このように、第３図では、公衆端末ムで課金制御信号を
待ち受ける以前に、交換機で帯域削除用フィル＃番を通
信回線に挿入し、課金制御信号伝送用の帯域を確保して
いるため、通信内容に課金制御信号と同【成分を含んで
−ても、会衆端末ムの制御信号送受信ＩＩ７が誤動作す
ることは１に−０また、蕾域劇除ｌ！１フィルタ３の解
除を、課金制御信号の瞬断判定を行わずに解除で禽るた
め、帯域削除Ｉｇｙイルタの挿入時間を短かくすること
がで禽、通信回線をｉ効に使えゐ。In this way, in FIG. 3, before the public terminal waits for the billing control signal, the exchange inserts the band deletion filter number into the communication line to secure the band for transmitting the billing control signal. Even if the communication content contains the same component as the billing control signal, the control signal transmission/reception II 7 of the congregation terminal may malfunction. 1. Since the filter 3 can be canceled without performing a momentary interruption determination of the billing control signal, the insertion time of the band deletion Igy filter can be shortened, and the communication line can be used more effectively.

以上説明したように、本発明によれば、制御信号受信側
の帯域麺除層フィルタの挿入を制御信号受信側が制御信
号を朧視する以前に遍Ｉｌ＠線に挿入し、制御信号伝ｌ
ＩＭに帯域を確保しているため、逓信内容に制御信号と
同じ情報が含まれていても鋲って制御を行うことがなく
＆伽、精度のよ一制御が爾龍となる・ｔえ、蕾域削除用
フィルタをはずした後も、制御信号の再受信の監視を行
っているため、制御信号の一所検出を行う必要がなくな
勤、帯域削除用フィルタの挿入時間を短かくでき、遍儒
闘纏を有効にｌ１Ｍできる。As explained above, according to the present invention, the band layer removal filter on the control signal receiving side is inserted into the Il@ line before the control signal receiving side blurs the control signal, and the control signal transmission
Since the bandwidth is secured for IM, even if the transmission content contains the same information as the control signal, there is no need to override the control.Accurate control is the key. Even after removing the bud region deletion filter, the re-reception of the control signal is monitored, so there is no need to detect the control signal at one point, and the time required to insert the band deletion filter can be shortened. You can effectively l1M the Henju Fighting Clothes.

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

第ｉｍｌは移動遥儒−纏を用ｖｋた公衆電話方式の課金
制御シーケンスーチャー）、第２図は本発明の爽施偶を
示す会秦電話通信系のブシツク図、第５図は本発明の実
施例を示すフィルタ制御動作の７−−チヤーシである・ １．２：逓信装置、３．４：帯域削除用フィルタ、５　
ｇ　６　ｓ切替スイッチ、７．８ｇ制御信号送受信器、
９，１０１制御装置、１１１通信逓信ｌ。 Ａｔ公宗端末、Ｂ：交換機。Fig. 2 is a schematic diagram of a telephone communication system of the present invention, and Fig. 5 is a diagram of the billing control sequence of a public telephone system using a mobile telephone system. 7--Charge of filter control operation showing an example 1.2: Transmission device, 3.4: Band removal filter, 5
g6s selector switch, 7.8g control signal transmitter/receiver,
9,101 control equipment, 111 communication transmission l. At Gongjong terminal, B: Switching machine.

Claims (1)

【特許請求の範囲】[Claims] （１）遷儒中に帯域内の制御信号を伝送すると愈のみ、
關線に帯域削除用フィルタを挿入し、制御終了時には上
記帯域削除用フィルタを解除する逓信方式にお−て、制
御信号送出側と受信側の制御部による帯域削除用フィル
タの制御タイミングを変更し、制御信号送出側で社制御
信号受信側の制御豊号待機開始時点よ〉前に蕾城劇除用
フィルタを挿入して、あらかじめ信号伝送用帯域を確保
することを特徴とするフィルタ制御方式。 Ｑ通信中に帯域内の制御信号を伝送すると自のみｑ１１
線に帯域１１１１１１に用アイ＃りを挿入し、制御終了
時には上記帯域削除用フィルタを解除すゐ選儒方式にお
−て、制御信号送出側と受信側の制御部による帯域削除
用フィルタの制御タイミングを変更し、制御終了後、帯
域削除用フィル＃を解除するときには、制御信号受信側
が制御信号断を検出後、直ちに制御確譚儒量を断にして
帯域削除用フイに＃を解−し、フィルタ解除後も制御信
号を監視して、■御儒晋検出時には再び帯域削除用アイ
、＆りを挿入して■御確■信号を送出することを特徴と
するフィルタ制御方式。(1) If a control signal within the band is transmitted during transition,
In a communication system in which a band deletion filter is inserted into the main line and the band deletion filter is released when the control ends, the timing at which the band deletion filter is controlled by the control units on the control signal sending side and the receiving side is changed. , a filter control method characterized in that a filter for filtering out filters is inserted on the control signal sending side before the start of control standby on the control signal receiving side to secure a band for signal transmission in advance. If a control signal within the band is transmitted during Q communication, only Q11
The band deletion filter is controlled by the control unit on the control signal sending side and the receiving side in a selective method in which a line is inserted into the band 111111 and the band deletion filter is released when the control ends. When changing the timing and canceling the band deletion fill # after the control ends, the control signal receiving side detects the control signal disconnection, immediately turns off the control confirmation amount, releases the # to the band deletion fill, and then removes the filter. The filter control method is characterized in that the control signal is monitored even after the release, and when the control signal is detected, the band deletion eye and the signal are inserted again and the control signal is sent out.
JP56166929A 1981-10-19 1981-10-19 Filter control method Pending JPS5868332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56166929A JPS5868332A (en) 1981-10-19 1981-10-19 Filter control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56166929A JPS5868332A (en) 1981-10-19 1981-10-19 Filter control method

Publications (1)

Publication Number Publication Date
JPS5868332A true JPS5868332A (en) 1983-04-23

Family

ID=15840271

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56166929A Pending JPS5868332A (en) 1981-10-19 1981-10-19 Filter control method

Country Status (1)

Country Link
JP (1) JPS5868332A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009113586A (en) * 2007-11-05 2009-05-28 Toyota Motor Corp Vehicular table device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009113586A (en) * 2007-11-05 2009-05-28 Toyota Motor Corp Vehicular table device

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