JPS6179351A - Automatic dial-tone connecting system when called subscriber line is busy - Google Patents

Abstract

PURPOSE:To automatically send dial tone to a called subscriber when his line is busy, by providing a calling subscriber class discriminating memory which discriminates the class of calling subscribers and makes recalling possible when a relevant calling subscriber meets line's busy on a called subscriber side and a counter memory for specifying a recalling number of times. CONSTITUTION:When a calling subscriber 1 dials to call up a called subscriber, the received figures are analyzed in an exchange and, when the received numerals are correct and the called side is vacant, the calling subscriber 1 is properly connected with the called side. However, when the received numerals are not correct or the called side is busy, the connection is not performed and busy tone BT is sent to the calling subscriber 1 from a busy tone generator 4. Then direct transition from the state where the busy tone is sent to another state where specifying tone is sent is not made, but whether or not the calling subscriber joins this service is read out and discriminated from a memory. When the calling subscriber joins this service, the busy tone sending state is transferred to a dial tone sending state, and thus, a recallable condition is set. In addition, a counter memory for counting the recalling number of times is provided and, when the recalling number of times exceeds a specified value, the recalling is stopped.

Description

【発明の詳細な説明】 （技術分野） 本発明は自動構内交換機の被呼側話中時における自動ダ
イヤルトーン接続方式に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an automatic dial tone connection system when the called side of an automatic private branch exchange is busy.

（従来技術） 従来、自動構内交換機において、発呼者がある被呼者を
呼出そうとした時、被呼側話中であった場合、一定時間
話中音を送出し、その後ある一定時間全越えると使用不
可状態としていた。（ロックアウト状態）。(Prior art) Conventionally, in an automatic private branch exchange, when a caller attempts to call a called party and the called party is busy, a busy tone is sent for a certain period of time, and then a busy tone is output for a certain period of time. If the limit was exceeded, it was deemed unusable. (locked out).

この場合再発信可能状態とするためには、発呼者側が一
定時間受話器を置き、ロックアウト状態から空状態に戻
してからでないと再発信ができず操作面で不便であった
。In this case, in order to be able to make a re-call, the caller must put down the handset for a certain period of time and return from the lockout state to the idle state before the call can be made again, which is inconvenient in terms of operation.

（発明の目的） 本発明の目的は被呼側が話中の時、自動的に再発信を可
能とすることにより前記欠点全除去し受話機をそのまま
の状態で再発信を可能とする自動クラスを識別し該当す
る発呼者が発信時被呼側話中に遭偶した時再度発呼者を
発信レジスタトランクに接続し再発信を可能とさせるた
めの発呼者クラス識別メモリと、再発信７に０Ｔ能とす
る回数を指定するためのカウンタメモリとを備える事を
特徴とする自動ダイヤルトーン接続方式が得られる。(Object of the Invention) The object of the present invention is to eliminate all of the above-mentioned drawbacks by making it possible to automatically make a re-dialing when the called party is busy, and to create an automatic class that makes it possible to make a re-dialing while the receiver is in the same position. A calling party class identification memory for identifying and connecting the calling party to the calling register trunk again to enable re-calling when the called party encounters the called party while the called party is talking at the time of making a call, and re-calling 7. An automatic dial tone connection system is obtained, characterized in that the automatic dial tone connection system is provided with a counter memory for specifying the number of times the 0T function is enabled.

（実施例） 次に、本発明の実施例について図面を参照して説明する
。第１図は本発明の一実施例の状態遷移図である。(Example) Next, an example of the present invention will be described with reference to the drawings. FIG. 1 is a state transition diagram of an embodiment of the present invention.

第１図において発呼者（ＳＴＡ−Ａ）１が空状態（状態
（１））から、オフフックすると発信レジスタトランク
（（ＪａＴ）　３　　と接続され、発呼者１に対してダ
イヤルトーン発呼者２からダイヤルトーン（ＤＴ）が送
出される。（状態（２）入次に発呼者ｌが被呼側を呼び
出すだめのダイヤルをすると、このダイヤル情報は発信
レジスタトランク（ＯａＴ）３で受信される。（状態（
３）入その後、交換機内で受信数字の分析が行なわれ、
受信数字が正しく又、被呼側が空状態であれば発呼者１
と被呼側は正常に接続される。In FIG. 1, when the calling party (STA-A) 1 goes off-hook from the idle state (state (1)), it is connected to the originating register trunk ((JaT) 3, and a dial tone calling party is sent to the calling party 1. A dial tone (DT) is sent from 2. (State (2)) Next, when the calling party l dials to call the called party, this dialing information is received by the originating register trunk (OaT) 3. (state (
3) After entering, the received digits are analyzed in the exchange,
Caller 1 if the received digits are correct and the called party is empty.
and the called party is successfully connected.

しかし受信舷字不良、被呼側話中の場合は接続は行なわ
れず、発呼者に対して話中音発生器４よリビジートーン
（ＢＴ）が送出される。（状態（４））ビジートーン送
出後は従来の方法ではビジートーンを一定時間送出後、
発呼者に規制音を送出していた。However, if the receiving side is bad or the called party is busy, the connection is not established and the busy tone generator 4 sends a busy tone (BT) to the calling party. (State (4)) After sending out the busy tone, in the conventional method, after sending out the busy tone for a certain period of time,
A control tone was being sent to the caller.

本発明ではビジートーン送用の状態から直接規制音送出
の状態に遷移させず、発呼者の本サービスの有／無をメ
モリから読み出して判定し、本す−ビス有の時はビジー
トーン送出の状態から発信音送出の状態（状態（２））
に遷移させ、再度、発信可能とさせる。従って本発明で
は被呼側話中に遭偶しても一度受話器装置く事なく再鼓
ダイヤルが可能となる。In the present invention, instead of directly transitioning from the busy tone sending state to the restriction sound sending state, the presence/absence of this service by the caller is determined by reading it from the memory, and when this service is present, the busy tone sending state is executed. State of transmission of dial tone (state (2))
, and make it possible to make calls again. Therefore, in the present invention, even if an accident occurs while the called party is talking, it is possible to dial the dial again without having to leave the handset once.

また、本発明においては一変捕捉された発信レジスタト
ランク（ＯＦｔＴ）３　は常時〆発呼者に保留されるこ
ととな一す、交換機の処理能力にも影響を与える事とな
るので、再発信の回数を計数するカウンタメモリを設は
指定回数μＦ達した場合は再発信は中止させ、従来の規
制音送出の状態に遷移させ、交１！！機の処理能力に影
響を辱えない様にしである。この指定回数は可変に設定
できるものとする。In addition, in the present invention, the outgoing register trunk (OFtT) 3 that has been completely captured is always held by the calling party, which also affects the processing capacity of the exchange, so it is difficult to re-call. A counter memory is set up to count the number of times, and when the specified number of times μF is reached, the re-transmission is stopped, the state is changed to the conventional regulation sound transmission state, and the signal is changed to 1! ! This is done so as not to affect the processing capacity of the machine. This specified number of times can be set variably.

（発明の効果） 本発明を被呼者が話中であっても発呼者に７ツキング操
作をきせる必要がない効果がある。(Effects of the Invention) The present invention has the advantage that even if the called party is busy, there is no need for the calling party to perform any dialing operations.

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

第１図は本発明の一実施例の状態遷移図である。 １・・・・・・内線、２・・・・・・発信音、３・・・
・・・発信レジスタトランク、４・・・・・・話中音、
５・・・・・・規制音。FIG. 1 is a state transition diagram of an embodiment of the present invention. 1...Extension, 2...Dial tone, 3...
... Outgoing register trunk, 4... Busy tone,
5...Regulation sound.

Claims (1)

【特許請求の範囲】[Claims] 自動構内交換機において発呼者クラスを識別し該当する
発呼者が発信時被呼側話中に遭偶した時再度発呼者を発
信レジスタトランクに接続し再発信を可能とさせるため
の発呼者クラス識別メモリと、再発信を可能とする回数
を指定するためのカウンタメモリとを備える事を特徴と
する自動ダイヤルトーン接続方式。A call is made to identify the caller class in an automatic private branch exchange and to connect the caller to the calling register trunk again to enable re-calling when the corresponding caller encounters the called party talking at the time of making a call. An automatic dial tone connection system characterized by comprising a user class identification memory and a counter memory for specifying the number of times re-dialing is possible.