JP2659958B2 - Private branch exchange - Google Patents

Private branch exchange

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Publication number
JP2659958B2
JP2659958B2 JP62171432A JP17143287A JP2659958B2 JP 2659958 B2 JP2659958 B2 JP 2659958B2 JP 62171432 A JP62171432 A JP 62171432A JP 17143287 A JP17143287 A JP 17143287A JP 2659958 B2 JP2659958 B2 JP 2659958B2
Authority
JP
Japan
Prior art keywords
extension
distributed response
response
distributed
incoming call
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
JP62171432A
Other languages
Japanese (ja)
Other versions
JPS6416055A (en
Inventor
敬治 山本
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP62171432A priority Critical patent/JP2659958B2/en
Publication of JPS6416055A publication Critical patent/JPS6416055A/en
Application granted granted Critical
Publication of JP2659958B2 publication Critical patent/JP2659958B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は分散応答機能を有する機内交換機に係り、特
に分散応答機能における局線の着信と内線・局線間の接
続の方式に関する。
The present invention relates to a private branch exchange having a distributed response function, and more particularly, to a local exchange in a distributed response function and a connection between an extension and an office line. About the method.

(従来の技術) 構内交換機においては、一般に局線をグループ(以
下、グループをテナントという)に分割し、局線からの
着信時に着信した局線のテナントと同一テナントに属す
る扱者と呼ばれる電話機に着信させ、着信した呼をその
扱者が内線に転送することで局線からの着信に応答して
いる。このとき扱者が使用中および不在の場合、分散応
答用ベル(UNAベル)を鳴動させ、内線からの特番操作
で直接内線から応答できるようになっている。このよう
に局線からの着信に内線が直接応答できる機能を分散応
答機能という。
(Prior Art) In a private branch exchange, generally, an office line is divided into groups (hereinafter, the group is referred to as a tenant), and a telephone called an operator belonging to the same tenant as the office line tenant received when receiving an incoming call from the office line. The incoming call is received, and the incoming call is transferred to the extension by the operator to respond to the incoming call from the office line. At this time, if the operator is in use or absent, the dispersing response bell (UNA bell) is sounded, and a response can be made directly from the extension by operating a special number from the extension. Such a function that the extension can directly respond to the incoming call from the office line is called a distributed response function.

この従来の分散応答方式においては分散応答用ベルが
一台であり、局線のテナントと内線のテナントとの対応
関係がなく、一旦局線が分散応答着信をすると、内線か
ら特番操作を行なうことでテナントに関係なく全ての内
線から応答できてしまう。従って、分散応答時には局線
および内線をテナント分けした意味がなくなり、例えば
複数のテナントが別々の会社に割当てられているような
場合、大いに混乱を来たす。
In this conventional distributed response system, there is only one distributed response bell, and there is no correspondence between the tenant of the line and the tenant of the extension. Once the line receives the distributed response, the special number operation is performed from the extension. Can respond from all extensions regardless of the tenant. Therefore, it is not meaningful to divide the office line and the extension into tenants at the time of distributed response. For example, when a plurality of tenants are assigned to different companies, there is much confusion.

(発明が解決しようとする問題点) このように従来の構内交換機における分散応答方式で
は、分散応答時に局線のテナントと内線のテナントとの
対応がなくなり、局線が分散応答着信すると全ての内線
から応答できてしまうという問題があった。
(Problems to be Solved by the Invention) As described above, in the distributed response system in the conventional private branch exchange, there is no correspondence between the tenant of the local line and the tenant of the internal line at the time of the distributed response. There was a problem that it was possible to respond from.

本発明はこのような問題点を解決するためになされた
もので、分散応答用ベルを複数個設置するとともに、個
々の分散応答用ベルに対応して着信および応答ができる
テナントを設定して、分散応答着信した局線のテナント
に対応するテナントの内線だけが分散応答できるように
した構内交換機を提供することを目的とする。
The present invention has been made in order to solve such problems, while installing a plurality of distributed response bells, by setting a tenant that can receive and respond to each of the distributed response bells, It is an object of the present invention to provide a private branch exchange in which only an extension of a tenant corresponding to a tenant of a station line that has received a distributed response can perform a distributed response.

[発明の構成] (問題点を解決するための手段) 本発明に係わる構内交換機は、特に分散応答機能に係
わる構成として、分散応答時の局線からの着信を表示す
るための複数の分散応答用ベルと、これら複数の分散応
答用ベルを、予め構成された複数の局線テナントおよび
複数の内線テナントに各々対応付けて設定し、その対応
関係を分散応答データテーブルに記憶するためのテナン
ト設定手段と、局線からの着信に対し予め定めた扱い者
が応答しない場合に、当該着信が到来した局線を含む局
線テナントに対応する分散応答用ベルを上記分散応答デ
ータテーブルに記憶された対応関係から決定し、この決
定した分散応答用ベルに着信表示を行なわせる分散応答
用ベル決定手段と、内線で分散応答入力操作が行なわれ
た場合に、当該内線を含む内線テナントに対応する分散
応答用ベルおよびこの分散応答用ベルに対応する局線テ
ナントを、上記分散応答データテーブルに記憶されてい
る対応関係からそれぞれ探索し、この探索結果に基づい
て、上記分散応答入力操作が行なわれた内線を含む内線
テナントと上記着信が到来している局線を含む局線テナ
ントとが対応しているか否かを判定するための判定手段
と、この判定手段により対応していると判定された場合
に上記分散応答入力操作が行なわれた内線を上記着信が
到来している局線に接続し、一方対応していないと判定
された場合には上記分散応答入力操作が行なわれた内線
に対し接続規制処理を行なう応答局線決定手段とを備え
たものである。
[Configuration of the Invention] (Means for Solving the Problems) The private branch exchange according to the present invention has a plurality of distributed responses for displaying an incoming call from an office line at the time of a distributed response, particularly as a configuration related to a distributed response function. And the plurality of distributed response bells are set in association with a plurality of pre-configured office line tenants and a plurality of extension tenants, respectively, and a tenant setting for storing the correspondence in the distributed response data table Means, when the predetermined handler does not respond to the incoming call from the office line, the distributed response bell corresponding to the office line tenant including the office line from which the incoming call arrived is stored in the distributed response data table. A distributed response bell determining means for determining from the correspondence and displaying the incoming call on the determined distributed response bell, and including the extension when the distributed response input operation is performed on the extension. A distributed response bell corresponding to the extension tenant and a station line tenant corresponding to the distributed response bell are respectively searched from the correspondence stored in the distributed response data table, and based on the search result, the distributed response is determined. A determination unit for determining whether the extension tenant including the extension on which the input operation has been performed and the office line tenant including the office line from which the incoming call has arrived, and the determination unit When it is determined that the incoming call has been received, the extension on which the distributed response input operation has been performed is connected to the station line from which the incoming call has arrived. Response line determining means for performing a connection restriction process for the specified extension.

(作用) 本発明においては、局線および内線のテナントと分散
応答用ベルとの関係を決定し、この関係に従って局線か
らの着信に対する分散応答用ベルの鳴動と、内線からの
特番操作による分散応答入力に対する応答局線の決定を
行なうことにより、分散応答着信した局線のテナントに
対応した内線だけが着信中の局線に応答することが可能
となる。
(Operation) In the present invention, the relation between the tenant of the central office and the extension and the distributed response bell is determined, the ringing of the distributed response bell for the incoming call from the central office is performed according to the relation, and the distribution is performed by the special number operation from the extension. By determining the response office line in response to the response input, only the extension corresponding to the tenant of the office line that has received the distributed response can respond to the incoming office line.

(実施例) 第1図は本発明の一実施例に係る構内交換機の概略的
な構成を示すもので、交換回路1、局線回路2、内線回
路3、内線電話機4、制御装置5、保守ターミナル6、
記憶装置7および複数個の分散応答用ベル8を有する。
(Embodiment) FIG. 1 shows a schematic configuration of a private branch exchange according to an embodiment of the present invention, in which a switching circuit 1, an office line circuit 2, an extension circuit 3, an extension telephone 4, a control device 5, a maintenance device, and the like. Terminal 6,
It has a storage device 7 and a plurality of distributed response bells 8.

第2図は第1図における制御装置5および記憶装置7
内の分散応答機能に関する部分の構成を説明するための
機能ブロック図である。
FIG. 2 shows the control device 5 and the storage device 7 in FIG.
FIG. 3 is a functional block diagram for describing a configuration of a portion related to a distributed response function in the inside.

テナント設定手段11は、ユーザーにより保守ターミナ
ル6を介して入力されたテナント番号データを読込み、
それをビットデータに変換して記憶装置7内の分散応答
データテーブル15に書込む。
The tenant setting means 11 reads the tenant number data input by the user via the maintenance terminal 6,
It is converted into bit data and written into the distributed response data table 15 in the storage device 7.

分散応答用ベル決定手段12は、局線が分散応答着信を
するとき、分散応答データテーブル15とその局線のテナ
ントから、鳴動させるべき分散応答用ベルを決定し、そ
の分散応答用ベルを鳴動させるとともに、局線を着信状
態にする。
The distributed response bell determining means 12 determines a distributed response bell to be ringed from the distributed response data table 15 and the tenant of the line when the line receives a distributed response, and rings the distributed response bell. At the same time, and place the office line in the receiving state.

応答局線決定手段13は、内線が特番操作により分散応
答入力を行なったとき、先ずその内線のテナント番号と
分散応答データテーブル15とから、その内線のテナント
に対応する分散応答用ベルを求める。そして、この分散
応答用ベルの鳴動によって着信表示されている局線を探
して応答局線として決定し、その応答局線と内線とを接
続する。
When the extension receives the distributed response by the special number operation, the response station line determining means 13 first obtains a distributed response bell corresponding to the tenant of the extension from the tenant number of the extension and the distributed response data table 15. Then, the station line indicated by the ringing of the distributed response bell is searched for and determined as the response station line, and the response station line and the extension are connected.

分散応答用ベル鳴動停止手段14は、応答局線決定手段
13により決定された応答局線の着信表示を行なっていた
分散応答用ベルの鳴動を停止させる。また、着信中の局
線が復旧したときも、その着信表示を行なっていた分散
応答用ベルの鳴動を停止させる。
The distributed response bell ringing stopping means 14 is a response station line determining means.
The ringing of the distributed response bell, which has been displaying the incoming call of the answering station line determined in step 13, is stopped. Also, when the incoming line is restored, the ringing of the distributed response bell which is displaying the incoming call is stopped.

第3図はテナント設定手段11の動作を示すフローチャ
ートである。まず、これから局線および内線のテナント
との対応関係の登録を行なうべき分散応答用ベルの番号
を表示してユーザーに知らしめ(ステップ31)、次いで
ユーザーにより保守ターミナル6を介して入力されたテ
ナント番号データを読込む(ステップ32)。次に、読込
んだテナント番号データから分散応答データテーブル15
の対応ビットを“1"にセットする。例えば読込んだテナ
ント番号データがTEN0なら、D0ビットを“1"にセットす
る。一方、読込まれなかったテナント番号データに対応
するビットを“0"にセットする(ステップ33)。これら
ステップ31〜33の処理を分散応答用ベルの個数分だけ繰
返す(ステップ34)。
FIG. 3 is a flowchart showing the operation of the tenant setting means 11. First, the number of the distributed response bell to be registered with the tenant of the office line and the extension to be registered is displayed to inform the user (step 31), and then the tenant input by the user via the maintenance terminal 6 is displayed. The number data is read (step 32). Next, from the read tenant number data, the distributed response data table 15
Set the corresponding bit of “1” to “1”. For example, if the read tenant number data is TEN 0 , the D 0 bit is set to “1”. On the other hand, the bit corresponding to the tenant number data that has not been read is set to “0” (step 33). These processes of steps 31 to 33 are repeated by the number of distributed response bells (step 34).

第4図は局線が分散応答着信するときの処理手順を示
すフローチャートである。まず、分散応答着信しようと
している局線のテナント番号を読出す(ステップ41)。
次に、ステップ41で読込んだテナント番号に対応する分
散応答用ベルを分散応答データテーブル15から求め(ス
テップ42)、次いで、ステップ42で求めた分散応答用ベ
ルを鳴動させるとともに、上記の局線を着信状態にする
(ステップ43)。
FIG. 4 is a flowchart showing a processing procedure when the central office receives a distributed response. First, the tenant number of the station line for which a distributed response is to be received is read (step 41).
Next, a distributed response bell corresponding to the tenant number read in step 41 is obtained from the distributed response data table 15 (step 42). Then, the distributed response bell obtained in step 42 is sounded, and The line is set to the incoming state (step 43).

第5図は内線が分散応答を行なうときの処理手順を示
すフローチャートである。まず、分散応答入力として特
番操作を行なった内線のテナント番号を読込む(ステッ
プ51)。次いで、ステップ51で読込んだテナント番号に
対応する分散応答用ベルの番号を分散応答データテーブ
ル15から求める(ステップ52)。次に、ステップ52で求
めた分散応答用ベルの鳴動によって着信表示がされてい
る局線を探す(ステップ53)。そして、ステップ54によ
り着信表示されている局線が無いと判断された場合は、
分散応答入力の特番操作を行なった内線に接続規制音
(オーバーフロートーン)を返す(ステップ55)。一
方、ステップ54において着信表示されている局線が有る
と判断された場合は、分散応答入力の特番操作を行なっ
た内線とステップ53で求めた局線とを接続する(ステッ
プ56)。そして、最後にステップ56で内線と接続された
局線のテナントに対応した分散応答用ベルの鳴動を停止
する(ステップ57)。
FIG. 5 is a flowchart showing a processing procedure when the extension makes a distributed response. First, the tenant number of the extension on which the special number operation was performed is read as the distributed response input (step 51). Next, the number of the distributed response bell corresponding to the tenant number read in step 51 is obtained from the distributed response data table 15 (step 52). Next, a station line on which an incoming call is indicated by the ringing of the distributed response bell determined in step 52 is searched (step 53). If it is determined in step 54 that there is no incoming line displayed,
A connection restriction tone (overflow tone) is returned to the extension on which the special number operation of the distributed response input has been performed (step 55). On the other hand, if it is determined in step 54 that there is a station line indicated as incoming, the extension on which the special number operation of the distributed response input has been performed is connected to the station line obtained in step 53 (step 56). Finally, in step 56, the ringing of the distributed response bell corresponding to the tenant of the office line connected to the extension is stopped (step 57).

このようにして、分散応答着信した局線のテナントに
対応するテナントの内線だけが分散応答することが可能
となり、他のテナントの内線が応答してしまうことを防
止することができる。
In this manner, only the extension of the tenant corresponding to the tenant of the station line that has received the distributed response can perform the distributed response, and it is possible to prevent the extension of another tenant from responding.

[発明の効果] 以上詳述したように本発明では、複数の分散応答用ベ
ルを、予め構成された複数の局線テナントおよび複数の
内線テナントに各々対応付けて設定して、その対応関係
を分散応答データテーブルに記憶しておき、局線からの
着信に対し予め定めた扱い者が応答しない場合に、当該
着信が到来した局線を含む局線テナントに対応する分散
応答用ベルを上記分散応答データテーブルに記憶された
対応関係から決定して、この決定した分散応答用ベルに
着信表示を行なわせる。そして、この状態で内線で分散
応答入力操作が行なわれた場合に、当該内線を含む内線
テナントに対応する分散応答用ベルおよびこの分散応答
用ベルに対応する局線テナントを、上記分散応答データ
テーブルに記憶されている対応関係からそれぞれ探索し
て、この探索結果に基づいて、上記分散応答入力操作が
行なわれた内線を含む内線テナントと上記着信が到来し
ている局線を含む局線テナントとが対応しているか否か
を判定し、対応していると判定された場合に上記分散応
答入力操作が行なわれた内線を上記着信が到来している
局線に接続し、一方対応していないと判定された場合に
は上記分散応答入力操作が行なわれた内線に対し接続規
制処理を行なうようにしている。
[Effects of the Invention] As described in detail above, in the present invention, a plurality of distributed response bells are set in association with a plurality of pre-configured central office tenants and a plurality of extension tenants, respectively, and the correspondence is established. Stored in the distributed response data table, and when the predetermined handler does not respond to the incoming call from the office line, the distributed response bell corresponding to the office line tenant including the office line from which the incoming call arrives is distributed to the distributed response data table. It is determined from the correspondence stored in the response data table, and the determined distributed response bell is caused to display an incoming call. When a distributed response input operation is performed on the extension in this state, the distributed response bell corresponding to the extension tenant including the extension and the office line tenant corresponding to the distributed response bell are stored in the distributed response data table. , And based on the search result, an extension tenant including the extension on which the distributed response input operation has been performed and a station line tenant including the station line from which the incoming call has arrived. It is determined whether or not it is compatible, and if it is determined that it is compatible, the extension on which the distributed response input operation has been performed is connected to the office line from which the incoming call has arrived, while one of which is not supported If it is determined that the extension has been performed, the connection restriction process is performed on the extension on which the distributed response input operation has been performed.

したがって本発明によれば、分散応答着信した局線を
含む局線テナントに対応した内線だけが着信中の局線に
対し応答することが可能となる。
Therefore, according to the present invention, only the extension corresponding to the office line tenant including the office line receiving the distributed response can respond to the incoming office line.

従って、例えばビルの1階と2階をテナント1とテナ
ント2に分け、それぞれに局線と内線を割当てた場合、
1階に着信した呼は1階の内線だけが応答できるように
なり、1階と2階が別々の会社等であっても混乱を招く
ことがないという利点がある。
Therefore, for example, when the first floor and the second floor of the building are divided into tenant 1 and tenant 2, and the office line and the extension are assigned respectively,
A call arriving on the first floor can be answered only by the extension on the first floor, and there is an advantage that confusion does not occur even if the first floor and the second floor are separate companies.

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

第1図は本発明の一実施例に係る構内交換機の概略構成
図、第2図は同実施例における分散応答機能に関する部
分の構成を示す機能ブロック図、第3図は第2図におけ
るテナント決定手段の動作を説明するためのフローチャ
ート、第4図は第2図における分散応答用ベル決定手段
の動作を説明するためのフローチャート、第5図は第2
図における応答局線決定手段および分散応答用ベルの鳴
動停止手段の動作を説明するためのフローチャートであ
る。 1……交換回路、2……局線回路、3……内線回路、4
……内線電話機、5……制御装置、6……保守ターミナ
ル、7……記憶装置、8……分散応答用ベル、11……テ
ナント設定手段、12……分散応答用ベル決定手段、13…
…応答局線決定手段、14……分散応答用ベルの鳴動停止
手段、15……分散応答データテーブル。
FIG. 1 is a schematic configuration diagram of a private branch exchange according to an embodiment of the present invention, FIG. 2 is a functional block diagram showing a configuration of a portion related to a distributed response function in the embodiment, and FIG. 3 is a tenant determination in FIG. FIG. 4 is a flowchart for explaining the operation of the means, FIG. 4 is a flowchart for explaining the operation of the distributed response bell determining means in FIG. 2, and FIG.
It is a flowchart for demonstrating operation | movement of the response station line determination means in FIG. 1 ... Switching circuit, 2 ... Office line circuit, 3 ... Extension circuit, 4
… Extension telephone, 5… Control device, 6… Maintenance terminal, 7… Storage device, 8… Distributed response bell, 11… Tenant setting means, 12… Distributed response bell determination means, 13…
... response station line determination means, 14 means for stopping ringing of the distributed response bell, 15 ... distributed response data table.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】局線からの着信に対し予め定められた扱い
者が応答しない場合に当該着信を分散応答用ベルに表示
させ、この状態で内線が所定の分散応答入力操作を行な
った場合に当該内線を上記着信が到来した局線に接続し
て着信応答を可能とする分散応答機能を備えた機内交換
機であって、 分散応答時の局線からの着信を表示するための複数の分
散応答用ベルと、 これら複数の分散応答用ベルを、予め構成された複数の
局線テナントと、複数の内線テナントとに各々対応付け
て設定し、その対応関係を分散応答データテーブルに記
憶するためのテナント設定手段と、 局線からの着信に対し前記扱い者が応答しない場合に、
当該着信が到来した局線を含む局線テナントに対応する
分散応答用ベルを前記分散応答用データテーブルに記憶
された対応関係から決定し、この決定した分散応答用ベ
ルに着信表示を行なわせる分散応答用ベル決定手段と、 内線で分散応答入力操作が行なわれた場合に、当該内線
を含む内線テナントに対応する分散応答用ベルおよびこ
の分散応答用ベルに対応する局線テナントを、前記分散
応答データテーブルに記憶されている対応関係からそれ
ぞれ探索し、この探索結果に基づいて、前記分散応答入
力操作が行なわれた内線を含む内線テナントと前記着信
が到来している局線を含む局線テナントとが対応してい
るか否かを判定するための判定手段と、 この判定手段により対応していると判定された場合に前
記分散応答入力操作が行なわれた内線を前記着信が到来
している局線に接続し、一方対応していないと判定され
た場合には前記分散応答入力操作が行なわれた内線に対
し接続規制のための処理を行なう応答局線決定手段とを
具備したことを特徴とする構内交換機。
When a predetermined handler does not respond to an incoming call from a central office, the incoming call is displayed on a distributed response bell, and when the extension performs a predetermined distributed response input operation in this state. An internal exchange having a distributed response function for connecting the extension to the office line from which the incoming call has arrived and enabling an incoming call response, wherein a plurality of distributed responses for displaying an incoming call from the office line at the time of the distributed response. And a plurality of distributed response bells, respectively, are set in association with a plurality of pre-configured central office tenants and a plurality of extension tenants, and the correspondence is stored in the distributed response data table. If the tenant setting means does not respond to the incoming call from the office line,
A distributed response bell corresponding to the office line tenant including the office line from which the incoming call has arrived is determined from the correspondence stored in the distributed response data table, and the determined distribution response bell is used to display an incoming call. Response bell determination means, and when a distributed response input operation is performed on the extension, the distributed response bell corresponding to the extension tenant including the extension and the station line tenant corresponding to the distributed response bell are transmitted to the distributed response A search is made from each of the correspondences stored in the data table, and based on the search results, an extension tenant including the extension on which the distributed response input operation has been performed and a station tenant including the station line from which the incoming call has arrived And a determining means for determining whether or not they correspond to each other. When the determining means determines that they correspond to each other, the distributed response input operation is performed. A response station line that connects an extension to the station line from which the incoming call has arrived and, when it is determined that the extension is not supported, performs processing for connection restriction on the extension on which the distributed response input operation has been performed. A private branch exchange comprising: a decision unit.
JP62171432A 1987-07-09 1987-07-09 Private branch exchange Expired - Lifetime JP2659958B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62171432A JP2659958B2 (en) 1987-07-09 1987-07-09 Private branch exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62171432A JP2659958B2 (en) 1987-07-09 1987-07-09 Private branch exchange

Publications (2)

Publication Number Publication Date
JPS6416055A JPS6416055A (en) 1989-01-19
JP2659958B2 true JP2659958B2 (en) 1997-09-30

Family

ID=15923018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62171432A Expired - Lifetime JP2659958B2 (en) 1987-07-09 1987-07-09 Private branch exchange

Country Status (1)

Country Link
JP (1) JP2659958B2 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129689Y2 (en) * 1971-04-30 1976-07-27
JPS528053B2 (en) * 1972-04-28 1977-03-07
JPS5897951A (en) * 1981-12-07 1983-06-10 Nec Corp Automatic transferring method for b board incoming unanswered call
JPS6098749A (en) * 1983-11-04 1985-06-01 Nec Corp Called extension busy display system in individual incoming call
JPS60208193A (en) * 1984-03-30 1985-10-19 Fujitsu Ltd Tenant control system
JPS61281660A (en) * 1985-06-06 1986-12-12 Nec Corp Call pick-up system
JPS62131689A (en) * 1985-12-03 1987-06-13 Oki Electric Ind Co Ltd Trunk line incoming system

Also Published As

Publication number Publication date
JPS6416055A (en) 1989-01-19

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