JPH08293924A - Inter-station transfer system - Google Patents

Inter-station transfer system

Info

Publication number
JPH08293924A
JPH08293924A JP7098353A JP9835395A JPH08293924A JP H08293924 A JPH08293924 A JP H08293924A JP 7098353 A JP7098353 A JP 7098353A JP 9835395 A JP9835395 A JP 9835395A JP H08293924 A JPH08293924 A JP H08293924A
Authority
JP
Japan
Prior art keywords
station
terminal
transfer
call
message
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.)
Withdrawn
Application number
JP7098353A
Other languages
Japanese (ja)
Inventor
Masashi Nabeta
政志 鍋田
Takuma Okuno
拓真 奥野
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7098353A priority Critical patent/JPH08293924A/en
Publication of JPH08293924A publication Critical patent/JPH08293924A/en
Withdrawn legal-status Critical Current

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  • Telephonic Communication Services (AREA)

Abstract

PURPOSE: To efficiently and easily perform transfer among plural stations by sending out a call setting message on which another call number is given to a channel in use and connecting the terminal. CONSTITUTION: When the user of a terminal 15 requests inter-station transfer while talking with the talker of another station and the fact that the talker and a transfer opponent are housed in succeeding stations in the same route is identified by the inter-station transfer control part 12 of a central control unit 11, a transfer request part 120 sets channel identification on a channel used in speech with the talker on the succeeding station, and another new call number different from a call number used in the speech with the talker, and sends out by generating the call setting message. When the talker and the transfer opponent are housed in the succeeding station receiving the message, the talker hears a holding tone, and a line is connected to the transfer opponent, and when one of the talker and transfer opponent is housed in its own station and the other in the succeeding station, the talker in the station hears the holding tone, and the line is connected to the transfer opponent.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は異なる局の端末間の接続
中に一方の端末からの要求により通信相手との接続を別
の端末へ転送する局間転送方式に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-station transfer system for transferring a connection with a communication partner to another terminal according to a request from one terminal while connecting terminals of different stations.

【0002】近年の情報ネットワークにおける交換サー
ビスの高度化に伴い,ネットワークにまたがる交換サー
ビスの実現が強く要求されるようになってきた。その場
合,ネットワーク全体のリソースを有効に利用して,ユ
ーザの操作性を複雑にすることなく,ユーザの要求する
サービスを効率よく且つ確実に実現する要求が当然増大
してくる。そこで,そのような要求に簡単に且つ交換シ
ステムの性能を落とさずに対応していくことが必要とな
る。
With the advancement of exchange services in information networks in recent years, there has been a strong demand for realization of exchange services across networks. In that case, naturally, there is an increasing demand for effectively and surely realizing the service requested by the user without complicating the operability of the user by effectively using the resources of the entire network. Therefore, it is necessary to meet such demands easily and without degrading the performance of the exchange system.

【0003】[0003]

【従来の技術】従来の交換サービスでは,同一局内に収
容された2つの端末が通信中に,一方の端末からの要求
により通信相手の他方の端末を,別の端末へ転送する接
続をする局内転送が一般に行われている。しかし,局間
にまたがって接続する2つの端末の場合には,一方の局
の端末からの要求により相手端末との接続を,一方の端
末と異なる局の別の端末へ転送する場合,次に説明する
ように実行される。
2. Description of the Related Art In a conventional exchange service, when two terminals accommodated in the same station are communicating with each other, a request is made from one terminal to transfer the other terminal of the communication partner to another terminal. Transfers are commonplace. However, in the case of two terminals connected across stations, when the connection with the partner terminal is transferred to another terminal of a station different from one terminal by a request from the terminal of one station, Performed as described.

【0004】図15は従来例の説明図である。図15の
(1)は,局Aの電話機の端末aが実線で示す経路ab
を介して他の局Bの電話機の端末bと通話をしているも
のとする。なお,局Aと局B間に点線で示すような中継
局があってもよい。この状態で通話中に,端末aのユー
ザがこの接続を自局Aに収容されてない他の端末cへ転
送する必要が生じたものとする。図15の(2)に示す
ように,他の端末cが局Bに収容されている場合(局B
以外の局に収容されていてもよい),端末aのユーザは
局Aに対しフッキングを行って,転送を要求すると,現
在の通話相手である端末bを可聴信号源に接続し,端末
aからの転送先の端末cのダイヤル信号を受信する。
FIG. 15 is an explanatory view of a conventional example. In (1) of FIG. 15, the route ab indicated by the solid line by the terminal a of the telephone of the station A
It is assumed that a call is being made with the terminal b of the telephone of the other station B via the. There may be a relay station between the stations A and B as indicated by the dotted line. It is assumed that, during a call in this state, the user of the terminal a needs to transfer this connection to another terminal c not accommodated in the local station A. As shown in (2) of FIG. 15, when another terminal c is accommodated in the station B (station B
A user of terminal a hooks station A to request transfer, and connects terminal b, which is the other party of the current call, to an audible signal source. The dialing signal of the terminal c of the transfer destination of is received.

【0005】これにより,局Aは局Bへの中継線を捕捉
して局Bに番号を送信し,局Bで端末cを呼び出す。端
末cが応答すると,端末aと端末c間の経路acを介す
る接続が形成される。この後,端末aが切断を行うと,
局Aは先の端末aからの転送要求に対応する処理とし
て,図15の(3)に示すように,端末bに接続する経
路abと,端末cに接続する経路acとを折り返すよう
スイッチングを行い,端末bの接続を端末cへ転送接続
する。
As a result, the station A captures the relay line to the station B, transmits the number to the station B, and the station B calls the terminal c. When the terminal c responds, a connection is established via the path ac between the terminals a and c. After this, when terminal a disconnects,
As a process corresponding to the transfer request from the terminal a, the station A performs switching so as to return the path ab connected to the terminal b and the path ac connected to the terminal c as shown in (3) of FIG. Then, the connection of the terminal b is transferred and connected to the terminal c.

【0006】[0006]

【発明が解決しようとする課題】上記図15に示したよ
うに局間にわたる転送接続の場合,従来は転送要求を行
う端末aを収容する局Aにおいて,元の接続相手である
端末bと転送先の端末cの接続が行われる。そのため,
局間の中継線の経路ab,acの伝送路が端末bと端末
c間の通話が終了するまで専有されてしまい,中継用の
伝送路が無駄に利用されるという問題があった。また,
局間転送をISDNプロトコルをサポートするネットワ
ークの交換機において実行しようとしても基本的には同
様の問題が発生する。なぜならば,ISDNの標準勧告
では,ある呼に対して呼設定メッセージ(SETUP)
を生成することができない。すなわち,ある呼があるチ
ャネルを使用していると,その呼すなわちそのチャネル
に対して呼設定メッセージを送出することはできない。
従って,発信側で使用中のチャネルに別の呼番号を割り
当てた呼設定メッセージを生成することはなく,また呼
設定メッセージが着信した局において,呼設定メッセー
ジの指定チャネルが使用中で別の番号が既に割り当てら
れていれば,異常メッセージとみなされていた。しか
し,私設網においては,上記メッセージを生成,処理す
ることは可能である。
In the case of a transfer connection between stations as shown in FIG. 15 above, conventionally, in the station A accommodating the terminal a which makes a transfer request, the transfer is made with the terminal b which is the original connection partner. The terminal c is connected. for that reason,
There is a problem that the transmission lines of the routes ab and ac of the relay lines between the stations are monopolized until the call between the terminals b and c is completed, and the transmission line for the relay is wastefully used. Also,
A similar problem basically occurs even if an attempt is made to perform inter-station transfer in a switch of a network that supports the ISDN protocol. This is because the ISDN standard recommendation indicates that a call setup message (SETUP) for a call.
Cannot be generated. That is, if a call uses a certain channel, a call setup message cannot be sent to the call, that is, the channel.
Therefore, the caller does not generate a call setup message in which another call number is assigned to the channel being used on the caller side, and the designated channel of the call setup message is in use at another station at the station receiving the call setup message. If was already assigned, it was considered an abnormal message. However, in a private network, it is possible to generate and process the above message.

【0007】本発明はISDNプロトコルをサポートす
る交換機で構成されるネットワークにおいて通話中のユ
ーザからネットワーク内の複数の局にまたがる転送を通
信回線を効率良く使用して,且つ交換機の性能に影響を
与えないで簡単に実現することを目的とする。
The present invention efficiently uses a communication line for transfer from a user in a call to a plurality of stations in the network in a network constituted by an exchange supporting the ISDN protocol and affects the performance of the exchange. The purpose is to realize easily without.

【0008】[0008]

【課題を解決するための手段】図1は本発明によるネッ
トワークを構成する交換機の基本構成図,図2は本発明
による局間転送の各転送準備の各接続形態の例を示す図
である。
FIG. 1 is a basic configuration diagram of an exchange forming a network according to the present invention, and FIG. 2 is a diagram showing an example of each connection form for each transfer preparation for inter-station transfer according to the present invention.

【0009】図1において,1はISDNプロトコルを
サポートする交換機,10は通話路,11は中央制御装
置,12は中央制御装置11内に設けられた局間転送の
制御を行う局間転送制御部,13は中央制御装置11内
でISDNプロトコルによる通信制御を行うISDNプ
ロトコル通信制御部,14は記憶装置,15は端末,1
6は他の局と接続する各中継線に接続されたISDNト
ランクである。
In FIG. 1, 1 is an exchange supporting the ISDN protocol, 10 is a communication path, 11 is a central control unit, and 12 is an inter-station transfer control unit for controlling inter-station transfer provided in the central control unit 11. , 13 is an ISDN protocol communication control unit for controlling communication by the ISDN protocol in the central controller 11, 14 is a storage device, 15 is a terminal, 1
Reference numeral 6 is an ISDN trunk connected to each trunk line connected to another station.

【0010】局間転送制御部12内の,転送要求部12
0は他局の既通話者の端末と通話中の端末からの転送要
求を受け取ると他局に対し転送要求を発生する処理を行
い,転送準備部121は既通話端末及び転送先相手端末
が収容される局の関係に対応した各種パターンの転送準
備を行い,メッセージ分析部122はSETUP,DI
SC,FAC等の各メッセージの分析を行い,メッセー
ジ中継処理部123は各メッセージの中継処理を行い,
転送部124は転送要求端末からの要求により転送先端
末を切断して,既通話端末と転送先相手端末を接続する
処理を行い,接続切替部125は転送要求端末からの切
替の要求により,要求端末と接続される相手を転送先端
末か,既通話端末に切替えて,他方の端末に保留音を聴
取させる処理を行う。
The transfer request unit 12 in the inter-station transfer control unit 12
0 performs a process of generating a transfer request to another station when a transfer request is received from the terminal of the callee of the other station and the terminal in communication, and the transfer preparation unit 121 accommodates the callee terminal and the transfer destination terminal. The message analysis unit 122 prepares for transfer of various patterns corresponding to the relationship of the stations to be set, and the message analysis unit 122 sets SETUP, DI.
The messages such as SC and FAC are analyzed, and the message relay processing unit 123 performs the relay processing of each message.
The transfer unit 124 disconnects the transfer destination terminal in response to the request from the transfer request terminal and performs processing for connecting the already-call terminal and the transfer destination partner terminal, and the connection switching unit 125 performs the request in response to the switching request from the transfer request terminal. The other party connected to the terminal is switched to the transfer destination terminal or the already called terminal, and the other terminal listens to the hold tone.

【0011】本発明はネットワークを構成する交換機に
おいて,ユーザが通話中に局間の転送を要求すると,既
通話者と転送先相手が同じ方路の後位に収容されている
と既通話者との接続で使用しているチャネルを指定し,
呼番号を既通話者との接続とは別の番号を指定した呼設
定メッセージを,後位局に対し送信し,そのメッセージ
を受けた後位局において既通話者と転送先相手が自局に
収容されていると,既通話者に保留音を聴取させ,転送
先相手を接続し,後位局において既通話者または転送先
相手の一方が自局で他方がさらに後位局である場合はそ
の局において既通話者に保留音を聴取させ,転送先相手
を接続するものである。
According to the present invention, in a switch forming a network, when a user requests a transfer between stations during a call, it is determined that the called party and the transfer destination party are accommodated behind the same route. Specify the channel used in the connection of
A call setup message that specifies a call number different from the connection with the already called party is sent to the succeeding station, and the already called party and the transfer destination party are sent to the own station at the succeeding station receiving the message. If it is accommodated, the already called party listens to the hold tone, connects the transfer destination party, and if one of the already called party or the transfer destination party is the own station and the other is the subsequent station in the subordinate station, At the station, the caller who has already called listens to the held tone and connects the transfer destination.

【0012】[0012]

【作用】図2に局間転送の各転送準備のパターンが示さ
れ,(1) は,局Xに一方の端末aが収容され,他の局Y
に端末aと通信中の相手(既通話者という)の端末bが
収容されている場合に,端末aの操作者が局Yの端末c
を転送先相手として要求を行った場合の転送準備1のパ
ターンである。図2の(2) は,既通話者の端末bが局Y
に収容されている時,端末aの操作者が転送先相手の端
末cとして,局Yの後位局である局Zに収容されている
転送準備2のパターンである。図2の(3)は,転送先相
手の端末cが局Xと局Yの中間にある局Zに収容されて
いる転送準備3のパターンであり,図2の(4) は転送先
相手の端末c が操作者の端末aを収容する局Xと既通話
者の端末bを収容する局Yの中間に配置された局Wと中
継線により接続された局Zに収容されている転送準備4
のパターンである。これらの各パターンの状態は転送を
行う前の準備段階であり,端末aの操作により転送が実
行されると端末aが切断され,端末bと端末cが接続
(転送)される。
FIG. 2 shows each transfer preparation pattern for inter-station transfer. In (1), one terminal a is accommodated in the station X and the other station Y is accommodated.
When the terminal b of the other party (called a caller) who is communicating with the terminal a is accommodated in the terminal a, the operator of the terminal a determines the terminal c of the station Y.
This is a pattern of transfer preparation 1 when a request is made with the transfer destination as a destination. In (2) of FIG. 2, the terminal b of the already called party is station Y.
2 is a pattern of the transfer preparation 2 in which the operator of the terminal a is accommodated in the station Z, which is the succeeding station of the station Y, as the terminal c of the transfer destination. (3) of FIG. 2 is a pattern of the transfer preparation 3 in which the terminal c of the transfer destination is accommodated in the station Z which is between the station X and the station Y, and (4) of FIG. Transfer preparation 4 accommodated in a station W in which a terminal c is connected between a station W accommodating an operator's terminal a and a station Y accommodating an already-called person's terminal b and a station Z connected by a trunk line 4
Pattern. The state of each of these patterns is a preparatory stage before transfer. When the transfer is executed by the operation of the terminal a, the terminal a is disconnected and the terminals b and c are connected (transferred).

【0013】上記のような各接続形態の局間転送を行う
ため,各局X,局Y,局Z,局Wは図1の構成を備えた
交換機が設けられている。端末15のユーザが他局の既
通話者と通話中に,局間転送を要求すると,中央制御装
置11の局間転送制御部12で既通話者と転送先相手が
同じ方路の後位局に収容されていることを識別すると,
転送要求部120は後位局に対しチャネル識別を既通話
者との通話で使用しているチャネル,呼番号を既通話者
との通話で使用している呼番号と異なる別の新しい呼番
号に設定し,発番号を操作者の端末(端末a)の番号,
着番号を転送先相手の端末(端末c)の番号とする情報
要素とした呼設定メッセージ(起呼した時に送出される
メッセージで,以下SETUPという)を作成し,IS
DNプロトコル通信制御部13の制御により送出する。
このSETUPを受信した局では,メッセージ分析部1
22で分析する。ここで,局間転送の呼接続であること
は,既通話者との通話で使用しているチャネル番号を検
出することにより識別する(または,情報要素の中の局
間転送を表示する)。転送先相手が自局収容か否かはS
ETUP内の着番号により識別する。
In order to perform the inter-station transfer of each connection form as described above, each station X, station Y, station Z, and station W is provided with an exchange having the configuration of FIG. When the user of the terminal 15 requests an inter-station transfer during a call with an already called party of another station, the inter-office transfer control unit 12 of the central control unit 11 causes the called party and the destination party to be the next station in the same route. Identified as being contained in
The transfer requesting unit 120 sends a channel identification to the succeeding station to a channel used in a call with the already called party and a call number to another new call number different from the call number used in the call with the already called party. Set the calling number and the number of the operator's terminal (terminal a),
Create a call setup message (a message that is sent when a call is made, hereinafter referred to as SETUP) that uses the called number as the information element of the transfer destination terminal (terminal c).
It is transmitted under the control of the DN protocol communication control unit 13.
In the station that received this SETUP, the message analysis unit 1
Analyze at 22. Here, the call connection for inter-station transfer is identified by detecting the channel number used in the call with the existing caller (or the inter-station transfer in the information element is displayed). Whether the transfer destination is the own station accommodation is S
It is identified by the called number in ETUP.

【0014】転送先が後位局の場合はメッセージ中継処
理部123で,受信したSETUPの一部をそのまま使
用したSETUPを作成し,ISDNプロトコル通信制
御部13から後位局へ送出する。転送準備部121は,
上記図2の各パターンに対応して,既通話者の端末bに
対し保留音を聴取させ,転送先を接続する等の転送準備
を行う。操作者の端末aと転送先の端末cが接続された
時,操作者の端末aで切断を行うと,切断メッセージ
(呼が切断された時に送出されるメッセージで,以下,
DISCという)が後位局へ送出される。
When the transfer destination is the subsequent station, the message relay processing unit 123 creates a SETUP that uses a part of the received SETUP as it is, and sends it from the ISDN protocol communication control unit 13 to the subsequent station. The transfer preparation unit 121
Corresponding to each pattern of FIG. 2 above, the terminal b of the already called party is made to listen to the holding tone, and the transfer preparation such as connecting the transfer destination is performed. When the operator's terminal a and the transfer destination terminal c are connected, if the operator's terminal a disconnects, a disconnection message (a message sent when the call is disconnected.
DISC) is sent to the succeeding station.

【0015】DISCを受信した後位局では,メッセー
ジ分析部122のDISC部122bで分析し,転送部
124によりDISCの呼番号の呼情報を解放し,転送
先相手の呼番号で既通話者と転送先相手とを通話状態に
する。メッセージ中継処理部123は,DISCの呼番
号を引き継いだ局にDISCを中継する。
In the subordinate station that receives the DISC, the DISC section 122b of the message analysis section 122 analyzes it, the transfer section 124 releases the call information of the DISC call number, and the call number of the transfer destination party is used to identify the called party. Place the call with the transfer destination. The message relay processing unit 123 relays the DISC to the station that has inherited the DISC call number.

【0016】また,転送準備後に,端末aから接続切替
を要求すると,端末aの交換機から接続切替と両方(端
末b及び端末c)の呼番号等を情報要素とする付加サー
ビスメッセージ(サービスを制御するためのメッセー
ジ)でファシリティメッセージ(以下,FACという)
を送出する。FACを受信した局では,メッセージ分析
部122のFAC部122cで分析し,保留音を送出し
ている端末を端末aと通話状態にして,通話していた端
末に保留音を送出する。
Further, when the connection switching is requested from the terminal a after the transfer preparation, an additional service message (controlling the service) having the connection switching from the exchange of the terminal a and the call numbers of both (the terminals b and c) as information elements Facility message (hereinafter referred to as FAC)
Is sent. At the station that has received the FAC, the FAC unit 122c of the message analysis unit 122 analyzes it, puts the terminal that is sending the hold tone in a call state with the terminal a, and sends the hold tone to the terminal that was talking.

【0017】[0017]

【実施例】図3,図4は転送準備1の実施例1の処理フ
ロー(その1),(その2)であり,図5は転送準備1
の接続シーケンスである。
[Embodiment] FIGS. 3 and 4 are process flows (No. 1) and (No. 2) of Embodiment 1 of transfer preparation 1, and FIG. 5 is transfer preparation 1
Is a connection sequence of.

【0018】この転送準備1は,上記図2の(1) の転送
形態の場合における動作であり,局Xの交換機の端末番
号aaaの端末aと局Yの交換機の端末番号がbbbの
端末bが通信中に端末aから局Yの端末番号cccの端
末cへの転送要求が発生した場合を例として説明する。
この場合,局Xと局Yの通話チャネルをB1,端末aと
端末bの通話呼番号をCRaとする。
This transfer preparation 1 is an operation in the case of the transfer mode of (1) in FIG. 2 described above. The terminal a having the terminal number aaa of the exchange of the station X and the terminal b having the terminal number bbb of the exchange of the station Y are the same. A case where a transfer request from the terminal a to the terminal c having the terminal number ccc of the station Y occurs during communication will be described as an example.
In this case, the call channel of the stations X and Y is B1, and the call number of the terminals a and b is CRa.

【0019】図3において,局Xにおいて,転送要求が
発生すると(図3のS1),既通話者(端末bの通話
者)と転送先相手が同じ方路か判定し(同S2),同じ
でない場合は既存処理を行い(同S4),同じ方路の場
合は呼設定メッセージ(SETUPという)を送出する
(同S3)。このSETUPの構成を図5に示す。
In FIG. 3, when a transfer request is generated in the station X (S1 in FIG. 3), it is judged whether the already called party (caller of the terminal b) and the transfer destination are the same route (S2), and the same. If not, the existing process is performed (at step S4), and if the route is the same, a call setup message (called SETUP) is sent out (at step S3). The structure of this SETUP is shown in FIG.

【0020】図5には局Xの端末aと局Yの端末bとが
最初に接続されるシーケンスを最初のa〜dに示し,最
初に端末aからSETUPを構成する情報要素中に,現
在の端末aと端末bの通話呼番号CRa,通話チャネル
B1,端末番号aaa,bbb,等を設定して局Yに送
信し,局Yから呼設定受付を表すCALLPROCメッ
セージを応答し,端末bの呼出し状態を表すALERT
メッセージ,及び端末bによる応答(接続)を表すCO
NNメッセージが局Xに返されて通話状態に移行する。
FIG. 5 shows the sequence a to d in which the terminal a of the station X and the terminal b of the station Y are first connected. First, in the information elements constituting the SETUP from the terminal a, the present The call call number CRa, call channel B1, terminal numbers aaa, bbb, etc. of the terminals a and b of the terminal a and b, and the like are transmitted to the station Y, and the station Y responds with a CALLPROC message indicating acceptance of the call setting. ALERT indicating the calling state
CO representing a message and a response (connection) by the terminal b
The NN message is returned to the station X and the call state is entered.

【0021】この後,局Xの端末aから,転送要求を表
すSETUPが送出される(図3のS5)。このSET
UPには,図5のeに示すように,呼番号が既通話呼の
呼番号と異なるCRb,通話チャネルは既通話呼と同じ
B1,発信側の端末番号aaa,転送先相手の端末番号
ccc等が含まれる。
Thereafter, the terminal a of the station X sends SETUP indicating a transfer request (S5 in FIG. 3). This SET
As shown in e of FIG. 5, the UP has CRb whose call number is different from the call number of the already called call, the call channel is the same as the already called call B1, the terminal number aaa of the calling side, and the terminal number ccc of the transfer destination. Etc. are included.

【0022】局YでこのSETUPメッセージが受信さ
れると(図3のS6),チャネルが使用中か判別され
(同S7),使用中でない場合は既存処理が行われ(同
S8),既通話呼により使用中の場合はチャネルの呼番
号とメッセージ呼番号が異なるか判別し(同S9),同
じ場合も既存処理を行い,異なる場合はチャネルの呼を
中継しているか判別する(同S10)。中継の場合は別
の転送準備の処理(後述する転送準備3の処理)が行わ
れ,中継でない場合,相手は自局収容端末か判別する
(同S11)。転送先相手の端末cは自局収容であり,
転送準備1に移行する(同S12)。なお,転送先相手
端末が自局収容でない場合は,後述する転送準備2に移
行する(同S13)。
When this SETUP message is received by the station Y (S6 in FIG. 3), it is determined whether the channel is in use (S7 in the same figure). If it is not in use, the existing process is performed (S8 in the same figure), and the existing call is made. When the call is being used by a call, it is determined whether the call number of the channel and the message call number are different (at the same step S9). If the same, the existing process is performed. If different, it is determined whether the call of the channel is relayed (at the same step S10). . In the case of relay, another transfer preparation process (process of transfer preparation 3 described later) is performed, and in the case of non-relay, it is determined whether the partner is the terminal accommodated by the own station (at step S11). The terminal c of the transfer destination is the own station,
The process shifts to transfer preparation 1 (at step S12). If the destination terminal of the transfer destination is not accommodated by the own terminal, the process proceeds to transfer preparation 2 described later (at step S13).

【0023】転送準備1の処理は図4に示され,最初に
既通話者の端末bに自局の保留音を接続して端末bに保
留音を聴取させる(図4のS1)。次に転送先相手の端
末cを発信側の端末aと接続する(同S2)。この接続
シーケンスは,図5のe〜hに示される各メッセージの
やりとりにより行われる。この状態では,端末aと端末
cの利用者の間で通話が行われ,端末bは保留音を聞い
ている状態となる。
The process of the transfer preparation 1 is shown in FIG. 4, and first, the holding sound of the own station is connected to the terminal b of the already called party and the terminal b listens to the holding sound (S1 in FIG. 4). Next, the terminal c of the transfer destination is connected to the terminal a of the calling side (at step S2). This connection sequence is performed by exchanging the messages shown in e to h of FIG. In this state, a call is made between the users of the terminals a and c, and the terminal b is in a state of listening to the hold tone.

【0024】また,図4,図5に示されないが,上記図
1について説明したように,この状態で,端末aからフ
ッキング等により切替要求を発生すると,端末aを収容
するXの交換機は,接続切替の表示と両方の呼番号
(端末aと既通話端末bとの呼番号及び端末aと既通話
端末cとの呼番号)等を情報要素とした付加サービスメ
ッセージ(ファシリティメッセージ:FAC)を送出す
る。このFACを受信した局では,このメッセージを分
析することにより,接続切替を行い,保留音を聴取して
いる端末bを端末aと接続して通話状態にし,通話して
いた端末cに保留音を聴取させる。この状態は,端末a
からの接続切替を行う毎に,交互に切替えられる。
Although not shown in FIGS. 4 and 5, as described above with reference to FIG. 1, when a switching request is issued from the terminal a by hooking or the like in this state, the exchange of the station X accommodating the terminal a is , An additional service message (facility message: FAC) having information elements such as connection switching display and both call numbers (call numbers of terminal a and already called terminal b and call numbers of terminal a and already called terminal c) Is sent. The station receiving this FAC analyzes the message to switch the connection, connect the terminal b that is listening to the hold tone with the terminal a to put it in a call state, and put the hold tone on the terminal c that was talking. To listen to. In this state, terminal a
The connection is switched every time the connection is switched from.

【0025】一方,上記図5のhの状態で,図5のiに
示すように端末aから切断を要求するDISCメッセー
ジを送信すると,局Xから局Yへ送出される。図4の局
Yにおいて,DISCを受信すると(図4のS3),指
定呼番号の使用しているチャネルに対して別の呼番号が
あるか判別し(同S4),別の呼番号が無い場合は既存
処理を行うが(同S5),別の呼番号があると指定呼番
号の通話者の端末が自局にあるか判別する(同S6)。
自局にない場合は他の転送準備に移行するが,この場合
は端末bと端末cが自局にあるので転送動作を行う(同
S7)。この転送動作により,端末cが端末bと接続さ
れ,端末aは解放され,図5のjに示すように解放を表
すRELメッセージが局Yから局Xに送出される。
On the other hand, in the state of h in FIG. 5, when a DISC message requesting disconnection is transmitted from the terminal a as shown in i of FIG. 5, it is transmitted from the station X to the station Y. When the station Y in FIG. 4 receives the DISC (S3 in FIG. 4), it determines whether there is another call number for the channel used by the designated call number (S4 in the same figure), and there is no other call number. In this case, the existing process is performed (at step S5), but if there is another call number, it is determined whether the terminal of the caller having the designated call number is at the local station (at step S6).
If it is not in its own station, it shifts to another transfer preparation, but in this case, since the terminals b and c are in its own station, the transfer operation is performed (at step S7). By this transfer operation, the terminal c is connected to the terminal b, the terminal a is released, and the REL message indicating the release is sent from the station Y to the station X as shown at j in FIG.

【0026】次に図6,図7は転送準備2の実施例の処
理フロー(その1),(その2)であり,図8は転送準
備2の接続シーケンスである。この転送準備2は,上記
図2の(2) の転送形態の場合における動作であり,局X
の交換機に収容の端末番号aaaの端末aと局Yの交換
機に収容の端末番号がbbbの端末bが通信中に端末a
から局Yの後位に位置する局Zの交換機に収容の端末c
(端末番号ccc)への転送要求が発生した場合を例と
して説明する。この場合,局Xと局Yの通話チャネルを
B1,端末aと端末bの通話呼番号をCRaとし,局X
と局Yの新しい(転送用)呼番号をCRb,局Yと局Z
間の呼番号をCRc,通話チャネルをB2とする。
Next, FIGS. 6 and 7 are process flows (No. 1) and (No. 2) of the embodiment of transfer preparation 2, and FIG. 8 is a connection sequence of transfer preparation 2. This transfer preparation 2 is an operation in the case of the transfer mode of (2) in FIG.
Terminal a with the terminal number aaa accommodated in the exchange and the terminal b with the terminal number bbb accommodated in the exchange of station Y are communicating with each other.
From terminal c accommodated in the exchange of station Z located behind station Y
A case where a transfer request to (terminal number ccc) occurs will be described as an example. In this case, the call channel of the stations X and Y is B1, the call number of the terminals a and b is CRa, and the station X is
And the new (transfer) call number of station Y to CRb, station Y and station Z
The call number between them is CRc and the communication channel is B2.

【0027】図6において,局Xにおいて,転送要求が
発生すると(図6のS1),既通話者(端末bの通話
者)と転送先相手が同じ方路か判定し(同S2),同じ
でない場合は既存処理を行い(同S4),同じ方路の場
合は呼設定メッセージ(SETUPという)を送出する
(同S3)。ここで,図8により接続シーケンスを説明
する。
In FIG. 6, when a transfer request is generated in the station X (S1 in FIG. 6), it is determined whether the already called party (caller of the terminal b) and the transfer destination are the same route (S2), and the same. If not, the existing process is performed (at step S4), and if the route is the same, a call setup message (called SETUP) is sent out (at step S3). Here, the connection sequence will be described with reference to FIG.

【0028】図8には上記図5と同様に局Xの端末aと
局Yの端末bとが最初に接続されるシーケンスがa〜d
として示されている。この後,端末aと端末bが通話中
の状態で,局Xの端末aから,転送要求を表すSETU
Pが送出される(図6のS5)。このSETUPは,上
記図5のeと同じ内容である。
In FIG. 8, the sequence in which the terminal a of the station X and the terminal b of the station Y are first connected as in FIG. 5 is a to d.
As shown. After that, the terminal a of the station X sends a SETU indicating a transfer request while the terminals a and b are busy.
P is sent (S5 in FIG. 6). This SETUP has the same contents as the above e of FIG.

【0029】局YでこのSETUPメッセージが受信さ
れると(図6のS6),上記図3と同様にS7〜S10
の処理が行われ,ステップS11において相手は自局収
容端末であるかを判別すると,この場合は上記図2の接
続形態の例であるから自局収容ではないと判別され,転
送準備2に移行する。
When the station Y receives the SETUP message (S6 in FIG. 6), S7 to S10 are performed as in the case of FIG.
When it is determined in step S11 whether the other party is the terminal accommodated by the own station, it is determined that the terminal is not accommodated by the own station in this case because it is the example of the connection form of FIG. To do.

【0030】転送準備2の処理は図7に示され,最初に
既通話者の端末bに自局(Y局)の保留音を接続して端
末bに保留音を聴取させる(図7のS1)。次に転送先
相手を接続する(同S2)。
The process of transfer preparation 2 is shown in FIG. 7, in which the hold tone of the own station (Y station) is first connected to the terminal b of the already called party and the hold tone is heard by the terminal b (S1 in FIG. 7). ). Next, the transfer destination is connected (at step S2).

【0031】この場合,図8のfに示すように,局Yで
は転送先相手の端末cを宛先とするSETUPを作成し
て局Zへ送出する。この場合,呼番号及びチャネルは新
たにCRc,B2が設定され,発信元の端末番号aaa
と宛先端末番号cccは局Yが受信したSETUPの番
号が使用される。このSETUPが局Zで受信され,C
ALLPROCメッセージが発生し,続いて端末ccc
の呼出しによりALERTメッセージ,更に端末ccc
の応答によりCONNメッセージが発生すると,局Y及
び局Xへ送信され(図8のg〜i),局Xの端末aと局
Zの端末cとが接続される。この状態では,端末aと端
末cの利用者の間で通話が行われ,端末bは局Yからの
保留音を聞いている状態となる。
In this case, as shown at f in FIG. 8, the station Y creates a SETUP destined for the transfer destination terminal c and sends it to the station Z. In this case, CRc and B2 are newly set as the call number and the channel, and the source terminal number aaa is set.
As the destination terminal number ccc, the SETUP number received by the station Y is used. This SETUP is received by station Z, and C
An ALLPROC message is generated, followed by the terminal ccc
Call ALERT message, then terminal ccc
When a CONN message is generated in response to the above, it is transmitted to the stations Y and X (g to i in FIG. 8), and the terminal a of the station X and the terminal c of the station Z are connected. In this state, a call is made between the users of the terminals a and c, and the terminal b is in a state of listening to the hold tone from the station Y.

【0032】この時,端末aから接続切替の要求が発生
すると,図7,図8には示されないが,上記転送準備1
について説明したのと同様に,付加サービスメッセージ
(FAC)が局Xから送出され,保留音を送出する局Y
において受信されることにより端末aと通話状態の端末
が切替えられる。
At this time, when a connection switching request is issued from the terminal a, although not shown in FIG. 7 and FIG.
In the same manner as described above, the station Y that sends the supplementary service message (FAC) from the station X and sends the hold tone.
The terminal a in communication with the terminal a is switched by being received at.

【0033】また,図8のiの状態で,図8のjに示す
ように端末aから切断を要求するDISCメッセージ
(呼番号として転送先の端末cの接続に使用したCRb
を指定)を送信すると,局Xから局Yへ送出される。図
7に示すフローにより局YでDISCを受信すると(図
7のS3),指定呼番号(CRb)の使用しているチャ
ネルに対して別の呼番号があるか判別し(同S4),別
の呼番号が無いと既存処理を行うが(同S5),別の呼
番号があると指定呼番号の通話者の端末が自局にあるか
判別する(同S6)。この時,自局にないことが分かる
と,次に同チャネルの別の呼番号の呼の通話者の端末が
自局にあるか判別し(同S7),ある場合は転送が行わ
れ(同S8),ない場合は後述する処理(転送準備4の
処理)が行われる。
Further, in the state of i of FIG. 8, as shown in j of FIG. 8, a DISC message requesting disconnection from the terminal a (CRb used to connect the transfer destination terminal c as a call number)
Is transmitted), the data is transmitted from the station X to the station Y. When DISC is received by the station Y according to the flow shown in FIG. 7 (S3 in FIG. 7), it is determined whether or not there is another call number for the channel used by the designated call number (CRb) (S4 in the same). If there is no call number, the existing process is performed (S5 in the same step), but if there is another call number, it is determined whether or not the terminal of the caller having the designated call number is in its own station (S6). At this time, if it is found that it is not in the local station, it is then determined whether or not the terminal of the caller of another call number of the same channel is in the local station (S7), and if there is, transfer is performed (Same). S8), and if not, the process (process of transfer preparation 4) described later is performed.

【0034】図8の例で言えば,図7のステップS4〜
S7において,指定呼番号CRbが使用しているチャネ
ルB1に対して別の呼番号CRaがあると判断され,指
定呼番号CRbの呼の通話者(端末cの通話者)がY局
にあるか判断して,Y局にないため次にB1チャネルの
別の呼番号CRaの呼の通話者(端末b)が自局(Y
局)にあるか判別し,Y局にあるため,ステップS8の
転送動作が行われる。
In the example of FIG. 8, steps S4 through S4 of FIG.
In S7, it is determined that there is another call number CRa for the channel B1 used by the designated call number CRb, and whether the caller of the call of the designated call number CRb (the caller of the terminal c) is in the Y station. Judging that the caller (terminal b) of the call with another call number CRa on the B1 channel does not exist in the station Y because it is not in the station Y
Station), and because it is in the Y station, the transfer operation in step S8 is performed.

【0035】この転送動作により,局Xの端末aと局Y
の端末bの接続が解放され,局Yの端末bと局Zの端末
cが接続され,図8のkに示すように解放を表すREL
メッセージが局Yから局Xに送出される。
By this transfer operation, station a of station X and station Y
The connection of the terminal b of the terminal is released, the terminal b of the station Y and the terminal c of the station Z are connected, and REL indicating the release is shown as indicated by k in FIG.
A message is sent from station Y to station X.

【0036】次に図9,図10は転送準備3の実施例の
処理フロー(その1),(その2)であり,図11は転
送準備3の接続シーケンスである。この転送準備3は,
上記図2の(3) の転送形態の場合における動作であり,
局Xの交換機に収容の端末番号aaaの端末aと局Yの
交換機に収容の端末番号がbbbの端末bが通信中に,
端末aから局Xと局Yの中間に位置する局Zの交換機に
収容の端末c(端末番号ccc)への転送要求が発生し
た場合を例として説明する。
Next, FIGS. 9 and 10 are process flows (No. 1) and (No. 2) of the embodiment of transfer preparation 3, and FIG. 11 is a connection sequence of transfer preparation 3. This transfer preparation 3
This is the operation in the case of the transfer form of (3) in FIG.
While the terminal a of the terminal number aaa accommodated in the exchange of the station X and the terminal b of the terminal number bbb accommodated in the exchange of the station Y are communicating,
An example will be described in which a transfer request from the terminal a to the terminal c (terminal number ccc) accommodated in the exchange of the station Z, which is located between the stations X and Y, is generated.

【0037】この場合,局Xと局Zの通話チャネルをB
1,通話呼番号をCRa,局Zと局Yの通話チャネルを
B2,通話呼番号をCRb,局Xと局Z間の転送要求の
新しい呼番号をCRcとする。
In this case, the communication channel between the stations X and Z is set to B.
1, a call call number is CRa, a call channel between stations Z and Y is B2, a call call number is CRb, and a new call number for a transfer request between stations X and Z is CRc.

【0038】図9において,局Xにおいて,転送要求が
発生すると(図9のS1),既通話者(端末bの通話
者)と転送先相手が同じ方路か判定し(同S2),同じ
でない場合は既存処理を行い(同S4),同じ方路の場
合は呼設定メッセージ(SETUPという)を送出する
(同S3)。ここで,図11により接続シーケンスを説
明する。
In FIG. 9, when a transfer request is generated in the station X (S1 in FIG. 9), it is judged whether the already called party (caller of the terminal b) and the transfer destination are the same route (S2), and the same. If not, the existing process is performed (at step S4), and if the route is the same, a call setup message (called SETUP) is sent out (at step S3). Here, the connection sequence will be described with reference to FIG.

【0039】図11には局Xの端末aと局Yの端末bと
が最初に接続されるシーケンスがa〜eとして示されて
いる。この場合,局Xから送出されたSETUP(図1
1のa)が,中継を行う局Zにおいて,再設定され,呼
番号,チャネル番号が変更されて局Yに送出され(図1
1のb),c〜eで示す各メッセージが局Y,局Z,局
Xへ送信されて,端末aと端末bとが接続される。その
後,端末aと端末bが通話中の状態で,局Xの端末aか
ら,転送要求を表すSETUPが送出される(図9のS
5)。このSETUPは,上記図11のfに示すよう
に,既通話呼の呼番号と異なる呼番号CRcで,同じチ
ャネル番号B1である。
In FIG. 11, a sequence in which the terminal a of the station X and the terminal b of the station Y are first connected is shown as a to e. In this case, the SETUP (Fig. 1
1a) is reset in the relay station Z, the call number and the channel number are changed, and sent to the station Y (see FIG. 1).
Each of the messages b) and c to e of 1 is transmitted to the station Y, the station Z, and the station X, so that the terminal a and the terminal b are connected. After that, in a state where the terminal a and the terminal b are in a call, the terminal a of the station X sends SETUP indicating a transfer request (S in FIG. 9).
5). This SETUP is a call number CRc different from the call number of the already called call and the same channel number B1 as shown in FIG.

【0040】局ZでこのSETUPメッセージが受信さ
れると(図9のS6),上記図6と同様にS7〜S9の
処理が行われ,次のステップS10においてチャネルの
呼を中継しているかが判別される。図11の例では,転
送要求のSETUPメッセージの呼番号CRcがチャネ
ルB1の呼番号CRaと異なり,そのチャネルB1の呼
を局Zから局Yへ中継しているため,中継していること
が分かる。次に,転送先相手は自局収容端末か判別する
(図9のS11)。この場合,転送先(端末c)はこの
局Zに収容されているので,転送準備3に移行する。
When this SETUP message is received by the station Z (S6 in FIG. 9), the processes in S7 to S9 are performed in the same manner as in FIG. 6 above, and in the next step S10, it is determined whether the channel call is relayed. To be determined. In the example of FIG. 11, the call number CRc of the SETUP message of the transfer request is different from the call number CRa of the channel B1, and the call of the channel B1 is relayed from the station Z to the station Y. . Next, it is determined whether the transfer destination is the terminal accommodated in the own station (S11 in FIG. 9). In this case, since the transfer destination (terminal c) is accommodated in this station Z, the process proceeds to transfer preparation 3.

【0041】転送準備3の処理は図10に示され,最初
に既通話者の局Yの端末bに自局(Z局)の保留音を接
続して端末bに保留音を聴取させる(図10のS1)。
次に転送先相手を接続する(同S2)。
The process of the transfer preparation 3 is shown in FIG. 10. First, the terminal b of the station Y of the already called party is connected to the hold sound of its own station (station Z) and the terminal b is made to hear the hold sound (FIG. 10 S1).
Next, the transfer destination is connected (at step S2).

【0042】この場合,図11のg〜iに示すように,
局Zでは転送先相手の端末cを接続するためCALLP
ROCメッセージ,呼出しによりALERTメッセー
ジ,更に端末cの応答によりCONNメッセージが発生
し,局Xへ送信される。こうして,局Xの端末aと局Z
の端末cとが接続される。この状態では,端末aと端末
cの利用者の間で通話が行われ,端末bは局Zからの保
留音を聞いている状態となる。
In this case, as shown in g to i of FIG.
At station Z, CALLP is used to connect the transfer destination terminal c.
A ROC message, an ALERT message by calling, and a CONN message by a response from the terminal c are generated and transmitted to the station X. Thus, terminal a of station X and station Z
Is connected to the terminal c. In this state, a call is made between the users of the terminal a and the terminal c, and the terminal b is in a state of listening to the hold tone from the station Z.

【0043】この状態でも,端末aから接続切替の要求
(フッキング等)が発生すると,上記転送準備1,転送
準備2の場合と同様に,保留音を聴取させている局Zに
対し付加サービスメッセージ(FAC)が送出され,こ
れを受け取った局Zでは端末aと通話状態にある端末c
に保留音を聴取させ,保留音を聴取させられていた端末
bを端末aに接続して通話が可能なように接続切替えが
行われる。
Even in this state, when the connection switching request (hooking or the like) is generated from the terminal a, as in the case of the transfer preparation 1 and the transfer preparation 2, the additional service message is sent to the station Z listening to the hold tone. (FAC) is sent out, and the station Z which receives the (FAC) is in communication with the terminal a.
Then, the terminal b is made to listen to the hold tone, and the terminal b, which has been made to listen to the hold tone, is connected to the terminal a, and the connection is switched so that a call can be made.

【0044】この状態で,図11のjに示すように端末
aから切断を要求するDISCメッセージ(呼番号とし
て転送先の端末cの接続に使用したCRcを指定)を送
信すると,局Xから局Yへ送出される。このDISCメ
ッセージは,図10に示すフローにおいて局Zで受信さ
れる(図10のS3)。ここで,指定呼番号(CRc)
の使用しているチャネル(B1)に対して別の呼番号が
あるか判別し(同S4),別の呼番号が無いと既存処理
を行うが(同S5),別の呼番号があると指定呼番号の
通話者の端末が自局にあるか判別する(同S6)。この
場合,指定呼番号CRcが使用しているチャネルB1に
別の呼番号CRaが自局(Z局)にあるので,転送を行
う。
In this state, when a DISC message requesting disconnection (designating CRc used for connection of transfer destination terminal c as the call number) is sent from terminal a as shown in j of FIG. Sent to Y. This DISC message is received by station Z in the flow shown in FIG. 10 (S3 in FIG. 10). Here, the designated call code (CRc)
It is determined whether there is another call number for the channel (B1) used by (S4), and if there is no other call number, the existing process is performed (S5), but if there is another call number. It is determined whether or not the terminal of the caller with the designated call number is at the local station (at step S6). In this case, since another call number CRa is in its own station (Z station) on the channel B1 used by the designated call number CRc, transfer is performed.

【0045】この転送動作により,局Xの端末aと局Z
の端末cの接続が解放され,局Zの端末cと局Yの端末
bが接続され,図11のkに示すように解放を表すRE
Lメッセージが局Zから局Xに送出される
By this transfer operation, terminal a of station X and station Z
11 is released, the terminal c of the station Z and the terminal b of the station Y are connected, and RE indicating the release is shown as indicated by k in FIG.
L message is sent to the station X from the station Z.

【0046】次に図12,図13は転送準備4の実施例
の処理フロー(その1),(その2)であり,図14は
転送準備4の接続シーケンスである。この転送準備4
は,上記図2の(4) の転送形態の場合における動作であ
り,局Xの交換機に収容の端末番号aaaの端末aが,
中継局Wを介して接続する局Yの交換機に収容の端末番
号がbbbの端末bが通信中に,端末aから中継局Wを
介して接続する局Z交換機に収容の端末c(端末番号c
cc)への転送要求を発生した場合を例として説明す
る。
Next, FIGS. 12 and 13 are process flows (1) and (2) of the embodiment of the transfer preparation 4, and FIG. 14 is a connection sequence of the transfer preparation 4. This transfer preparation 4
Is the operation in the case of the transfer mode of (4) in FIG. 2 above, in which the terminal a with the terminal number aaa accommodated in the exchange of the station X is
While the terminal b having the terminal number bbb accommodated in the exchange of the station Y connected through the relay station W is communicating, the terminal c accommodated in the exchange Z exchange connected from the terminal a through the relay station W (terminal number c
The case where a transfer request to cc) is generated will be described as an example.

【0047】この場合,局Xと局Wの通話チャネルをB
1,通話呼番号をCRa,局Wと局Yの通話チャネルを
B2,通話呼番号をCRb,局Xと局W間の転送要求の
新しい呼番号をCRc,通話チャネルをB1とする。
In this case, the communication channel between the stations X and W is set to B.
1, a call call number is CRa, a call channel between stations W and Y is B2, a call call number is CRb, a new call number for a transfer request between stations X and W is CRc, and a call channel is B1.

【0048】図12において,局Xにおいて,転送要求
が発生すると(図12のS1),既通話者(端末bの通
話者)と転送先相手が同じ方路か判定し(同S2),同
じでない場合は既存処理を行い(同S4),同じ方路の
場合は呼設定メッセージ(SETUPという)を送出す
る(同S3)。ここで,図14により接続シーケンスを
説明する。
In FIG. 12, when a transfer request is generated in station X (S1 in FIG. 12), it is determined whether the already called party (caller of terminal b) and the transfer destination are the same route (S2), and the same. If not, the existing process is performed (at step S4), and if the route is the same, a call setup message (called SETUP) is sent out (at step S3). Here, the connection sequence will be described with reference to FIG.

【0049】図14には局Xの端末aと局Yの端末bと
が中継局Wを介して最初に接続されるシーケンスがa〜
eとして示されている。この場合,局Xから送出された
SETUP(図14のa)が,中継を行う局Wにおい
て,再設定され,呼番号,チャネル番号が変更されて局
Yに送出され(図14のb),図14のc〜eで示す各
メッセージが局Y,局W,局Xへ送信されて,端末aと
端末bとが接続される。
FIG. 14 shows a sequence in which the terminal a of the station X and the terminal b of the station Y are first connected via the relay station W.
Shown as e. In this case, the SETUP (a in FIG. 14) sent from the station X is reset in the relaying station W, the call number and the channel number are changed, and sent to the station Y (b in FIG. 14). Each message shown by c-e of FIG. 14 is transmitted to the station Y, the station W, and the station X, and the terminal a and the terminal b are connected.

【0050】その後,端末aと端末bが通話中の状態
で,局Xの端末aから,転送要求を表すSETUPが局
Wへ送出される(図12のS5)。このSETUPは,
上記図14のfに示すように,既通話呼の呼番号と異な
る呼番号CRcで,端末bとの呼接続に使用したのと同
じチャネル番号B1である。
After that, in a state where the terminals a and b are in a call, the terminal a of the station X sends out a SETUP indicating a transfer request to the station W (S5 in FIG. 12). This SETUP is
As shown in f of FIG. 14, the call number CRc is different from the call number of the already called call and is the same channel number B1 as that used for the call connection with the terminal b.

【0051】局WでこのSETUPメッセージが受信さ
れると(図12のS6),上記図9と同様にステップS
7〜S11の処理が行われ,チャネルの呼が中継されて
おり,転送先相手は自局収容端末でないことが判別され
ると,次にステップS12において転送先相手とチャネ
ルの呼は異なる方路か判別される。この場合,局Wで
は,転送先相手の端末cが局Zの方路であるため異なる
方路と判定し,転送準備4へ移行する(同S13)。
When the station W receives this SETUP message (S6 in FIG. 12), the same step S as in FIG. 9 is performed.
When the processing of 7 to S11 is performed and it is determined that the call of the channel is relayed and the transfer destination is not the terminal accommodated in the own station, then in step S12, the call of the transfer destination and the call of the channel are different routes. Is determined. In this case, in the station W, since the terminal c of the transfer destination is the path of the station Z, it is determined to be a different path, and the process proceeds to transfer preparation 4 (S13).

【0052】転送準備4の処理は図13に示され,最初
に既通話者の局Yの端末bに自局(局W)の保留音を接
続して端末bに保留音を聴取させる(図13のS1)。
次に転送先相手を接続する(同S2)。
The process of the transfer preparation 4 is shown in FIG. 13. First, the hold tone of the own station (station W) is connected to the terminal b of the station Y of the already called party so that the terminal b hears the hold tone (see FIG. 13 S1).
Next, the transfer destination is connected (at step S2).

【0053】この転送先相手の接続は,図14のfのS
ETUPを受信した後,転送先の局Zに対し,gに示す
ようなSETUPを作成して送出する。この場合,呼番
号はCRd,チャネル番号はB3とする。このSETU
Pが局Zで受信されて,端末cを呼出して,端末cで応
答すると,図14のh〜jに示すようにCALLPRO
Cメッセージ,ALERTメッセージ,CONNメッセ
ージが局Zから発生して,局Wを介して局Xへ送出され
る。こうして,局Xの端末aと局Zの端末cとが局Wを
介して接続される。この状態では,端末aと端末cの利
用者の間で通話が行われ,端末bは局Wからの保留音を
聞いている状態となる。
The connection of this transfer destination is S in FIG.
After receiving the ETUP, a SETUP as shown in g is created and transmitted to the transfer destination station Z. In this case, the call number is CRd and the channel number is B3. This SETU
When P is received at the station Z, calls the terminal c, and responds at the terminal c, as shown in h to j of FIG.
A C message, an ALERT message, and a CONN message are generated from the station Z and sent to the station X via the station W. In this way, the terminal a of the station X and the terminal c of the station Z are connected via the station W. In this state, a call is made between the users of the terminals a and c, and the terminal b is in a state of listening to the hold tone from the station W.

【0054】この状態で,図14のkに示すように端末
aから切断を要求するDISCメッセージ(呼番号とし
て転送先の端末cの接続に使用したCRcを指定)を送
信すると,局Xから局Wへ送出される。このDISCメ
ッセージは,図13に示すフローにおいて局Wで受信さ
れる(図13のS3)。ここで,指定呼番号(CRc)
の使用しているチャネル(B1)に対して別の呼番号が
あるか判別し(同S4),別の呼番号が無いと既存処理
を行うが(同S5),別の呼番号があると指定呼番号の
通話者の端末が自局にあるか判別する(同S6)。この
転送準備4の場合,指定呼番号CRcが使用しているチ
ャネルB1に別の呼番号CRaがあるが,指定呼番号の
呼の通話者の端末bが自局(局W)にないので,ステッ
プS7において,同チャネル(B1チャネル)の別の呼
の呼(呼番号CRa)の通話者が自局にあるか判別す
る。この判別において,端末bは自局(局W)にないた
め,次のステップS8において,転送先相手とチャネル
の呼は異なる方路か判別する。この転送準備4の場合,
転送先相手(端末c)とチャネルの呼(呼番号CRa)
は異なる方向であるから,ここで転送が実行される。
In this state, when a DISC message requesting disconnection from the terminal a (CRc used to connect the transfer destination terminal c is designated as the call number) is transmitted from the terminal a as shown in k of FIG. Sent to W. This DISC message is received by the station W in the flow shown in FIG. 13 (S3 in FIG. 13). Here, the designated call code (CRc)
It is determined whether there is another call number for the channel (B1) used by (S4), and if there is no other call number, the existing process is performed (S5), but if there is another call number. It is determined whether or not the terminal of the caller with the designated call number is at the local station (at step S6). In the case of this transfer preparation 4, there is another call number CRa in the channel B1 used by the designated call number CRc, but since the terminal b of the caller of the call of the designated call number is not in the own station (station W), In step S7, it is determined whether or not a caller of another call (call number CRa) of the same channel (B1 channel) is in the own station. In this determination, since the terminal b is not in its own station (station W), in the next step S8, it is determined whether the call of the transfer destination and that of the channel are different routes. In case of this transfer preparation 4,
Call of transfer destination (terminal c) and channel (call number CRa)
Is in a different direction, so the transfer is performed here.

【0055】なお,この転送動作には,DISCメッセ
ージを局Yへ送信する(図13では図示省略されてい
る)動作が含まれる。DISCメッセージが局Yで受信
されると,局Xの端末aから局Wを介して局Yの端末c
までの接続は解放され,局Yの端末bと局Zの端末cが
局Wにおいて接続され,図14のl(エル)に示すよう
に解放を表すRELメッセージが局Yから局Wを経由し
て局Xに送出される。
The transfer operation includes an operation of transmitting a DISC message to the station Y (not shown in FIG. 13). When the DISC message is received by the station Y, the terminal a of the station X transmits the terminal c of the station Y via the station W.
Connection is released, terminal b of station Y and terminal c of station Z are connected at station W, and a REL message indicating release is sent from station Y through station W as shown at l (el) in FIG. Sent to the station X.

【0056】[0056]

【発明の効果】本発明によればISDNプロトコルをサ
ポートする交換機により,転送要求端末と,その相手で
ある既通話端末が異なる局に収容されている場合に,転
送要求端末からの転送要求に対して,使用中チャネルに
対して別の呼番号を与えた呼設定メッセージ(SETU
P)を送出して,それを受信する局または,中継局にお
いて転送先相手までの接続を行い,既通話端末に対し保
留音を送出し,切断要求を送出することにより,転送先
相手端末と既通話端末とを接続することが可能となる。
これにより,通信回線を無駄に使用せず効率良くネット
ワークにまたがる転送を実現することができ,且つIS
DN交換機を大幅に変更することがなく,ISDN交換
機の機能に悪影響を与えることがない。
According to the present invention, when a transfer requesting terminal and an already called terminal which is a partner of the transfer requesting terminal are accommodated in different stations by an exchange supporting the ISDN protocol, a transfer request from the transfer requesting terminal is received. , A call setup message (SETU) that gives another call number to the channel in use.
P) is transmitted, and the station or relay station that receives it connects to the transfer destination partner, sends a hold tone to the already called terminal, and sends a disconnection request, so that the transfer destination terminal It becomes possible to connect with the already-called terminal.
As a result, it is possible to realize efficient transfer across the network without wasting communication lines, and to use the IS
The DN switch is not significantly changed, and the function of the ISDN switch is not adversely affected.

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

【図1】本発明によるネットワークを構成する交換機の
基本構成図である。
FIG. 1 is a basic configuration diagram of an exchange forming a network according to the present invention.

【図2】本発明による局間転送の転送準備の各例を示す
図である。
FIG. 2 is a diagram showing each example of transfer preparation for inter-station transfer according to the present invention.

【図3】転送準備1の実施例の処理フロー(その1)を
示す図である。
FIG. 3 is a diagram showing a processing flow (No. 1) of the embodiment of transfer preparation 1.

【図4】転送準備1の実施例の処理フロー(その2)を
示す図である。
FIG. 4 is a diagram showing a processing flow (No. 2) of the embodiment of transfer preparation 1.

【図5】転送準備1の接続シーケンスを示す図である。FIG. 5 is a diagram showing a connection sequence of transfer preparation 1.

【図6】転送準備2の実施例の処理フロー(その1)を
示す図である。
FIG. 6 is a diagram showing a processing flow (No. 1) of the embodiment of transfer preparation 2;

【図7】転送準備2の実施例の処理フロー(その2)を
示す図である。
FIG. 7 is a diagram showing a processing flow (No. 2) of the embodiment of transfer preparation 2;

【図8】転送準備2の接続シーケンスを示す図である。FIG. 8 is a diagram showing a connection sequence for transfer preparation 2;

【図9】転送準備3の実施例の処理フロー(その1)を
示す図である。
FIG. 9 is a diagram showing a processing flow (No. 1) of the embodiment of transfer preparation 3;

【図10】転送準備3の実施例の処理フロー(その2)
を示す図である。
FIG. 10 is a process flow of the embodiment of transfer preparation 3 (part 2)
FIG.

【図11】転送準備3の接続シーケンスを示す図であ
る。
FIG. 11 is a diagram showing a connection sequence of transfer preparation 3;

【図12】転送準備4の実施例の処理フロー(その1)
を示す図である。
FIG. 12 is a process flow of the embodiment of transfer preparation 4 (part 1)
FIG.

【図13】転送準備4の実施例の処理フロー(その2)
を示す図である。
FIG. 13 is a process flow of the embodiment of transfer preparation 4 (part 2)
FIG.

【図14】転送準備4の接続シーケンスを示す図であ
る。
FIG. 14 is a diagram showing a connection sequence for transfer preparation 4;

【図15】従来例の説明図である。FIG. 15 is an explanatory diagram of a conventional example.

【符号の説明】[Explanation of symbols]

1 交換機 10 通話路 11 中央制御装置 12 局間転送制御部 120 転送要求部 121 転送準備部 122 メッセージ分析部 123 メッセージ中継処理部 124 転送部 125 接続切替部 13 ISDNプロトコル通信制御部 14 記憶装置 15 端末 16 ISDNトランク DESCRIPTION OF SYMBOLS 1 exchange 10 communication path 11 central control device 12 inter-station transfer control unit 120 transfer request unit 121 transfer preparation unit 122 message analysis unit 123 message relay processing unit 124 transfer unit 125 connection switching unit 13 ISDN protocol communication control unit 14 storage device 15 terminal 16 ISDN trunk

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 ISDNプロトコルをサポートする交換
機で構成されるネットワークにおける局間転送方式にお
いて,交換機は,他局の既通話端末と通話中の自局収容
の端末からその既通話端末と同じ方路の後位局の転送先
相手端末への転送要求を受け取ると,情報要素の中に既
通話端末との接続で使用するチャネルと既通話端末との
接続とは別の呼番号が設定され転送先端末の表示を含む
呼設定メッセージを作成して後位局へ送出する手段を備
え,前記呼設定メッセージを受信する交換機は,前記呼
設定メッセージを分析し転送要求できることを識別する
と既通話端末と転送先相手端末が自局に収容されている
か判別し,収容されていると既通話端末に自局の保留音
を送信し,転送先相手端末を接続することを特徴とする
局間転送方式。
1. In an inter-station transfer method in a network composed of exchanges that support the ISDN protocol, the exchange is from the terminal of the own station that is in a call with the already-called terminal of another station to the same route as that of the already-called terminal. When a transfer request to the transfer destination terminal of the succeeding station is received, a call number different from the channel used for connection with the called terminal and the connection with the called terminal is set in the information element and the transfer destination is set. The exchange that has a means for creating a call setup message including the display of the terminal and sends it to the succeeding station, and the exchange that receives the call setup message analyzes the call setup message and determines that it can make a transfer request, and transfers it to the already called terminal. An inter-station transfer method characterized by determining whether the destination partner terminal is accommodated in the own station, and if so, transmitting the holding tone of the own station to the already called terminal and connecting the transfer destination partner terminal.
【請求項2】 請求項1において,前記呼設定メッセー
ジを受信した局の交換機は,既通話端末が自局に収容さ
れており,転送先相手端末が後位局に収容されているこ
とを判別すると,既通話端末に自局から保留音を送出
し,後位局に対し呼設定メッセージを送信することを特
徴とすることを特徴とする局間転送方式。
2. The exchange according to claim 1, wherein the exchange of the station which has received the call setup message determines that the already called terminal is accommodated in the own station and the transfer destination partner terminal is accommodated in the succeeding station. Then, the inter-office transfer method is characterized in that the holding station sends out a hold tone to the already called terminal and sends a call setup message to the succeeding station.
【請求項3】 請求項1において,前記呼設定メッセー
ジを受信した局の交換機は,転送先相手端末が自局に収
容されており,既通話端末が後位局に収容されているこ
とを判別すると,後位局の既通話端末に自局の保留音を
送出し,自局の転送先相手端末を接続することを特徴と
する局間転送方式。
3. The exchange according to claim 1, wherein the exchange of the station that has received the call setup message determines that the transfer destination terminal is accommodated in the own station and the already called terminal is accommodated in the succeeding station. Then, the inter-station transfer method is characterized in that the hold tone of the own station is transmitted to the already-called terminal of the succeeding station and the destination terminal of the transfer destination of the own station is connected.
【請求項4】 請求項1において,前記呼設定メッセー
ジを受信した局の交換機は,既通話端末と転送先相手端
末が同じ方路の後位局に収容されていることを判別する
と,受信した呼設定メッセージの情報を中継することを
特徴とする局間転送方式。
4. The exchange according to claim 1, wherein the exchange of the station which has received the call setup message receives the call-established message when it determines that the called terminal and the transfer-destination terminal are accommodated in the succeeding station of the same route. An inter-office transfer method characterized by relaying information of a call setup message.
【請求項5】 請求項1において,前記呼設定メッセー
ジを受信した局の交換機は,既通話端末と転送先相手端
末が異なる方路の後位局に収容されていることを判別す
ると,既通話端末に自局の保留音を送出し,後位局の転
送先相手端末を接続するための呼設定メッセージを送出
する手段を備えることを特徴とする局間転送方式。
5. The exchange of the station which received the call setup message according to claim 1, when it is determined that the called terminal and the transfer destination terminal are accommodated in the succeeding stations of different routes, the existing call is established. An inter-station transfer method comprising means for transmitting a hold tone of its own station to a terminal and transmitting a call setting message for connecting a transfer destination partner terminal of a succeeding station.
【請求項6】 請求項1乃至5の何れかにおいて,前記
転送先相手端末または既通話端末と接続されて通話が行
われた前記転送要求端末から接続切替を要求する信号を
発生すると,前記要求を受け取る交換機は,サービス種
別を接続切替,呼番号として前記既通話端末との呼番号
及び転送先相手端末との呼番号とした付加サービスメッ
セージを送出し,前記付加サービスメッセージが着信す
る交換機は,自局でそれらの呼の保留音を聴取させてい
ないとそのメッセージを中継し,自局でそれらの呼の保
留音を聴取させていると既通話端末と転送先相手端末と
の接続切替を行うことを特徴とする局間転送方式。
6. The request according to claim 1, wherein when a signal requesting connection switching is generated from the transfer requesting terminal that is connected to the transfer destination terminal or the already called terminal and has made a call, the request is issued. The exchange receiving the message sends a supplementary service message in which the service type is switched, the call number with the already called terminal and the call number with the transfer destination terminal are used as the call number, and the exchange receiving the supplementary service message receives If the hold tone of those calls is not heard at the own station, the message is relayed, and if the hold tone of those calls is heard at the own station, the connection between the already called terminal and the transfer destination partner terminal is switched. The inter-station transfer method characterized in that
【請求項7】 請求項1乃至6の何れかにおいて,前記
転送要求端末が呼を切断すると,該端末を収容する交換
機は,呼番号を既通話端末との呼番号または転送先相手
端末との呼番号を指定した切断メッセージを後位局に対
し送出し,前記切断メッセージを受信した交換機は,前
記呼番号の中の自局の保留音を聴取していると,要求端
末とのチャネルを解放し既通話端末と転送先端末を通話
状態にすることを特徴とする局間転送方式。
7. When the transfer requesting terminal disconnects a call according to any one of claims 1 to 6, the exchange accommodating the transfer requesting terminal exchanges the call number with the already called terminal or the transfer destination terminal. When the exchange which sends the disconnection message specifying the call number to the succeeding station and receives the disconnection message listens to the hold tone of its own station in the call number, releases the channel with the requesting terminal. An inter-office transfer method that puts the already called terminal and the transfer destination terminal into a call state.
JP7098353A 1995-04-24 1995-04-24 Inter-station transfer system Withdrawn JPH08293924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7098353A JPH08293924A (en) 1995-04-24 1995-04-24 Inter-station transfer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7098353A JPH08293924A (en) 1995-04-24 1995-04-24 Inter-station transfer system

Publications (1)

Publication Number Publication Date
JPH08293924A true JPH08293924A (en) 1996-11-05

Family

ID=14217533

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7098353A Withdrawn JPH08293924A (en) 1995-04-24 1995-04-24 Inter-station transfer system

Country Status (1)

Country Link
JP (1) JPH08293924A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6687361B1 (en) 1999-08-23 2004-02-03 Kabushiki Kaisha Toshiba Electronic exchange and key telephone system
US6826274B1 (en) 1999-03-12 2004-11-30 Fujitsu Limited Exchange control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6826274B1 (en) 1999-03-12 2004-11-30 Fujitsu Limited Exchange control method
US6687361B1 (en) 1999-08-23 2004-02-03 Kabushiki Kaisha Toshiba Electronic exchange and key telephone system

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