JPS6221436B2 - - Google Patents

Info

Publication number
JPS6221436B2
JPS6221436B2 JP54131448A JP13144879A JPS6221436B2 JP S6221436 B2 JPS6221436 B2 JP S6221436B2 JP 54131448 A JP54131448 A JP 54131448A JP 13144879 A JP13144879 A JP 13144879A JP S6221436 B2 JPS6221436 B2 JP S6221436B2
Authority
JP
Japan
Prior art keywords
audio amplifier
call
trunk
audio
gain
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
Application number
JP54131448A
Other languages
Japanese (ja)
Other versions
JPS5656087A (en
Inventor
Yoshio Koda
Juji Matsuo
Masaharu Murata
Masao Domae
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Nippon Electric Co 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 Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP13144879A priority Critical patent/JPS5656087A/en
Publication of JPS5656087A publication Critical patent/JPS5656087A/en
Publication of JPS6221436B2 publication Critical patent/JPS6221436B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements
    • H04Q3/42Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Description

【発明の詳細な説明】 本発明は電話交換機用トランク回路に関し、特
に音声増幅器を搭載したトランク回路に関する。
電話交換において伝送される信号レベルの調整の
ためトランク回路に音声増幅器が搭載される場合
がある。このとき、トランク回路に伝送回線が固
定されていて、音声増幅器のレベルを1度固定す
れば良い場合、および伝送回線が発・着信の呼に
より一定せず通話中の音声レベルにより自動的に
ゲインが可変となる音声増幅器を設ける場合の2
種類ある。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trunk circuit for a telephone exchange, and more particularly to a trunk circuit equipped with an audio amplifier.
Audio amplifiers may be included in trunk circuits to adjust the signal levels transmitted in telephone exchanges. At this time, if the transmission line is fixed in the trunk circuit and the level of the audio amplifier only needs to be fixed once, or if the transmission line is not constant depending on the incoming and outgoing calls and the gain is automatically adjusted depending on the audio level during the call. 2 when installing an audio amplifier with variable
There are different types.

本発明は後者の可変方式を対象とするものであ
る。従来、この種のトランク回路では、常時トラ
ンクに音声増幅器が接続されたままであつた。従
つて、第1の欠点として呼出音等のレベルの大き
な可聴信号音が該音声増幅器に加わつた場合増幅
器のゲインを下げる方向に過補償されてしまう。
また、第2の欠点とし通話音声レベルが大であり
該音声増幅器のゲインがOdBまで下つたとして
も、該音声増幅器が通話路に入つたままである為
通話品質が劣化する場合があつた。
The present invention is directed to the latter variable method. Conventionally, in this type of trunk circuit, the audio amplifier remains connected to the trunk at all times. Therefore, the first drawback is that when a high-level audible signal sound such as a ringing tone is applied to the audio amplifier, overcompensation occurs in the direction of lowering the gain of the amplifier.
A second drawback is that even if the voice level of the call is high and the gain of the audio amplifier drops to OdB, the audio amplifier remains in the communication path, resulting in deterioration of the quality of the call.

本発明の目的は、トランク回路に音声増幅器の
バイパス回路を設け交換機の制御装置側で検出し
た通話中の情報により、該バイパス回路を制御
し、通話中は該音声増幅器を中継させ、その他の
場合は該音声増幅器をバイパスさせることにより
上記第1の欠点を除去し、また該音声増幅器のレ
ベル監視回路により通話音声レベルが大きく、該
音声増幅器のゲインが必要ないと判定された場合
には該音声増幅器からの出力情報により該バイパ
ス回路を制御し通話中であつても該音声増幅器を
バイパスさせる事により上記第2の欠点を除去
し、通話品質をより向上するようにしたトランク
回路を提供することにある。
An object of the present invention is to provide a bypass circuit for an audio amplifier in a trunk circuit, and control the bypass circuit based on information on a call detected by a control device of an exchange, so that the audio amplifier is relayed during a call, and in other cases. eliminates the first drawback by bypassing the audio amplifier, and if the level monitoring circuit of the audio amplifier determines that the call audio level is high and the gain of the audio amplifier is not necessary, the audio To provide a trunk circuit which eliminates the second drawback and further improves call quality by controlling the bypass circuit using output information from the amplifier and bypassing the audio amplifier even during a call. It is in.

本発明のトランク回路は、通話中の平均音声レ
ベルにより自動的にゲインが調整される音声増幅
器と、該音声増幅器を通話路に接続し、またバイ
パスするバイパス回路を設けたことを特徴とす
る。
The trunk circuit of the present invention is characterized by being provided with an audio amplifier whose gain is automatically adjusted according to the average audio level during a call, and a bypass circuit that connects and bypasses the audio amplifier to the communication path.

また、本発明における前記バイパス回路の制御
は交換機の制御回路よりなされ、通話中に該音声
増幅器のゲインを必要とする時のみ該音声増幅器
を中継する回路であり、また、該トランク回路と
該音声増幅器とをリンクにより接続し空音声増幅
器を別のトランクでも使用可能とし該音声増幅器
の必要個数を減らすこともできる。
Furthermore, the bypass circuit in the present invention is controlled by a control circuit of an exchange, and is a circuit that relays the audio amplifier only when the gain of the audio amplifier is required during a call. The number of necessary audio amplifiers can be reduced by connecting an amplifier with a link so that an empty audio amplifier can be used in another trunk.

次に図面を参照して本発明について説明する。
第1図は本発明の一実施例として着信転送サービ
スの場合を示す中継方式図である。本図のAは発
信加入者、Bは着信転送サービス要求中の加入
者、CはBの転送先加入者である。NWは各交換
局のネツトワーク、ICTはトランク、OGTは出
トランク、TRKはバイパス回路が組み込まれた
着信転送用のトランク、AMPはゲイン可変の音
声増幅器である。また、図においては加入者A、
B、Cが別々の交換局に収容された場合を示して
いるが、加入者A、B、Cのいずれか2者又は3
者が同一交換局に収容される場合もある。
Next, the present invention will be explained with reference to the drawings.
FIG. 1 is a relay system diagram showing a call transfer service as an embodiment of the present invention. In this figure, A is the originating subscriber, B is the subscriber requesting the call transfer service, and C is the subscriber to whom B is transferred. NW is the network of each exchange, ICT is a trunk, OGT is an outgoing trunk, TRK is a trunk for incoming call transfer with a built-in bypass circuit, and AMP is an audio amplifier with variable gain. Also, in the figure, subscriber A,
This shows a case where subscribers B and C are accommodated in separate exchanges, but if any two or three of subscribers A, B, and C
In some cases, individuals may be housed in the same exchange.

次に着信転送サービスの動作を説明する。加入
者Aが加入者Bのダイヤルを行うと、中継線10
を通り加入者Bの収容されている交換局21に着
信される。交換局21では加入者Bが着信転送サ
ービスを要求中であると加入者Cを検出し、加入
者Cを呼出すべくNWのパス1は接続せず、NW
のパス2および3を接続し、TRK及び中継線1
1を経由し、加入者Aと、加入者Cを接続する。
AMPは加入者Cが応答し通話中となつた時に中
継する事となり、中継線10又は11のロス分を
補償する。従つて加入者A・B、B・C又はA・
B・Cが同一交換局に収容されている場合には中
継線のロス分を補償する必要のない場合も生じて
来る為、AMP内の検出回路の制御により、TRK
内のAMPをバイパスする回路を動作させる事に
なる。
Next, the operation of the call transfer service will be explained. When subscriber A dials subscriber B, trunk line 10
The call is received at the exchange 21 where subscriber B is accommodated. The exchange 21 detects subscriber C that subscriber B is requesting a call transfer service, and in order to call subscriber C, NW path 1 is not connected and the NW
Connect paths 2 and 3 of TRK and trunk 1
1, subscriber A and subscriber C are connected.
The AMP relays the call when the subscriber C answers and becomes busy, and compensates for the loss of the trunk line 10 or 11. Therefore, subscriber A.B, B.C or A.
If B and C are accommodated in the same exchange, there may be cases where it is not necessary to compensate for the loss of the trunk line, so by controlling the detection circuit in the AMP, TRK
This will operate a circuit that bypasses the AMP inside.

第2図は第1図におけるTRKとAMPの概略を
示した図である。TRKはLPリレーを有し、この
LPリレーの接点LPにより通話線(A、B線)4
0と通話線(A、B線)41とを直接接続するバ
イパスルートおよびAMPに接続するルートを形
成する。
FIG. 2 is a diagram schematically showing TRK and AMP in FIG. 1. TRK has an LP relay and this
The contact L P of the LP relay connects the communication line (A, B line) 4.
0 and the communication lines (A, B lines) 41 and a route connecting to the AMP are formed.

制御部CONTは通話前に送出される呼出信号等
の可聴信号に対しては通話線40および41が直
接接続されるようにLPリレーを動作させる。
The control unit CONT operates the LP relay so that the communication lines 40 and 41 are directly connected to an audible signal such as a calling signal sent before a telephone conversation.

また、通話に入つたことをこのCONTが検出す
るとTRKのLPリレーを動作させ通話線40およ
び41をAMPのハイブリツドトランスH32お
よび33にそれぞれ接続する。ハイブリツドトラ
ンス32および33は通話音声を方向別に分離
し、その出力を増幅器30および31へ入力す
る。増幅器30および31は増幅器本体301,
311、レベル監視回路302,312、および
ゲインコントローラ303,313を備えてい
る。レベル監視回路302,312は通話開始時
点に初期設定され、入力レベルをチエツクし増幅
器本体301,311のゲインが下がる方向の制
御信号をゲインコントローラ303,313へ供
給する。ゲインコントローラ303,313はこ
の制御信号を受けると増幅器本体301,311
のゲインを変化させて最適値に設定する。以上の
動作をそれぞれ増幅器30および31は独立に行
なう。
Furthermore, when this CONT detects that a call has begun, it operates the LP relay of TRK and connects the communication lines 40 and 41 to the hybrid transformers H32 and 33 of the AMP, respectively. Hybrid transformers 32 and 33 separate the call voice according to direction, and input their outputs to amplifiers 30 and 31. Amplifiers 30 and 31 are amplifier main bodies 301,
311, level monitoring circuits 302, 312, and gain controllers 303, 313. The level monitoring circuits 302, 312 are initialized at the start of a call, check the input level, and supply control signals to the gain controllers 303, 313 in the direction of decreasing the gain of the amplifier bodies 301, 311. When the gain controllers 303 and 313 receive this control signal, they control the amplifier main bodies 301 and 311.
Change the gain of and set it to the optimal value. Amplifiers 30 and 31 perform the above operations independently.

また、ゲインコントローラ303および313
の二つともが増幅器本体301,311のゲイン
を0dBに設定するように制御した場合は、その旨
を制御回路35へ与える。その結果接点34は動
作し、出力をCONTへ供給する。CONTはその情
報を読み取り、LPリレーを復旧させTRKのバイ
パス回路を形成する。
In addition, gain controllers 303 and 313
When both of the amplifier main bodies 301 and 311 are controlled so that their gains are set to 0 dB, this fact is sent to the control circuit 35. As a result, contact 34 operates and provides an output to CONT. CONT reads that information, restores the LP relay, and forms a bypass circuit for TRK.

なお本発明では加入者線(中継線)損失の補償
および通話品質劣化防止を主な目的としており、
通常その補償量は使用される通話線および電話機
等で決定されるのでAMPのゲインを一度決定す
れば、支障なくその通話が行なえる。
The main purpose of the present invention is to compensate for subscriber line (relay line) loss and to prevent deterioration of call quality.
Normally, the amount of compensation is determined by the telephone line and telephone set used, so once the AMP gain is determined, the telephone conversation can be made without any problems.

したがつてLPリレー復旧後、すなわちAMPを
取り除いた後に音声レベルが低下することはまれ
であり、この対策を考慮する必要はない。
Therefore, it is rare for the audio level to drop after the LP relay is restored, that is, after the AMP is removed, and there is no need to consider this countermeasure.

以上の様な動作及び機能を持たせる事により呼
出音等の可聴信号が音声増幅器を通り音声増幅器
のレベルコントロールが働くまで異常に大きな音
を加入者Aに送出したり、ゲインコントロールが
過大に働き通話に入つた場合の通話音声が小さく
なつてしまうという事が防止できる。また加入者
A、B、Cが同一交換局の場合は中継線のロスが
無い為音声増幅器が不要となる可能性が強い。こ
の場合無意味に音声増幅器を中継し通話品質を劣
化させる事を防止できる効果がある。
By providing the above operations and functions, an audible signal such as a ringer passes through the audio amplifier, and an abnormally loud sound is sent to subscriber A until the level control of the audio amplifier is activated, or the gain control is activated excessively. It is possible to prevent the voice from becoming low when a call is started. Furthermore, if subscribers A, B, and C share the same exchange, there is no loss in trunk lines, so there is a strong possibility that an audio amplifier will not be necessary. In this case, there is an effect of preventing deterioration of speech quality due to meaningless relaying of the audio amplifier.

以上着信転送サービスを例に取つて双方向音声
増幅器が中継された場合を説明したが、本発明は
片方向の音声増幅器の場合についても同様に適用
される。
Although the case where a two-way audio amplifier is relayed has been described above by taking the call transfer service as an example, the present invention is similarly applicable to the case where a one-way audio amplifier is used.

【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を示す中継方式図、
第2図は本発明のトランク回路及び接続された音
声増幅器の概略を示したブロツク図である。 NW:ネツトワーク、ICT:入トランク、
OGT:出トランク、TRK:本発明のトランク回
路、AMP:音声増幅器、A,B,C:電話加入
者、CONT:制御装置、LP:折返し用リレー、
1,2,3:ネツトワークの通話パス、10,1
1:中継線、20,21,22:電話交換局、3
0,31:増幅器、32,33:ハイブリツトト
ランス、34:増幅器のゲインOdBの時出力を出
す接点、40,41:通話線。
FIG. 1 is a relay system diagram showing an embodiment of the present invention;
FIG. 2 is a block diagram schematically showing the trunk circuit and connected audio amplifier of the present invention. NW: Network, ICT: Incoming trunk,
OGT: Outgoing trunk, TRK: Trunk circuit of the present invention, AMP: Audio amplifier, A, B, C: Telephone subscriber, CONT: Control device, LP: Return relay,
1, 2, 3: network call path, 10, 1
1: Trunk line, 20, 21, 22: Telephone exchange, 3
0, 31: Amplifier, 32, 33: Hybrid transformer, 34: Contact that outputs when the amplifier gain is OdB, 40, 41: Communication line.

Claims (1)

【特許請求の範囲】[Claims] 1 通話中の平均音声レベルによりゲインを設定
する音声増幅器と、制御部からの指示により該音
声増幅器を通話路に接続するかバイパスさせるか
の切替えを行なうバイパス手段を設け、該バイパ
ス手段は通話中のみ前記音声増幅器を通話路に接
続し、その他の可聴信号を伝送する場合および通
話音声レベルが大きく、該音声増幅器のゲインが
必要ない場合は該音声増幅器をバイパスさせる事
を特徴とするトランク回路。
1. An audio amplifier whose gain is set according to the average sound level during a call, and a bypass means that connects the audio amplifier to the communication path or bypasses it according to instructions from a control unit, and the bypass means The trunk circuit is characterized in that the audio amplifier is only connected to a communication path, and the audio amplifier is bypassed when other audible signals are transmitted or when the audio level of the audio communication is high and the gain of the audio amplifier is not required.
JP13144879A 1979-10-12 1979-10-12 Trunk circuit Granted JPS5656087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13144879A JPS5656087A (en) 1979-10-12 1979-10-12 Trunk circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13144879A JPS5656087A (en) 1979-10-12 1979-10-12 Trunk circuit

Publications (2)

Publication Number Publication Date
JPS5656087A JPS5656087A (en) 1981-05-16
JPS6221436B2 true JPS6221436B2 (en) 1987-05-12

Family

ID=15058188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13144879A Granted JPS5656087A (en) 1979-10-12 1979-10-12 Trunk circuit

Country Status (1)

Country Link
JP (1) JPS5656087A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10749022B2 (en) 2018-09-14 2020-08-18 Kabushiki Kaisha Toshiba Semiconductor device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587965A (en) * 1981-07-07 1983-01-17 Masao Uchiumi Transfer telephone circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5283104A (en) * 1975-12-31 1977-07-11 Fujitsu Ltd Switching system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5283104A (en) * 1975-12-31 1977-07-11 Fujitsu Ltd Switching system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10749022B2 (en) 2018-09-14 2020-08-18 Kabushiki Kaisha Toshiba Semiconductor device

Also Published As

Publication number Publication date
JPS5656087A (en) 1981-05-16

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