JPS62198749U - - Google Patents
Info
- Publication number
- JPS62198749U JPS62198749U JP8635486U JP8635486U JPS62198749U JP S62198749 U JPS62198749 U JP S62198749U JP 8635486 U JP8635486 U JP 8635486U JP 8635486 U JP8635486 U JP 8635486U JP S62198749 U JPS62198749 U JP S62198749U
- Authority
- JP
- Japan
- Prior art keywords
- level
- hands
- receiving
- turned
- control circuit
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
第１図及び第２図は、それぞれ本考案の第１実
施例及び第２実施例の回路図である。
（主な記号）４……比較器、９……レベル低減手
段（ダイオード）、１１……スイツチ手段（トラ
ンジスタ）、１３……スイツチ手段（手動スイツ
チ）。
1 and 2 are circuit diagrams of a first embodiment and a second embodiment of the present invention, respectively. (Main symbols) 4... Comparator, 9... Level reduction means (diode), 11... Switch means (transistor), 13... Switch means (manual switch).
Claims (1)
るボイススイツチング方式のハンズフリー通話装
置に於いて、送・受話レベル比較器に入力される
受話レベル入力を前段から出力されたレベルより
低くするためのレベル低減手段と、当該レベル低
減手段を上記送・受話レベル比較器の受話レベル
入力端子と前段との間に接・離制御するスイツチ
手段でなるハンズフリー制御回路。 ２ レベル低減手段が受話レベル入力端子に接続
され、スイツチ手段が上記レベル低減手段と並列
に接続されていて、当該スイツチ手段が電話交換
装置又は電話機の制御装置からの外線通話情報で
オン、内線通話情報でオフとなるように制御され
る実用新案登録請求の範囲第１項に記載のハンズ
フリー制御回路。 ３ レベル低減手段が受話レベル入力端子に接続
され、かつスイツチ手段が手動操作スイツチであ
つて上記レベル低減手段と並列に接続された実用
新案登録請求の範囲第１項に記載のハンズフリー
制御回路。[Scope of Claim for Utility Model Registration] 1. In a voice switching type hands-free communication device installed in a telephone set housed in a telephone exchange device, the receiving level input input to the transmitting/receiving level comparator is outputted from the previous stage. a hands-free control circuit comprising: a level reducing means for lowering the level to a level lower than the received level; and a switch means for connecting/disconnecting the level reducing means between the receiving level input terminal of the transmitting/receiving level comparator and the preceding stage. 2. A level reduction means is connected to the receiving level input terminal, a switch means is connected in parallel with the level reduction means, and the switch means is turned on in response to external call information from the telephone exchange or the control device of the telephone, and the internal call is turned on. The hands-free control circuit according to claim 1, which is controlled to be turned off by information. 3. The hands-free control circuit according to claim 1, wherein the level reducing means is connected to the reception level input terminal, and the switch means is a manually operated switch connected in parallel with the level reducing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986086354U JPH0311985Y2 (en) | 1986-06-06 | 1986-06-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986086354U JPH0311985Y2 (en) | 1986-06-06 | 1986-06-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62198749U true JPS62198749U (en) | 1987-12-17 |
| JPH0311985Y2 JPH0311985Y2 (en) | 1991-03-22 |
Family
ID=30942580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986086354U Expired JPH0311985Y2 (en) | 1986-06-06 | 1986-06-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0311985Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6164771U (en) * | 1984-09-30 | 1986-05-02 |
-
1986
- 1986-06-06 JP JP1986086354U patent/JPH0311985Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6164771U (en) * | 1984-09-30 | 1986-05-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0311985Y2 (en) | 1991-03-22 |
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