JPS63156150U - - Google Patents
Info
- Publication number
- JPS63156150U JPS63156150U JP4674987U JP4674987U JPS63156150U JP S63156150 U JPS63156150 U JP S63156150U JP 4674987 U JP4674987 U JP 4674987U JP 4674987 U JP4674987 U JP 4674987U JP S63156150 U JPS63156150 U JP S63156150U
- Authority
- JP
- Japan
- Prior art keywords
- network control
- control signal
- speaker
- circuit
- predetermined period
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例に係る網制御信号モ
ニタ回路を含むデータ伝送用変復調装置の回路構
成を示すブロツク図、第２図は従来例の構成を示
すブロツク図である。
１……入力端子、２……出力端子、３……伝送
路接続端、４……送信器、５……受信器、６……
スピーカ、７，８……中継トランス、９……電話
回路、１０，１１，１２，１００……切替器、１
３……自動利得制御回路、１４……増幅器。
FIG. 1 is a block diagram showing the circuit configuration of a data transmission modulation/demodulation apparatus including a network control signal monitoring circuit according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional example. 1...Input terminal, 2...Output terminal, 3...Transmission line connection end, 4...Transmitter, 5...Receiver, 6...
Speaker, 7, 8... Relay transformer, 9... Telephone circuit, 10, 11, 12, 100... Switcher, 1
3... automatic gain control circuit, 14... amplifier.
Claims (1)
するデータ伝送用変復調装置の網制御信号をスピ
ーカによりモニタする網制御信号モニタ回路にお
いて、 データ伝送用変復調装置の受信器に設けた自動
利得制御回路と、 この自動利得制御回路を通して得られる網制御
信号をモニタ初期に所定期間前記スピーカへ供給
せず、前記所定期間経過後、前記網制御信号をス
ピーカへ加える切替手段とを有することを特徴と
する網制御信号モニタ回路。[Scope of Claim for Utility Model Registration] In a network control signal monitor circuit that uses a speaker to monitor network control signals of a data transmission modulation and demodulation device having an automatic transmission function that transmits data over a communication line, an automatic gain control circuit provided, and a switching means that does not supply the network control signal obtained through the automatic gain control circuit to the speaker for a predetermined period at the initial stage of monitoring, and adds the network control signal to the speaker after the elapse of the predetermined period. A network control signal monitor circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4674987U JPS63156150U (en) | 1987-03-31 | 1987-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4674987U JPS63156150U (en) | 1987-03-31 | 1987-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63156150U true JPS63156150U (en) | 1988-10-13 |
Family
ID=30866700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4674987U Pending JPS63156150U (en) | 1987-03-31 | 1987-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63156150U (en) |
-
1987
- 1987-03-31 JP JP4674987U patent/JPS63156150U/ja active Pending
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