JPS6188364U - - Google Patents
Info
- Publication number
- JPS6188364U JPS6188364U JP17106884U JP17106884U JPS6188364U JP S6188364 U JPS6188364 U JP S6188364U JP 17106884 U JP17106884 U JP 17106884U JP 17106884 U JP17106884 U JP 17106884U JP S6188364 U JPS6188364 U JP S6188364U
- Authority
- JP
- Japan
- Prior art keywords
- loop
- line
- telephone line
- polarity reversal
- monitoring means
- 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
- 238000001514 detection method Methods 0.000 claims 4
- 238000012544 monitoring process Methods 0.000 claims 4
- 230000001934 delay Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 101100280118 Homo sapiens ETV7 gene Proteins 0.000 description 1
- 241000120020 Tela Species 0.000 description 1
- 102100027263 Transcription factor ETV7 Human genes 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
Description
図は本考案の実施例を示し、第１図は回線側の
回路図、第２図は制御側の回路図、第３図および
第４図は第２図における各部の波形を示す図であ
る。
１〜５，８〜１０，２１〜２５，２８〜３０，
４１〜４３，５１〜５３…ＩＮＶ（インバータ）
、６，１１，２６，２７，３１，４４，５５，５
６，６１…ＡＮＤゲート、７…ＢＦ（バツフア）
、Ｌ１，Ｌ２…線路端子、ＴＡ１，ＴＡ２，ＴＢ
１，ＴＢ２…端子、ＴＥＬＡ，ＴＥＬＢ…電話機
、ＬＰＡ，ＬＰＢ…ループリレー、Ａ，Ｂ，Ｄ…
リレー、ｌｐａ，ｌｐｂ，ａ０，ａ１，ｂ０，ｂ
１，ｄ０，ｄ１…接点、ＰＣ１…フオトカプラ、
Ｒ１〜Ｒ３０…抵抗器、Ｃ１〜Ｃ１５…コンデン
サ、Ｄ１〜Ｄ１９…ダイオード、Ｑ１〜Ｑ６…Ｆ
ＥＴ（電界効果トランジスタ）。
The figures show an embodiment of the present invention, in which Fig. 1 is a circuit diagram of the line side, Fig. 2 is a circuit diagram of the control side, and Figs. 3 and 4 are diagrams showing waveforms of various parts in Fig. 2. . 1-5, 8-10, 21-25, 28-30,
41-43, 51-53...INV (inverter)
, 6, 11, 26, 27, 31, 44, 55, 5
6, 61...AND gate, 7...BF (batshua)
, L 1 , L 2 ... line terminal, TA 1 , TA 2 , TB
1 , TB 2 ...terminal, TELA, TELB...telephone, LPA, LPB...loop relay, A, B, D...
Relay, lpa, lpb, a 0 , a 1 , b 0 , b
1 , d 0 , d 1 ...contact, PC1...photocoupler,
R1-R30...Resistor, C1-C15...Capacitor, D1-D19...Diode, Q1-Q6...F
ET (field effect transistor).
Claims (1)
機と対応して設けたループ監視手段と、該ループ
監視手段の監視出力に応じて他の電話機を前記電
話回線から切離す秘話スイツチ素子とを備える回
線自動切替装置において、前記ループ監視手段の
ループ開放出力により前記秘話スイツチ素子を遅
延して復旧させる遅延回路と、前記電話回線の線
間電圧極性反転を検出する転極検出回路と、該転
極検出回路の検出々力により前記電話回線の保持
ループを閉成しかつ接続されたすべての電話機が
オンフツク状態となるのに応じて前記保持ループ
を開放する回線保持回路とを設けたことを特徴と
する回線自動切替装置。 A loop monitoring means provided corresponding to a plurality of telephones connected in parallel to the same telephone line, and a privacy switch element for disconnecting other telephones from the telephone line in accordance with a monitoring output of the loop monitoring means. In the automatic line switching device, a delay circuit that delays and restores the secret switch element by a loop opening output of the loop monitoring means, a polarity reversal detection circuit that detects line voltage polarity reversal of the telephone line, and a polarity reversal detection circuit that detects line voltage polarity reversal of the telephone line; A line holding circuit is provided which closes the holding loop of the telephone line by the detection force of the detection circuit and opens the holding loop when all connected telephones become on-hook. automatic line switching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17106884U JPS6188364U (en) | 1984-11-13 | 1984-11-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17106884U JPS6188364U (en) | 1984-11-13 | 1984-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6188364U true JPS6188364U (en) | 1986-06-09 |
Family
ID=30728769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17106884U Pending JPS6188364U (en) | 1984-11-13 | 1984-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6188364U (en) |
-
1984
- 1984-11-13 JP JP17106884U patent/JPS6188364U/ja active Pending
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