JPH0253654U - - Google Patents
Info
- Publication number
- JPH0253654U JPH0253654U JP13119488U JP13119488U JPH0253654U JP H0253654 U JPH0253654 U JP H0253654U JP 13119488 U JP13119488 U JP 13119488U JP 13119488 U JP13119488 U JP 13119488U JP H0253654 U JPH0253654 U JP H0253654U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- series connection
- circuit
- connection body
- matching transformer
- 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
- 239000003990 capacitor Substances 0.000 claims 6
- 230000008054 signal transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 1
Landscapes
- Devices For Supply Of Signal Current (AREA)
Description
第１図は本考案の電話端末直流回路の結線図、
第２図はダイヤルパルス送出時における局線間の
電圧の波形グラフ、第３図は電話機に敷設したＬ
ＣＲアダプタと交換機への局線との切換えの説明
図、第４図は従来の直流回路の要部である充放電
回路の結線図である。
Ｌ１，Ｌ２：局線、Ｋ：フツクスイツチ、Ｐ１
：第１のホトカブラ、Ｐ２：第２のホトカブラ、
ＤＣ：直流回路、ＣＣ：充放電回路、ＴＣ：通話
回路、ＡＤＰ：ＬＣＲアダプタ、ＴＥＬ：電話器
。
Figure 1 is a wiring diagram of the telephone terminal DC circuit of the present invention.
Figure 2 is a waveform graph of the voltage between the office lines when dial pulses are sent out, and Figure 3 is the L line installed in the telephone.
An explanatory diagram of switching between a CR adapter and a central office line to an exchange, and FIG. 4 is a wiring diagram of a charging/discharging circuit which is a main part of a conventional DC circuit. L1 , L2 : Office line, K: Hook switch, P1
: 1st photocoupler, P 2 : 2nd photocoupler,
DC : Direct current circuit, CC: Charge/discharge circuit, TC: Telephone circuit, ADP: LCR adapter, TEL: Telephone.
Claims (1)
との間に整合トランスを含む少なくとも選択信号
送出のための直流回路において、 (1) 前記局線に接がれたダイオードブリツジの
直流側の１端子に、電話器の発呼により閉成され
るフツキングスイツチと、 (2) ＣＰＵの指令に基づきダイヤルパルスを局
線に対して送出する第１のフオトカプラとが直列
接続されるとともに、 (3) 上記ダイヤルパルスの送出時で、メーク期
間の波形歪抑圧用の第２のフオトカプラと、 (4) エミツタ極を第１の抵抗器と接続したトラ
ンジスタを有する第１の直列接続体と、 (5) 第１のコンデンサと第３の抵抗器との第２
の直列接続体とを前記整合トランスと第２のコン
デンサとの直列接続回路に跨つて並列に設け、 (6) 上記第２の直列接続体の接続点が上記トラ
ンジスタのベース極との間に第２の抵抗器を、ま
た (7) 上記整合トランスの第２のコンデンサとの
接接点に第３のコンデンサを夫夫接続して成り、
上記第１のコンデンサが上記第３のコンデンサに
より充電を加速されるようにしたことを特徴とす
る電話端末直流回路。[Claims for Utility Model Registration] In a direct current circuit for at least selection signal transmission that includes a matching transformer between two terminals of a central office line connected to a telephone exchange and a communication circuit, (1) (2) A first photocoupler that sends dial pulses to the central office line based on instructions from the CPU; and (3) a second photocoupler for suppressing waveform distortion during the make period when sending out the dial pulse, and (4) a transistor whose emitter pole is connected to the first resistor. a first series connection body; (5) a second series connection body of the first capacitor and the third resistor;
(6) a series connection body is provided in parallel across the series connection circuit of the matching transformer and the second capacitor; (7) A third capacitor is connected to the contact point of the matching transformer with the second capacitor,
A telephone terminal DC circuit characterized in that charging of the first capacitor is accelerated by the third capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13119488U JPH083079Y2 (en) | 1988-10-06 | 1988-10-06 | Telephone terminal DC circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13119488U JPH083079Y2 (en) | 1988-10-06 | 1988-10-06 | Telephone terminal DC circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0253654U true JPH0253654U (en) | 1990-04-18 |
| JPH083079Y2 JPH083079Y2 (en) | 1996-01-29 |
Family
ID=31387033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13119488U Expired - Lifetime JPH083079Y2 (en) | 1988-10-06 | 1988-10-06 | Telephone terminal DC circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH083079Y2 (en) |
-
1988
- 1988-10-06 JP JP13119488U patent/JPH083079Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH083079Y2 (en) | 1996-01-29 |
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