JPH01146651U - - Google Patents
Info
- Publication number
- JPH01146651U JPH01146651U JP4025188U JP4025188U JPH01146651U JP H01146651 U JPH01146651 U JP H01146651U JP 4025188 U JP4025188 U JP 4025188U JP 4025188 U JP4025188 U JP 4025188U JP H01146651 U JPH01146651 U JP H01146651U
- Authority
- JP
- Japan
- Prior art keywords
- office line
- extension telephone
- busy
- line
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Monitoring And Testing Of Exchanges (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Description
第１図は本考案の一実施例を示す構成図、第２
図は本考案の局線トランクの詳細図、第３図は本
考案による局線トランクの状態遷移図、第４図は
従来のこの種の装置の構成図、第５図は従来のこ
の種の装置の局線トランクの詳細図である。
１０……直通切替え回路、２０……構内電話交
換機、３０……内線電話機、２４……中央制御回
路、２５……局線トランク。
Fig. 1 is a configuration diagram showing one embodiment of the present invention;
Figure 3 is a detailed diagram of the central office line trunk of the present invention, Figure 3 is a state transition diagram of the central office line trunk according to the present invention, Figure 4 is a configuration diagram of a conventional device of this type, and Figure 5 is a diagram of the conventional FIG. 3 is a detailed view of the central office trunk of the device; 10...direct switching circuit, 20...private telephone exchange, 30...extension telephone, 24...central control circuit, 25...office line trunk.
Claims (1)
話中信号又はメークビジイスイツチからの信号に
より、局線と内線電話機の直通状態を保持するか
又はメークビジイスイツチの操作により、局線と
内線を直通状態に切替える手段と、中央制御回路
にこれら局線と内線間の状態を検出させる手段中
央制御回路とを備えたことを特徴とする局線トラ
ンク回路。 The direct communication between the office line and the extension telephone is maintained by a busy signal from the direct switching circuit between the office line and the extension telephone or the signal from the make-busy switch, or the direct communication between the office line and the extension telephone is maintained by operation of the make-busy switch. A central control circuit for causing the central control circuit to detect the state between the central office line and the extension line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4025188U JPH01146651U (en) | 1988-03-29 | 1988-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4025188U JPH01146651U (en) | 1988-03-29 | 1988-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01146651U true JPH01146651U (en) | 1989-10-09 |
Family
ID=31266725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4025188U Pending JPH01146651U (en) | 1988-03-29 | 1988-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01146651U (en) |
-
1988
- 1988-03-29 JP JP4025188U patent/JPH01146651U/ja active Pending