JPH04246960A - Order telephone system - Google Patents
Order telephone systemInfo
- Publication number
- JPH04246960A JPH04246960A JP1176291A JP1176291A JPH04246960A JP H04246960 A JPH04246960 A JP H04246960A JP 1176291 A JP1176291 A JP 1176291A JP 1176291 A JP1176291 A JP 1176291A JP H04246960 A JPH04246960 A JP H04246960A
- Authority
- JP
- Japan
- Prior art keywords
- line
- pilot signal
- meeting
- master station
- switch
- 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 abstract description 9
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract description 2
- 239000002674 ointment Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- DTSCLFDGIVWOGR-UHFFFAOYSA-N 1,3-dimethyl-5h-pyrido[2,3]pyrrolo[2,4-b]pyrimidine-2,4-dione Chemical compound C12=NC=CC=C2NC2=C1N(C)C(=O)N(C)C2=O DTSCLFDGIVWOGR-UHFFFAOYSA-N 0.000 description 2
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は打ち合せ電話方式に関し
、特にループ状の回線構成をとる打ち合せ電話方式に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone meeting system, and more particularly to a telephone meeting system having a loop-like line configuration.
【0002】0002
【従来の技術】従来の打ち合せ電話方式では、図2に示
すように、親局打ち合せ電話盤21の受話器22からの
打ち合せ回線25が子局231〜234を通って終端2
4で終端されている。2. Description of the Related Art In a conventional meeting telephone system, as shown in FIG.
It is terminated with 4.
【0003】0003
【発明が解決しようとする課題】この従来の打ち合せ電
話方式では、例えば、図2の子局232と子局の233
の間で打ち合せ回線25が切れると、子局233,23
4は親局と通話ができなくなるという問題点があった。[Problems to be Solved by the Invention] In this conventional meeting telephone system, for example, the slave station 232 and the slave station 233 in FIG.
When the meeting line 25 is disconnected between the slave stations 233 and 23
4 had the problem that it became impossible to talk to the master station.
【0004】0004
【課題を解決するための手段】本発明の打ち合せ電話方
式は、スイッチと、一端を親局に接続し複数の子局を順
次接続し前記スイッチを介して他端を前記親局に接続し
た打ち合せ回線と、この打ち合せ回線の回線断を検出す
る回線断検出手段と、この回線断検出手段の検出状態に
応じて前記スイッチを開閉する切替制御部とを備えてい
る。[Means for Solving the Problems] The meeting telephone system of the present invention includes a switch, one end connected to a master station, a plurality of slave stations sequentially connected, and the other end connected to the master station via the switch. A line, a line disconnection detection means for detecting line disconnection of the meeting line, and a switching control section that opens and closes the switch according to the detection state of the line disconnection detection means.
【0005】前記回線断検出手段は、前記打ち合せ回線
にパイロット信号を送出するパイロット信号送出部と、
前記打ち合せ回線を介して前記パイロット信号を受信し
前記パイロット信号を受信できなくなると受信なしの信
号を前記切替制御部へ出力するパイロット信号受信部と
を含んで構成されていてもよい。[0005] The line disconnection detection means includes a pilot signal sending unit that sends a pilot signal to the meeting line;
It may be configured to include a pilot signal receiving section that receives the pilot signal via the meeting line and outputs a signal indicating no reception to the switching control section when the pilot signal cannot be received.
【0006】[0006]
【実施例】次に本発明について図面を参照して説明する
。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.
【0007】図1は本発明の一実施例を示すブロック図
である。FIG. 1 is a block diagram showing one embodiment of the present invention.
【0008】図1において、11は親局の打ち合せ電話
盤である。12は親局打ち合せ電話盤11の受話器、1
91〜194は受話器12につながる子局である。In FIG. 1, reference numeral 11 indicates a telephone board for meetings at the master station. 12 is the handset of the master station meeting telephone board 11;
91 to 194 are slave stations connected to the receiver 12.
【0009】受話器12をハイブリッド13の中央の端
子に接続する。ハイブリッド13の両側の端子のうち一
方に打ち合せ回線18の一端を接続し、打ち合せ回線1
8により子局191〜194を順次接続する。打ち合せ
回線18の他端は、切替部17を介してハイブリッド1
3の残りの端子に接続する。[0009] The handset 12 is connected to the central terminal of the hybrid 13. One end of the meeting line 18 is connected to one of the terminals on both sides of the hybrid 13, and the meeting line 1
8, the slave stations 191 to 194 are sequentially connected. The other end of the meeting line 18 is connected to the hybrid 1 via the switching unit 17.
Connect to the remaining terminals of 3.
【0010】切替部17のスイッチは、通常、どちらも
開いている。2つのパイロット信号発生部15からパイ
ロット信号を打ち合せ回線18の双方向にのせ、2つの
パイロット信号受信部14でそれぞれ受信する。切替制
御部16はパイロット信号受信部14から受信なしの信
号をうけると、切替部17に対し対応するスイッチを閉
じる命令を出し、スイッチを閉じる。[0010] Normally, both switches of the switching section 17 are open. Pilot signals are transmitted from the two pilot signal generators 15 to both directions of the meeting line 18, and are received by the two pilot signal receivers 14, respectively. When the switching control section 16 receives a signal indicating no reception from the pilot signal receiving section 14, it issues a command to the switching section 17 to close the corresponding switch, thereby closing the switch.
【0011】[0011]
【発明の効果】以上説明したように本発明は、親局から
順次各子局を接続する打ち合せ回線の先端を、スイッチ
を介して、親局に戻し、打ち合せ回線の回線断が発生す
るとスイッチを閉じるようにしたので、打ち合せ回線上
で回線が切れても、どの子局からも親局と通話ができる
という効果を有する。Effects of the Invention As explained above, the present invention returns the end of the meeting line that sequentially connects each slave station from the master station to the master station via a switch, and when a disconnection of the meeting line occurs, the switch is turned off. Since it is closed, it has the effect that even if the line is disconnected on the meeting line, any slave station can talk to the master station.
【図1】本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
【図2】従来の打ち合せ電話方式のブロック図である。FIG. 2 is a block diagram of a conventional meeting telephone system.
11 親局打ち合せ電話盤 12 受話器 13 ハイブリッド 14 パイロット信号受信部 15 パイロット信号発生部 16 切替制御部 17 切替部 18 打ち合せ回線 191〜194 子局 11 Master station meeting telephone board 12 Telephone receiver 13 Hybrid 14 Pilot signal receiving section 15 Pilot signal generation section 16 Switching control section 17 Switching section 18 Meeting line 191-194 Slave station
Claims (2)
の子局を順次接続し前記スイッチを介して他端を前記親
局に接続した打ち合せ回線と、この打ち合せ回線の回線
断を検出する回線断検出手段と、この回線断検出手段の
検出状態に応じて前記スイッチを開閉する切替制御部と
を備えたことを特徴とする打ち合せ電話方式。1. A switch, a meeting line whose one end is connected to a master station, a plurality of slave stations are sequentially connected, and the other end is connected to the master station via the switch, and a disconnection of the meeting line is detected. A meeting telephone system comprising a line disconnection detection means and a switching control section that opens and closes the switch according to the detection state of the line disconnection detection means.
回線にパイロット信号を送出するパイロット信号送出部
と、前記打ち合せ回線を介して前記パイロット信号を受
信し前記パイロット信号を受信できなくなると受信なし
の信号を前記切替制御部へ出力するパイロット信号受信
部とを含むことを特徴とする請求項1記載の打ち合せ電
話方式。2. The line disconnection detection means includes a pilot signal sending unit that sends out a pilot signal to the meeting line, and a pilot signal sending unit that receives the pilot signal via the meeting line and detects no reception when the pilot signal cannot be received. 2. The meeting telephone system according to claim 1, further comprising a pilot signal receiving section that outputs a signal to the switching control section.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1176291A JPH04246960A (en) | 1991-02-01 | 1991-02-01 | Order telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1176291A JPH04246960A (en) | 1991-02-01 | 1991-02-01 | Order telephone system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04246960A true JPH04246960A (en) | 1992-09-02 |
Family
ID=11786991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1176291A Pending JPH04246960A (en) | 1991-02-01 | 1991-02-01 | Order telephone system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04246960A (en) |
-
1991
- 1991-02-01 JP JP1176291A patent/JPH04246960A/en active Pending
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