JPS6433252U

JPS6433252U -

Info

Publication number: JPS6433252U
Application number: JP12640387U
Authority: JP
Priority date: 1987-08-21
Filing date: 1987-08-21
Publication date: 1989-03-01

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示すブロツク図
、第２図は第１図に示す装置の動作を示すフロー
チヤート、第３図はダイヤル処理のフローチヤー
ト、第４図はタイマ処理のフローチヤートである
。１……電話交換機、２……ＰＢ外線、４……通
話線、５_１〜５_ｎ……電話機、６……保留音源回
路、７……着信検出回路、９……ループ検出回路
、１０……フオトサイリスタ、１１……呼出信号
音回路、１２……リードリレー、１３……内線呼
出音回路、１４……ＰＢレシーバ回路、１６……
機能設定回路、１７……マイクロプロセツサ、２
０……ドアホン、２１……ドアホン通話回路。 Fig. 1 is a block diagram showing an embodiment of this invention, Fig. 2 is a flowchart showing the operation of the device shown in Fig. 1, Fig. 3 is a flowchart of dial processing, and Fig. 4 is a flowchart of timer processing. It's a chat. DESCRIPTION OF SYMBOLS 1... Telephone exchange, 2... PB outside line, 4... Call line, 5 ₁ to 5 _n ... Telephone, 6... Hold sound source circuit, 7... Incoming call detection circuit, 9... Loop detection circuit, 10... ...Photothyristor, 11... Ringing signal tone circuit, 12... Reed relay, 13... Extension ringing circuit, 14... PB receiver circuit, 16...
Function setting circuit, 17...Microprocessor, 2
0... Door phone, 21... Door phone call circuit.

Claims

[Scope of Claim for Utility Model Registration] Accommodating a PB dial standard telephone via a PB outside line and a pair of call lines, and transmitting a hold melody by putting the outside line on hold during an outside call by performing a hold operation on the standard telephone during an outside call. In a telephone exchange device that performs
a PB dial detection means for detecting a dial operation; a timer started by the output of the hooking detection means; When the hold dial output of the PB dial detection means occurs while the timer is operating, the hold state is continued to be set as a regular hold, and when the hold dial output does not occur during the timer operation, the temporary hold state is canceled. A telephone switching device comprising a control means.