PURPOSE:To switch the status of a telephone set to the loudspeaking of received speech by using a non-lock type switch as a line switch and operating said line switch by a self-lock type operation button interlocking with a hook button so that the telephone set is kept at the holding ...
PURPOSE:To switch the status of a telephone set to the loudspeaking of received speech by using a non-lock type switch as a line switch and operating said line switch by a self-lock type operation button interlocking with a hook button so that the telephone set is kept at the holding sta...
Hook conditions of a handset of a telephone apparatus which includes a telephone apparatus base having an inside and an outside are sensed by providing a beam of radiation outside of that telephone apparatus base. The handset is placed in that beam of radiation outside the telephone apparatus ...
PURPOSE:To automatically release a line close state even if the on-hook dial switch of a telephone set is unconsciously or erroneously turned on, by connecting a timer circuit and a switch circuit, which is controlled by the output of this timer circuit, in parallel with the on-hook dial ...
In case of the hook-off, a switch 1 is turned on and a telephone line is closed. A microcomputer 8 uses an internal counter to turn off a switch 4 by 100musec for each 10msec, thereby cutting off a signal from a speaker phone microphone 5. Then the signal state at the switch 4 ...
In one embodiment, a needle is configured for extending t... G Bates,H Brown,C Niebel,... 被引量: 0发表: 2015年 TELEPHONE LINE ON-HOOK EVENT DETECTOR A ring detect/Caller I.D. detect circuit employs first and second operational amplifiers supplied with a differential input from the AC ...
A power line telephone communications system having an ON HOOK digital voiceband messaging feature by which selected information contained in an incoming call to a telephone is received prior tc the telephone being lifted off its hook. The incoming ring signals, ON HOOK digital voiceband messaging an...
1.To suspend on a hook or hanger. 2. a.To replace (a telephone receiver) on its base or cradle. b.To end a telephone conversation. 3.To delay or impede; hinder:Budget problems hung up the project for months. 4.To become halted or snagged:The fishing line hung up on a rock. ...
ON-HOOK/OFF-HOOK DETECTOR CIRCUIT A detector circuit stall / hook (10) is included in a telecommunication integrated circuit. A power signal TONE GENERATOR (V) is controlled in the form of state signal to determine when a telephone hook switch is either in an off-hook co... DH Louis 被...
TELEPHONE LINE ON-HOOK EVENT DETECTOR A ring detect/Caller I.D. detect circuit employs first and second operational amplifiers supplied with a differential input from the AC side of a diode bri... TG Beutler,R Rahamim,F Sacca 被引量: 0发表: 2001年 Method for monitoring and reporting events...