Panasonic KX-FP85 Service Manual

Also see for KX-FP85: Operating instructions Service manual

Contents

6.9. ITS (Integrated telephone System) and MONITOR SECTION6.9.1. GENERALThe general ITS operation is performed by the special IC505 which has a handset circuit. The alarm tone, the key tone, and thebeep are output from the ASIC IC501 (digital board). During the pulse dial operation, the monitor tone is output from the ASICIC501.6.9.2. SPEAKER PHONE CIRCUIT1. FunctionThe circuit controls the automatic switching of the transmitted and received signals, to and from the telephone line, when theunit is used in the hands-free mode.2. Circuit OperationThe speakerphone can only provide duplex.3. Signal pathRefer to 2.3.7.1 CHECK SHEET(P.76).6.9.3. HANDSET CIRCUIT1. FunctionThis circuit controls the conversation over the handset, i.e. the transmitted and received voices to and from the handset.2. Signal pathRefer to 2.3.7.1 CHECK SHEET(P.76).6.9.4. MONITOR CIRCUIT FOR EACH SIGNALS1. FunctionThis circuit monitors various tones, such as 1 DTMF tone, 2 Alarm/Beep/Key tone/Bell 3 Dummy ring back tone.2. Signal pathRefer to 2.3.7.1 CHECK SHEET(P.76).6.10. ATAS (Automatic Telephone Answering System) SECTION1. FunctionThe ATAS main operation is performed by the special IC505 (MODEM). IC512 (FLASH MEMORY)´s control signals are inputfrom ASIC IC501.a. Greeting/Message Recordingb. ICM Recordingc. Greeting/Message/ICM play to speakerd. Greeting/Message/ICM play to Tel Linee. Vox Detection2. Signal PathRefer to 2.3.7.1 CHECK SHEET(P.76).172KX-FP85