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KX-FT931LA-B
12.5.6.2. Defective ITS (Integrated Telephone System) Section
1. No handset and monitor transmission / reception
Following the ITS section or NCU section, search for the route between the microphone and the telephone line (sending) or
between the telephone line and the speaker (receiving) where the signal disappears.
Check the components at that point.
2. No pulse dialing
3. No ring tone (or No bell)
4. No tone dialing
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