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9.7. Bell Ringing Problem and Volume Level Problem
When Ringer Pattern or Volume Level are not the default setting, please follow steps 1 to 5.
1. Remove the telephone line from the unit.
2. Short VDD and VSS with lead wire. (See Fig.1)
3. Plug into the telephone line.
4. Lift the handset off the unit, and confirm to hear the tone dialing. Then hang up the handset
on the unit (ON-HOOK).
5. Send the Bell signal to the unit (Making a call), and confirm it normal call.
<Fig.1>
10. BLOCK DIAGRAM
11. OPTION JUMPER TABLE
9
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