Panasonic KX-NS700 Feature Manual page 295

The dial tone type for the ARS feature can be selected separately. If "Type A" is selected for the ARS, dial
tone 1A will be heard. If "Type B" is selected, dial tone 1B will be heard.
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Dial Tone Patterns
All dial tone patterns have a default (® 6.2.1 Tones/Ring Tones).
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Only dial tone 1 is sent to the extensions in a VM (DPT/DTMF) group (2.28.1 Voice Mail (VM) Group).
PC Programming Manual References
10.9 PBX Configuration—[2-9] System—System Options—Option 3
→ Dial Tone—Distinctive Dial Tone
→ Dial Tone—Dial Tone for Extension
→ Dial Tone—Dial Tone for ARS
2.25.1 Dial Tone
Feature Manual 295