1. Loop: 5
2. Telephone sets should be TONE dialing only.
3. CO Dialing Tone - continuous
Internal Dialing Tone - continuous (450 Hz)
Internal Ring Back Tone - 1 sec. ON, 4 sec. OFF (450 Hz)
Internal Busy Tone - 0.35 sec. ON, 0.35 sec. OFF (450 Hz)
Internal Confirm Tone - 1 sec. ON (450 Hz)
4. Power : 120V / 220V
