This manual describes the features and functions of the BBK cordless telephone, including its dual‑mode FSK/DTMF caller ID, multiple ringtone options, LCD display settings, and battery‑powered handset operation. Detailed installation steps cover connecting the base unit to the power transformer and, for ADSL users, the required voice‑separation equipment.
Operating instructions cover making and receiving calls, pairing handsets, adjusting LCD brightness, setting date/time and alarms, and using three‑way conference calls. The troubleshooting section lists common problems such as no ringing, static noise, and handset battery issues, with recommended checks and solutions. This manual is written in Chinese.
| Base unit transmit power | <20 mW |
|---|---|
| Handset transmit power | <20 mW |
| Operating temperature range | -10 °C to 80 °C |
| Relative humidity range | 10 %–95 % |
| Operating frequency | 45/48 MHz (20 channels) |
| Modulation method | Frequency modulation (FM) |
| Base unit hands‑free max undistorted power | >90 mW |
| Ringtone sound level (handset) | >55 dB(A) |
Verify that the wiring connections are secure and that the telephone line is not broken, and make sure the handset is not set to Do‑Not‑Disturb mode.
Static may be caused by improper antenna placement, strong external interference, or low handset battery; extend the antenna, reduce distance to the base, or recharge the handset battery.