This manual describes the CT‑W20L telephone’s specifications, including power requirements (DC 9 V / 200 mA, 1.5 W), dimensions, weight (130 g main unit, 90 g handset), DTMF/FSK signaling details, and transmission power (10 mW). It also covers installation steps such as connecting the base to the telephone line and charging the handset battery.
The guide explains how to configure time and date, set security lock codes, adjust volume and tone settings, and perform routine cleaning and maintenance. Troubleshooting tips address common issues like battery problems, signal interference, and device malfunction, with safety warnings for abnormal conditions. This manual is written in Chinese.
| Power supply | DC 9 V / 200 mA, 1.5 W |
|---|---|
| Main unit weight and size | 130 g, 100 mm × 50 mm × 122 mm |
| Handset weight and size | 90 g, 46 mm × 24 mm × 163 mm |
| DTMF frequency error | ≤ 1.5 % |
| Transmission power | 10 mW |
| DTMF frequencies | 1209/1336/1477 Hz (high), 97/770/852/941 Hz (low) |
Insert the handset into the charging base; the charging indicator light will illuminate while charging.
While the phone is in standby, hold the X key, press the lock key, and follow the prompts to enter a new numeric code.
Use a soft, dry cloth to wipe the unit; do not use cleaning solvents or abrasive materials.