User manual for AT&T EL31109/EL31209/EL31309/EL31409 2.4 GHz digital cordless phone, covering installation, settings, operation and safety.
This manual provides step‑by‑step instructions for installing the base unit and handset, connecting power and DSL filters, and positioning the phone for optimal signal coverage. It also explains how to charge the handset, replace the Ni‑MH battery, and use the provided accessories.
Detailed sections cover menu navigation, date‑time configuration, ringtone selection, phone book management, call handling (including internal, external, three‑way, and call transfer), and troubleshooting. Safety warnings, environmental information, and full technical specifications are included at the end of the document. This manual is written in Chinese.
| Handset dimensions | 155 × 46 × 30 mm |
|---|---|
| Base unit dimensions | 135 × 102 × 67 mm |
| Handset weight | 115 g (with battery) |
| Base unit weight | 130 g (without adapter) |
| Power consumption (base) | 1.8 W |
| Indoor effective range | ≤ 50 m |
| Outdoor effective range | ≤ 300 m |
| Operating temperature | -10 °C ~ 40 °C |
| Relative humidity | 10 % ~ 95 % |
| RF transmit power (handset) | ≤ 25 mW |
| Frequency band | 2.4 GHz (95 channels) |
| Modulation | GFSK |
| Handset battery type | 2‑cell 500 mAh Ni‑MH rechargeable |
The handset uses a proprietary 2‑cell 500 mAh rechargeable nickel‑metal‑hydride (Ni‑MH) battery.
The indoor effective range is up to 50 meters.