This SMS668 user manual explains setup, keypad functions, messaging, phonebook, network services, and troubleshooting for the color‑screen wireless…
The SMS668 is a next‑generation color‑screen wireless fixed‑line SMS telephone that uses 2.4 GHz frequency‑hopping to send and receive short messages and broadcast information. It includes a 65,000‑color backlit LCD, multiple message mailboxes, and a built‑in phonebook.
The manual provides step‑by‑step instructions for preparing the device, connecting power and telephone lines, operating the keypad, using messaging features, configuring network services, and troubleshooting common problems. Technical specifications of the handset and base unit are also listed. This manual is written in Chinese.
| Frequency range | 400 – 483 GHz |
|---|---|
| Number of channels | 94 channels |
| Frequency stability | < ±50 kHz |
| Battery standby time | 100 hours |
| Handset talk time | 5 hours |
| Hands‑free talk time | 3 hours |
| Charging time | 10 hours |
| Weight | Main unit 50 g, Handset 130 g |
| Dimensions | Main unit 65 × 155 × 95 mm, Handset 137 × 49 × 16 mm |
| Power supply (base) | DC 9 V, 700 mA |