The Sampo HT‑B905HL telephone offers caller‑ID display, DTMF/FSK signal reception, and various user‑adjustable functions such as pause, temporary cut, volume control, and anti‑theft settings. The manual describes the device’s features, specifications, and how to use functions like music hold, speed‑dial, and screen brightness adjustment.
Installation steps, power requirements, battery handling, and safety precautions are covered, followed by detailed troubleshooting guidance, service contact information, and procedures for setting date, time, local and outgoing codes, and other configurable options. This manual is written in Chinese.
| Rated voltage | 4.0 V |
|---|---|
| Power consumption | 90 mW |
| High‑frequency DTMF groups | 1209 Hz, 1336 Hz, 1477 Hz, 1633 Hz |
| Low‑frequency DTMF groups | 697 Hz, 770 Hz, 852 Hz, 941 Hz |
Remove the battery, wait about 30 seconds, then reinstall it with the correct polarity before powering the phone back on.