This user manual explains how to install and configure the Sanyo TEL521 wired telephone, including battery installation, setting the date/time, ringtone volume, and IP functions. Detailed step‑by‑step procedures are provided for each function.
Safety warnings, troubleshooting tips, and service information are included to help users avoid damage and ensure reliable operation of the telephone. This manual is written in Chinese.
| Power source | Three 9 V batteries |
|---|
Open the battery compartment and replace the three 9 V batteries with new ones.