Sampo CT-B503ML Telephone User Manual

About this manual

This manual explains how to install and power the CT‑B503ML telephone system, including connecting the base unit to a DC9 V 200 mA supply and charging the handset with a 3.6 V 280 mAh battery. It covers basic functions such as dialing, DTMF/FSK signaling, and special features like anti‑theft, LCD brightness, and custom key tones.

Detailed instructions are provided for configuring local numbers, long‑distance prefixes, date and time settings, and for using the charging dock. The troubleshooting section lists common problems, battery care, and service contact information. This manual is written in Chinese.

What's inside

• Installation and Power Requirements
• Charging Dock Usage
• Function Settings (Anti‑theft, LCD Brightness, Key Tones)
• Long‑Distance and Local Number Configuration
• Date and Time Setup
• Troubleshooting and Service Information

Specifications

Frequently asked questions

How long should the handset be charged before first use?

Charge the handset for at least 12 hours before the first use.

What should I do if the handset battery is low?

Place the handset on the charging dock until the charging indicator lights up; replace the battery only with a compatible 3.6 V 280 mAh unit.