Introduction
This manual provides essential instructions for the setup, operation, and maintenance of your VTech DS6401 Accessory Cordless Handset. This handset is designed to expand your existing VTech DS6421 or DS6422 Expandable Phone System. It features DECT 6.0 digital technology, ensuring clear communication.

Image: The VTech DS6401 Accessory Cordless Handset, black, shown in its charging cradle. The handset features a digital display, navigation buttons, and a numeric keypad.
Package Contents
- One VTech DS6401 Accessory Cordless Handset
- One Handset Battery Compartment Cover
- One Rechargeable Battery Pack
- One Handset Charger with Power Adapter
Setup
1. Battery Installation
- Locate the battery compartment on the back of the handset.
- Open the battery compartment cover.
- Connect the rechargeable battery pack plug securely into the jack inside the compartment.
- Place the battery pack with the label THIS SIDE UP facing up.
- Replace the battery compartment cover, ensuring it clicks into place.
2. Charging the Handset
- Plug the small end of the power adapter into the power jack on the back of the handset charger.
- Plug the large end of the power adapter into a standard electrical outlet.
- Place the handset in the charger with the display facing forward. The CHARGE light on the handset will illuminate, indicating it is charging.
- Allow the handset to charge for at least 16 hours before initial use. For optimal battery performance, keep the handset in the charger when not in use.
3. Registering the Handset
The DS6401 is an accessory handset and must be registered to a VTech DS6421 or DS6422 expandable phone system base unit to function. Refer to your main system's user manual for specific registration instructions. Generally, this involves placing the handset in the base unit's charger and pressing a registration button on the base unit.
Operating Instructions
Making and Receiving Calls
- To Make a Call: Press PHONE or SPEAKER, then dial the number.
- To Answer a Call: Press any dialing key (0-9, #, *), PHONE, or SPEAKER.
- To End a Call: Press OFF/CANCEL or place the handset in the charger.
Volume Control
During a call, press VOL+ or VOL- on the side of the handset to adjust the listening volume.
Intercom Function
To use the intercom feature between handsets, press INT and then the number of the desired handset. This feature is dependent on your main system's capabilities.
Caller ID
The handset display will show caller ID information if you subscribe to this service. The system may also announce caller ID information, depending on your main system's settings.
Maintenance
Cleaning the Handset
Clean the handset and charger with a soft, damp cloth. Do not use cleaning sprays or liquid cleaners. Avoid getting moisture into any openings.
Battery Care
- Use only the supplied rechargeable battery pack.
- Do not dispose of batteries in a fire. They may explode.
- Do not open or mutilate the battery. Released electrolyte is corrosive and may cause burns or injury to the eyes or skin. It may be toxic if swallowed.
- To prevent fire or shock hazard, do not expose this product to water or any type of moisture.
Troubleshooting
| Problem | Solution |
|---|---|
| Handset does not turn on or has no display. | Ensure the battery pack is correctly installed and fully charged. Place the handset in the charger for at least 16 hours. |
| No dial tone. | Verify the handset is registered to the base unit. Check the main phone line connection to the base unit. |
| Poor sound quality or static. | Move closer to the base unit. Ensure no large metal objects or other electronic devices are interfering with the signal. |
| Cannot register handset. | Ensure the handset is within range of the base unit. Follow the registration steps in your main system's manual precisely. You may need to deregister other handsets if the system has reached its maximum capacity. |
Specifications
- Model: DS6401
- Technology: DECT 6.0 Digital
- Dimensions: 5.1 x 8.5 x 3.3 inches (Product Dimensions)
- Weight: 1 pound (Item Weight)
- Batteries: 1 AAA rechargeable battery required (included)
- Material: Plastic
- Color: Black/Silver
- Compatibility: Requires VTech DS6421 or DS6422 Expandable Phone System to operate.
Warranty Information
VTech products are designed to be reliable and provide years of enjoyment. For detailed warranty information, please refer to the warranty card included with your main VTech phone system (DS6421 or DS6422) or visit the official VTech website. Typically, VTech offers a limited warranty covering defects in materials and workmanship under normal use.
Support
For technical support, product registration, or to download a full version of the user manual for your complete system, please visit the VTech support website or contact VTech customer service. Contact information can usually be found on the VTech official website or in the documentation provided with your main phone system.
VTech Official Website: www.vtechphones.com





