The Avaya 6400 Series Digital Voice Telephones deliver the right combination of business communication functionality. Usability features are readily available, for example, you can personalize your phone with programmable buttons; choose from a selection of convenient features.

What's New With This Release

The Avaya 6424D Display Voice Terminal is the latest addition to the portfolio.

Business Benefits

• User programmability
• Global user interface
• Expandability
• "Plug and play" installation
• Wall mountable


User programmability

Your employees can easily program the buttons on their telephones by choosing from a selection of convenient features.
Telephones can be customized to help enhance productivity.


You can expand your 16- or 24-button telephone with an additional 24-button expansion module.
Can expand to adapt to business needs.

"Plug and play" installation

Every 6400 telephone arrives at your business quality-tested and ready for use.
Ensures maximum reliability.

Wall mountable

Stand on each telephone can be reversed for easy mounting on any wall.
Greater flexibility in support of varied work environments.

Automatic Station Relocation

Because there is no need to change station wiring or cross connects, your office staff can move telephone sets around without the help of a technician. Requires Avaya Call Processing Release 9.5 and a 6400 Serialized labeled telephone set.
Saves you time and money for everyday moves, adds and changes.


Telephone has a built-in self-diagnostic capability.
Reduces downtime and minimizes your need for technical assistance.

Advanced administration screens

Sophisticated displays typically found in more elaborate systems.
Enhanced user experience.