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Verticall 
Definity
Definity Telephones 6400 Phones
The phones in the Avaya Definity 6400 series are very reliable. The Definity 6400 series includes the Definity 6402, 6402D, 6408+, 6408D+, 6416D+, 6416D+M, 6424D+, 6424D+M, and XM24 phone. Verticall Communications specializes in Avaya phones, including the Definity 6400 series. For more information about the Avaya 6400 series telephones, please contact us at 866.459.2255.
Avaya Definity 6400 Phones:
- 6402 phones
- 6402D phones
- 6408+ phones
- 6408D+ phones
- 6416D+ phones
- 6416D+M phones
- 6424D+ phones
- 6424D+M phones
- XM24 phones