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Verticall 
Definity
Definity Phones 7400 Series
The Avaya 7400 series telephones are extremely solid and reliable phones. The Definity 7400 series includes the Avaya 7406D phone and the Avaya 7444D phone. Verticall specializes in Avaya phones, including the Avaya 7400 series. For more information about the Avaya 7400 series telephones, please contact Verticall at 866.459.2255.