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Verticall 
Definity
Definity Circuit Packs
Definity TN744D
Avaya Definity TN744D circuit packs are available through Verticall Communications. The Definity TN744D Call Classifier provides eight ports of tone detection, and supports digital signal processing of PCM signals. The Avaya TN744D supports the functions of the TN744C, plus call classifier options for other countries. For more information regarding Avaya Definity TN744C circuit packs, contact us by calling 866.459.2255.
$195