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Verticall 
Definity
Definity Circuit Packs
Definity TN744B
Avaya Definity TN744B circuit packs are available through Verticall Communications. TN744B has eight tone detectors used in vector prompting, outgoing call management (OCM), and call prompting applications. For more information regarding Avaya Definity TN744B circuit packs, contact us by calling 866.459.2255.
$150