Avaya TN753B-R Direct Inward Dialing Trunk

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"Avaya TN753B The Avaya TN753B is a Direct Inward Dial (DID) trunk circuit card. It has 8 ports used for immediate start and wink start. Each port has tip and ring signal leads. TN753B Features: T1 Trunk Card, 8 Ports per Card, Required to Support Brazil Block Collect Call, Tip & Ring Signal Leads"

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