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Avaya Definity TN556 BRI ISDN Line Circuit Card V1 (TN556DV1) Refurb

Avaya Definity TN556 BRI ISDN Line Circuit Card V1 (TN556DV1) Refurb

Avaya (Avaya Red)

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Provides 12-ports connecting to ISDN-BRI terminals. Each port uses TXT TXR PXT PXR signal leads and ranges up to 3300 feet maximum from the system to the voice terminal.

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