Avaya Definity TN573B Switch-Node Interface (Refurbished)

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Avaya Definity TN573B Switch-Node Interface for r. More Information Routes circuit, packet, and control messages Installed in a SN carrier in a CSS that terminates a fiber optic li nk from a SNI in another SN carrier, and EI in a PPN, and an EI in an EPN One TN573B is used per PN and supports the TN574 DS1 converter circuit pack TN573B and higher provides an interface to the single-mode fiber optic transceiver and supports the TN1654 and TN574 DS1 converter circuit pack Show more