Avaya TN556B-R ISDN-BRI 4-Wire Interface

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"Avaya TN556B The Avaya TN556B is an ISDN BRI four wire interface. It provides 12 ports connecting to ISDN-BRI terminals each port has TXT, TXR, PXT, and PXR signal leads. Each port operates at 192 kbps and has 2 B-channels and 1 D-channel. The TN556B has range up to 3300 ft. maximum from the system to the voice terminal and connect 24 terminals where each terminal uses 1 B-channel and shares the D-channel. It is compatible with definity R7 or later. TN556B Features: ISDN BRI 4-Wire Interface, Each Port has TXT, TXR, PXT & PXR Signal Leads, Range Up To 3300 ft. From System To Voice Terminal, Each Port Operates At 192 kbps, 12 Ports Connecting To ISDN-BRI Terminals, Compatible w/ Definity R7 or Later"

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