Adtran D4UBR1 1102020L2 Network Interface Card

The Adtran 1102020L2 U-BRITE II D4-UBR1 ISDN interface module is a plug-in card for Adtran’s U-BRITE II family that provides a D4 ISDN interface for BR1/8 multiplexers. Identified by part number 1102020L2, this module is designed to be mounted in the U-BRITE II backplane and used with BR1/8 ISDN networks to terminate and route ISDN traffic within a channel-bank configuration. As part of the U-BRITE II lineup, the D4-UBR1 card serves as the ISDN interface component in BR1/8 deployments, enabling an integrated, card-based ISDN solution within ADTRAN’s channel-bank systems. Common applications include enterprise networks that rely on BR1/8 ISDN services and seek to consolidate ISDN interfaces in a modular U-BRITE II chassis, providing a compact interface option for legacy ISDN connectivity.