Alcatel 3AL34731AA STM-1 Bi-Tributary Interface Module is a hardware interface card that provides two bi-tributary interfaces for an STM-1 transport path in SDH networks. It is used to connect two tributary signals into an STM-1 frame on Alcatel equipment, enabling efficient aggregation of data streams for STM-1 service delivery. Part number 3AL34731AA identifies this STM-1 bi-tributary interface module within Alcatel's product lineup.
