ALCATEL 3AL78856BCAE -Lucent 1660SM L-4.1N Telecom System Card / Module

The Alcatel-Lucent 3AL78856BCAE is an L-4 series STM-4 optical port card for the Alcatel-Lucent 1660SM SDH transmission platform, a metro and regional transport system supporting speeds up to STM-64. Cards in the 3AL78856B family provide the STM-4 optical line interface for the 1660SM shelf, terminating a long-haul STM-4 optical signal and passing the demultiplexed traffic into the shelf’s cross-connect matrix for onward routing to tributary cards; different optical module variants within the family cover different reach classes and connector types (FC/PC, SC/PC, LC). The 3AL78856B base part number is a confirmed 1660SM STM-4 line card family, with several documented sibling variants (including the BE-suffix L-4.2N long-haul cards) sharing the same board and function. This unit carries the CAE revision suffix. It is commonly sourced as a tested pull for maintaining an existing 1660SM STM-4 ring or provisioning spares where new-build SDH hardware is no longer manufactured. Tech-Star (UK-based, shipped worldwide) stocks tested Alcatel-Lucent 1660SM line, matrix and power cards; contact our engineers to confirm the exact optical module/reach variant needed for your ring before ordering.