ALCATEL 3AL78856BEAD -Lucent 1660SM L-4.2N Telecom System Card / Module

The Alcatel-Lucent 3AL78856BEAD is an L-4.2N long-haul 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. The L-4.2N card provides a long-haul STM-4 optical line interface, available across FC/PC and SC/PC connector variants depending on the specific part number within the 3AL78856BE family, and terminates STM-4 optical signals for onward routing through the shelf’s cross-connect matrix to tributary cards. The 3AL78856BE base part number is confirmed as the L-4.2 long-haul port card variant for the 1660SM platform, distinct from the shorter-reach L-4.1N cards in the sibling 3AL78856BC range. This unit carries the AD revision suffix. It is commonly sourced as a tested pull for maintaining an existing 1660SM long-haul 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 connector/reach variant needed for your ring before ordering.