Alcatel-Lucent 3AL34349AAAD legacy SDH/PDH transmission Telecom System Card / Module

The Alcatel-Lucent 3AL34349AAAD is a 75-ohm synchronisation interface adapter used within Alcatel-Lucent’s legacy PDH/SDH transmission shelf families. Synchronisation adapters of this kind take an external timing reference, typically a 2.048 MHz or 2 Mbit/s sync signal, and adapt it to the 75-ohm unbalanced impedance the shelf’s internal timing distribution expects, letting the transmission shelf lock to a site or network timing source such as a building integrated timing supply. Accurate synchronisation is essential in SDH networks to avoid slips and errors as traffic crosses shelf boundaries, and dedicated adapter cards such as this one are a standard part of keeping that timing chain intact. As a compact plug-in module, the 3AL34349AAAD is field-replaceable and can be swapped during a maintenance window without disturbing the rest of the shelf. Tech-Star (UK-based, shipped worldwide) supplies tested Alcatel-Lucent legacy transmission spares including this synchronisation adapter. Contact us to confirm shelf compatibility before ordering.