Alcatel-Lucent 3AL89585AA SDH transmission chassis Telecom System Card / Module

The Alcatel-Lucent 3AL89585AA is an SDH Sync Adapter, a timing and synchronisation interface card built for Alcatel-Lucent’s SDH transmission chassis. It presents a 75 ohm unbalanced coaxial synchronisation interface, the impedance ITU-T G.703 specifies for 2MHz and 2Mbit/s timing references, and provides the physical connection for feeding an external building-integrated timing supply into the chassis’s synchronisation subsystem. The catalogue string carried on this card reads 750HM, which is a run-together rendering of 75 OHM rather than a model number, so it is worth searching both forms when matching a spare. Keeping a node locked to an external reference is what stops pointer adjustments and timing slips propagating around an SDH ring, which makes sync adapters a routine spare for operators maintaining timing redundancy or recovering from a sync-path fault. Specifiers should confirm exact chassis and timing-architecture compatibility before ordering. Tech-Star (UK-based, shipped worldwide) stocks components to support ongoing network maintenance projects. Please contact our sales team for current stock and pricing.