Marconi Ericsson 1HAM60576AAX Marconi/Ericsson SMA/OMS/MSH86 SDH transmission systems Optical Transmission Module

The Marconi Ericsson 1HAM60576AAX is a 2Mbit/s unbalanced Line Termination Unit for the Marconi SMA SDH multiplexer range, terminating an E1 tributary circuit over the unbalanced 75-ohm coaxial interface standard used across most of Europe rather than the balanced 120-ohm twisted-pair option. It is functionally the same class of card as the Type 43 2Mbit/s LTU covered elsewhere in this listing, terminating tributary traffic at the shelf’s plug-in card positions alongside optical aggregate units, a system controller and alarm cards. SMA nodes carry a mix of these tributary-rate LTUs depending on how many E1, E3/DS3 or higher-rate circuits a given site needs to drop, and a card failure takes only that circuit offline rather than the whole shelf. SMA equipment, inherited via GPT and Plessey before Marconi sold its transmission business to Ericsson in 2006, remains in service on UK utility, rail and private networks. Confirm the exact host shelf and tributary assignment before ordering. Tech-Star (UK-based, shipped worldwide) stocks Marconi Ericsson SMA components to support ongoing network maintenance projects.