Siemens S30810-Q2031-X telecommunications hardware (Hicom/HiPath/OpenScape PBX, SDH transmission) PBX Card / Module

The Siemens S30810-Q2031-X is an SIU (Signaling Unit) board for the Hicom 300 system, fitted in both the central and peripheral frames of the switch. The Signaling Unit handles the signalling functions the Hicom 300’s switching architecture depends on to coordinate calls between the central control and the peripheral line/trunk shelves, sitting at a more structural level in the system than a peripheral line card. Siemens later documented a SIUX2 board as the specified replacement part for this role, so a system already running SIUX2 would want that part rather than the original SIU when sourcing a spare, and confirming which generation your frame takes is worth doing before ordering. As a central signalling component rather than an extension-facing card, its failure affects the switching fabric itself rather than a specific set of ports. Hicom 300 systems ran large corporate and public-sector sites across Europe for two decades, and many are still working, maintained board by board rather than replaced outright. Tell us the exact frame and generation this is going into. Tech-Star is UK-based and ships worldwide; contact our sales team for stock, condition and pricing.