Siemens S30777-Q751-X telecommunications hardware (Hicom/HiPath/OpenScape PBX, SDH transmission) PBX Card / Module

The Siemens S30777-Q751-X is a CUP (Connection Unit Point) backplane for the HiPath 3350 wall-mount housing, carried forward as a backplane component of the OpenScape Business X3W System Box. CUP is the connection hub the system’s other cards plug into inside the wall-mount chassis, distinct from the CUC (Connection Unit Com) backplane used in the equivalent HiPath 3550 wall housing and from the rack-mount CUPR and CUCR backplanes used in the HiPath 3300 and HiPath 3500 chassis respectively. Because a backplane is the physical foundation every other card in the chassis connects to, a fault here typically takes the whole cabinet out of service rather than a single card’s worth of capacity, making it one of the more consequential boards to source correctly rather than a routine line-card swap. Genuine Siemens backplanes of this kind remain a routine requirement for operators maintaining wall-mount HiPath 3350/OpenScape X3W chassis. Confirm the exact chassis type (wall-mount, not rack) before ordering. Tech-Star is UK-based and ships worldwide; contact our sales team for current stock and pricing.