Siemens S30777-Q750-X telecommunications hardware (Hicom/HiPath/OpenScape PBX, SDH transmission) PBX Card / Module

The Siemens S30777-Q750-X is a CUC (Connection Unit Com) backplane for the HiPath 3550 wall-mount housing, also fitted into the equivalent OpenScape Business X3W System Box. CUC is the connection hub the system’s other cards plug into inside the wall-mount chassis, the counterpart in this pair to the CUP (Connection Unit Point) backplane used in the smaller HiPath 3350 wall housing, with CUCR and CUPR serving the equivalent role in the HiPath 3500 and HiPath 3300 rack-mount chassis respectively. As a backplane rather than a peripheral card, a fault here takes the whole chassis out of service, since every other board in the cabinet depends on it for power and signal distribution, making correct sourcing more consequential than a routine line-card swap. Genuine Siemens backplanes of this kind remain a routine requirement for operators maintaining wall-mount HiPath 3550/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.