SIEMENS S30810-Q814-X EWSD (Elektronisches Waehlsystem Digital) digital switching exchange Telecom System Card / Module

The Siemens S30810-Q814-X is an internal subrack card belonging to the S30810/S30813/S30050 Q-numbered part family used across the Siemens EWSD (Elektronisches Waehlsystem Digital) digital switching exchange, a widely installed German-designed telephone exchange system introduced in 1975 and produced until 2017, still maintained in service at many operators worldwide today. Reseller and parts-recycler listings independently confirm this exact part number as a genuine EWSD-family board, consistent with the wider numbering range covering the Coordination Processor (CP), Common Channel Network Control (CCNC), Line Trunk Group (LTG), Digital Line Unit (DLU), Switching Network (SN) and ISDN Primary Access Unit (PH) subsystems that make up an EWSD exchange. The specific card-level function within these subsystems is not independently documented beyond the family and part-numbering confirmation, so this listing states the confirmed platform rather than guessing at a precise subsystem role. Tech-Star (UK-based, shipped worldwide) supplies tested Siemens EWSD subrack cards; contact our engineers to confirm the exact function and compatibility for your specific exchange configuration before ordering.