S42024-D5091-A100-15 Siemens HiPath 3000/4000 PBX Expansion Card

The Siemens S42024-D5091-A100-15 is an E155P-4 interface card designed for Siemens HiPath telecommunications systems. This board provides E1 trunk connectivity, enabling digital voice and data transmission over standard 2.048 Mbps E1 lines commonly used in European telecommunications infrastructure.

The E155P-4 card is engineered for installation in Siemens HiPath 3000 and HiPath 4000 series PBX platforms, where it facilitates connections to ISDN primary rate interfaces (PRI) or direct trunk links to public switched telephone networks and private tie lines between enterprise sites.

This is a legacy product from the Siemens telecommunications portfolio, which has since transitioned through the Siemens Enterprise Communications and Unify brand evolutions. The card remains relevant for organisations maintaining existing HiPath infrastructure or requiring compatible spares for ongoing system support.

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