S30810-Q2217-X10 Siemens HiPath/Hicom PBX Expansion Card

The Siemens S30810-Q2217-X10 is an STMD3 (Subscriber Trunk Module Digital) card designed for use in Siemens HiPath and Hicom private branch exchange systems. This module provides digital trunk interface functionality, enabling connection between the PBX and external digital telephone networks.

The STMD3 card is typically deployed in enterprise telephony environments where organisations require reliable digital trunk connectivity for voice communications. It integrates with the Siemens communication platform to handle incoming and outgoing call traffic through digital circuits.

This is a legacy product from the Siemens enterprise communications portfolio, which was subsequently acquired by Unify (now part of Atos). While these systems are no longer in active manufacture, they remain in service across many established installations requiring ongoing maintenance and expansion support.

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