S30810-Q2913-X300-2 Siemens HiPath 3550 PBX Expansion Card

The Siemens S30810-Q2913-X300-2 is an S2M trunk module card designed for use with the Siemens HiPath 3550 private branch exchange system. This card provides ISDN Primary Rate Interface (PRI) connectivity, enabling the PBX to interface with external ISDN trunk lines for voice and data communication.

The S2M trunk module is installed within the HiPath 3550 system to deliver high-capacity digital trunk connections, typically supporting up to 30 simultaneous B-channels for voice traffic. This makes it suitable for small to medium-sized enterprise telephony deployments requiring robust ISDN connectivity to the public switched telephone network.

The HiPath 3550 is a legacy PBX platform from Siemens, now part of the Unify portfolio following corporate restructuring. While the system is no longer in active production, it remains deployed in many business environments, and replacement components are in ongoing demand for maintenance and system continuity.

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