ROF1575114/2 Ericsson Ericsson MD110 PBX Expansion Card

The Ericsson ROF1575114/2 is an ELU-A2 Extension Line Unit designed to provide analogue extension connectivity within Ericsson MD110 and BusinessPhone PBX systems. This particular variant supports 16 message waiting indicator (MWI) circuits, enabling visual or audible notification on connected analogue telephones when voicemail or messages are pending.

The ELU-A2 card is installed in the Line Interface Module (LIM) of the MD110 system, providing the interface between the digital switch and analogue extension devices such as standard telephones, fax machines, and modems. The message waiting capability makes it particularly suited for environments where voicemail integration is required.

The Ericsson MD110 platform is a legacy PBX system that was widely deployed in enterprise and public sector environments. While discontinued, many MD110 installations remain operational, and replacement cards such as the ELU-A2 are essential for ongoing maintenance and capacity management.

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