ROF1375428/1 Ericsson Ericsson MD110 PBX Expansion Card

The Ericsson ROF1375428/1 is an ELU 32 (Extension Line Unit 32) board designed for Ericsson MD110 private branch exchange systems. This unit provides analogue extension line interfaces, enabling connection of standard analogue telephones and devices to the MD110 switching platform.

The ELU 32 is used within enterprise telephony environments where organisations require support for traditional analogue endpoints alongside digital infrastructure. It typically supports multiple extension ports per card, allowing efficient scaling of analogue device connectivity within the MD110 cabinet architecture.

The Ericsson MD110 is a legacy PBX platform that was widely deployed in medium to large enterprise environments. While the system has been discontinued, many installations remain in active service, creating ongoing demand for replacement and spare components such as this extension line unit.

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