ROF1375064/1 Ericsson Ericsson MD110 PBX Expansion Card

The Ericsson ROF1375064/1 is an ELU 34/1 (Extension Line Unit 34/1), a telecommunications interface board designed for the Ericsson MD110 private branch exchange system. This unit provides analogue extension line interfaces, enabling the connection of standard analogue telephones and devices to the MD110 switching platform.

The ELU 34/1 is deployed within MD110 cabinets to expand the number of available analogue extension ports. It serves enterprise telephony environments where a mix of digital and analogue endpoints is required, supporting traditional telephone instruments, fax machines, and modems connected to the PBX infrastructure.

The Ericsson MD110 is a legacy PBX platform that was widely deployed across enterprise and public sector environments. Whilst no longer in active manufacture, many MD110 systems remain operational, and spare units such as the ELU 34/1 are sought after to maintain and extend these existing installations.

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