ROF1575130/1 Ericsson Ericsson MD110 PBX Expansion Card

The Ericsson ROF1575130/1 is an ELU-D3 (32) Extension Line Unit, a digital line card designed to provide 32 digital extension ports within Ericsson MD110 private branch exchange systems. This board enables the connection of digital telephone sets and devices to the PBX switching infrastructure.

The ELU-D3 is a core component of the Ericsson MD110 platform, one of the most widely deployed enterprise PBX systems globally. It allows organisations to expand their digital extension capacity in increments of 32 ports, supporting internal voice communication across office environments.

The MD110 platform is a legacy system that has been superseded by newer Ericsson and Mitel solutions following business acquisitions. However, many MD110 installations remain in active service, and replacement boards such as the ELU-D3 are essential for maintaining these systems.

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