ROF1575114/3 Ericsson Ericsson MD110 PBX Expansion Card

The Ericsson ROF1575114/3 is an ELU-A (8) Extension Line Unit in sub-equipped configuration, designed for the Ericsson MD110 private branch exchange system. This analogue extension board provides connectivity for analogue telephone devices within the MD110 platform, with capacity for up to 8 extension lines in its sub-equipped state.

The ELU-A card is used within MD110 cabinet systems to connect standard analogue telephones, fax machines, and modems to the digital PBX infrastructure. The sub-equipped designation indicates the board is fitted with a reduced component count, allowing for field expansion as capacity requirements grow.

The Ericsson MD110 is a legacy PBX platform that was widely deployed in enterprise telephony environments. While the system has been superseded by IP-based solutions, many MD110 installations remain operational and require replacement or spare components for ongoing maintenance.

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