Ericsson 1/ROF1376301/1 AXE Telecom System Card / Module

The Ericsson 1/ROF1376301/1 is an Extension Switching Unit (ESU) module designed for Ericsson MD110 / MX-ONE family of digital telephone exchange systems. This unit handles switching functions for subscriber line extensions, managing the connection and routing of voice traffic within the exchange infrastructure.

The ESU forms part of the subscriber switching subsystem within MD110 / MX-ONE-based networks, enabling efficient handling of multiple subscriber connections. It is deployed within fixed-line telecommunications networks operated by carriers and large enterprise environments requiring robust, carrier-grade switching capacity.

This is a legacy component from Ericsson’s established MD110 / MX-ONE platform, which has been widely deployed globally in public switched telephone networks. While the MD110 / MX-ONE system has been succeeded by newer platforms, many installations remain operational and require ongoing maintenance and spare parts support.

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