ROF1376304/1 Ericsson Ericsson MD110 PBX Expansion Card

The Ericsson ROF1376304/1 is a Magazine Unit (MGU) providing 2×4 E1/T1 ISDN trunk interfaces. This module enables connection of digital trunk lines to Ericsson telecommunications systems, supporting both E1 (2.048 Mbit/s) and T1 (1.544 Mbit/s) standards for ISDN Primary Rate Interface (PRI) connectivity.

This MGU card is designed for installation in Ericsson MD110 PBX systems, where it provides digital trunk capacity for enterprise voice communications. The 2×4 configuration indicates support for multiple E1/T1 circuits, enabling high-density trunk connectivity for larger installations requiring substantial external line capacity.

The MD110 platform and its associated hardware represent legacy Ericsson telecommunications infrastructure. While these systems remain operational in many enterprise environments, they have been superseded by newer platforms. This module is sought after for maintenance, expansion, and spares provisioning of existing MD110 installations.

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