OSN 7500 is a new-generation optical transmission system developed by Huawei based on the current applications and development trend of MANs. It is an optical core switching (OCS) device applied to service scheduling nodes at the backbone layer of MANs to schedule and transmit services of different types and granularities.

OSN 7500 adopts a unified switching architecture and can function as an MPLS/MPLS-TP-based packet device or a TDM device. When working with other devices of Huawei, OSN 7500 supports various networking modes, including the pure packet mode, hybrid networking (packet + TDM) mode, and pure TDM mode, achieving optimal processing for packet services and traditional SDH services.

In TDM mode, OSN 7500 supports 360 Gbit/s higher order cross-connect capacity and 40 Gbit/s lower order cross-connect capacity. In packet mode, OSN 7500 supports 160 Gbit/s packet switching capacity.