Huawei CN21USIA1 Universal service interface function; SGSN9810/USN9810 core-network platform; standard subrack board Telecom System Card / Module

The Huawei CN21USIA1 (USIA1) is a Universal Service Interface board used in the Huawei SGSN9810/USN9810-family core-network chassis, providing universal service interface connectivity within the equipment shelf. It is a standard board type in this generation of Huawei carrier hardware, working alongside the other service and interface boards fitted into the same subrack. It is stocked as a like-for-like maintenance spare for operators keeping an existing SGSN9810/USN9810-family chassis running rather than replacing the platform outright. Tech-Star (UK-based, shipped worldwide) supplies this board tested and ready to deploy – get in touch to confirm stock and compatibility with your chassis.

Boards in this family are commonly sourced together with sibling interface and control boards when refreshing spares for a whole shelf, since operators typically replace a set of related cards during the same maintenance window rather than one board in isolation.