Preserve access to legacy serial equipment without redesigning the stack. This DB-25M modem adapter is designed for Digi One and PortServer TS II environments, giving infrastructure teams a practical way to connect older modem and serial devices to supported Digi platforms. The 10-pin interface keeps the connection path straightforward, reducing the risk of mismatched cabling in dense rack or remote-access deployments. For operations that still depend on serial management, console access, or modem-based workflows, the right adapter can mean the difference between a controlled migration and an expensive replacement cycle. This part is suited to environments where reliability, compatibility, and repeatable installation matter more than generic USB conversion. It helps extend the life of installed equipment while keeping service access consistent across sites. Choose this adapter when you need a purpose-built connection for legacy Digi serial infrastructure and want to avoid the uncertainty of improvised third-party cabling.