As of September 26, 2025, SDI USA has permanently ceased operations and discontinued all support for its products, including TN3270 Plus, SDI LPD, and other licensed software. The company has confirmed there will be no future updates, technical support, patches, or new releases, and its website will remain unmonitored only until December 31, 2026. Licensed customers can continue using their software at no cost, but should be aware it will remain unsupported indefinitely.
Software that no longer receives updates or vendor support is a known security liability as environments evolve.
Unsupported terminal emulators often rely on legacy components and outdated security assumptions. As infrastructure changes — including new operating system versions, browser updates, and modern identity requirements — these tools can quickly become incompatible, non-compliant, or unsafe. This exposes organisations to operational disruption, audit failures, and avoidable security risk.
Why This Matters Now
Traditional TN3270 and legacy terminal emulators were built for a time when networks were confined within corporate perimeters and internal access was implicitly trusted. That model no longer exists.
In today’s hybrid and remote environments, unsupported emulators:
- Receive no security patches or vulnerability fixes
- Cannot integrate with modern authentication methods such as MFA or single sign-on
- Become brittle as operating systems and browsers evolve
- Fall short of current compliance and audit expectations
Continuing to rely on unsupported terminal software introduces growing risk with no path to remediation.
A Secure, Supported Alternative: Jubilant Terminal Emulator
Jubilant Terminal Emulator is a modern, fully supported replacement for end-of-life terminal emulation products.
Designed for today’s enterprise environments, Jubilant provides:
- Zero-client, browser-based access, eliminating local installs and reducing endpoint risk
- Strong security and compliance controls, including support for MFA, single sign-on, federated identity, and modern TLS encryption
- Centralised management and configuration, simplifying oversight across distributed teams
- Broad host connectivity, supporting Mainframe, IBM i (AS/400), Unix, VMS, and MultiValue systems
- Scalable architecture that works across devices and browsers without plugins or applets
Unlike unsupported legacy tools, Jubilant is actively maintained, security-tested, and backed by a clear product roadmap and support lifecycle.
Act Now: Don’t Let Unsupported Software Put You at Risk
With SDI products now officially unsupported, organisations must assess the long-term risks of continuing to rely on software with no updates, no security fixes, and no vendor accountability.
Jubilant Terminal Emulator offers a secure, supported path forward — enabling organisations to modernise terminal access without disrupting core systems.