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System requirements, release notes, installation instructions, user manuals, and other information for TASSTA voice communication, messaging and data solutions. Click a product to browse the documents.
Critical upgrade notice
Starting March 2025, you must upgrade your system to ensure T.Flex iOS compliance with updated security standards, maintain secure connections, and meet FirstNet certification requirements.
To avoid service disruptions, please read the article for full details and contact TASSTA Support for assistance.
Deprecation warning
As of April, 2025, support for Debian 9 "Stretch" and Debian 10 "Buster" environments will officially end. Moving forward, updates for T.Lion Server and TASSTA Services will only be compatible with Debian 12 "Bookworm".
To ensure your TASSTA servers continue to receive updates, please read the article and migrate your existing deployment to Debian 12 by April 1, 2025. We strongly recommend starting the migration as soon as possible. For assistance, create a ticket at the TASSTA Help Center or contact our service team.