SMS can be useful for status requests, controlled rebooting, changing between WAN and cellular paths, switching a supported relay output or reporting a digital-input alarm. Because SMS uses the mobile signalling path, it may still work when normal packet data or the remote VPN is unavailable.
Only functions explicitly supported by the router and safely connected equipment should be used. Physical control requires interlocks and a fail-safe design; an SMS command should not be the sole safety mechanism for machinery. Confirm the command syntax and model compatibility in the current Comset guide, and test how acknowledgements and errors are reported.
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What can an industrial router safely control or report through SMS when the data connection is unavailable?
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Use this answer as a practical starting point. Current scope, specifications, compatibility, availability, pricing, timing and next steps should be confirmed directly with Comset where they affect a decision.
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