Some countries cannot justify a permanent national radio network, and some regions within any country have no infrastructure to build one on. This solution answers both.

A portable voice communication capability that deploys in minutes and links local field networks back to a national control centre. It operates independently where infrastructure is absent, and connects where it is present.

• Crisis management and disaster response
• Emergency communication in regions with no permanent coverage
• National security operations that move
• Countries where a full national network is not economically available

Deployment time is the specification that matters. Equipment that takes two days to make operational has missed the period in which it would have made the most difference — which is why "within minutes" is the requirement rather than a feature.

Power, and an interoperability agreement. A deployable system needs a power source that survives the event, and a coordination structure agreed before the event with whoever else will be on scene. Both are organisational decisions rather than equipment ones, and both decide whether the capability works on the day. See emergency trailers.