The Civil Contingencies Bill (2004) places a legal responsibility on building owners to protect the public/employees during an emergency (fire/terror attack). Part of the recommendation concerning “resilient communications” mentions the usage of a secure paging system to overcome dependence on GSM technology (Global System for Mobile communications). As the Deaf Alerter system operates on a secure, licensed frequency it makes it ideal for use in situations where emergency, high-priority messaging is vital. Since we guarantee complete building coverage (unlike off-the-shelf wide-area paging systems) it makes the system particularly suited to critical communications.