Akuvox E21A is a vandal-resistant SIP-compliant VoIP emergency station designed for outdoor safety in locations like campuses, parking facilities, and medical centers. Crafted from 316-grade stainless steel with an IP65 rating, it features a panic button, two-way audio with echo cancellation, and DTMF-controlled relays for door entry. Supporting PoE or 12-24V DC power, its flush-mounted design ensures durability. Ideal for education, healthcare, and transportation sectors, it integrates seamlessly with SIP-capable PBX systems for reliable emergency communication.