Akuvox E20S is a vandal-resistant, single-button, SIP-enabled, PoE-enabled voice emergency communication system with high sound quality and echo cancellation

Akuvox E20S is a rugged, vandal-resistant, 316 grade stainless steel audio emergency call system, intended for indoor use in places where high security is required such as commercial stations and public centers. The device features a single emergency alarm button that enables two-way voice communication over IP networks with echo cancellation to improve voice quality. The E20S supports SIP for seamless integration with compatible PBX systems and provides support for advanced group conferencing. It is powered via Power over Ethernet (PoE) for easy installation and reduced cable usage. The device operates in a temperature range of -20°C to +55°C with an operating humidity between 10% and 90%. Its compact size allows it to be installed inside walls using customized boxes.

The device is flush mounted and complies with standard 1299 or 86 wall boxes.
It has a single panic button for instant operation, along with a built-in microphone and speaker to support two-way voice calls over the network.
The device works over PoE (IEEE 802.3af) only, without support for a second external power supply.
It supports SIP v1 and v2 protocols, and includes support for a range of audio codes such as G.711a, G.711μ, and G.722.
The device also features an operating temperature of –20° to +55°C and an operating humidity of 10% to 90%.