Akuvox E21A

Vandal-resistant Emergency Intercom

Akuvox’s E21A is a high-quality, compact SIP emergency intercom designed made from ruggedized 316-grade stainless steel, this intercom is built for outdoor use, typically in public spaces such as parking facilities, college campuses, medical centers, and industrial parks. E21A is designed to last and handle vandalism.

Akuvox E21A Product Specification:
  • Manufacturer: Akuvox
  • Model: E21A
  • Front panel: 316-grade stainless steel
  • Waterproof & Dust-proof: IP65
  • Installation: Flush mounted
Akuvox E21A Key Features:
  • Vandal resistant body, with a panic button
  • Two-way audio communication over IP networks
  • Echo Cancellation
  • Voice Activation Detection
  • Comfort Noise Generator
Akuvox E21A Technical Specifications:

At a Glance

  • Vandal resistant body, with a panic button.
  • Two-way audio communication over IP networks with Echo
  • Cancellation feature.
  • Complies with SIP standard for easy integration in every SIP capable PBXes.
  • PoE (IEEE802.3af, Power-over-Ethernet).

Physical & Power

  • Front panel: 316 grade stainless steel
  • Button: 1 panic button
  • Reset: 1 reset button (on board)
  • Inputs: 2
  • Relays Out: 2
  • Microphone: 1
  • Speaker: 1
  • Water-proof & Dust-proof: IP65
  • Ethernet ports: RJ45, 10/100Mbps adaptive
  • 802.3af Power-over-Ethernet
  • 12 ~ 24V DC input (if not using PoE)
  • Water-proof & Dust-proof: IP65
  • Installation: Flush-mounted
  • Flush-mounted Dimension: 210x120x61mm
  • Working Humidity: 10~90%
  • Working Temperature: -20°C ~ +55°C
  • Storage Temperature: -40°C ~ +70°C


  • SIP v1 (RFC2543), SIP v2 (RFC3261)
  • Narrowband audio codec: G.711a, G.711μ,
  • Broadband audio codec: G.722
  • DTMF: In-band, out-of-band DTMF (RFC2833), SIP Info
  • Echo Cancellation
  • Voice Activation Detection
  • Comfort Noise Generator

Door Entry Feature

  • Relays controlled individually by DTMF tones


  • Networking & Protocol: IPv4, HTTP, HTTPS, FTP, SNMP, DNS, NTP, TCP, UDP, ICMP, DHCP, ARP

Deployment & Maintenance

  • Auto-Provisioning
  • Web management portal
  • Web-based packet dump
  • Configuration backup / restore
  • Entry log export
  • Access table export / import
  • Firmware upgrade
  • System logs (include door access logs)

Application Scenario

  • Education: universities, campuses, schools
  • Logistics & Transportation: airports, parking lots
  • Healthcare: hospitals, laboratories

Contact US

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