Emergency Road-side Telephone (VoIP)

SADRA Hands-free VoIP Flush/wall mount Telephones are designed to provide direct point-to-point communications between people throughout a facility over an existing internet protocol LAN. The VoIP telephones are intended for connection to a 10/100 Based Ethernet and operate using POE+ or an alternative power source.

The VoIP telephone features real-time Modbus alarm reporting that enables system supervisors to monitor the phone’s activity and address callers’ needs or maintenance issues immediately.

SADRA’s Hands-free VoIP Telephone features makes them ideal for use in any application requiring point-to-point communications or telephone system access.

Typically installations locations include:

  • Tunnel
  • College Campuses
  • Parking Garages
  • Hospitals
  • Business and Industrial Parks
  • Factories


Main Features

    • Hands-free and single push button (Call, Emergency Auto-dial)
    • Weather-resistant Flush-mount Design
    • Vandal proof
    • No Additional Interface Required
    • Web Page Configuration
    • Real-time Alarm Reporting Via Modbus TCP protocol
    • Power Over Ethernet (POE+)/ 220 VAC
    • SIP Compatible
    • Modbus TCP protocol compatible
    • RJ45 LAN
    • Auto Answer
    • Auto check with internal self-testing
    • Call indicator LED
    • Over-voltage protection for Ethernet interface
    • Echo cancellation
    • Auto noise detection (Adjusting output volume according to the environment’s noise )


    Technical Specification

    • Manufacturer: SADRA
    • Mounting :Flush mounted / Wall mounted
    • Housing: Stainless steel/ Aluminum Die Casting housing
    • Power supply: Power-over-Ethernet (POE+) or 220 VAC
    • Power Consumption: 25 watts, max.
    • Network: 10/100 Based Ethernet RJ45
    • INPUT: Single vandal proof push button (Call, Emergency Auto-dial)
    • Call Control Signaling: SIP(RFC3261) protocol
    • Working temperature: from -15°C to +70°C.
    • Protection level: IP66
    • Control Interface: Modbus TCP protocol for control system and SCADA monitoring.
    • Controls:
      • External: push-button input
      • Web: VoIP setting, Net setting, Speaker volume, Mic. volume, reset factory, reboot
    • Indicators: Call received LED (Blue), Ready for use LED (green), Out of service LED (red)
    • Configuration: Embedded web panel
    Auto check with internal self-testing
    • Microphone error: Detection of microphone errors through cyclic microphone test
    • Speakers errors: Detection of speakers errors through cyclic speakers test
    • Sending its current call status to control system and SCADA via Modbus TCP protocol
    Call Status
    • Ready
    • Out of service
    • Incoming call
    • Dialing
    • In conversation
    • EMC :
      • IEC 61000-4-2:8
      • IEC 61000-4-4:12
      • IEC 61000-4-5:14
      • IEC 61000-4-6:13
      • IEC 61000-4-8:9
      • IEC 61000-4-11:4


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