Netbell®-NTG Network Multi-Tone/Message Generator/Controller

Built-In Web-Based Bell Controller/Multi-Tone/Message Generator, Self-Contained, Ease of Scheduling, Remote Access, No Additional Software or Designated Computer Required


The Netbell-NTG Multi-Tones/Messages Generator is designed to generate/schedule audible alerts for an existing Public Address (PA) System for signaling start and stop work, lunch breaks, shift changes, general alarms, service notification in schools, factories, businesses, warehouses, industrial facilities, commercial buildings, retail stores and more.

Access the controller’s webpage from any computer on your network, activate &schedule multi-tones/messages for school/factory/industrial commercial Public Address system

Netbell®-NTG tone/message generator is a a network enabled, all-in-one system that is designed with ease-of-use in mind. It’s built on TCP/IP platform with a built-in web server and special designed hardware/software for generating/scheduling tones and/or voice messages. It’s an ideal solution for applications where audible alerts are needed over an existing Public Address system for schools, factories, commercial businesses to signal class changes, breaks, shift rotations, timer start and stop work, process monitoring and other general alarms.

Intended to be an all-in-one solution, the Netbell-NTG comes with tone/message generating, event scheduling hardware and software in one compact unit for your Public Address or paging systems. The Netbell-NTG comes with 40 standard tones/messages and the capability of adding pre-recorded custom tones and/or voice message up to 15 hours (voice message file rate at 44.1K/16bit). 16 tones/messages can be selected/activated by schedule and/or the digital inputs.

The Netbell-NTG has two dry contact relay outputs built on the board that can be used to ring physical bells/buzzers or to control other electronic devices such as signal lights and 4 digital inputs that can be used to trigger special notifications/emergency alerts with a push switch. There is one phone jack that can be used to test tones/messages before it goes to live and one audio connector to activate a PA system.

Download the PDF here

The Key Features

  • Network enabled, program and schedule to play from a web browser or BellScheduler desk app over the network, no additional software or designated computer required
  • Two dry contact relay outputs built on the board that can be used to ring physical bells/buzzers or to control other electronic devices
  • 4 programmable digital inputs for triggering special events
  • Built-in one stereo audio line output (30ohm)
  • 40 standard tones/messages and the capacity of adding pre-recorded custom tones and/or voice message up to 10 hours (voice message file rate at 44.1K/16bit)
  • Select/activate 16 tones/messages for different events
  • Up to 500 programmable weekdays/calendar-based event schedules
  • Centralized programmable tone selection
  • Built-in phone jack for audio testing and setup
  • Master volume control
  • Built-in real time clock with user changeable NTP automatic Internet time setting, automatic Day Light Savings Time and leap year correction
  • Flexible and accurate control of when the tones/messages played: (HH:MM:SS, MM/DD/YYYY, SUNDAY-SATURDAY)
  • Built in rechargeable battery that can keep all settings for up to 7 days in the event of power outage
  • POE (Power over Ethernet) enabled.
  • Designed, developed and made in USA


  • Web Server: Built-In (All software located on built-in web server.)
  • Event Schedules: Up to 500 Event Schedules (Add schedules from webpage or desk app)
  • Tone/Message Play Duration: User Programmable for Each Event
  • Built-In Tones: 25 Standard Tones
  • Relay Outputs: 2 (Connect physical bells/buzzers)
  • Digital Inputs: 4 (Trigger special events)
  • Audio Output: 1 Stereo Line Output (30ohm)
  • Audio file format: Ogg Vorbis audio format
  • Audio file resolution: 16bit/8bit
  • Audio file rate: 44.1K/22K/11K/8K
  • File storage size: 1G
  • Enclosure: Polycarbonate, White Gray Body/Cover, 125X175X60MM
  • Accessories: 3M RJ45 Cable/3ft RCA Cable/3ft 3.5mm Audio Cable/3ft 4-Conductor Cable
  • Power Input: 12VDC(power supply included)
  • Voltage Sensor: On Board
  • Temperature Sensor: On Board
  • Rechargeable Battery: On Board (Built-in rechargeable battery for offline time & settings keeping backup)
  • Working Temperature: From 0 to +60 Celsius
  • Supported Protocols: HTTP/ SMTP/SNTP


  • Product Code: NETBELL-NTG
  • Price: $1,399.00 (GST Excl.)

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