Netbell-NTG-A100

Quick Setup Guide
⏱ Estimated Setup Time: 20–40 Minutes

Step 1 – Unbox and Identify Materials

Unbox all components and compare with the included packing list.

Step 2 – Wiring the Netbell-NTG-A100

Connect the Netbell-NTG to a power supply, ethernet connection, and speakers

  • Power

    Identify the included 24VDC power supply. Plug it into a suitable power source and connect the circular 2-pin connector the NTG-A100’s power socket labeled POWER.

  • Ethernet

    Identify the RJ45 cable and establish an ethernet connection between the NTG and your switch.

    Note: If connecting to a switch port that provides Power over Ethernet (PoE), remove the 12VDC power supply as only one source of power is needed. Using two sources of power can damage your device and cause undesired behavior.

  • Speakers

    The NTG-A100 features a built-in dual-channel amplifier, with each channel rated at 100W and supporting 4–8Ω speakers.

    To connect speakers, wire the red (positive) lead to the channel’s + terminal and the black (negative) lead to the corresponding terminal.

    When connecting multiple speakers, wire them in parallel. As a general guideline, do not exceed 80% of the channel’s rated capacity—a maximum load of 80W per channel is recommended for reliable operation.

  • Adjusting Volume

    Open the device’s casing by releasing the two clips on the back of the enclosure.

    The amplifier (blue board) includes a black volume dial located next to the 3.5mm connector.
    To increase the volume, turn the dial to the right; to decrease it, turn the dial to the left.

  • Digital Inputs

    There are 4 digital inputs (5-­24VDC) built on the board for triggering special notifications/emergency alerts. Devices such as a door sensor or a push switch can be connected to the digital input. Please note, when connecting a 12VDC-­48VDC sensor to the input, an external resistor (provided upon request, 2.2k ohm 0.5watt) must be used.

    There are two modes of operation for the digital inputs: ISOLATED and PULL UP.

    1. ISOLATED mode allows you to directly drive the Netbell-­NTG’s opto-isolator with an external voltage though and internal 1K resistor. This voltage may be in the range of 5VDC to 48VDC supplying a minimum of 2mA or a maximum of 30mA to the opto-isolator diode. There is no other internal connection to this voltage, so it is an isolated input.
    2. PULL UP mode connects a 1K resistor to an internal voltage allowing you to use a simple switch. When the switch is activated, a signal is sent to the input. These modes are selected by the switch on the board (see the board layout for reference) marked ISO and PU for isolated or pullup respectively.

    On the Netbell-NTG, open the device casing to access the digital input (DIN) configuration switches. For each DIN you plan to use, set the corresponding switch based on your wiring method:

    • PU position: Pull-up mode
    • ISO position: Isolated mode

    The switches labeled “3” in the referenced image correspond to the DIN configuration switches.

    Wiring: For distances up to 500 feet, a 20 AWG shielded wire is suitable for wiring a push button. If the distance between the push button and the controller extends up to 5,000 feet, use a 16 AWG shielded cable instead. Keep in mind that longer cable runs are more susceptible to signal interference. From the external device wire your COM wire into DIN- and your NO cable into into DIN+

    Note: This assumes you want to provide signal when activated (Ie. button pushed, door opened etc.). Use the NC cable if the inverse behavior is desired.

Step 3 – Accessing the Web Server

Finding the Netbell controller on your network, accessing the web server, and applying network configurations

  • Using Linortek Discover to find your Netbell

    Download and install the Linortek Discover desktop app using the link provided below.

    Linortek Discover for Window

    The program you download from our website is a zip file, you will need to extract the file first after downloading. After extracting the zip file, you will see a file called “Linortek_Discover_Windows.exe”, double click the file, you will most likely to see a popup window stating that “Windows protected your PC, Microsoft Defender SmartScreen prevented an unrecognized app from starting. Running this app might put your PC at risk.” with a “Don’t run” button.

    You need to click “More info”, the app name, publisher information will display, click “Run anyway” to open the app, it won’t harm your computer.

  • Finding your NTG’s IP address and Setting Network Configurations

    Access using Discover:

    By default, your NTG comes with DHCP enabled meaning if configured a DHCP server will automatically assign it an IP address.

    Once started the Discover application should display the Linortek devices on your network. If multiple Linortek devices exist use the MAC address printed on the device to identify the target device.

    Click on the target device to access the web server.

    Note: It is recommended that the device running discover is on the same LAN/VLAN and subnet of the NTG. Otherwise, it will not be listed or easily accessible unless inter-VLAN routing is configured.

    If you’re unable to find your device using Discover:

    Open Command Prompt (Windows) or Terminal(macOS) and run the following “ping SERVER”. If you get a response, copy the IP address of the responding device and paste it into the address bar of a browser.

    Additionally, you may use an IP scanner to identify devices on your network, then use the MAC address printed on the device to identify the IP held by the device.

    Lastly if all previous attempts fail, connect the ethernet cable from the NTG directly into your computer. Using a web browser enter 169.254.1.1 into the address bar (this is your NTG’s default IP address)

    Logging in:

    When prompted to login enter the default credentials Username: admin, Password: admin.

    Assigning a static IP:

    It is recommended but not required to set a static IP address to ensure reliable access to the web server. If left with DHCP enabled, it’s possible that a new IP address is assigned in the future and the use of the discover tool will be needed for future access.

    To assign a static IP go to Configure -> Network Config. Disable the “Enable DHCP” check box and enter your network configuration as needed. Document the IP address assigned for future access.

Step 4- Configuring your NTG

Configuring Time, Schedules Tones, and Push Buttons

  • Setting Time and Date

    When first configuring your Netbell, you will need to verify the time and date on your home page. Your Netbell is configured by default to use Eastern Standard Time (GMT-5) and will automatically adjust for Daylight Saving Time. If your location is not in the Eastern Time zone, please make sure to set your Time Zone first. Using an incorrect time zone will cause the bells to ring at the wrong time.

    To set your Time Zone:

    • Go to Settings > Time/Date
    • Enter your local Time Zone (for example, -5 for Eastern Time Zone, -6 for Central Time Zone, -7 for Mountain Time Zone, -8 for Pacific Time Zone)
    • Make sure the Use NTP Update box is checked (when this box is checked, the Netbell will update its time from the NTP server every 30 minutes by default)

    Note: If an ethernet connection is not supplied during normal operation, the Netbell will be unable to receive NTP updates. This can lead to a misalignment of you schedule over time. To fix this provide an ethernet connection and either manually correct the time in the time textbox or set NTP Interval text box to 1, receive an NTP update, and set it back to 30 afterwards.

  • Enabling the Audio File System

    Upon logging into your Netbell-NTG for the first time you will need to activate the audio system.

    1. Navigate to the Settings dropdown menu, then click Settings.
    2. Enter Audio in the UART Usage field (not case sensitive).
    3. Check the box Use Audio File System.

    Click SAVE, the device should start playing through the files on the SD card now.

  • Assigning Tones to Relays

    You can assign the audio tone to any relays (1-8), so you can schedule that tone from the scheduling page (Services -> Bells page).

    Tip: when you go to Services -> Relays page, only 4 relays are visible. To enable 8 relays, go to Settings -> Settings page, check the Extend Relay Range box, then click SAVE. To view all 8 relays, go to Services->Relays page, change the relays4 to relays8 in the URL. For example, the URL on your Services->Relays page might look like this: http://172.16.10.105/p/relays4.htm, you can change it to: http://172.16.10.105/p/relays8.htm to see 8 relays.

    The device comes installed with 40 default sounds from the factory, these sounds can be heard at our website: Netbell-NTG Standard Sound List – Linortek Resources.  If you prefer to use custom sounds or your pre-recorded messages, you can do so by adding those sound files to the SD card up to 10 hours as long as you convert the messages to OGG format (The Netbell-NTG uses .ogg file format for the playback of audio). If your custom sounds or messages are not in this format you will need to convert the file to an .ogg file using a free program called Audacity.  For instructions on how to create customer sounds for the Netbell-NTG, please refer to Creating Custom Sounds. We will use the tone named “BELLT001” and assign it to Relay 1 (bell 1) as an example here.

    1. Navigate to the Tasks page on your Netbell-NTG
    2. Click the Edit icon at the end of the first available line
    3. Enter a name (if desired) in the Schedule Name field
    4. Check the Use box
    5. Set Device A to RELAY
    6. Set Data A to 01+ (This refers to the Bell 1 on the bell schedule page for bell 2, 3, … use 02+, 03+, …)
    7. Set Device C to SEND UART
    8. Set Data C to PBELLT001OGG (This must be an 8-character name preceded by P and followed by OGG. This must be capitalized)
    9. Set Action to ON

    Click SAVE

  • Schedules

    Once the audio system is enabled and you have assigned a tone/message to a relay, you can then program your Netbell-NTG for audio playback. This can be done using the Netbell-NTG’s built-in bell scheduler, or by using an external signal as a trigger.

    Creating a Bell Schedule from the Bells Page:
    Each Netbell-NTG can set up to 500 bell event schedules. To add an event schedule, navigate to the Services dropdown menu, then select Bells. You will see the following page:
    You may use this page to enter up to 500 events. An event can be created in 9 simple steps.

    1. Enter an event name up to 15 characters long (use letters and numbers only)
    2. Use the 3 fields labeled Time to enter the time in HH:MM:SS (Note: the first field to select the hour uses a 24hr format. For 12 AM select 00, for 1 PM select 13)
    3.  Duration: Enter any number in the Duration box and select a duration multiplier (mS, Sec, Min), DO NOT SKIP. The max duration the Netbell-NTG can play depends on the length of the audio file. For example, if the audio file is 10 seconds, it will continuously play for 10 seconds no matter what duration you set here.
    4. (Optional) Enter a date. This will trigger the event only on this specific date
    5. Click the Add button. You will see this event listed above. Subsequent events will be listed in chronological order
    6. Once an event is added, you may adjust which relay output is triggered by selecting pips 1 – 8 under the Bell column. By default, 1 and 2 are automatically selected. Note which numbers you are using as you will need to assign a sound to each one. For numbers 5 – 8 see the section Activating Extended Relay Range.
    7. You may choose which days of the week will use this event under the Day column. Days are listed Sunday – Saturday (Note: if a specific date is chosen it will override the Day column)
    8.  Check the Use box to enable this schedule. If you only want it to trigger one time, check the Once box

    Deleting Items
    You can delete an item from your schedule by clicking the DEL button to the right of the list. To clear the entire schedule, enter #!reset@memory! Into the Name field and click Add

    Saving your Bell Schedule
    To save the bell schedule on your Netbell-NTG, click on the Download button in the bottom-right. This will open a new tab in your browser and display the schedule as plain text. Copy and paste this text into a plain text editor such as Notepad and save.

    Uploading a Premade Schedule
    You may upload a Premade schedule by entering #upload into the Name field and click Add. This will take you to a new page. Click Choose File to browse your computer for the schedule in either .txt or .csv format. Once selected, click Upload. This will return you to the previous screen with your new schedule listed.
    Creating a Bell Schedule Using the Bell Scheduler Desktop App
    There is a free desktop app to create a bell schedule available at: Support Programming – Linortek Resources
    Documentation is available at: Bell Scheduler Documentation

  • Using an External Trigger

    You may also program your Netbell-NTG to play a tone upon input from an external trigger such as a push button or door contact switch.
    Note: unless your trigger device supplies its own power, ensure your input switch is set to Pull UP (PU) (See Wiring the Netbell-NTG and Board Layout Reference)

    Activating the Digital Input
    Note: The following guide will assume you are using Digital input 1 and the tone EVACUATE, change accordingly.
    Navigate to the Services dropdown menu and select Inputs. The top 4 items are your digital inputs. They are marked DIN 1 – DIN 4. Click on the blue pencil icon under DIN 1 and enter the following settings.

    1. Enter a name in the Name field (if desired)
    2. Enter a label in the Label field (if desired)
    3. Check the Use box
    4. Set Type to State
    5. Set Display to Dot
    6. Set Relay L/T to 0
    7. Set Command L/Z/N/I to Inv
    8. Click SAVE

    Setting Task for Digital Input

    Now that your external trigger is wired to your Netbell-NTG and your digital input is configured, you will need to set up a task.

    1. Navigate to the Tasks page
    2. Click the Edit icon on the first available task
    3. Name the task if desired
    4. Check the Use box
    5. Set Device A to Digital
    6. Set Data A to 1S=1 (1 represents the number of the digital input, S signifies to your device to refer to input state, the last 1 signifies the state is on)
    7. Set Device C to Send UART
    8. Set Data C to PEVACUATEOGG (to play sound file EVACUATE in this sample)
    9. Set Action to ON
    10. Click SAVE

    If you are using a trigger such as a door contact switch, set Data A in the example above to 1S=0 to play the tone when the contact is broken

FAQ’s

There are two main methods to manually activate a sound for evacuation on your Netbell device without requiring additional hardware:

Method 1: Web Interface

  1. Log in to your Netbell device’s webpage
  2. Navigate to the Services + Relays page
  3. Click the red dot under the State tab
  4. This will manually activate the evacuation bell

Method 2: RESTful API via Mobile App

You can use the device’s RESTful API to activate the relay (bell) through a third-party mobile application:

  • For iPhone users: Rest-HTTP API Client (or similar apps)
  • For Android users: Various free REST API client apps are available
  • These apps allow you to send API commands to trigger the evacuation sound remotely

Are there other activation methods available?

Yes, the most straightforward method would be using a physical push button. However, the web interface and API methods described above provide the manual control you need without requiring any additional hardware.

Which method is recommended?

  • Web Interface: Best for manual activation when you have computer/tablet access
  • Mobile API: Ideal for remote activation and emergency situations when you need to trigger the alarm from anywhere with internet connectivity

Both methods provide reliable manual control of your evacuation system without the need for additional buttons or accessories.

The most common issue we have seen this happen is if your computer uses WiFi, and the WiFi network is on different subnet of your Linortek device connected to. Make sure the Linortek unit is on the same subnet as your computer.

The other possible issues might be the firewall on your network or your computer blocking the communication, talk to your IT department and make sure UDP port 30303 is allowed. If you use Windows computer, you can try to open Command Prompt and type there: “ping server”. If you get “Reply from” please open a browser and type this IP address to the URL line.

If you still have problems, you can connect the unit directly to your ethernet port on your computer, the factory default is 169.254.1.1.
Type the IP address into a chrome or Firefox and it should bring you to the Login web page.

It is recommended to power you Linortek devices with a surge protector, as power surges can temporally cause software hangups or even permanent hardware damage.

In the case with no surge protector, please perform a factory reset on your device.

NOTE: This will reset your network (DHCP enabled), time, and tasks configurations.  You will need to re-discover your device’s IP and set your configurations to their previous state once the device.

Theres a couple points of failure ensure your setup is exactly as described below:

  • You have properly wired the speakers to the left or right channel. (See wiring diagram in step 2)
  • You have adjusted the volume knob on the device to ensure it’s not on min/off (see step 2)
  • You have properly assigned a sound to relay (see step 4)
  • You have enabled the audio file system (see step 4)

Additional Resources

Troubleshooting Tips Troubleshooting Tips

Troubleshooting Tips

All 40 default sounds that come with your Netbell-NTG along with their file names

Full Manual Full Manual

Full Manual

For more information follow the Netbell-NTG Manual.

Remote Device Setup Remote Device Setup

Remote Device Setup

Configuration instructions for remote push buttons and remote Netbell device communication.

Video Tutorials Video Tutorials

Video Tutorials

Check our Video Tutorials for step-by-step instructions.