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Operation and Installation Manual

Product Review

The next century GW-301 (Cellular Gateway) is a powerful communication device for collecting and syncing meter usage and status data to the NextCentury Cloud. An embedded cellular modem provides an instant data connection right out of the box, making setup fast and easy*. The Gateway user interface can be directly accessed via a simple connection to a compatible Android or iOS device using the NCSS mobile app. The GW-301 includes easy-to-understand LED indicators, providing instant device status. The GW-301 Gateway includes an integrated NextCentury radio for connection to NextCentury Transceivers and Repeaters.
*Monthly data plan is provided by next century. You can easily enable/disable cellular service remotely from the NextCentury web portal. Data is affordably provided with no contracts or hidden fees.

GW-301 Hardware

Next Century GW-301 Gateway

Figure 1 GW-301 Hardware

A 15 VDC Power
B Ethernet Port
C USB Port
D LED Indicators
E 3rd Party Port
F Antenna Connection
Packaging Content
  • NextCentury GW-301 Gateway
  • NextCentury 15V 1A power supply
  • NextCentury mounting plate
  • Package of fasteners
  • Ethernet cable
  • External Cellular Antenna


  • 205.7 mm x 139.7 mm x 27.9 mm
  • 8.1 in x 5.5 in x 1.1 in
Operation Environment:
  • -28C to 60C
  • -20F to 140F
  • Up to 90% relative humidity (non-condensing)
Power Requirements:
  • 120/240 VAC wall transformer (included)

Note: If the Gateway is installed outside where it is directly exposed to the elements, it is recommended to house it in an appropriate NEMA class plastic enclosure. (See NextCentury NEMA Enclosures document on the NextCentury website.)

  • FCC: Contains 2AB8I-RE-40-214
  • FCC: Contains VZFSWN80MA6
  • FCC: Contains A8TBM71S2
  • IC: Contains 20949-RE40214
  • IC: Contains 10609A-SWN80MA6
  • IC: Contains 12246A-BM71S2

Installation and Mounting

Mount the Gateway

Each Gateway comes with a mounting plate and can be installed using the mounting screws and anchors to secure the Mounting Plate to the wall.
Note: To maintain stability, a minimum of two screws and anchors must be used on the mounting plate (Figure 2-A). The gateway should be secured to the wall using the provided mounting screws and anchors, and should not be mounted with 3M Tape alone.

Next Century GW-301 Gateway-Mount the Gateway

Figure 2 Mount the Gateway
A Mounting Screws and Anchor
B Slide the GW-301 on the mounting plate

 Mount External Cellular Antenna
  • Attach the magnetic base of the cellular antenna to the wall.
Power the Gateway
  • Plug Power Supply into the 15-volt power port (Figure1-A).

Direct Connect

Connect with Gateway Using Mobile App

When the internet connection is provided to the Gateway requires set parameters (WiFi, network static IP, etc.) then a direct connection can be established with the Gateway using an Android or iOS device and the NCSS mobile app.

  1. Your mobile device’s Bluetooth must be turned on and within 10 feet proximity to the Gateway.
  2. Open the NCSS mobile app and select “Direct Connect” from the menu.
  3. Tap the Gateway device as it appears (fig. 3).
  4. Tap the Settings icon and adjust the connection parameters as needed.

Next Century GW-301 Gateway- Using Mobile App

Figure 3 Viewing Nearby GW-301 Using NCSS Mobile App
A The NCSS mobile app is available for Android or iOS devices.
B Nearby devices can be selected in order to establish a direct connection.

Data Connection Options

Determine your preferred internet connection type to establish NextCentury Cloud connectivity.

Option 1: Integrated Cellular
1. Enable cellular data plan for the Gateway by navigating to the property settings using the NCSS mobile app or by navigating to the NextCentury web portal on your browser.
Note: The data plan is available on a month-to-month basis and can be canceled at any time. Cellular can also be turned on remotely at any time through the web portal.

Option 2: Internet

  1. Plug Ethernet cable into the Ethernet port (Figure 1-B).
  2. If the property network requires a static IP, or other configuration parameters, then use the “Direct Connect” feature available from the NCSS mobile app (section 4).

Note: The Gateway does not need a static IP address unless required by the network configuration. It can be placed on either a WAN or LAN network and use a DHCP address.

Option 3: WiFi

  1. Using the “Direct Connect” feature on the NCSS mobile app to select a nearby GW-301 (section 4).
  2. Tap on the “Settings” icon to access network settings.
  3. Tap “Find Network” under the WiFi section and then select from the available WiFi networks. A password can then be entered.

Note: On unrestricted networks, the Gateway will automatically connect to the next century Cloud. If the Gateway does not connect, please be sure that the network does not require proxy login information and that TCP traffic is not blocked. If a proxy login or firewall is present on the network, a whitelist policy will need to be created by the IT manager for the property.

Gateway LED Operation

The GW-301 Gateway comes equipped with four LED lights on the front/side edge.

Power-Button-Icon.png Power Indicator

LED Pattern Description
Solid Green Powered on but NOT connected to NextCentury Cloud
Solid Blue Powered on and connected to NextCentury Cloud
Solid Red Power has been disconnected and the unit is running on backup power
No Light Power is off

setting icon Setup Indicator

LED Pattern Description
Solid Green Programmed to a property
Green Blink Programmed to a property: Mobile App directly connected to Gateway
Yellow Blinks Not programmed to a property: Mobile App directly connected to Gateway
No Light Not programmed to a property

pairing button RF Activity Indicator

LED Pattern Description
Green Flash Unprogrammed NCSS device communicating
Yellow Flash Programmed 3rd party device communicating
Blue Flash Programmed NCSS device communicating
Red Flash Unprogrammed 3rd Party devices communicating
No Light No Real-time RF activity

Next Century GW-301 Gateway-Icon 3G/LTE Indicator

LED Pattern Description
Solid Green Good Cellular Signal
Green  Breathing Cellular enabled, Good Cellular Signal
Solid Yellow Fair Cellular signal
Yellow Breathing Cellular enabled, Fair Cellular Signal
Solid Red Poor Cellular Signal (Not recommended)
Red Breathing Cellular enabled, Poor Cellular Signal (Not recommended)
No Light No Cellular Signal

*Note: If the Cellular Indicator is on (red, yellow or green) then the Gateway has a cellular signal and is actively able to ping (communicate with) the NextCentury Servers.

Table 1 LED Indicator Key

Power Indicator
  • When the Gateway is plugged in, the Power Indicator LED (Table 1) will be solid green indicating the device is powered on but not connected with the NextCentury Cloud. A solid blue Power Indicator LED signifies the device is powered on and has connected with the NextCentury Cloud. The Power Indicator will turn red if a loss of power occurs. If the Gateway is being reset, the Power Indicator LED will blink red one time.
Setup Indicator
  • When the Gateway has been programmed to a property, the Setup LED indicator (Table 1) is solid green. If the LED is blinking green then the Gateway is programmed to a property AND the Mobile App is directly connected to the Gateway. If the LED is not on after the device has powered on, then the unit has not yet been programmed to a property. If the LED is blinking yellow then the Gateway has not been programmed to property but the Mobile App is directly connected to the gateway. or be able to sync with the NextCentury Cloud.
RF Activity Indicator
  • This LED will be off when the Gateway does not detect any real-time RF activity (if the Gateway is not sending or receiving messages from any repeater or transceiver onsite).
  • 3 rd Party Device Transmissions: The LED will briefly flash red when the Gateway is communicating (sending or receiving messages) with an unprogrammed 3 rd party device. The LED will briefly flash yellow when the Gateway is communicating with a programmed 3 rd party device.
  • Next Century (NCSS) Device Transmissions: The LED will briefly flash green when the Gateway is communicating (sending or receiving messages) with an unprogrammed NCSS device (RE-201 Repeater or TR-201 Transceiver). The LED will briefly flash blue when the Gateway is communicating with a programmed NCSS device.
3G/LTE Indicator
  • The 3G/LTE indicator will be red, yellow, or green depending on the available signal strength. Red is an

FCC Part 15 and Industry Canada Compliance

This device complies with part 15 of the FCC Rules and Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
This portable equipment with its antenna complies with FCC’s and IC’s RF radiation exposure limits set forth for an uncontrolled environment. Users are advised to maintain a separation distance of 20cm (this will be generated from our MPE report) to comply with FCC and IC RF exposure limits.


Scope of Warranty
NextCentury warrants that all communication equipment manufactured by NextCentury will be free from defects in materials and workmanship under normal use and in accordance with next century’s documented installation and operating procedures for
a period of three (3) years from the date of manufacture.
Products not manufactured by NextCentury including without limitation, accessories, attachments, or batteries used in conjunction with NextCentury equipment are warranted, if at all, only by the original manufacturer. NextCentury’s warranties do not include the replacement of batteries used to power NextCentury products.

Limits of Liability
This warranty only applies to Read Management System components produced by NextCentury and does not cover any products which have been damaged by misconduct, negligence, vandalism, acts of God, excessive operating conditions, or unauthorized attachments or modifications. This warranty will be nullified and voided if products are placed in non-recommended installation application/fashion, or are converted, altered, or treated by other than NextCentury recommended procedures and instructions, or are read by equipment not approved by next century.
NextCentury’s liability and customer’s exclusive remedy under this warranty is expressly limited to repair or replacement of the product at NextCentury’s option and is conditioned upon the customer returning the product(s) to the location designated by NextCentury within the warranty periods or limits stated herein and pre-paying the freight costs both to and from the specified location. In no event shall NextCentury be liable for costs or expenses associated with the removal or installation of products under this warranty.
NextCentury shall have no liability or responsibility to the purchaser or any third party for any loss, cost, expense, damage, or liability, whether direct or indirect, or for special, incidental, indirect, or consequential damages of any kind, regardless of whether such liability is based on breach of contract, tort, strict liability, breach of warranties, or otherwise, and even if advised of the likelihood of such damages. Incidental and consequential damages include, but are not limited to, lost revenue, loss of profits, data, business, or goodwill. In addition, damages resulting from negligence on the part of the customer including, but not limited to, the care and maintenance of NextCentury products, or damages resulting from negligence regarding periodic testing of the product’s performance, are not covered under this guarantee.

Due to updated regulations and product improvements, NextCentury Submetering Systems, LLC reserves the right to change the product specifications without notice.

NextCentury Submetering System Contact Information

If there are any questions or concerns related to these guidelines, please contact NextCentury Submetering Systems Product Support:

v. 030921

Documents / Resources

Next Century GW-301 Gateway [pdf] Installation Guide
GW-301, Gateway, GW-301 Gateway

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