Example Applications
This section shows a few examples of using the Zyxel Device in various network environments. Note that the Zyxel Device in the figure is just an example Zyxel Device and not your actual Zyxel Device.
Connect the WAN port to a broadband modem or router for Internet connection. Connect computers to the Zyxel Device’s LAN ports, or wirelessly, and access the Internet simultaneously.
Zyxel Device’s Internet Access Application
You can also configure Firewall on the Zyxel Device for secure Internet access. When the Firewall is on, all incoming traffic from the Internet to your network is blocked by default unless it is initiated from your network. This means that probes from the outside to your network are not allowed, but you can safely browse the Internet and download files.
Zyxel Device’s Internet Access Application: Ethernet WAN
WAN Priority
The WAN connection priority is as follows:
2 Ethernet WAN
4 Cellular WAN (3G/4G)
See Zyxel Device’s USB Support for more information about Cellular backup.
Dual-Band WiFi
*Check Zyxel Device Comparison Table for AX Series to see if your Zyxel Device supports dual-band WiFi.
When WiFi is enabled on the Zyxel Device, IEEE 802.11a/b/g/n/ac/ax compliant clients, such as notebooks, tablets, and smartphones can wirelessly connect to the Zyxel Device to access network resources.
With dual-band, the Zyxel Device is a gateway that can use both 2.4G and 5G WiFi networks at the same time. WiFi clients could use the 2.4 GHz band for regular Internet surfing and downloading while using the 5 GHz band for time sensitive traffic like high-definition video, music, and gaming.
The Zyxel Device supports WiFi6 that is most suitable in areas with a high concentration of users.
Dual-Band Application
Triple-Band WiFi
*Check Zyxel Device Comparison Table for AX Series to see if your Zyxel Device supports triple-band WiFi.
With triple-band, the Zyxel Device can use 2.4G/5G/6G bands to operate simultaneously.
The 6 GHz band provides less coverage but has the highest amount of channels among the three frequency bands. Use the 6 GHz band for the most congestion-free transmission if your client devices supports WiFi 6E.
*Due to each country’s regulations on frequency band usage, the available bands (2.4 GHz, 5 GHz, and 6 GHz) may differ by countries or markets the Zyxel Device products are sold to.
WiFi clients could use the 2.4 GHz band for regular Internet surfing and downloading while using the 5 GHz or 6 GHz band for time sensitive traffic like high-definition video, music, and gaming.
Triple-Band Application
Multi-Gigabit Ethernet
For Zyxel Devices that support 10 Gbps/2.5 Gbps Multi-Gigabit Ethernet (GbE) WAN/LAN ports, the port speeds are backward compatible with standard Gigabit speed. The Zyxel Devices with an SFP port can also provide Internet access through a Multi-Gigabit GPON WAN or Ethernet connection.
A 2.5 Gigabit Ethernet port supports speeds of 2.5 Gbps if the connected device supports 2.5 Gbps. While a 10 Gigabit Ethernet port supports speeds of 10 Gbps if the connected device supports 10 Gbps and a Cat 6a (up to 100 m) or Cat 6 cable (up to 50 m) is used.
Some network devices such as gaming computers, servers, network attached storage (NAS) devices, or access points may have network cards that are capable of 2.5 Gbps or 5 Gbps connectivity.
If these devices are connected to a 1 Gbps or 10 Gbps Ethernet port, they can only transmit or receive up to 1 Gbps as speeds of 2.5 Gbps / 10 Gbps cannot be attained. Moreover, if network devices with 2.5 Gbps / 10 Gbps network cards are connected to a 2.5 Gbps / 10 Gbps Ethernet port, you must use Cat 5e / Cat 6A or better Ethernet cables to achieve 2.5 Gbps / 10 Gbps speeds. Most buildings, at the time of writing, use Cat 5e or Cat 6 Ethernet cables.
Multi-Gigabit Ethernet ports automatically allow connections up to the speed of the connected network device (100 Mbps (not supported on EX5501-B0), 1 Gbp s, 2.5 Gbps or 5 Gbps), and you just need to use a Cat 5, Cat 5e or Cat 6 Ethernet cable.
Multi-Gigabit Application
See the following table for the cables required and distance limitation to attain the corresponding speed.
Ethernet Cable Types
transmission speed
maximum distance
bandwidth capacity
Category 5
100 m
100 MHz
Category 5e or better
1G / 2.5G / 5G*
100 m
100 MHz
Category 6
5G / 10G
100m / 55 m
250 MHz
Category 6a
100 m
500 MHz
Category 7
100 m
600 MHz
* A high quality Category 5e cable can support 5 Gbps and up to 100m with no electromagnetic interference.
VoIP Applications
The Zyxel Device’s VoIP function allows you to register up to two SIP (Session Initiation Protocol) accounts and use the Zyxel Device to make and receive VoIP telephone calls. The Zyxel Device sends your call to a VoIP service provider’s SIP server which forwards the calls to either VoIP or PSTN phones.
VoIP Application
Zyxel Device’s USB Support
The USB port of the Zyxel Device is used for cellular WAN backup, file-sharing, and media server.
Cellular WAN Backup
Connect a supported cellular USB dongle with an active SIM card to the USB port. This adds a second WAN interface and allows the Zyxel Device to wirelessly access the Internet via a cellular network. The cellular WAN connection is a backup in case the DSL/Ethernet/Fiber connection fails.
To set up a cellular connection, click Network > Broadband > Cellular Backup.
To update the supported cellular USB dongle list, download the latest WWAN package from the Zyxel website and upload it to the Zyxel Device using the Maintenance > Firmware Upgrade screen.
Internet Access Application: Cellular WAN
File Sharing
Use the built-in USB 3.0 port to share files on a USB memory stick or a USB hard drive (A). Use FTP to access the files on the USB device.
USB File Sharing Application
Media Server
You can also use the Zyxel Device as a media server. This lets anyone on your network play video, music, and photos from a USB device (A) connected to the Zyxel Device’s USB port (without having to copy them to another computer).
USB Media Server Application
Ways to Manage the Zyxel Device
Use any of the following methods to manage the Zyxel Device.
Web Configurator. This is recommended for management of the Zyxel Device using a (supported) web browser.
Simple Network Management Protocol (SNMP). Use to monitor and/or manage the Zyxel Device by an SNMP manager.
Secure Shell (SSH), Telnet. Use for troubleshooting the Zyxel Device by qualified personnel.
FTP. Use FTP for firmware upgrades and configuration backup or restore.
Good Habits for Managing the Zyxel Device
Do the following things regularly to make the Zyxel Device more secure and to manage the Zyxel Device more effectively.
Change the WiFi and Web Configurator passwords. Use a password that is not easy to guess and that consists of different types of characters, such as numbers and letters.
Write down the passwords and put it in a safe place.
Back up the configuration (and make sure you know how to restore it). Restoring an earlier working configuration may be useful if the device becomes unstable or even crashes. If you forget your password, you will have to reset the Zyxel Device to its factory default settings. If you backed up an earlier configuration file, you would not have to totally re-configure the Zyxel Device. You could simply restore your last configuration.