ZYXEL VMG3927-BX0A (01) PDF Document

The default login details for your ZYXEL VMG3927-BX0A router are as follows:

The following documentation is available to help you with your ZYXEL VMG3927-BX0A:

Quick Start Guide: This guide shows you how to connect the Zyxel Device.

More Information: You can go to support.zyxel.com to find other information on the Zyxel Device.

The user guide for the ZYXEL VMG3927-BX0A uses the following conventions for warnings and notes:

Warnings: These tell you about things that could harm you or your device.

Note: These tell you other important information, such as other things you may need to configure, helpful tips, or recommendations.

The user guide for the ZYXEL VMG3927-BX0A uses the following syntax conventions:

All models in this series may be referred to as the “Zyxel Device”.

Product labels, screen names, field labels and field choices are all in bold font.

A right angle bracket ( > ) within a screen name denotes a mouse click. For example, Network Setting > Routing > DNS Route means you first click Network Setting in the navigation panel, then the Routing sub menu and finally the DNS Route tab to get to that screen.

Figures in the user guide may use the following generic icons. The Zyxel Device icon is not an exact representation of your device.

Do the following things regularly to make your ZYXEL VMG3927-BX0A more secure and to manage it more effectively:

Change the password. Use a password that’s not easy to guess and that consists of different types of characters, such as numbers and letters.

Write down the password 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 device to its factory default settings. If you backed up an earlier configuration file, you would not have to totally re-configure the device. You could simply restore your last configuration.

None of the LEDs are on if the ZYXEL VMG3927-BX0A is not receiving power. The following table describes the LED indicators for your device.

Transceiver Installation

Use the following steps to install an SFP transceiver:

1. Locate the transmit (Tx) and the receive (Rx) markings on the SFP+ module to identify the top.

2. Insert the transceiver into the slot.

3. Press the transceiver firmly until it clicks into place.

4. The Zyxel Device automatically detects the installed transceiver. Check the LEDs to verify that it is functioning properly.

5. Close the transceiver’s latch (the latch styles vary).

6. Connect the fiber optic cables to the transceiver.

Transceiver Removal

Use the following steps to remove an SFP transceiver:

1. Remove the fiber optic cables from the transceiver.

2. Open the transceiver’s latch (the latch styles vary).

3. Pull the transceiver out of the slot.

If the wireless network is turned off, press the WiFi button. Check the WLAN/WPS LED on the front panel to see if the wireless network is active.

You can also use the WPS button to quickly set up a secure wireless connection between the Zyxel Device and a WPS-compatible client by adding one device at a time.

To activate WPS:

1. Make sure the POWER LED is on and not blinking.

2. Press the WPS button and release it.

3. Press the WPS button on another WPS-enabled device within range of the Zyxel Device. The WLAN/WPS LED flashes amber while the Zyxel Device sets up a WPS connection with the other wireless device.

4. Once the connection is successfully made, the WLAN/WPS LED shines blue or green.

To turn off the wireless network, press the WiFi button. The WLAN/WPS LED turns off when the wireless network is off.

For the ZYXEL VMG3927-BX0A, press the WLAN button for more than one second, and the WPS button for more than one second.

If you forget your password or cannot access the Web Configurator, you will need to use the RESET button to reload the factory-default configuration file. This means that you will lose all configurations that you had previously. The password will be reset to the factory default (see the device label), and the LAN IP address will be “192.168.1.1”.

1. Make sure the POWER LED is on (not blinking).

2. To set the device back to the factory default settings, press the RESET button until the POWER LED begins to blink and then release it. When the POWER LED begins to blink, the defaults have been restored and the device restarts.

For the ZYXEL VMG3927-BX0A, you need to press the RESET button for more than five seconds.

To use the Web Configurator, you need to allow:

1. Web browser pop-up windows from your Zyxel Device.

2. JavaScript (enabled by default).

3. Java permissions (enabled by default).

Follow these steps to access the configurator:

1. Make sure your Zyxel Device hardware is properly connected.

2. Launch your web browser. If the Zyxel Device does not automatically re-direct you to the login screen, go to http://192.168.1.1.

3. A password screen displays. Select your preferred language.

4. To access the administrative Web Configurator, type the default username admin and the randomly assigned default password (see the device label) in the password screen and click Login. If you have changed the password, enter your new password and click Login.

5. The first time you log in, a screen will prompt you to change your password. Enter a new password, retype it to confirm, and click Change password. If you prefer to use the default password, click Skip.

If your ZYXEL VMG3927-BX0A does not turn on, follow these steps:

1. Make sure the Zyxel Device is turned on.

2. Make sure you are using the power adaptor or cord included with the Zyxel Device.

3. Make sure the power adaptor or cord is connected to the Zyxel Device and plugged in to an appropriate power source. Make sure the power source is turned on.

4. Turn the Zyxel Device off and on.

5. If the problem continues, contact the vendor.

If an LED is not behaving as expected, please follow these steps:

1. Make sure you understand the normal behavior of the LED by consulting the user guide.

2. Check the hardware connections.

3. Inspect your cables for damage. Contact the vendor to replace any damaged cables.

4. Turn the Zyxel Device off and on.

1. The default LAN IP address is 192.168.1.1.

2. If you changed the IP address and have forgotten it, you might get the IP address by looking up the default gateway for your computer. In most Windows computers, click Start > Run, enter cmd, and then enter ipconfig. The IP address of the Default Gateway might be the IP address of the Zyxel Device.

3. If this does not work, you have to reset the device to its factory defaults.

1. See the cover page of the user guide or the device label for the default login names and associated passwords.

2. If those do not work, you have to reset the device to its factory defaults by pressing the RESET button.

1. Make sure you are using the correct IP address. The default is 192.168.1.1.

2. Check the hardware connections, and make sure the LEDs are behaving as expected.

3. Make sure your Internet browser does not block pop-up windows and has JavaScripts and Java enabled.

4. If possible, try logging in from another interface (like Telnet) and check the service control settings for HTTP and HTTPS (Maintenance > Remote MGMT).

5. Reset the device to its factory defaults and try to access it with the default IP address.

6. For advanced troubleshooting:

– Make sure you have logged out of any earlier management sessions using the same user account.

– Try to access the Zyxel Device using another service, such as Telnet. If you can access it, check the remote management settings and firewall rules to find out why it does not respond to HTTP.

1. Make sure you have entered the password correctly. The field is case-sensitive, so make sure [Caps Lock] is not on.

2. You cannot log in to the web configurator while someone is using Telnet to access the device. Log out of the other session or ask the person who is logged in to log out.

3. Turn the Zyxel Device off and on.

4. If this does not work, you have to reset the device to its factory defaults.

1. Check the hardware connections, and make sure the LEDs are behaving as expected.

2. Make sure you entered your ISP account information correctly in the Network Setting > Broadband screen. These fields are case-sensitive.

3. If you are trying to access the Internet wirelessly, ensure the wireless LAN is enabled on both the Zyxel Device and your wireless client, and that the wireless settings match.

4. Disconnect all the cables from your device and reconnect them.

5. The Ethernet WAN connection has priority over the DSL connection. If you’re using both, ensure the Ethernet WAN is connected to a modem or router with internet access. If not, remove the Ethernet cable.

6. If the problem continues, contact your ISP.

The following factors may cause interference:

Obstacles: walls, ceilings, furniture, and so on.

Building Materials: metal doors, aluminum studs.

Electrical devices: microwaves, monitors, electric motors, cordless phones, and other wireless devices.

To optimize the speed and quality of your wireless connection, you can:

Move your wireless device closer to the AP if the signal strength is low.

Reduce wireless interference from other wireless networks or electronics.

Place the AP where there are minimum obstacles between the AP and the wireless client.

Reduce the number of wireless clients connecting to the same AP simultaneously.

Try closing some programs that use the Internet, especially peer-to-peer applications.

1. Disconnect the USB device.

2. Reboot the Zyxel Device.

3. If you are connecting a USB hard drive that comes with an external power supply, make sure it is connected to an appropriate power source that is on.

4. Re-connect your USB device to the Zyxel Device.

1. Disconnect the Ethernet cable from the Zyxel Device’s LAN port or from your computer.

2. Re-connect the Ethernet cable.

If the Local Area Connection icon for UPnP disappears in the screen, restart your computer.