ZYXEL VMG3927-BX0A (02) PDF Document

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

To make your ZYXEL VMG3927-BX0A more secure and manage it more effectively, follow these regular habits:

• 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 Zyxel 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.

Follow these steps to access the Web Configurator:

1. Make sure your Zyxel Device hardware is properly connected (refer to the Quick Start Guide).

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 the language you prefer.

4. To access the administrative Web Configurator and manage the Zyxel Device, 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 password and click Login.

5. The following screen displays when you log into the Web Configurator for the first time. Enter a new password, retype it to confirm, and click Change password. If you prefer to use the default password, click Skip.

The LED indicators on your ZYXEL VMG3927-BX0A provide information about its status. None of the LEDs are on if the device is not receiving power.

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.

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.

Note: If your Zyxel Device supports both 2.4 GHz and 5 GHz wireless networks, the connection to the 2.4 GHz wireless network has priority.

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

The table below shows how long you need to press the WiFi and WPS buttons on the ZYXEL VMG3927-BX0A.

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 or 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.

See the following table for how long you need to press the RESET button on the ZYXEL VMG3927-BX0A.

If your ZYXEL VMG3927-BX0A does not turn on and none of the LEDs are 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 one of the LEDs on your ZYXEL VMG3927-BX0A does not behave as expected, follow these steps:

1. Make sure you understand the normal behavior of the LED.

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.

5. If the problem continues, contact the vendor.

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 of the Zyxel Device by looking up the IP address of the default gateway for your computer. To do this 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 (it depends on the network), so enter this IP address in your Internet browser.

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

1. See the cover page for the default login names and associated passwords.

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

If you cannot access the login screen, follow these steps:

1. Make sure you are using the correct IP address.
• The default IP address is 192.168.1.1.
• If you changed the IP address, use the new IP address.
• If you changed the IP address and have forgotten it, see the troubleshooting suggestions for forgetting the IP address.

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 it is possible to log in from another interface, check the service control settings for HTTP and HTTPS (Maintenance > Remote MGMT).

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

6. If the problem continues, contact the network administrator or vendor, or try one of the advanced suggestions.

Advanced Suggestions

• Make sure you have logged out of any earlier management sessions using the same user account even if they were through a different interface or using a different browser.

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

1. Make sure you have entered the password correctly. See the cover page for the default login names and associated passwords. 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 Zyxel Device. Log out of the Zyxel Device in 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, so make sure [Caps Lock] is not on.

3. If you are trying to access the Internet wirelessly, make sure that you enabled the wireless LAN in the Zyxel Device and your wireless client and that the wireless settings in the wireless client are the same as the settings in the Zyxel Device.

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

5. If you’re connecting an Ethernet cable to the WAN port for Ethernet WAN connections, and an RJ-11 cable to the DSL port for DSL connections at the same time. Make sure you have the Ethernet WAN port connected to a MODEM or Router that has Internet access. If it doesn’t, remove the Ethernet cable or restore the fourth LAN port back from a WAN port to a LAN port. The Ethernet WAN connection has priority over the DSL connection. The Zyxel Device follows this rule, even if the Ethernet WAN port doesn’t have an IP for Internet connections.

6. If the problem continues, contact your ISP.

1. The DSL and Ethernet connections have priority in that order. If the DSL or Ethernet connection is up, then the cellular connection will be down.

2. Make sure you have connected a compatible cellular dongle to the USB port.

3. Make sure you have configured Network Setting > Broadband > Cellular Backup correctly.

4. Check that the Zyxel Device is within range of a cellular base station.

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 that may be caused by other wireless networks or surrounding wireless electronics such as cordless phones.

• Place the AP where there are minimum obstacles (such as walls and ceilings) between the AP and the wireless client.

• Reduce the number of wireless clients connecting to the same AP simultaneously, or add additional APs if necessary.

• Try closing some programs that use the Internet, especially peer-to-peer applications. If the wireless client is sending or receiving a lot of information, it may have too many programs open that use the Internet.

An SSID is a name that uniquely identifies a wireless network. The AP and all the clients within a wireless network must use the same SSID.

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.

Restart your computer.