VMG3312-T20A User’s Guide
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CHAPTER 1
Introducing the VMG
1.1 Overview
The VMG is a wireless VDSL router. It has a DSL port as well as a Ethernet WAN port for Internet access.
The VMG supports both Packet Transfer Mode (PTM) and Asynchronous Transfer Mode (ATM). It is
backward compatible with ADSL, ADSL2 and ADSL2+ in case VDSL is not available. The VMG also acts as
an IEEE 802.11 b/g/n access point.
Only use firmware for your VMG’s specific model. Refer to the label on
the bottom of your VMG.
The VMG works over the analog telephone system, POTS (Plain Old Telephone Service). The VMG has
one USB port for sharing files via a USB storage device or connecting a cellular dongle for a WAN
backup connection.
Note: Cellular networks refer to 3G only at the time of writing.
Note: See the product page on Zyxel’s website for the list of compatible cellular USB dongles.
1.2 Ways to Manage the VMG
Use any of the following methods to manage the VMG.
• Web Configurator. This is recommended for everyday management of the VMG using a (supported)
web browser.
1.3 Good Habits for Managing the VMG
Do the following things regularly to make the VMG more secure and to manage the VMG 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 VMG to its factory default settings. If you backed up an earlier
configuration file, you would not have to totally re-configure the VMG. You could simply restore your
last configuration.
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