New Draytek 120 ADSL Modem with Ethernet port

The latest is the family of Draytek Adsl modem family is the 120. This replaces the earlier 100 and 110 units which I’ve used in various configurations to provide multiple adsl connections to another device such as a Vigor 3300 for load balance or contingency configuration. The basic idea is that you can link up to 4 of these – in the case of the 3300 and use the links for various purposes – say one for client browsing , one for LAN to LAN vpns and one for mail delivery and ftp. The 3300 provides the mechanism to enter the adsl provider details and the 120 is attached to the network infrastructure – not necessarily directly to the 3300 (which means that physically seperated adsl lines in a building can be combined in this fashion).

From Draytek’s own product literature

The DrayTek Vigor 120 is an ADSL modem with an Ethernet connection; it is not a router but a true ADSL Ethernet Modem. By providing a PPPoE to PPPoA bridge, the connected device (firewall, router or PC) can log into the Internet (your ISP) directly and have full control over the ADSL connection – that makes the Vigor 120 a unique product. You can connect any device to the Vigor 120 which has a PPPoE client facility, which includes PCs, most Ethernet-WAN routers and the Apple Airport™ but the actual connection to your ISP is still PPPoA (unlike other modems which only provide PPPoE native bridging), which is the unique feature of this product and makes it compatible with all UK ISPs, where PPPoA is used as standard.

Other ADSL Ethernet ‘modems’ use workarounds to get a public IP address ‘through’ to your secondary device/client, requiring non-standard operation and complicated dual-stage setup (modem logs in, router routes) but the Vigor 120 provides the secondary device with a real routed IP connection and the ability to fully manage the connection, making setup easy. In most cases, the Vigor 120 needs no setup or configuration – just plug it in and set up your PC or router. All login/ISP details are entered on the connected client device, not the Vigor 120.

This method also differs from using a regular ADSL router which logs in itself and then uses NAT or multiple public IP addresses to create an onward client connection for your secondary device; that is not IP Address thrifty, or introduces secondary NAT compromises. With the Vigor 120 bridge/modem, you get a true single public IP address (or multiple, if you have them) straight through to your firewall/router, which also has complete control of the ISP connection.

The physical specs of the device are

Product Specification – Vigor 120 ADSL Modem
Protocol Support:
ANSI T1.413 Issue 2
ITU-T G.992.1 G.dmt (ADSL)
ITU-T G.992.2 G.lite
ITU-T G.992.3 ADSL2
ITU-T G.992.5 ADSL2+
Annex L (READSL)
Annex M
PPPoA / PPPoE Bridging (WAN to LAN)
RFC-2684 / RFC-1483
Built-in Diagnostics (WUI / CLI)
Physical Interfaces:
RJ11 – ADSL Line
RJ45 – 10/100BaseT Ethernet (auto-sensing/MDI-X)
Power Socket (9VDC)
Operating : 0° ~ 40° C
Storage : -25° ~ 70 ° C
Humidity : 20% ~ 90% Non-Condensing
Dimensions : L162 * W192 * H33 (mm)
Power : 9VDV, 1A. AC/DC Adaptor included.
Maximum Power : 9W