You need to check at your ISP's technical support to get the correct parameters and settings such PPPoE or LLC bridged you mentioned for your adsl connection because each one may works different ...also i am not with BT but as far i know they are using PPPoA
If you have settings with LLC bridged with cisco / juniper etc i would say before the upgrade (if you will) to get some help from the person did set it up first time for you because as mentioned below the upgrade may delete all your current settings if your 120 v2 was set especially for the cisco/juniper server
if you have the v2 then latest firmware upgrade it is the 3.2.6 ... maybe is worth to try it
To find out if you have the v2 it saying under the modem at the sticker next of the model ... example model: vigor 120 v2 ... if is not stating the v2 then is the v1 model
If you will update to the next firmware, is recommended to use the file with ending *RST* ... this is because to avoid previous firmware bugs or conflicts and to help run smoother, compare with the *ALL* file
Of course you can use the *all* file during the next firmware upgrade but there is a chance, possible previous firmware bugs to carry on with next firmware ... this is up to you which file to use ... personal i recommend the *rst* to be a clean/fresh installation
You can write down your current settings before the upgrade and then after to set them back manually because the *rst* file will delete all settings and will set to factory defaults
You can also perform a backup file to keep it at your archive for any future problem
However changing modem codes between same firmware (example 3.2.6) to see which one will work better and more stable for your current adsl connection, the *ALL* file is the best where it will keep all previous settings
If is too trouble to do all these ... then leave it as it is ... and just use any modem code from your current firmware 3.2.4.4 ... and just use the *all* file where will keep current settings
ftp://ftp.draytek.com/Vigor120%20V2/Firmware/V3.2.4.4/
