Im trying to get my vigor 120 modem connectinng to bethere then working with my linksys wrt54g router however im really really struggling.

Ive applied the setting as follows to the modem

MPoA (RFC1483/2684) - Enable
Encapsulation - 1483 Bridged IP LLC
VPI - 0, VCI - 101
Modulation - Multimode

then in the lan settings ive disabled DHCP (im guessing i need to do this so the linksys can work as the dhcp server??) and put the address's i was given by bethere
IP Address: 94.194.34.111
Subnet Mask: 255.255.248.0

then i connect the linksys wrt54g but im unsure what to set it as do i enable DHCP on teh linksys ? do i set the linksys as a gateway and set a static route to 94.194.34.111 ?

any help would be much appreciated

You need to set the linksys to PPPoE and put in username/password...but you will have to ask on a Linksys forum of how to do that probably...

thanks i will ask.. in terms of the vigor modem do i enable or disable DHCP?

Admin is incorrect - I'm on O2 (essentially the same as BeThere) and there are no usernames to configure.

You configure the Vigor120 for MPoA Bridged (your settings are correct, although Modulation may vary according to the speed/package you have - for a 20Mbps package you would specify ADSL2+ annex M, for lower speeds you may want just ADSL2+ without annex M).

Disable DHCP on the Vigor 120 if you plan on using DHCP, let the Linksys manage the addresses (either leave the DHCP DNS fields blank on the Linksys so that your network clients resolve domain names against your WRT54G DNS cache, or specify the BeThere DNS addresses and bypass your WRT54G cache).

On the Linksys select "Static IP" in Internet Setup and specify the static IP address, gateway and DNS details you have been given by BeThere.

If you want to access the Vigor 120 management interface on the same subnet as your Linksys, give the Vigor 120 a LAN IP network address of 192.168.0.254/255.255.255.0 and your Linksys a network IP address of 192.168.0.1/255.255.255.0, then connect the Vigor 120 WAN port to a LAN port on the Linksys, and finally connect a patch cable from a second LAN port on the Linksys to the Linksys WAN port. Now you should be able to access the Vigor120 Management interface on 192.168.0.254 and your Linksys on 192.168.0.1, with all internet access bridged from the Linksys to the Vigor and out to the internet.