Is it possible to get a cisco 836's ADSL over ISDN interface(ATM0) to work over ADSL provided on analogue PSTN? Im based in the uk and unfortunatly we can't get ADSL over ISDN here. I need a router that has an ISDN BRI interface for tunnel backup. The next step up is a 1721 with WIC cards which is about £1000 extra than an 836!!!! :(. I do have one to test with. When I plug the router into the ADSL filter the ATM just flashes and doesnt sync up. Unlike the 837 which works fine(But that doesnt have a BRI interface). I would have thought the ATM's would have been the same but maybe not?? Perhaps they work at a different frequency or something??
Do you experts know of an alternative? Or preferably of a way I can get this to work?
Thanks a lot for any help. 500 points for this one... :)