Can be used . All cable networks in Switzerland use EuroDOCSIS 3.0. The only problem is that there is no router freedom in Switzerland like in Germany. For some reason unknown to me, you are forced to use the China crap of the cable providers. I replaced an Arris cable router with the 6590 at my mother's house. 1) The speed of the AVM modem was about 10% higher than that of the Arris. After the learning phase of the Fritzbox (approx. 1 week) there were no more failures at all, with the Arris at least 1-2 times a week. Since the box is now the first to be connected to the network, the very good VPN tunnel of the Fritzbox works just great. I am highly satisfied with the device. But as written above, the cable providers in Switzerland are not legally obliged to allow other routers. And if the provider doesn't give out the access data, you're out of luck. I, for example, am with Rii Seez Net Buchs, a very good provider. But my questions are answered evasively or not at all. It's a real shame that you have to put up with the China stuff just because it's cheaper than a high-quality router. I would also buy a router myself, but Rii Seez Net doesn't want to. :-(
A friend of mine is with UPC. They told him that he can use a Fritzbox as a router, but they insist on your modem. So I would operate the UPC router in bridge mode and then use a 7580 or 7590 (they are more or less the same except for the DSL modem) in WAN mode. Then it doesn't have to be the CH version, as the D version is usually cheaper. As already written above, this is really sad, because the modem of the 6590 gets the most out of the cable. I would like to know what UPC tells you about the 6590. Maybe something completely different. :-)