For about 2 years we've been using a Sinus 154 DSL SE modem to connect to our provider Kamp DSL (3096K/384K). Everything has been working perfectly until recently. All of a sudden the connection was lost and no matter what I try I can't get the modem to reconnect. The DSL indicator on the modem is on, so the T-Com line appears to be Ok. I already asked Kamp DSL to have a look at it and they claim that at some point, while I was trying to connect, the modem had a connection shortly... but still the status remains "Getrennt". Their conclusion was that there's a problem at our side.
While I was trying to connect I checked the "Logbuch Sicherheit" of the modem and I noticed a number of strange things. Here's what my latest 4 connection attempts looked like: