I meant the "Störsicherheit" options.
Oh, I forgot the power supply of the 7390 itself
- it also could be defective or (maybe) too weak (meaning you got a wrong one).
*edit* Ah, another thing: Is your signature correct ("
Router: Fritz 7390 fw84.04.83"), meaning did you go back to an older firmware or do you use the current FW or this DSL laboratory FW?
I remember two more stories for the category "you can't blame the firmware for that":
I had read (some months ago) about a DSL user who nearly went mad because his DSL always had resyncs at certain times. Of course every time a technician visited him the problems didn't occur.
So he build a small EM detector (basically a pocket radio) and, after some days, he located the source.
The problems occured when one of his neighbours turned on his PC to check mails and other stuff (he had problems with his DSL also but never waste a thought about that).
The problems were gone after the neighbour replaced the power supply of his PC.
I had a woman in my Everquest guild which had (maybe still has) problems with her phone line: There's a break in the outdoor cable which doesn't make the DSL line completely unuseable (has something to do with high frequency physics when the signal doesn't need an intact wire connection and can "jump" over a small gap via RF) but sometimes the DSL connection get hiccups.
Unlucky for her, there is / was no free (or intact) wire pair in the cable for switching over.
//HSishi