The versatility of all Fritz! Box models and is known for fax reception with ISDN there outside the Fritz! Box series few alternatives. However, it is disappointing how bad the DSL modem 7170. We live in the DSL outskirts and got a DSL2000 RAM management on a daily basis between 600 kbit up (rarely) 1.9 MBit. Now I have the 7170 exchanged for a 7270 and have since been stable 2.3 MBit.
In retrospect, really frustrating that I had to buy a model with DECT although I do not use that. Just because I want to have a good DSL modem in a Fritz! Box.