A few days ago I placed my AVM Fritz! Box 7270 to another location. When connecting the Y cable I have not looking too closely. The Y-cable connects the splitter ( DSL, cable black) and the NT ( Office: ISDN, analog telephone, cable gray) with the FritzBox ( gray cable). Also a big ball of gray network cable was still around with. So it came as it had come, I have interchanged the two gray ends of the Y cable. The result: DSL worked perfectly, but my DECT phones connected to the FritzBox could not contact the build fixed-line and take course no incoming phone calls. The documentation of AVM: My phone rings for incoming calls, not to the landline phone number. What can I do? and I can not make phone calls to build on the fixed network. What can I do? is not listed this issue, unfortunately. The Y-cable should have at its three ends of one per different color coding, this could not happen so easily such a mistake.
