For some time now I have multiple adapters of types XAVB2501 and XAVB2001 in use and am very satisfied with this. Since I wanted to but parallel span a WLAN in another corner of the house, the use of XAVN2001 was close. But since the problems were going on: The Extender was not to persuade, to mate with one of the upper already in use adapter by non-standard keys. Well, so without further ado installed the Powerline Utilities and manually assign all adapters in the house a new key, then closed the coupling. Setting Now only the data of the WLAN. Easier said than done, because the Extender refused to accept the settings. After several attempts, I managed that the Extender moved an IP address and via web interface was reached, so I was able to configure the wireless network. The Powerline Utility refuses Although still display the WLAN data to accept name changes or sometimes even find equipment, but after these hurdles were taken and I have the Extender assign a fixed IP address, the device now works perfectly. In this context: It did not succeed with so far to perform at one of XAVB2501 a firmware update because the software appears to be similar in error.