Families and small offices can as cost and above all reliable (as many potential sources of error distributed connectors are) connect multiple devices with an ISDN connection and do not have equal access to a telephone system. Simply snap them together, assign MSNs and finished it.
But even if more system telephones to be connected to a telephone system (as an example Auerswald Compact 5020 and Auerswald COMfortel 2500 (AB)), but less trunks available as telephones - but a call each other should be guaranteed beyond - then can this adapter offer a great distribution (in this case, however, please check the performance values of the plant pay, may need the phones then own power supply power supplies).
Processing is indeed plastic, but neat and functional. The well-built lightning I hold true for advertising Technically OK, but a real lightning protection can mimic this very, very limited offer. As "Accessories" is a 3m long ISDN cable to connect the adapter with the ISDN line.
Since this is a practical (ISDN) accessories, which is processing technically convincing and priced okay, I forgive 5 Stars.