scope:

The present document specifies requirements and test methods for "xDSL over POTS" distributed filters. These filters are at the user side of the local loop in the customer premise.

• Unlike the splitters (sometimes called central splitters to distinguish them from distributed filters) described in TS 101 952-1 and TS 101 952-2, the distributed filters do not contain a high pass part. Therefore, only the low pass part is tested.

• Furthermore, the central splitters mentioned above are used as a single device at each end of the line. Distributed filters are often not used as a single device, but as multiple parallel devices. This aspect, which was not tested in a previous version of the present document (see note 5 of the Foreword and the informative Annex B), is now tested also.