Excelsus DSL Filter Z-Blocker Z-330W
The DSL user installs an Excelsus filter into each. telephone line jack in the subscriber's premises. that contains voice-band equipment devices,. including corded/cordless telephones, answering ... is one of many filters manufactured by Excelsus. for subscriber installed digital services within. homes, offices, and hotels. Excelsus is the. number one selling brand of DSL filters. worldwide. The Z-330W meets ANSI filter standard
