Z-330CWA ANSI single line DSL filter. High performance in-line Z-BLOCKER filter meets strict performance standards of the American National Standards Institute (ANSI T1.421). Provides excellent voice quality, a DSL convenience jack for connecting a DSL or HPN device, works with any single line phone/fax machines/automatic dialers, and blocks interference between voice and DSL/HPN. Snaps over existing wall phone jack and tools are required.
Z-BLOCKER is a registered trademark of Excelsus Technologies, Inc.