Tag: Corded
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at t Two-line Corded Telephone ML17939/ML17959 User Guide
at t Two-line Corded Telephone ML17939/ML17959 Installation preparation If you subscribe to high speed Internet service (DSL – digital subscriber line) through your telephone line, you must install a DSL filter between each telephone line cord and telephone wall jack (pages 4 and 5). The filter prevents noise and caller ID problems caused by DSL…