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Welcome to the ZyXEL Networking Glossary - your definitive source for descriptions of networking terms and ZyXEL's product features.

Select a letter or use the search box to look up a term.

    DND

    Do Not Disturb (DND) is a telephone feature that allows you to block incoming calls. If there are certain numbers you don't want to block, you can add them to a whitelist (even when DND is on, calls from numbers on the whitelist are allowed).