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Tele-Communication (Telecom) Terms Glossary and Dictionary
ABDN: Attendant Blocking of Directory Number
Attendant Blocking of Directory Number (ABDN) is a feature of telephone service enables the attendant to block a DN (Directory Number) for a telephone from receiving to making calls. This is particularly useful when a caller dials the attendant DN and requests an external (long distance) call. If the caller chooses to disconnect until the attendant successfully places the call, the requesting DN becomes idle and can receive or make calls. Therefore, the requesting DN could be busy when the attendant establishes the requested call.
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