add-on conference
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- A service feature that allows an additional party to be added to an established call without attendant assistance. Note: A common implementation provides a progressive method that allows a call originator or a call receiver to add at least one additional party.
ATIS - Cite This Source - This Definition - attendant access loop, attendant position, dial service assistance (DSA), Directory Assistance Call Completion (DACC), fixed loop, three-way calling, toll diversion, toll switching trunk