Directory Number Hunting
Is a telephony service allowing the distribution of telephone calls from one telephone number in the group consisting from several telephone lines, using the special algorithm, which determines the line receiving a call.
In the past, when you call an office building or business, you would either be transferred to the department you want to talk to, or given their extension number. This extension is usually a 2-3 digit code that when dialed, transfers you automatically to the particular person or department you want to speak with. The reason why this code works is because it is programmed into a PBX system.
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