Allow customers to directly call a specific extension on your PBX system.
CenturyLink Direct Inward Dialing service is available with switching vehicles served by trunk service (trunk side of Central Office). Answer supervision is required from the customer's PBX. Seven-digit local exchange numbers are assigned to each DID station (by PBX programming) from a block of numbers reserved for the customer. When the number is dialed, the serving Central Office directs the call to a dedicated pool of one-way incoming analog DID trunks assigned to that number block. The Central Office then outpulses the last three or four digits (depending on the customer's PBX requirements) to the PBX. The PBX routes the call directly to the called station without going to the attendant.