Direct Inward Dialing (DID) is when a telephone service provider connects a block of telephone numbers to your company's Private Branch Exchange (PBX). It allows businesses to set up virtual numbers that can bypass the main reception lines and go directly to a desk extension or group of extensions.

DID and DOD meaning?

Direct Inward Dialing/Direct Outward Dialing (DID/DOD)

What does DID mean in call center?

Direct inward dialing (DID) is a service that local telecommunications providers offer to business customers in which the businesses can lease a large block of numbers that go over a smaller set of physical phone lines. For example, 100 phone numbers could be supported by just 8 phone lines.