What is a DID number?

From the perspective of a customer or client, a direct-dial number looks like any standard telephone number. However, DID is a virtual number that goes directly to an extension or location in your company. Think of it as a shortcut phone line.

These direct-dial phone numbers point inbound calls to an organization’s phone system. The function of relaying callers to an individual user makes that number “direct.” This dedicated call routing is managed by the VoIP phone system.

 

What is a DID number?

From the perspective of a customer or client, a direct-dial number looks like any standard telephone number. However, DID is a virtual number that goes directly to an extension or location in your company. Think of it as a shortcut phone line.
These direct-dial phone numbers point inbound calls to an organization’s phone system. The function of relaying callers to an individual user makes that number “direct.” This dedicated call routing is managed by the VoIP phone system.

How does DID Work?

Traditionally, DID works in one of two ways: through Public Switched Telephone Network (PSTN) lines or Voice over Internet Protocol (VoIP). Let’s start with PSTN.

Direct Dialing on PSTN

First, a telephone service provider connects a set of trunk lines to the customer’s hosted PBX. Next, a provider allocates a block of phone numbers and assigns these to the customer as their direct-dial numbers.