Direct Inward Dialing (DID) numbers are virtual phone numbers assigned to a company’s private branch exchange (PBX) system, allowing external callers to directly reach specific extensions without going through a receptionist or an automated menu.
DID numbers work by leveraging VoIP (Voice over Internet Protocol) or PSTN (Public Switched Telephone Network) to route calls to designated extensions, departments, or individuals within an organization. These numbers do not require a dedicated physical phone line for each number.
1. Direct Call Routing – Calls can be routed to specific employees, departments, or call center agents.
2. Scalability – Businesses can add or remove numbers without installing new physical lines.
3. Global Reach – Organizations can have local DID numbers in different countries while answering calls from a centralized location.
4. Cost-Effective – Reduces the need for multiple phone lines while allowing better call distribution.
5. VoIP & SIP Trunking Integration – Works with cloud PBX systems, allowing flexible and feature-rich communications.
DID numbers play a crucial role in modern business telephony, particularly for companies like TELSIP, which specializes in Cloud PBX, Call Centers, and SIP-based communication solutions.
