What is an extension in 3CX?

An extension in 3CX serves as a unique identifier for users or devices within the VoIP (Voice over Internet Protocol) system. Each extension represents a distinct line or account that can be assigned to a specific user, phone, or device, allowing them access to the PBX system’s functionalities. This unique identifier is crucial for routing calls accurately, managing user settings, and maintaining effective communication within the organization.

The other choices, while related to telecommunications or software functionalities, do not accurately define what an extension is in the context of 3CX. Extensions are not specific models of phones, software updates, or features for making international calls; they are instead foundational elements that facilitate user interaction with the 3CX platform. Understanding the role of extensions is fundamental for configuring the system and ensuring users can communicate effectively.