What feature allows 3CX to interact with external CRM systems?

The feature that allows 3CX to interact with external CRM systems is the use of APIs and plugins that provide integration capabilities. APIs (Application Programming Interfaces) are crucial for enabling communication between different software applications, allowing data to be exchanged seamlessly. In the context of 3CX, using APIs allows it to connect with various CRM systems, facilitating functionalities such as call logging, contact management, or customer information retrieval directly from within the CRM interface.

Additionally, plugins can extend the capabilities of 3CX by adding specific features or integrations tailored to the CRM system in use, which enhances the overall workflow and user experience. This integration empowers businesses to streamline their processes, improve customer interactions, and maintain organized records without the need to switch between multiple applications.

The other options, while valuable in their own right, do not function as the primary means of integration with external systems. Built-in chat functionality relates to internal communication, automated email responders handle email interactions, and voicemail transcriptions offer voicemail management, but none provide the direct integration capabilities with CRM systems that APIs and plugins do.