Issabel is built on Asterisk, one of the world’s most powerful and flexible VoIP engines. This means that, beyond the intuitive graphical interface Issabel provides, integrators and developers can directly access Asterisk’s native interfaces — AMI, AGI, and ARI — to extend and customize PBX functionalities for more advanced use cases.
Here’s what each interface offers and how to leverage them in your projects.
What is it?
A socket-based interface designed to monitor and control PBX events and actions in real time.
What can you do with Issabel?
Real-world example:
A CRM launches an outbound call from an agent’s phone when the user clicks on the customer’s phone number.
✅ Enabled by default in Issabel
⚙️ Complexity level: Medium
💼 Ideal for: Real-time integrations, click-to-call functionality.
What is it?
An interface that lets you run external scripts as part of a live call, integrated into the dialplan.
What can you do with Issabel?
Real-world example:
A call center verifies a caller’s ID against a database before routing the call to an agent.
✅ Enabled by default in Issabel
⚙️ Complexity level: Medium
💼 Ideal for: Dynamic IVRs, external validation, advanced logic flows.
What is it?
A modern REST API that gives full control over calls, media, and applications built on Asterisk.
What can you do with Issabel?
Real-world example:
An integrator builds a microservice that detects incoming calls and dynamically routes them based on external business rules — all through ARI.
❌ Not enabled by default in Issabel (requires advanced setup)
⚙️ Complexity level: Advanced
💼 Ideal for: Custom VoIP apps, full media control, advanced development.
| Interface | Enabled in Issabel? | Complexity | Ideal Use Cases |
| AMI | ✅ Yes | Medium | Real-time integrations, click-to-call |
| AGI | ✅ Yes (used in IVRs) | Medium | Dynamic IVRs, external lookups |
| ARI | ❌ No (manual setup) | Advanced | Custom VoIP apps, media control |
“I am honored to recognize Issabel, LLC with a 2023 Product of the Year Award for its commitment to excellence and innovation,” said Rich Tehrani, CEO, TMC.
Issabel® is developed and managed by Issabel® LLC. company formed by a group of professionals from different countries.
Our team is a leader in open source innovation with implementations and success stories in different continents. Our experience in developing these technologies has allowed us to develop, maintain and improve unified communications platforms.
