What is a Yeastar O2 Module?

The Yeastar O2 Module is a hardware component designed for integration into Yeastar PBX systems, It is specifically used for handling analog phone lines. It features 2 FXO (Foreign Exchange Office) ports. The 2 FXO (Foreign Exchange Office) ports allow the PBX to connect to and interact with traditional analog Public Switched Telephone Network (PSTN) lines.

It adds two FXO (Foreign Exchange Office) ports to the PBX, allowing the system to connect to two analog PSTN (Public Switched Telephone Network) lines. This module is commonly used in hybrid telephony setups where both VoIP and analog lines coexist, providing flexibility and reliability.

Key Features

Two FXO Ports

These ports connect the PBX to external analog lines, enabling the system to send and receive calls through traditional PSTN.

Compatibility

Works seamlessly with Yeastar PBX models, such as S20, S50, S100, S300, and P-Series systems.

Hot-swappable

The module can be installed or replaced without shutting down the PBX system, minimizing downtime.

Echo Cancellation

Built-in echo cancellation improves call quality by reducing acoustic feedback often encountered in analog telephony.

Signaling Support

Supports loop start signaling and other standard analog telephony features like caller ID detection and busy tone detection.

Installation and Configuration of the Yeastar O2 Module

The Yeastar O2 module is designed for straightforward installation:

• Step 1: Insert the module into an expansion slot of the compatible PBX system.
• Step 2: Use the PBX’s web-based interface to configure the new FXO ports.
• Step 3: Connect standard telephone cables from the module’s FXO ports to the PSTN lines.

Once installed, the module integrates seamlessly, offering flexible routing options, such as automatic call routing and PSTN fallback.

How does the Yeastar O2 Module work?

The Yeastar O2 Module operates as a functional bridge between a Yeastar PBX system and traditional analog Public Switched Telephone Network (PSTN) lines. Here’s a detailed look at how it works:

Physical Connection of Yeastar O2 Module

The O2 module is equipped with two FXO (Foreign Exchange Office) ports. These ports connect directly to standard analog phone lines provided by the telephone company. Each port corresponds to one PSTN line.

Installation: The module is inserted into an available expansion slot in a Yeastar PBX system, such as the S-Series or P-Series.

RJ11 Interface: The analog phone lines are connected to the FXO ports using RJ11 cables.

Call Handling and Routing

Once installed and configured, the O2 module enables the PBX to manage analog lines for both inbound and outbound calls:

Inbound Calls: When a call comes in on a PSTN line, the module routes it to the PBX, which then forwards the call to the appropriate internal extension, group, or VoIP endpoint.

Outbound Calls: Users can place calls over the PSTN through the FXO ports. The PBX determines whether a call should go through the analog line or another route (like VoIP) based on its dial plan.

PSTN Failover

One of the critical functions of the O2 module is its fallback capability. If the primary VoIP service or internet connection goes down, the PBX automatically routes calls through the PSTN lines connected to the FXO ports, ensuring continuous service.

Echo Cancellation

To improve call quality, the O2 module features built-in echo cancellation. This minimizes the echo effect often experienced during analog calls, ensuring clear voice communication.

Signaling and Tone Detection

The module supports Loop Start Signaling: A common signaling method for initiating and receiving calls on analog lines.

Busy Tone Detection: Recognizes busy signals to terminate calls correctly.

Caller ID Detection: Displays caller information for incoming calls, depending on PSTN support.

Configuration and Management

The O2 module works seamlessly with Yeastar PBX systems through a web-based management interface. Administrators can configure the following:

Dial Plans: Define rules for routing calls via the FXO ports.

Line Preferences: Set priority for calls to use PSTN or VoIP lines.

Call Monitoring and Logs: Track usage, call statistics, and troubleshoot issues.

Use Cases of Yeastar O2 Module

Small and Medium-Sized Businesses (SMBs): Provides a cost-effective way to connect to analog lines without losing the advanced features of a PBX.

Fallback Solution: Ensures business continuity by offering a PSTN fallback in case of VoIP outages.

Hybrid Systems: Perfect for organizations transitioning from analog to VoIP, enabling them to leverage both technologies simultaneously.

Conclusion

The Yeastar YST-O2-2 FXO Ports O2 Module is a robust solution for businesses that require reliable analog line connectivity within their PBX system. Its dual FXO ports, combined with advanced features like echo cancellation and easy integration, make it an ideal choice for organizations balancing traditional telephony with modern VoIP solutions.