Yeastar O2 Module: 2-Port FXO Interface for IP-PBX Systems

The Yeastar O2 Module delivers professional analog telephone line connectivity for Yeastar IP-PBX systems. This 2-port FXO interface module enables businesses to integrate traditional PSTN lines with modern VoIP infrastructure. Organizations transitioning from legacy telephony or requiring backup connectivity will find this expansion module essential for maintaining communication continuity.

Key Features & Benefits

• Dual FXO Ports: Connects two analog telephone lines to your IP-PBX, enabling cost-effective use of existing PSTN services alongside VoIP capabilities
• Hot-Swappable Design: Install or replace the module without powering down your phone system, minimizing service interruption during maintenance or upgrades
• Universal Compatibility: Works seamlessly with Yeastar S-Series VoIP PBX systems, allowing flexible expansion as communication needs evolve
• Caller ID Support: Captures and displays incoming caller information from analog lines, ensuring proper call routing and enhanced receptionist efficiency
• Echo Cancellation Technology: Eliminates voice echo on analog connections, delivering clear audio quality comparable to digital VoIP calls

Technical Specifications

Interface Configuration

• FXO Ports: 2 analog telephone line interfaces
• Connector Type: RJ11 modular jacks
• Line Impedance: 600Ω (configurable for regional standards)

Signaling & Protocol Support

• Signaling Methods: Loop start, ground start
• Caller ID Standards: Bellcore FSK, ETSI FSK, DTMF
• DTMF Detection: ITU-T Q.23/Q.24 compliant

Power & Environmental

• Power Consumption: 5W maximum per module
• Operating Temperature: 0°C to 45°C (32°F to 113°F)
• Storage Temperature: -20°C to 70°C (-4°F to 158°F)
• Humidity: 10% to 90% non-condensing

Physical Dimensions

• Form Factor: Modular expansion card
• Dimensions: 115mm × 75mm × 20mm
• Weight: 85g

System Compatibility

• Compatible Systems: Yeastar S20, S50, S100, S300 VoIP PBX models
• Installation Method: Internal expansion slot (requires compatible chassis)

Use Cases & Applications

Legacy System Integration

Businesses maintaining existing analog phone service can integrate PSTN lines with their Yeastar IP-PBX. The Yeastar O2 Module preserves investment in traditional telephony infrastructure while enabling gradual migration to full VoIP deployment. Organizations in areas with limited broadband reliability benefit from maintaining analog backup connections.

Cost-Effective Telephony

Companies with favorable PSTN rates can route local calls through analog lines while using VoIP for long-distance communication. This hybrid approach optimizes telecommunication expenses without sacrificing call quality. The module automatically handles call routing based on configured least-cost routing rules.

Failover & Redundancy

The O2 Module provides critical backup connectivity when internet service experiences outages. Incoming calls automatically route through available analog lines, ensuring business continuity during network disruptions. For instance, medical offices and emergency service providers rely on this failover capability to maintain constant accessibility.

Fax & Alarm System Connectivity

Traditional fax machines and alarm systems requiring analog connections integrate directly through the FXO ports. The module supports T.38 fax over IP protocol, converting analog fax signals for transmission across VoIP networks. Security systems and elevator emergency phones benefit from dedicated analog line connectivity.