Yeastar O2 Module — 2FXO Expansion Module for PBX
The Yeastar O2 Module is a 2‑port FXO telephony expansion card that adds analog PSTN line support to Yeastar S‑Series and P‑Series IP PBX systems — ideal for bridging traditional phone lines with VoIP networks and enabling PSTN failover & routing.
Description
Yeastar O2 Module — 2‑Port FXO Expansion (PSTN Integration) for S‑Series & P‑Series PBX
The Yeastar O2 Module is a dedicated 2-Port FXO expansion module designed to enhance the telephony trunking capabilities of compatible Yeastar PBX systems and VoIP gateways. By adding two FXO interfaces, this module enables seamless connection to traditional PSTN telephone lines, allowing businesses to route inbound and outbound calls between analog public networks and modern IP-PBX platforms.
Perfect for small to medium-sized offices, branch locations, retail environments, and any setup that requires more PSTN trunk capacity, the O2 Module increases connectivity while maintaining reliable call quality. Its compact module design integrates directly with Yeastar systems, providing flexible telephony expansion without the need for standalone FXO gateway units.
With comprehensive support for industry-standard telephony features and efficient trunk routing, the Yeastar O2 Module delivers dependable voice calling and extends the communication capacity of your existing telephony infrastructure.
Key Features:
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2 × FXO Ports: Adds two FXO interfaces for terminating analog PSTN lines directly to your IP PBX system.
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Analog PSTN Support: Connect traditional phone lines for inbound/outbound calling via the PBX.
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PSTN Failover: Provides fallback voice routing over PSTN during VoIP outages or internet failures (dependent on PBX configuration).
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Echo Cancellation: Built‑in echo cancellation for clearer voice quality on analog trunks.
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Signaling Modes: Supports standard analog signaling modes such as PLAR (Private Line Automatic Ringdown) for specific use cases.
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Compatible with Expansion Systems: Works with PBXs that accept modular telephony cards (e.g., via EX08 expansion board).
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Compact & Efficient: Small module that integrates seamlessly with your existing PBX chassis.
Hardware & Technical Specs:
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Module Type: Telephony expansion card (FXO).
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FXO Ports: 2 × RJ11 FXO for PSTN line termination.
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Supported PBX Platforms:
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Yeastar S‑Series (e.g., S20, S50, S100, S300, S412)
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Yeastar P‑Series (models that support telephony modules)
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Ring Frequency & Voltage: Typical PSTN detection ranges (e.g., 15–50 Hz, 30+ VRMS).
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Echo Cancellation: G.168 or similar echo reduction support.
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Installation: Installs in a compatible module slot (e.g., through expansion board like EX08)
Technical Datasheet
You can download the full technical documentation for this product from the link below:
Download PDF Datasheet
