Expansion card Yeastar EX08 — 8 ports, 4 slots for S2 O2 SO BRI GSM

Yeastar EX08 is an expansion card that adds eight telephony ports and four flexible module slots for S2, O2, SO, BRI and GSM interfaces. Designed to extend the connectivity of compatible Yeastar PBX systems, the module increases the number of available analog, digital or wireless channels to support growing line capacity and diverse deployment requirements in small and medium business environments.

Advantages

The expansion card delivers a compact way to expand telephony capacity without replacing the main PBX, offering modular flexibility through four slots that accept S2, O2, SO, BRI or GSM modules. Installation keeps cabling and rack space requirements low while enabling additional concurrent calls and integration of mobile networks where needed. Compatibility with Yeastar platforms ensures coordinated signaling and management for unified configuration and monitoring.

Suitable for

• Small to medium business PBX expansions where extra analog or digital trunks are needed
• Deployments requiring integration of GSM channels for mobile failover or outbound routing
• Offices that need flexible port configuration to mix BRI, SO, S2 or O2 interfaces
• Service providers or installers managing multiple lines on a single PBX chassis

Key specifications

• Number of ports: 8 telephony ports
• Module slots: 4 flexible slots for interface modules
• Supported interface types: S2, O2, SO, BRI, GSM
• Form factor: expansion card for compatible Yeastar systems
• Typical use: increases channel/trunk capacity and adds mobile connectivity options

How to use

Install the EX08 expansion card into a compatible Yeastar PBX chassis following the vendor’s installation procedure. Populate the four module slots with the required interface modules (S2, O2, SO, BRI or GSM) according to line and network requirements, then connect external trunks or antennas as applicable. After physical installation, configure the new ports in the PBX web interface or management console to assign trunks, routing rules and call handling parameters.

Usage recommendations

Ensure firmware on the main PBX is up to date and verify module compatibility before installation. Use appropriate surge protection and follow local regulations for connecting analog, digital and GSM lines. For GSM modules, position antennas to achieve reliable signal strength and test call routing and failover behavior after configuration.