Yeastar PBX Modules
The Yeastar Expansion Cards provide essential hardware modularity for the S-Series and P-Series IP PBX ecosystems, allowing network engineers to customize telephony interfaces based on specific local infrastructure requirements. These components facilitate the integration of analog, digital, and cellular trunks into a unified communications framework. By utilizing a modular design, the PBX base units remain highly scalable and adaptable to changing business needs. Consequently, IT professionals can expand system capacity without replacing the entire chassis. This architecture supports a hybrid environment where legacy hardware connects seamlessly with modern Voice over IP protocols. Each module undergoes rigorous testing to ensure signal integrity across various line conditions and impedances.
Key Features
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Interface Versatility
These modules support a wide range of physical connections including FXS, FXO, BRI, GSM, 3G, 4G LTE, and E1/T1/PRI interfaces. -
Specific Connectivity Modules
- O2 Module: Features 2 FXO ports for connecting analog PSTN lines to the PBX.
- S2 Module: Features 2 FXS ports for connecting analog telephones or fax machines.
- SO Module: Unique hybrid port with one FXO and one FXS for power failure circuit protection.
- GSM/4G Modules: Enable cellular trunking for voice calls and SMS data redundancy.
Specifications
| Feature | Specification |
|---|---|
| Compatibility | S20, S50, S100, S300, P550, P560, P570 |
| Slot Type | Internal Expansion Slot / EX08 / EX30 |
| Cellular Support | 850/900/1800/1900 MHz (GSM), LTE FDD/TDD |
| Echo Cancellation | ITU-T G.168 LEC compliant |
What’s in the Box
- Yeastar Module Hardware Component
- Static Shielding Packaging
- Installation Standoffs (where applicable)
Why Choose Yeastar Modules
- The plug-and-play design simplifies the provisioning of new hardware interfaces without requiring extensive software reconfiguration.
- Additionally, these components allow for precise port density management, reducing the total cost of ownership for growing enterprises.
- The high-reliability circuitry ensures consistent uptime and clear voice transmission across all supported signaling protocols.






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