Yeastar SO Module
1 FXO + 1 FXS Port Module with PSTN Failover Support
Yeastar SO Module is a dual-port module featuring one FXO and one FXS port, specially designed to offer automatic PSTN failover for uninterrupted communication. In case of power loss or system failure, it ensures continuity by directly bridging analog phones to PSTN lines. Compatible with Yeastar S-Series and P-Series PBX systems, this module enables reliable voice communication through built-in echo cancellation and support for both PSTN lines and analog telephone or fax devices.
Key Features:
- 1 FXO + 1 FXS port with auto failover function
- Ensures call continuity during power outage
- Supports analog phones, fax, and PSTN lines
- Built-in echo cancellation and impedance adjustment
- Compatible with Yeastar S and P-Series PBX models
Product Specifications:
- Model: SO Module
- Port Type: 1 × FXO RJ11, 1 × FXS RJ11
- Supported PBX Models: S20, S50, S100, S300, P550, P560, P570
- FXO Ring Frequency Detection: 15–50 Hz
- FXS Ring Frequency: 25 Hz
- Ring Voltage: 85V
- Termination Support: PSTN lines and analog telephone/fax
- Failover Function: Supported
- Echo Cancellation: Supported
- Terminating Impedance: 600 Ohm
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