• Unique module featuring 1 FXS port and 1 FXO port combined
• Integrated PSTN Fallback function for emergency calling protection
• Allows making and receiving calls even during system power failure
• Connects one analog line and one analog phone extension simultaneously
• Compatible with Yeastar S-Series (S20, S50, S100, S300) and P-Series
• Built-in echo cancellation for improved overall audio clarity
• Cost-effective solution for small offices requiring failover security

• Ports: 1 x RJ11 FXS, 1 x RJ11 FXO
• FXO Ring Frequency Detection: 15~50 Hz
• FXS Ring Frequency: 25 Hz
• Ring Voltage: 85V
• Failover Function: Supported (Auto PSTN Fallback)
• Terminating Impedance Option: 600 Ohm
• Echo Cancellation: Supported
• Compatibility: S20, S50, S100, S300, P550, P560, P570

• 1x Yeastar SO Module
• 1x Installation Guide

• Monrovia, CA 91016
• Austin, TX 78723

Orders may be shipped with "Signature Confirmation" for your protection.

If you have any questions, please send a message using the "Contact." We normally respond within a few minutes during business hours.