Yeastar SO Module

Yeastar SO module is a module with one FXO port and one FXS port to offer a unique PSTN failover function, enabling you to make/receive calls even when system powers down.

• Key Features and Benefits:

  • PSTN Failover Function: Combines one FXO port and one FXS port to ensure continuous call capabilities during power outages.

  • Dual Line Termination: Supports termination for both PSTN lines and analog telephone or fax machines.

  • Audio Enhancement: Includes built-in support for echo cancellation.

  • Broad Compatibility: Compatible with Yeastar S20, S50, S100, S300, P550, P560, and P570 PBX systems.

• Technical & Physical Specifications:

  • Ports: 1 FXO RJ11 Port + 1 FXS RJ11 Port.

  • Ring Frequencies: FXO ring frequency detection of 15~50 Hz and FXS ring frequency of 25 Hz.

  • Voltage & Impedance: Ring voltage of 85V with a 600 Ohm terminating impedance option.