Yeastar SO Module


Telephony Modules and Expansion Boards

Yeastarย P-Series PBX Systemย andย S-Series VoIP PBXย provide flexible telephony interfaces combination while allowing for future scalability with unique modular design. Besides the built-in rich SIP capabilities, you can decide what types of extensions and physical trunks you need in your telephone system. When your business expands, more uses and concurrent calls can also be added easily to meet growing business needs.


Add Telephony Modules

All the telephony interfaces are modular and customizable, whether itโ€™s FXS, FXO, ISDN BRI/PRI, or GSM/3G/4G.
S100, S300, P560, P570 require the combination of the Expansion Board and Telephony Modules to add interfaces.

  • S20 has 2 onboard module slots.
  • S50, S412, and P550 have 4 module slots.
  • P560 allows 1 Expansion Board.
  • S100 and P570 support 2 Expansion Boards.
  • S300 supports 3 Expansion Boards.

EX08 has 4 onboard module slots and 8 interfaces on the panel.
Supported Model: S100, S300, P560, P570

EX30 has 1 onboard E1/T1/PRI port.
Supported Model: S100, S300, P560, P570

Expand System Capacity

D30 Module

Add 100 VoIP Users & 30 Concurrent Calls
Supported Model: S100, S300, P560, P570

Yeastar S2 module is a module with 2 FXS ports to terminate two analog telephone or fax machines. It is
compatible with Yeastar S-Series VoIP PBX.


Port 1 FXO RJ11 Port + 1 FXS RJ11 FXO Port
Supported Mode S20, S50, S100, S300
FXO Ring Frequency Detection 15~50 Hz
FXS Ring Frequency 25 Hz
Termination PSTN lines and Analog Telephone / Fax Machine
Ring Voltage 85V
Ring Voltage 85V
Failover Support
Echo Cancellation Support
Terminating Impedance Option 600 Ohm


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