Yeastar Expansion Module S2

Technical Specifications

Feature	Specification
Ports	2 x RJ11 (FXS)
Interface	Analog Internal Extension
Ring Voltage	55V RMS (Typical)
Loop Current	20mA (Typical)
Echo Cancellation	ITU-T G.168 LEC
Compatibility (S-Series)	S20, S50, S100, S300, S412
Compatibility (P-Series)	P550, P560, P570 (via EX08/EX30 Expansion Boards)
Signaling	FXS Loop Start
Dimensions	50 x 35 mm (Compact Internal Module)

Hospitality & Hotels: Perfect for connecting analog guestroom phones to a modern IP-PBX system without the need for expensive rewiring or IP handsets in every room.
Legacy Fax Integration: The most reliable way to connect a physical fax machine to your office network, ensuring stable document transmission over your VoIP system.
Cordless Mobility: Easily connect an analog cordless phone base (like a Gigaset or Panasonic) to the S2 port to give your staff mobile freedom around the office or warehouse.
Budget-Conscious Upgrades: Ideal for businesses moving to VoIP who want to phase in IP phones slowly while keeping existing analog sets operational.

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