Yeastar Expansion Module GSM

Technical Specifications: Yeastar GSM Module

Feature	Specification
GSM Channels	1 Channel (1 SIM Card Slot)
Network Type	850/900/1800/1900 MHz (Quad-band)
Transmitter Power	+33dBm (2W) @ 850/900MHz
SIM Card Size	Standard SIM
Antenna Interface	1 x SMA (External Antenna Included)
Compatibility (S-Series)	S20, S50, S100, S300, S412
Compatibility (P-Series)	P550, P560, P570 (via EX08/EX30 Expansion Boards)
Protocol Support	SIP, IAX2

Reducing Monthly Phone Bills: Ideal for offices that frequently call staff or clients on their mobile phones; route those calls through a SIM card instead of expensive landline-to-mobile trunks.
Remote or Temporary Sites: Perfect for construction sites, pop-up shops, or agricultural projects where fixed-line internet or copper phone lines are unavailable.
Business Continuity: A must-have for businesses that cannot afford to be “offline” during a fiber cut or ISP outage.
Mobile-First Marketing: Use a dedicated mobile number for your business that customers feel more comfortable calling or texting.

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