Yeaster GSM Expansion Module – 1 Channel.

With the Yeastar GSM expansion module, you can scale S-Series VoIP PBX. Thanks to the PBX  flexible telephony interfaces combination which allow for future scalability with such a unique modular design.

Yeastar GSM expansion module allows you to add more uses and concurrent calls easily to meet growing business needs as your business expands,  can also be added.

Features of GSM expansion Module

• 1 Channel for GSM Voice Calls
• Frequency: 850/900/1800/1900 MHz (quad-band)
• Compatible with MyPBX series and S-Series PBX.
• Supported Model: Yeaster S412, S20, S50, S100, S300, P550, P560, P570