Yeastar GSM Module for S Series PBX |
The Yeastar GSM Module (1‑Channel) for S‑Series PBX expands your Yeastar S-Series PBX (including S20, S50, S100, S300, and S412) with one GSM voice/SMS channel. It supports quad-band GSM frequencies for global use and integrates directly into the PBX chassis. The module enables mobile trunking, call routing through GSM, and two-way SMS functionality, making it ideal for cost-saving call management and mobile redundancy.
Key Features:
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Adds 1 GSM channel for voice and SMS
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Compatible with Yeastar S20, S50, S100, S300, and S412
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Supports quad-band GSM: 850/900/1800/1900 MHz
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Caller ID, SMS sending/receiving, and call forwarding features
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Easy plug-and-play installation
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Ideal for mobile call routing and GSM fallback in PBX setups
Let me know if you’d like similar content for the 3G/4G mod




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