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Yeastar B2 Module — 2‑Port ISDN BRI Expansion Module
Yeastar B2 Module — 2‑Port ISDN BRI Expansion Module
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Yeastar B2 Module — 2‑Port ISDN BRI Expansion Module

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The Yeastar B2 Module is a modular ISDN BRI expansion card that adds dual BRI (NT/TE) ports to compatible Yeastar VoIP PBX systems — ideal for integrating digital ISDN lines and channels into hybrid telephony deployments.
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