Yeastar Expansion Module B2
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Yeastar Expansion Module B2

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Technical Specifications: Yeastar B2

Feature Specification
Ports 2 x BRI (S0) Ports
Interface RJ45
Channels 4 Concurrent Channels (2 per Port)
Protocol Support Euro-ISDN (DSS1)
Connection Mode TE (Terminal Equipment) or NT (Network Termination)
Compatibility (S-Series) S20, S50, S100, S300, S412
Compatibility (P-Series) P550, P560, P570 (via EX08/EX30 Expansion Boards)
Dimensions 50 x 35 mm (Compact Internal Module)

Ideal For:

  • Businesses with Existing ISDN Infrastructure: Perfect for companies that already have a contract for BRI lines and want to upgrade their PBX hardware without changing their service provider.

  • High-Stability Voice Requirements: Ideal for law firms, financial institutions, and medical offices where call drops or “internet-related” audio issues are not acceptable.

  • Hybrid Communication Strategies: Use BRI lines for your primary incoming business number and SIP trunks for low-cost international outgoing calls.

  • Redundancy & Failover: Configure the B2 module as a backup—if your primary fiber internet goes down, your office can still make calls via the digital BRI lines.

The Yeastar B2 Module is a specialized expansion component designed to add digital ISDN (Integrated Services Digital Network) connectivity to your Yeastar S-Series or P-Series PBX. Featuring two BRI (Basic Rate Interface) ports, the B2 module allows your system to interface directly with digital landlines provided by local telecommunications carriers. This is an essential hardware upgrade for businesses that require high-stability digital voice channels while maintaining the advanced features of a modern VoIP PBX.

Each B2 module provides two RJ45 ports, supporting a total of four concurrent digital voice channels (2 channels per BRI line).

Allows businesses to maintain their existing, reliable digital trunk contracts while transitioning the rest of the office to IP-based handsets and mobile apps.

Designed for “plug-and-play” installation into the expansion slots of Yeastar S-Series (S412, S20, S50, S100, S300) and P-Series (P550, P560, P570) systems.

SKU: B2 Categories: , Tags: , , Brand:

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