Yeastar B2 Module — 2‑Port ISDN BRI Expansion Module
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.
Description
Yeastar B2 Module — Dual BRI (ISDN) Ports for PBX Expansion
The Yeastar B2 Module is a compact and reliable 2-Port ISDN BRI expansion module designed to enhance the telephony capabilities of compatible Yeastar VoIP gateways and PBX systems. By adding ISDN BRI connectivity, the B2 Module enables integration with digital ISDN networks, providing businesses with flexible voice and data communication options where traditional analog or SIP trunks need augmentation.
Featuring two independent ISDN BRI ports, the module supports digital voice trunking, ISDN-based data services, and smooth interoperability with IP-PBX systems. Its seamless integration ensures efficient call routing, robust signaling support, and enhanced network flexibility — making it ideal for offices, branch sites, retail environments, and business continuity applications.
Whether deployed as a primary BRI trunk, a backup for SIP/PSTN connections, or as part of a hybrid telephony strategy, the Yeastar B2 Module delivers dependable performance, simplified installation, and expanded trunking options for modern communication infrastructures.
Key Features:
2 × BRI Ports: Adds two digital ISDN BRI interfaces (each with two bearer channels) for voice/data.
NT & TE Mode Support: Flexible configuration to act as either network termination or terminal equipment.
Broad Compatibility: Works with Yeastar S‑Series PBX (e.g., S20, S50, S100, S300) and P‑Series PBX (P550, P560, P570) when paired with an EX08 expansion board.
Multiple ISDN Channels: Each BRI port supports two simultaneous calls (typical BRI bearer channels), enabling up to four concurrent voice/data channels.
Seamless Integration: Easily installs into module slots on compatible Yeastar PBXs and is managed through the PBX web interface.
Compact Modular Design: Uses existing PBX expansion infrastructure without requiring external hardware.
Hardware & Technical Specs:
Module Type: VoIP telephony expansion module
Port Type: 2 × ISDN BRI (RJ11/RJ12 as applicable)
BRI Channels: Each port gives two BRI bearer channels (typically 2 × 64 kb/s) and a 16 kb/s data channel for signaling.
Mode Support: NT (Network Termination) and TE (Terminal Equipment)
Compatibility: S‑Series and P‑Series Yeastar PBXs with modular expansion support (via EX08 or similar).
Installation: Hot‑plug into expansion board slot (e.g., EX08) — powered through PBX chassis.
Management: Configurable through the Yeastar PBX web admin portal.
Technical Datasheet
You can download the full technical documentation for this product from the link below:
Download PDF Datasheet
