Description Yeastar B2 Module  The Yeastar B2 Module is a versatile expansion module designed to enhance the functionality of Yeastar S-Series IP PBX systems by adding ISDN BRI connectivity. Compatible with Yeastar models like S20, S50, S100, and S300, this module integrates seamlessly into your PBX system to support two BRI ports, allowing for up to four simultaneous calls over ISDN networks. The B2 Module is ideal for businesses that rely on ISDN technology or are transitioning to VoIP systems while maintaining their ISDN connections. It supports both TE (Terminal Equipment) and NT (Network Termination) modes, offering flexibility for various network setups. With advanced features such as echo cancellation, noise suppression, and support for multiple…