Yeastar EX08 S-Series PBX Card / Module

The Yeastar EX08 is an interface expansion board for the Yeastar S100 and S300 IP PBX systems, used to extend telephony port capacity beyond the base unit. It carries eight external RJ11 ports and four internal module slots, with each slot accepting an optional Yeastar interface module such as the O2 (2 FXO), S2 (2 FXS), B2 (2 BRI) or a GSM/UMTS/CDMA cellular module, for a maximum of four modules and eight ports per board.

This modular design lets administrators configure the exact mix of analogue extensions, analogue trunks, ISDN BRI lines or mobile channels a deployment requires. An S100 supports up to two EX08 boards and an S300 up to three, so telephony capacity can be scaled without replacing the core PBX hardware.

As part of Yeastar’s established S-Series ecosystem, the EX08 offers a cost-effective way to grow analogue or ISDN connectivity. It suits organisations transitioning from legacy PSTN infrastructure to IP telephony while retaining existing analogue or BRI endpoints. Available from Tech Star as new or refurbished stock, supplied for business telephony deployments.