Yeastar S2 module Yeastar Yeastar S-Series PBX Expansion Card

The Yeastar S2 module is a 2-port FXS (Foreign Exchange Station) expansion card designed to connect analogue telephone devices to Yeastar S-Series IP PBX systems. Each FXS port provides a standard analogue telephone interface, enabling legacy analogue phones, fax machines, or door entry systems to integrate with modern VoIP infrastructure.

This module is intended for deployment in Yeastar S-Series PBX platforms, allowing businesses to expand their analogue endpoint capacity in increments of two ports. It is particularly useful for organisations transitioning to IP telephony whilst retaining existing analogue equipment, or for connecting devices that require traditional POTS connectivity.

The S2 module slots directly into the modular bays of compatible Yeastar S-Series systems, offering a straightforward method to scale analogue capacity without replacing the core PBX hardware. This makes it a practical choice for small to medium-sized deployments where a mix of IP and analogue endpoints is required.

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