SunnyStar Co., Ltd Quad S400M Module

Quad S400M FXS Module

The Quad S400M is an analog FXS daughter card designed for SunnyStar TDM series telephony cards. It provides four ports to connect standard analog telephones or fax machines directly to a compatible host card. Each module adds four terminations for plain old telephone service lines. The modular design lets administrators expand port capacity incrementally as requirements grow.

Who It Suits and Who It Does Not

This module suits installers deploying A800P, TDM800P, AEX8000P or TDM2400P cards who need additional analog station ports. It is not for systems that lack a compatible TDM host card or for installations requiring digital PRI or BRI interfaces. Buyers needing more than four ports per module should evaluate higher-density alternatives.

Four Ports Per Module Decides Fit

The single specification that decides fit is the four analog ports delivered by each S400M module. A host card accepts multiple modules up to its maximum slot count, so total port count scales in steps of four. Verify the host card model and available slots before ordering to match the required line capacity.