EX08 – Yeastar Expansion Board w/ 8 RJ11 Ports for S100 and S300

EX08 – Yeastar Expansion Board w/ 8 RJ11 Ports for S100 and S300V The Yeastar EX08 is an expansion board for the S100 and S300 PBX products. Product Features  • 8 RJ11 ports • Supports up to 4 optional modules • Can add 2 expansion cards to S100, and 3 to S300