Yeastar D30 Module

The Yeastar D30 module is an internal expansion/DSP module for certain Yeastar IP PBX systems that boosts system capacity — especially the number of extensions (users/phones) and the number of simultaneous calls your PBX can handle. Yeastar D30 DSP Expansion Module — a Digital Signal Processor (DSP) add‐on for Yeastar PBX systems. It plugs into the PBX’s expansion slot — you don’t need a separate power adapter; it’s powered by the PBX itself.