Yeastar YST-D30 DSP Expansion Module for S100, S300

- D30 is a DSP module, used to expand the capacity of PBX. With a D30 module added, the number of extensions increases by 100 and concurrent calls increases by 30 additionally.
- DSP Expanson Module for Yeastar S100, S300,P560 and P570 Systems
- Install on the motherboard to expand capacity by 100 extensions and 30 concurrent calls
- Use up to 1 module on the S100 and up to 2 modules on the S300