Yeastar D30 Expansion DSP Module$ 92.58 Yeastar D30 Expansion DSP Module D30 DSP module for S100 & S300 increases extra 100 extensions & 30 concurrent calls capacity Yeastar D30 module is used to expand the capacity of S-Series PBX. For each D30 module added, the max amount of users increase by 100 while concurrent calls increase by 30. Specification Category PBX and Phones Brand Yeastar Related products Yeastar S20 IP PBX SystemSelect options Panatron PXT 308 PABX 3 Lines 8 extension PXT 308Select options Panatron PXT848 8 Lines Exapandle to 48 ExtensionsAdd to cart Yeastar S-Series S20 IP PBX SystemSelect options This product has multiple variants. The options may be chosen on the product page Yeastar S100 VoIP PBX Phone SystemAdd to cart