Yeastar D30 is a DSP module that used to expand the capacity of S-Series PBX.
In other words, it increases the capacity of S Series S100 and S300 IP PBX System. Yeastar D30 DSP card allows adding 100 more users and 30 more concurrent calls.
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Scalable and Modular S-Series VoIP PBX
Yeastar S-Series VoIP PBX provides flexible telephony interfaces combination while allowing for future scalability with the unique modular design. Besides the built-in rich SIP capabilities, S-Series lets you decide what types of extensions and physical trunks you need in your telephone system. When your business grows, adding more users and concurrent calls is also possible with S-Series.
With Yeastar S-Series, all the telephony interfaces are modular and customizable, whether it’s FXS, FXO, ISDN BRI, GSM/3G, or E1/T1/PRI. S20 has 2 onboard module slots, S50 and S412 support 4. S100 and S300 require the combination of Expansion Board and Telephony Module to add telephony interfaces. S100 allows 2 Expansion Boards and S300 supports 3.