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 supports 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.
Telephony Modules Available
Supported Model: S20, S50, S100, S300
Click to check the supported WCDMA operators.
Expansion Board
EX08 has 4 onboard module slots and 8 interfaces on the panel.
Supported Model: S100 and S300
EX30 has 1 onboard E1/T1/PRI port.
Supported Model: S100 and S300
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