For Yeastar S-Series, all the telephony interfaces are scalable and customizable, with the use of Yeastar Modules and Boards, 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.

Modules and Boards

Yeastar
Yeastar 4G LTE Module

Yeastar 4G LTE Module (YST-4G) Yeastar 4G LTE Module enables 4G cellular data on SIM card, making the 4G LTE become the primary Internet connection...

Yeastar 4G LTE Module (YST-4G) Yeastar 4G LTE Module enables 4G cellular data on SIM card, making...

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Yeastar
Yeastar B2 2-BRI Extension Module

Yeastar B2 2-BRI Extension Module (YST-B2) The Yeastar B2 Module is used to customize the connectivity of a compatible Yeastar MyPBX or S-Series phone system....

Yeastar B2 2-BRI Extension Module (YST-B2) The Yeastar B2 Module is used to customize the connect...

In Stock
$175.00
Yeastar
Yeastar D30 DSP Module

Yeastar D30 DSP Module (YST-D30) The Yeastar D30 Module is used to customize the connectivity of a compatible Yeastar S-Series phone system. The D30 is a DSP module, used...

Yeastar D30 DSP Module (YST-D30) The Yeastar D30 Module is used to customize the connectivity of ...

In Stock
$300.00
Yeastar
Yeastar EX30 E1/T1/PRI Expansion Board

Yeastar EX30 E1/T1/PRI Expansion Board (YST-EX30) The Yeastar EX30 Expansion Board is used to customize the connectivity of a compatible S-Series phone system. This expansion span adds 1 E1/T1...

Yeastar EX30 E1/T1/PRI Expansion Board (YST-EX30) The Yeastar EX30 Expansion Board is used to cus...

In Stock
$580.00
Yeastar
Yeastar EX08 Module Expansion Board

Yeastar EX08 Module Expansion Board (YST-EX08) The Yeastar EX08 Expansion Board is used to customize the connectivity of a compatible S-Series phone system. This expansion span increases the...

Yeastar EX08 Module Expansion Board (YST-EX08) The Yeastar EX08 Expansion Board is used to custom...

In Stock
$80.00
Yeastar
Yeastar 3G WCDMA Channel Module

Yeastar 3G WCDMA Channel Module (YST-3G) The Yeastar 3G WCDMA Channel Module is used to customize the connectivity of a compatible Yeastar MyPBX or S-Series phone...

Yeastar 3G WCDMA Channel Module (YST-3G) The Yeastar 3G WCDMA Channel Module is used to customize...

In Stock
$290.00
Yeastar
Yeastar GSM Channel Module

Yeastar GSM Channel Module (YST-GSM) The Yeastar GSM Channel Module is used to customize the connectivity of a compatible Yeastar MyPBX or S-Series phone system. Specifically,...

Yeastar GSM Channel Module (YST-GSM) The Yeastar GSM Channel Module is used to customize the conn...

In Stock
$250.00
Yeastar
Yeastar SO PSTN Fallback Module

Yeastar SO PSTN Fallback Module (YST-SO) The Yeastar SO Module is used to customize the connectivity of a compatible Yeastar MyPBX or S-Series phone system. Specifically,...

Yeastar SO PSTN Fallback Module (YST-SO) The Yeastar SO Module is used to customize the connectiv...

In Stock
$120.00
Yeastar
Yeastar O2 2-FXO Extension Module

Yeastar O2 2-FXO Extension Module (YST-O2) The Yeastar O2 Module is used to customize the connectivity of a compatible Yeastar MyPBX or S-Series phone system....

Yeastar O2 2-FXO Extension Module (YST-O2) The Yeastar O2 Module is used to customize the connect...

In Stock
$110.00
Yeastar
Yeastar S2 2-FXS Extension Module

Yeastar S2 2-FXS Extension Module (YST-S2) The Yeastar S2 Module is used to customize the connectivity of a compatible Yeastar MyPBX or S-Series phone system....

Yeastar S2 2-FXS Extension Module (YST-S2) The Yeastar S2 Module is used to customize the connect...

In Stock
$110.00