Scalable and Modular S-Series VoIP PBX

Yeastar S-Series VoIP PBX provides flexible telephony interfaces combination while allowing for future scalability with 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.
Add Telephony Interfaces
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
S2 Module
2 FXS Ports
Add 2 analog telephones.
S2 Module
2 FXO Ports
Connect 2 analog PSTN (POTS) lines.
SO Module
1 FXS Port & 1 FXO Port
Unique PSTN Fallback Function
B2 Module
2 BRI Ports
2 x NT/TE BRI Ports
GSM Module
1 GSM Channel
1 Channel for GSM Voice Calls Frequency: 850/900/1800/1900 MHz (quad-band)
3G Module
1 WCDMA Channel
1 Channel for WCDMA Voice Calls Frequency: 900/2100 MHz, 850/2100 MHz, 850/1900 MHz
4G LTE Module
3G/4G Voice Call & Data
Insert 4G module on Slot_1 of S20&S50 and Slot_1 of EXP 1 of S100&S300