S- Series VoIP PBX

One Platform All Communications

Experience the ultimate convenience of doing business anywhere, on any device with S-Series VoIP PBX to work with Yeastar Linkus UC softphone and Linkus Cloud Service. Gain the advantage over your competition by combining voice, instant messaging, conferencing, presence, and more…all from one single platform.

Unparalleled Ease of Use and Management

With an intuitive browser-based interface and a robust set of management tools, productivity soars as you focus on your business, not your phone system.

All office extension feature

Click/touch to make, receive, transfer or record a call and check voicemails and recordings from anywhere.

Instant messaging & file sharing

Text anyone from your company directory and share file in real-time with ease. Powered by Linkus Cloud Service.

CRM integration

Screen-pop upon calls and more from your Outlook Contacts, Google Contacts, Salesforce CRM and Microsoft Dynamics 365.


See who is available, busy or offline immediately and intuitively with colored status indicator.

One number on all devices

Maintain a single number across devices with Linkus installed on your computer, iPhone or Android phones.

Scalable Modular Design

Flexible combination of telephony interfaces & Easy future expansion.

Telephony Modules

FXS extensions module, FXO module,PSTN fallback module, BRI module,and GSM/3G/4G module.

Expansion Boards

Supports 4 modules in one EX08 Expansion Board Supports 1 E1/T1/PRI port in one EX30 Expansion Board.

System Capacity

Expand SIP users and concurrent calls when your business grows with DSP Module.

Excellent Interoperability

Use Your Existing IP Phones, SIP Trunk…all at your choice

Powerful Remote Management

Benefit from a highly secure platform to monitor and manage your PBX system(s) remotely and centrally. Whether you are a phone system end user or a IT reseller, Yeastar Remote Management tool is here to free you from technical headaches and reduce IT & maintenance costs.