This IP-PBX is an excellent start-up telephone communications stand-alone solution for small business. This model is a low cost, entry level telephony with both analog and VoIP / SIP calling features.

The YeaStar S-Series systems are based on modular design, which allows you to create your own phone system package, based on Your needs, with FXO (Analog Extension ports), or FXS (Analog Telephone Line Ports). Each port set can be enabled by purchasing separate cards based on your specific needs!

Also available on special order are: BRI ports, and GSM/CDMA/3G/4G channel ports for mobile connection options.


Yeastar S20 Great for most small offices, home offices (SOHO), small-to-medium enterprise (SME), retail outlet stores and anywhere you need 1 to 20 user extensions for day to day calling operations.

yeastar S20 modules

VoIP Trunk Channels come standard with 20 trunks available right out of the box.

The great thing about the modular design is: it’s flexible, and can grow with your business needs depending on different situations. You’re not locked into specific hardware capacity constraints!

If you need to add two analog telephone lines, simply add the optional O2 Module (FXO port card), or two modules to add four analog port activation. Or, mix 2-FXO ports with an O2 Module, and 2-FXS ports (analog extensions) with a S2 Module to create a split port use system.

Of course, if you’re only going to use VoIP / SIP Trunking telephone service on the YeaStar S20 – you don’t need to spend the extra on adding modules you won’t need.

linkus yeastar mobile device pc appYEASTAR S20 UNIFIED COMMUNICATIONS

Communicate whether on the road, in a hotel, or out for lunch – ease of use and flexible!

Not only do you have access around the office, or at remote locations like home or satellite branches using cordless and desk top IP phones – the YeaStar Linkus Mobile and PC App allows you to connect anywhere, view colleagues’ presence status and synchronize data!

Use one extension for yourself or other workers – and communicate across several devices.

The Linkus App also synchronizes call history and corporate directory information – AUTOMATICALLY.

LinkUS Mobile Device App includes: HD VoIP Calls, Presence information, Company directory listing, Instant Messaging, Conferencing, SRTP Secure Media, Advanced call handling.

Check your voicemails and call in/out of the office main PBX System lines. Available for iOS and Android mobile devices.

LinkUS PC includes the mobile features and a few additional ones, such as: File sharing, CRM integration.



YeaStar is one of the only manufacturer who fully integrates Automatic Provisioning of third party IP Phones. That’s right – they integrate with other popular brand manufacturers’ SIP endpoints – right out of the box. Third party device provisioning is available for these IP Phone brands available here at YeaLink, GrandStream, Snom, Panasonic, Mitel, Cisco, Alcatel, Fanvil, and more.

Auto-provisioning is also available for YeaStar Gateways – allowing you to expand your Analog to SIP telephone line capacity with different YeaStar IP-PBX phone system

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