Yeastar S20 PBX System


Yeastar S20 IP PBX

Yeastar S20 is a stand-alone telephone system offering an unrivaled range of features too small business with less than 20 users. It supports ten concurrent calls and various combinations of telephony ports including FX S, PSTN, ISDN BRI, and GSM /CDMA /3G. Powered by the latest processor technology, Yeastar’s S-Series PBX is a trustworthy telephone system with one of the highest MTBF (Mean Time Between Failures) in the industry. Based on Asterisk 13, S-Series is born to be powerful and constantly meeting your needs.


Yeastar S20 IP PBX in Detail

One of the newest models of the Yeastar S-Series IP PBX phones, the S20, boasts a low-price point and yet allows for up to 10 concurrent calls. The entire system is designed to support up to 20 users, for up to 4 analog phones, and as many as 20 SIP Trunks. These mouth-watering features make it a no-brainer for teams of modest sizes who aren’t looking to break the bank for a platform that is full-featured.

Part of Yeastar’s latest S-Series VoIP PBX line, it is easy to install, simple to manage and built to perform. You can save time with fast installation and maintenance because Yeastar’s S-series PBX can be streamlined using their advanced auto-configuration, auto-detect, and plug-and-play capabilities. They are also easily controlled and configured via intuitive and graphical UI and point-and-click online configuration panel. Everything can be managed via any internet-enabled device.

Yeastar S-Series VoIP PBX provides flexible telephony interfaces combination while allowing for future scalability with the 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. 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 two onboard module slots.

Yeastar S20 IPPBX DUBAI - Yeastar S20 PBX System


Beyond the intuitive GUI, Yeastar has made some strides in the hardware packed into the S Series. With the focus on their core values, Yeastar ensured the hardware of the new series would be top notch to remain reliable not only for today but hopefully for years to come. Starting with the brain – the processor of the unit – Yeastar has moved to the industrial grade chipset produced by NXP, previously Freescale before the 2015 acquisition. With other components from incredibly large, familiar names like RAM sourced from Samsung and Flash memory from Toshiba, Yeastar made sure the hardware would last.

Yeastar telephone system S20 comes as a very powerful package indeed. Other less popular models of the IP PBX S-Series include S50, S100 and S300. With the decision to include industrial-grade, as opposed to automotive, or standard consumer chipsets, in the new line of units, Yeastar has gone extra lengths to adopt a robust solution. The standard for the S series is set at the industrial level, with the hardware to match. Thanks to this, the S series PBX’s can be installed in almost any location form factory floors, to warehouses and even oil rigs or shipyards. Or, if your S series unit lives its life in a quiet office, it will have no trouble chugging along for years to come. Yeastar even so far as to obtain power adapters from Mean Well, with an average lifespan of over 500,000 hours. If your S series unit lives its life in a quiet office, it will have no trouble chugging along for years to come. Thanks to a three-year warranty, if anything does go wrong Yeastar will be sure to cover it.

Yeastar S20 Specification

  • 20 users and ten concurrent calls
  • 2 Card Slots and maximum 4 Analog, 4 BRI, and 1 GSM
  • Built-in call recording capability
  • Includes 20 SIP Trunks
  • intercom/ Paging
  • Include auto-provisioning and LDAP
  • Licence Free Structure
  • Fax to email
  • Mobility extension
  • IVR
  • SIP forking
  • Voicemail to email
  • Find Me/Follow Me
  • Call Monitor
  • Call Detail Records (CDR)
  • Video Calls
  • User Privileges

Full of Features

Part of what makes the S20 so great for smaller teams is how feature packed the solution is. The ability to host ten concurrent calls, with 20 SIP trunks and support for 20 users, alone makes the S20 a capable setup. The addition of four analog ports on the back for legacy phones can even remove the burden of purchasing dedicated IP phones for those teams just getting off the ground. Because the S20 is built on the Asterisk 13 platform, a massive list of powerful calling and features are available for users. The included GUI makes it that much easier to take full control. Automatic call recording is even free for all S series units.


The S20 represents Yeastar’s core principals of affordability, while remaining reliable, easy to manage, and almost maintenance free. Designed for the small business, setup for the S Series is relatively simple and can be taken care of within  few hours. Essentially, the S20 is a hosted distribution of Asterisk 13 (the Linux based engine that powers the PBX) tied together with an easy to use GUI to configure the vast number of calling features that Asterisk can provide. It all happens to be physically present at your location, on your LAN, instead of “hosted” by a VoIP provider – this combination allows for cost savings, while still offering the same feature-rich service.

To ensure calls can be made, the S20 and all on-premise IP PBX’s will still require a dial tone supplied by a SIP Trunking Provider. Once you obtain the S20 and are ready to begin the installation, your first step would be to obtain a SIP Trunk. In the case of our test, Nextiva was able to provide us with a SIP line, which worked flawlessly. With the help of the Nextiva support, we were able to have the S20 registered to a SIP line within minutes. Physical setup of the device was quick and easy. With all your ports located on the back, plug the S20 into a power outlet, and then plug in an Ethernet cable from your router to establish the network connection. We then spoke to Nextiva, who was able to provide us with the SIP Trunk to establish a dial tone and managed to handle the PBX registration to a SIP Trunk on their end. From the settings menu, we then located the “Trunks” page under the PBX settings and plugged in the necessary account and domain information provided to us by Nextiva. Our S20 IP PBX was now registered to a SIP trunk.

Bottom Line

With their new line of affordable on-premise IP PBX’s, Yeastar set out to develop a solution that is as easy to use as it is robust – while keeping the cost down. It seems like they’ve managed to hit all the important aspects of their development. The S20 represents the entry-level model to this new series, offering up to 20 lines and ten concurrent calls and opens doors for those teams looking to establish a new name, or an existing team adding their phone system to a new location.

The easy to understand GUI makes it easy for even the least tech-savvy business owner to setup and keep track of their phone system while providing a full list of features to rival more expensive subscription-based services. With a strong focus on channel partners, Yeastar can now empower those providers, or even business owners, to provide the cost-effective solution that fits their needs, whether that’s in a simple office, or miles off the coast on an oil rig.

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