Protected from Internet hackers and viruses with the built-in firewall, TLS, SRTP, and more. Powered by Freescale ARM A9 industrial grade quad-core CPU processors. Free lifetime firmware upgrade assures reliability over the years. Save time with streamlined installation. Manage PBX on the intuitive web GUI. Automatically provision phones from Yealink, Snom, and more to save deployment time. With Yeastar S-Series, all the telephony interfaces are modular and customizable, S20 support 2 onboard module slots to custom FXS, FXO, ISDN BRI, GSM/3G/4G.

  • 20 Users
  • 10 Concurrent Calls
  • Up to 4 FXS/FXO/BRI Ports
  • Up to 1 GSM/3G/4G Channel

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