Yeastar S2 Yeastar 2FXS Ports

hello and welcome to Poseidon tech I'm tell and this is my office so please come inside let me introduce my assistant Kate Kate is responsible for sales department while I am responsible for the technical support one of the key elements of my office is the office telephone system that allows me to be very flexible using my mobile phone so today's episode is about yester s-21 PBX for small business s20 is a standalone PBX system that supports 20 users 10 concurrent calls up to 4 FX s FX o Bri port up to 1 TSM 3G 4G channel and 20 VoIP tranqs it has a modular design with two onboard module slots these are the available modules as to module 4 to analog telephones Oh to module 4 to PSTN lines s on module 4 one analog telephone and one pstn line B to module 4 to bri ports GSM module 4 1 GSM channel 3G module and 4G LTE modem for this tutorial I will use the auto module let's support to analo