
Industry Best Pricing
Quantity discounts available
Have a question?
Quantity discounts available
Pre-sales product and solution advice
Add-on tech support plans available
Same day shipping on most orders
Yeastar YST-O2 is a module for inserting into a compatible Yeastar IP-PBX, giving two of the PBX's RJ11 ports FXO connectivity. FXO ports are used for connecting a VoIP phone system to POTS (analog) telephone lines, for instance.