Panasonic KX-NS300 Smart Hybrid PBX system is a cost effective legacy and IP communication system for small and medium size companies that can be flexibly configured and expanded according to your needs. The system starts with 6 analogue trunks 64 extensions (2 digital + 64 analogue) and expandable up to 162 extensions. KX-NS300 is also a unified communication system which has advanced IP features such as mobile linking, integrated voice mail and email, instant messaging.