Yealink, the global leading unified communication (UC) terminal solution provider, announced today the release of the company’s T4S series of IP phones, the upgraded IP phone line of the T4 series. Yealink's new T4S series IP phones are now available for distribution purchase globally. Yealink's T4S series is the upgraded IP phone line of Yealink's former T4 series. Designed for today’s busy executives and managers, the T4S series features an elegant appearance, Optima high-definition audio quality and a remarkable phone experience. While maintaining the same price point and market positioning as the T4 series, the new series hosts a range of...