DESC: Black Box Corporation is a leading worldwide provider of network services and related products to businesses of all sizes in 132 countries. They offer an incredible amount of solutions and best technical services in the industry. With a quarter of a century of experience and highly skilled technical experts, Black Box is your leading network infrastructure provider - from networking products to structured cabling installations.??Most large organizations use a digital PBX system for their phones - not a problem unless you want to connect an analog modem or a speakerphone. Black Box offers the Linc Up solution to that problem. Linc Ups are easy to install - just plug one into the handset jack of your PBX phone.