The Konexx Konference allows you to connect analog conference call units or direct-connect speakerphones to virtually any digital phone system. By interfacing with thetelephone handset this product lets you avoid the cost of installing dedicated analog lines. Works with virtually any conference unit or direct connect speakerphone. Four-position switch makes Konference compatible with virtually any digital phone system. Eliminate costly dedicated analog line installations and communication adapters. Powered by supplied AC adapter.