Spec Sheet Preview: Alpha Communications® features a complete line of U.L.® Listed plug-in transformers to power their intercoms, video-intercoms, nurse-call systems, and various signalling systems and devices. The Alpha Communications® Class 2 plug-in transformers were designed for quick and easy installation in applications where pigtail-type transformers are impractical or unsightly. They are particularly suitable for use in home or office installations, or in areas where the transformer must be exposed. All mod …