The Substation is a rugged tamper and weather resistant substation with a large red call-in button that is easily pressed by an elbow or shoulder. Call-in can be programmed as an emergency call to a STENTOFON Master. The station has a unique design to protect the speaker, microphone, LED and internal electronics from moisture and external abuse. This station, which is extremely rugged and provides excellent sensitivity and voice reproduction, is ideal for security applications in parking lots, campus walkways, entry doors, gates, etc., wherever fast call initiation is required. The 62927 will operate on all AlphaCom systems.