GDX5 Audio and Video Call Control Units (CCU) house all the relevant control equipment to handle audio and video calls from an Entrance Panel to the designated handset. Designed to be flexible, each CCU can support 8 or 16 handsets for audio and/or video calls to assist with audio or visual identification of callers and visitors. The 2 Audio version is ideal where a concierge service is not required and can support up to 32 audio or 16 video handsets. The 7 Audio version supports a concierge service and is recommended for extended installations which can support up to 224 audio and 112 video handsets. Features CCU designed for 8- and 16-way handset support Audio only or Audio & Video handsets options (Max. 4 concurrent video calls supported at any one time) Available in 2 or 7 Audio channel systems Concierge option available with 7 Audio channel system Single high-security and key locked sheet steel enclosure Supports 7Ah battery backup (battery not supplied)