The Secure Headset Group (SHG) wireless headset adapter delivers reliable wireless communication and seamless PTT (push-to-talk) functionality for public safety dispatch, air traffic control, radio operations, and simulation training. L-com stocks a wide range of fiber optic couplers and adapters. Fiber optic's advantages over copper cabling are well known immunity to EMI and RFI, low attenuation over long distances, high bandwidth capacity, smaller size and lower weight. These are also known as FC fiber optic mating sleeves and are available in both single mode and multimode variants with either a zirconia sleeve or bronze sleeve They are also available in simplex with round and square types for flange. Note: Some products are available only in certain regions. Contact us regarding local availability. SmartCommand Call Boxes (3300 Series) Each two-way communication system for rescue assistance is required to have hands-free devices (call boxes) located on each floor above/below the main exit. Sencomm delivers the ultimate guide to choosing the best dispatcher headsets and push-to-talk adapters! For over 25 years, Sencommunications, Inc. As. Advances within information, device, and networking technologies are enabling emergency response agencies to connect with their people, equipment, and systems in real-time. As we advance, the focus on developing.