1. Whether you're in the classroom or boardroom, a voice amplification system from Cetacea Sound makes presenting and teaching easier than ever

2. A modular bidirectional optical amplification system includes a multiwavelength dual amplifier building block, a multiwavelength unidirectional booster amplifier BB, a unidirectional and a bidirectional Optical Service Channel (OSC) BB, an Intelligent Optical Terminal Accessway (IOTA) module, and an interleaved filter BB.