At the center of this portfolio is the Cisco ONS 15454 Multiservice Provisioning Platform (MSPP), which provides the functions of multiple network elements in a single platform, combining: 1  Advanced SONET/SDH transport through OC-192 and STM-64.  Low-order and high-order grooming.
Flash Diffuser - Lambency. A lambency flash diffuser is a device that fits onto the front of a flash and both reflects and diffuses the light output, reducing greatly shadows. The flash unit is pointed vertically, and the device fitted, light hits the curved top cap of the unit and this reflects it back through the side.
- passive diffusers and Oil and Tart warmers either Tealight or electric are completely silent. Any diffuser that uses a fan or atomizer will produce noise to varying degrees. If you are trying to sleep  fans can be a nice source of white noise for others it can be annoying. For use while sleeping  if fan noise bothers you, then use a passive diffuser or place the fan diffuser on a towel or other sound absorbing cloth. Do not use a heat source diffuser while sleeping.