The GR-468-CORE standard, published by Telcordia Technologies (formerly Bellcore), is the industry's primary specification for the reliability and qualification testing of optical components —particularly optical transceivers, optical devices, laser diodes, and. The GR-468-CORE standard, published by Telcordia Technologies (formerly Bellcore), is the industry's primary specification for the reliability and qualification testing of optical components —particularly optical transceivers, optical devices, laser diodes, and. DVT or Design Verification Testing is the most important qualification test that transceivers undergo regardless of application. The 5- corner test is performed at the five combinations given by max-min values of temperature and input voltage, which are the most important external variables. All. Optical module transceivers are the main end-to-end components in fiber optic systems and optical communications. Levels far above the level of an individual module can be reached, possibly causing unacc ptable levels of EMI from a system filled with many optics. To predict the EMI level of a router-like system, the EMI of individual mo ules needs to. The AFCT-5745NPZ/UPZ Lead-free Singlemode Optical Transceivers have been qualified in accordance to the requirement of Telcordia Document GR-468-CORE under the supervision of Avago Technologies Quality & Reliabil-ity Department.