The SONET/SDH Concatenated/Non-concatenated STS-192/STM-64 core implements the STS-192 and STM-64 layer function of Telcordia GR-253-CORE/ITU-T G.707, .
The SONET/SDH OC12/4xOC3 & STM-4/4xSTM-1 Framer core implements the STS-12/4xSTS-3 and STM-4/4xSTM-1 layer function of Telcordia GR-253-CORE/ITU-T G.707, .
The SONET/SDH Concatenated/Non-concatenated STS-48/STM-16 core implements the STS-48 and STM-16 layer function of Telcordia GR-253-CORE/ITU-T G.707, supporting .