A.OMP B.CMP C.GLI D.GUIM
A.E1 B.T1 C.STM-1 D.FE
A.信令處理板,即SPB2(SignalingProcessingBoard2) B.雙速率變換板,即DRTB2(DualRateTranscoderBoard2) C.Gb接口處理板,即GIPB2(GbInterfaceProcessingBoard2) D.LAPD協(xié)議處理板,即LAPD2