Basic Service / DS1/E1/J2 Service / UNSTRUCTURED DS3/E3 SERVICE / DS1 Unstructured Service / Nx64 Service / STRUCTURED DS1/E1/J2 NX64 KBIT/S SERVICE / E3 Unstructured Service / E1 Unstructured Service / DS1/E1/J2 UNSTRUCTURED SERVICE / Circuit Emulation Service / J2 UNSTRUCTURED SERVICE / J2 Nx64 Basic Service / Unstructured DS1 Service / DS3 Unstructured Service / / /