TY - GEN AU - S Wakid AU - Kathleen Roberts C2 - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD DA - 1991-09-01 LA - en PB - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD PY - 1991 TI - ISDN Conformance Testing, Layer 1--Physical Layer, Part 1--Basic Rate S/T Interface, User Side ER -