TRANSPLANT PROGRAM QAPI. Introduction to Transplant QAPI. A Regulatory Overview. QAPI Specialists/Quality Surveyor Educators (QSEs)/ Transplant Surveyors . James Ballard, MBA, CPHQ, CPPS, HACP. Eileen Willey, MSN, BSN, RN, CPHQ, HACP. 3
High-Level Data Link Control (HDLC) is a bit-oriented code-transparent synchronous data link layer protocol developed by the International Organization for Standardization (ISO). The original ISO standards for HDLC are: 1  ISO 3309 â Frame Structure.
High Level Link Control (HDLC) Protocol. The HDLC protocol is a general purpose protocol which operates at the data link layer of the OSI reference model. The protocol uses the services of a physical layer, and provides either a best effort or reliable communications path between the transmitter and receiver (i.e. with acknowledged data transfer).