Eurotech BRI ISDN Manual de usuario descargar pdf (Pagina 58)

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CC Microcontroller ISDN TA Reference Design Manual

B-2

HDLC - High-Level Data-Link Controller. ISO standard for layer-2 data bit-

oriented communications protocol. HDLC is used for LAPB, LAPD, V.120 and

SS7.

IDC - ISDN Data Controller. Performs D channel processing on the S/T reference

point data.

IOM-2 - Industry standard serial bus developed by Siemens.

ISDN - Integrated Services Digital Network.

ISO - International Standardization Organization. Developed the OSI reference

model and HDLC standards.

LAPB - Link Access Procedure Balanced. The X.25 data link layer protocol. X.25

is a special case of HDLC.

LAPD - Link Access Procedures on the D channel. ISDN data link layer protocol

defined by CCITT. LAPD is a special case of HDLC

LE - Local Exchange. Class 5 C.O.

MPI - Microprocessor Interface.

NT1 - Network Termination Type 1. Termination device located on the customer

premises that converts the two wire U-interface to a four wire S/T-interface.

NT2 - Network Termination Type 2. Termination device separating the S and T

reference points used for customer-controlled communication distribution (such

as PBX or LAN)

OSI - Open Systems Interconnection reference model. Seven layer architecture

developed by ISO for open system communications.

PBX - Private Branch Exchange. Customer site switch, incorporating the use of

an NT2 device.

PCM - Pulse Code Modulation.

PIO - Programmable Input/Output.

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Eurotech BRI ISDN Manual de usuario Pagina 58