High-level Data Link Control


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High-level Data Link Control

(networking)
(HDLC) A general-purpose data link control protocol defined by ISO for use on both point-to-point and multipoint (multidrop) data links. It supports full-duplex, transparent-mode operation. It is used extensively in both multipoint and computer networks.

Some manufacturers and other standards bodies still use their own acronyms, e.g. IBM's SDLC (Synchronous Data Link Control), the forerunner of HDLC and ANSI's ADCCP (Advanced Data Communications Control Procedure).

[Fred Halsall, "Data Communications, Computer Networks and Open Systems" 4th edition, 1996, p.237, Addison-Wesley Publishing Co. Reading, Mass., USA].
References in periodicals archive ?
The PM7310 FREEDM 336L, PM7311 FREEDM 84L and PM7312 FREEDM 32L devices are the industry's first high-level data link control, Point-to Point Protocol (PPP), Frame Relay (FR), and Multilink-enabled packet processors to support a separate high priority path to interleave latency sensitive traffic, such as Voice-over-IP (VoIP), with fragments of large data packets.
Both new cards feature Laurel's industry-leading QoS (quality of service) capabilities and the flexibility to configure AnyService on each channel including Point-to-Point Protocol (PPP), High-level Data Link Control (HDLC), Frame Relay, Asynchronous Transfer Mode (ATM), Multilink PPP (RFC 1990), Multilink Frame Relay (FRF.
MISSION will be a complete multi-service inter-networking solution, combining state-of-the-art framer, High-level Data Link Control (HDLC)/ATM protocol controller, network processing silicon, and a comprehensive suite of modular software.
The 1-port OC-192c/STM-64 SONET/SDH PHY card scales to 8 ports per ST200 (16 per telco rack) and supports Packet over SONET (POS), Point-to-Point Protocol (PPP), High-level Data Link Control (HDLC) and Frame Relay encapsulations.
ST200 SONET/SDH interfaces support channelization from NxDS-0 to OC-48, along with a variety of encapsulations including Packet over SONET (POS), Point-to-Point Protocol (PPP), High-level Data Link Control (HDLC), Frame Relay, Asynchronous Transfer Mode (ATM), X.
It is designed to operate at 30 MHz with controller area network (CAN) functionality and high-level data link control.
Designated TDAT042G5LT and TDAT04622LT, the Agere devices map data and time-division multiplexed (TDM) traffic onto SONET/SDH frames and serve as protocol framing engines for EoS and Level 2 protocols such as high-level data link control (HDLC), asynchronous transfer mode (ATM) and point-to-point protocol (PPP).

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