HDLCWert

HDLCWert is a term encountered in some technical discussions to denote a numeric metric associated with the High-Level Data Link Control (HDLC) protocol. It is not part of the official HDLC standard and has no universally accepted definition. In practice, HDLCWert may refer to a link-quality score or a frame integrity indicator derived from observations on an HDLC link, such as the rate of correctly validated frames, the number of FCS checks passed, and related error counts.

Calculation and interpretation of HDLCWert vary by implementation. A typical approach might combine the proportion of frames with valid FCS, the observed error rate, and retransmission events into a single scalar value, often normalized to a 0–100 or 0–1 scale. A higher value generally signals better link quality or reliability. The metric is primarily used for monitoring, diagnostics, and comparison of HDLC links, rather than for protocol negotiation or standard-based control.

Limitations and considerations include the lack of standardization, which means cross-device or cross-software comparisons can be unreliable. The HDLCWert can be influenced by measurement windows, traffic patterns, and the specific FCS configuration. It is best used in conjunction with other indicators such as framing errors, bit error rate, and overall throughput to assess HDLC link performance.

See also: High-Level Data Link Control, Frame Check Sequence, Link quality indicator.