F680 ZX279128

Stock firmware against OpenWrt on the SAME unit of this model. Every pair charted below was measured with the same instrument, at the same operating point -- that is the condition for appearing on a chart at all. A pair whose two halves were taken with different instruments, or at operating points that cannot be held together, is not charted: each figure keeps its qualifiers in the dated artifact these pages are generated from, and the certificate publishes the two of them as separate, individually attributed rows rather than as a difference. Only paired figures appear in these performance charts. Missing or incomparable halves are named without publishing standalone values; the dated artifacts and certificate retain their measurements. The external received-signal and WiFi stability tables list each available measurement independently and mark missing readings.

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Two frame sizes are published here, 60 B and 1400 B, and both as bandwidth on the cable: megabits per second counted the way the wire carries them, each frame plus its checksum, preamble and inter-frame gap (L1). Measured the same way at both sizes, every wired bar reads against the same gigabit link, so a 60 B bar and a 1400 B bar can be compared directly. Whether a given bar is AT the link's capacity or far below it is what the bar itself says, and the caption claims nothing about which is which. WiFi figures have no cable framing and are counted at the frame itself (L2). Every size the suite measures, and every qualifier each figure was measured with, stays in the dated artifact these pages are generated from.

Bandwidth, 60 B frames

No comparable stock/OpenWrt pair is available for: Bandwidth, 60 B frames. Standalone values remain in the dated artifacts.

Bandwidth, 1400 B frames

No comparable stock/OpenWrt pair is available for: Bandwidth, 1400 B frames. Standalone values remain in the dated artifacts.

WiFi stability

Lower is better for loss and delay; higher is better for the download and upload rates.

Round trips from the first WiFi client to the WAN-side lab target. Idle download and upload are that client's own maximum TCP rate on the same band and cipher. Under load, a second client on the same AP downloads or uploads, or the first client itself downloads; the rate that load achieved is shown beside the round trips measured under it. Loss is packet loss; p95 is delay in milliseconds. A dash means that metric is unavailable; n/a marks the direction a load row does not run.

Stock and OpenWrt are listed for each scenario. Regression: FAIL when mean RTT is more than 30 percent worse than stock. For loss, the allowed increase is the largest of 30 percent of stock loss, one packet, or 2 percentage points. The same unit and radio settings are required. Lab clients are less than 1 m from the ONUs; these measurements do not validate range.

Idle

Another client downloading or uploading

The client itself downloading

Missing data, and why

Every benchmark point and published quantity of this device that has no usable figure: its state, the date of the last attempt and an excerpt of why that attempt produced nothing. A missing figure is never drawn as a zero.