| Description | Type | Length | Notes |
|---|
| Downstream Channel ID | 1 | 1 | Identifier of the downstream channel. Unique per MAC domain. |
| Downstream Frequency (Hz) | 2 | 4 | Central frequency of SC-QAM channel. PLC frequency of OFDM channel. |
| Modulation | 3 | 1 | 0: 64-QAM
1: 256-QAM |
| Annex | 4 | 1 | 0: annex A
1: annex B |
| Profile ID | 5 | 1 | 0: profile A
1: profile B
... |
| Codeword Info | 6 | Total length of sub-TLV bytes | |
| Profile Parity | 6.1 | 1 | 0: even
1: odd |
| Number of Info Bytes | 6.2 | 2 | |
| BCH Decoding Successful | 6.3 | 1 | 0: false
1: true |
| BCH Number of Corrected Bits | 6.4 | 1 | |
| LDPC Number of Code Bits | 6.5 | 2 | |
| LDPC Decoding Successful | 6.6 | 1 | 0: false
1: true |
| LDPC Number of Corrected Bits | 6.7 | 1 | |
| LDPC Number of Iterations | 6.8 | 1 | |
| Reed-Solomon Decoding Successful | 6.9 | 1 | 0: false
1: true |
| Reed-Solomon Number of Corrected Symbols | 6.10 | 1 | |
| Truncated due to Uncorrectables | 7 | 1 | 0: false
1: true |
| Symbol ID | 8 | 4 | Identifier of the first symbol of the packet, assigned by hardware. Used for timing calculations. |
| MER (0.25 dB units, unsigned) | 9 | 1 | Modulation error ratio. |
| Upstream Channel ID | 10 | 1 | Identifier of the logical upstream channel. Unique per MAC domain. |
| SID | 11 | 2 | Service Identifier corresponding to the upstream data burst. |
| IUC | 12 | 1 | Interval Usage Code corresponding to the upstream data burst. |
| Burst ID | 13 | 8 | Unique burst identifier. Used in upstream data bursts*. |
| Burst Info | 14 | Total length of sub-TLV bytes | |
| Burst ID Reference | 14.1 | 8 | Used to associate an upstream MAC frame with its corresponding upstream data bursts*. |
| Minislot Info | 15 | Total length of sub-TLV bytes | |
| Start Minislot ID | 15.1 | 4 | Start minislot identifier. |
Start Minislot ID
(relative in OFDMA frame) | 15.2 | 1 | See section 7.4.1 "Signal Processing Requirements" of the DOCSIS 3.1 Physical Layer Specification (2). Minislot with the lowest subcarriers is 0. |
Stop Minislot ID
(relative in OFDMA frame) | 15.3 | 1 | See section 7.4.1 "Signal Processing Requirements" of the DOCSIS 3.1 Physical Layer Specification (2). Minislot with the lowest subcarriers is 0. |
| UCD CCC Parity | 16 | 1 | 0: even
1: odd |
| Grant Size (bits) | 17 | 3 | |
| Segment Header Present | 18 | 1 | Whether an upstream data burst belongs to a "segment header on" service flow.
0: false
1: true |
| Number of OFDMA Frames | 19 | 2 | |
Estimated Timing Adjust
(1/204.8 μs units) | 20 | 4 | Timing adjustment of an initial or fine-ranging signal, as estimated by the XRA. |
Estimated Power Level
(0.10 dBmV units, signed) | 21 | 2 | |
| Subslot ID | 22 | 4 | See DOCSIS 3.1 Physical Layer Specification (2). |
| Control Word | 23 | 1 | Control word that specifies interleaving parameters of a downstream SC-QAM annex B channel. See Table B.2 of (3). |
| Configuration Info | 254 | Variable | Human readable text string. |
| Extension Type | 255 | Variable | |
