Interleaver Depth DLM

For the first time for over the year DLM has changed Interleaver Depth from 16 to 8 on the downstream.

Also changed sync rate from 79999k to 80000k.

Mode VDSL2
Traffic Type PTM
Status Up
Link Power State L0
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 6.6 15.2
Attenuation (dB) 11.7 0.0
Output Power (dBm) 12.4 -0.3
Attainable Rate (Kbps) 83785 28042
Rate (Kbps) 80000 19999
B (# of bytes in Mux Data Frame) 203 237
M (# of Mux Data Frames in an RS codeword) 1 1
T (# of Mux Data Frames in an OH sub-frame) 0 42
R (# of redundancy bytes in the RS codeword) 10 16
S (# of data symbols over which the RS code word spans) 0.0809 0.3781
L (# of bits transmitted in each data symbol) 21153 5374
D (interleaver depth) 8 1
I (interleaver block size in bytes) 214 127
N (RS codeword size) 214 254
Delay (msec) 0 0
INP (DMT symbol) 49.00 0.00

Full stats:

adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 28006 Kbps, Downstream rate = 83770 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 80000 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.6 15.1
Attn(dB): 11.7 0.0
Pwr(dBm): 12.4 -0.3

VDSL2 framing
Bearer 0
MSGc: -6 26
B: 203 237
M: 1 1
T: 0 42
R: 10 16
S: 0.0809 0.3781
L: 21153 5374
D: 8 1
I: 214 127
N: 214 254
Q: 8 0
V: 5 0
RxQueue: 78 0
TxQueue: 26 0
G.INP Framing: 18 0
G.INP lookback: 26 0
RRC bits: 0 24
Bearer 1
MSGc: 186 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 5.3333 0.0000
L: 48 0
D: 3 0
I: 32 0
N: 32 0
Q: 0 0
V: 0 0
RxQueue: 0 0
TxQueue: 0 0
G.INP Framing: 0 0
G.INP lookback: 0 0
RRC bits: 0 0

Counters
Bearer 0
OHF: 0 219979
OHFErr: 0 1
RS: 42978304 645135
RSCorr: 30 0
RSUnCorr: 0 0
Bearer 1
OHF: 54412 0
OHFErr: 0 0
RS: 652202 0
RSCorr: 0 0
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 23562 0
rtx_c: 7 0
rtx_uc: 0 0

G.INP Counters
LEFTRS: 0 0
minEFTR: 79996 0
errFreeBits: 1066280 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 134460697 0
Data Cells: 5004344 0
Drop Cells: 0
Bit Errors: 0 0

Bearer 1
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 0 0
Data Cells: 0 0
Drop Cells: 0
Bit Errors: 0 0

ES: 0 1
SES: 0 0
UAS: 27 27
AS: 875

Bearer 0
INP: 49.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 0.00 3.98
OR: 0.01 64.22
AgR: 80344.32 20063.54

Bearer 1
INP: 4.00 0.00
INPRein: 4.00 0.00
delay: 3 0
PER: 16.06 0.01
OR: 95.62 0.01
AgR: 95.62 0.01

Bitswap: 9/9 0/0

https://www.thinkbroadband.com/speedtest/14972687118...

ping seem very high at 48ms before was 10ms?

NOTE: Latency is not equal to ping. Latency in the speed test is a small TCP packet return trip time.

http://tbb.st/1494003869768664455 one of your older ones showing similar latency

You did have a nice low average latency recently http://tbb.st/1497121537496371155

So advice, click the analysis button and see if one latency sample was unduly high, thus skewing the latency average

Probably a slight relaxation of the G.INP parameters by DLM. A bit less noise somewhere.

Maybe a neighbour away on holiday and their modem turned off.

Look like my sync rate could soon drop below 80Meg for the first time since 2014.

Mode VDSL2
Traffic Type PTM
Status Up
Link Power State L0
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 6.1 15.0
Attenuation (dB) 11.7 0.0
Output Power (dBm) 12.4 -0.4
Attainable Rate (Kbps) 80469 27808
Rate (Kbps) 80000 19999

Why?

Don't like if my sync rate drop below 80Meg for the first time since 2014. I was hoping to stay with 80Meg above for many years to come until G.Fast come along.

Look like my sync rate could soon drop below 80Meg

In plain English, my question "Why?" was referring to "Why does it look like your sync rate could soon drop below 80Mb/s".

Maybe because the attainable rate shown in Max's stats has crept down towards the 80 mark ?