Broadband Related > FTTC and FTTP Issues

Low UpSync

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dambuilder:
Not that it really causes me any problem (just curious) but see below. Any idea why the US is so much lower than the max yet the DS is higher than the max? Using a HG612 BTW.

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:   0
Last initialization procedure status:   0
Max:   Upstream rate = 15391 Kbps, Downstream rate = 53356 Kbps
Bearer:   0, Upstream rate = 12000 Kbps, Downstream rate = 56678 Kbps

j0hn:
The upstream looks banded (capped).
Is it always exactly 12000 (or 11999)?

dambuilder:
It's been bang on 1200 for over a month now. Used to fluctuate slightly prior to that. I did try using a Vigor 130 (ECI Cab) for a while but it made my connection worst and I ended up with Interleave. Switching back to the HG612 restored Fastpath after a few days but also introduced the 1200.

dambuilder:
Just in case anyone wants to see the stats;

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:   0
Last initialization procedure status:   0
Max:   Upstream rate = 15166 Kbps, Downstream rate = 53356 Kbps
Bearer:   0, Upstream rate = 12000 Kbps, Downstream rate = 56678 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):    5.4       6.0
Attn(dB):    17.3       0.0
Pwr(dBm):    5.1       5.1
         VDSL2 framing
         Bearer 0
MSGc:      19      258
B:      239      235
M:      1      1
T:      64      1
R:      0      16
S:      0.1348      0.6242
L:      14248      3268
D:      1      1
I:      240      255
N:      240      255
         Counters
         Bearer 0
OHF:      342740167      357147
OHFErr:      4086      798
RS:      0      2959359
RSCorr:      0      4310
RSUnCorr:   0      0

         Bearer 0
HEC:      9672      0
OCD:      328      0
LCD:      328      0
Total Cells:   3397524960      0
Data Cells:   3903303912      0
Drop Cells:   0
Bit Errors:   0      0

ES:      2878      752
SES:      1      0
UAS:      28      28
AS:      741876

         Bearer 0
INP:      0.00      0.00
INPRein:   0.00      0.00
delay:      0      0
PER:      2.16      10.34
OR:      92.39      204.25
AgR:      56770.24   12204.12

Bitswap:   468743/468743      118/122

Total time = 1 days 14 hours 5 min 4 sec
FEC:      0      4310
CRC:      4086      798
ES:      2878      752
SES:      1      0
UAS:      28      28
LOS:      0      0
LOF:      0      0
LOM:      0      0
Latest 15 minutes time = 5 min 4 sec
FEC:      0      2
CRC:      0      0
ES:      0      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Previous 15 minutes time = 15 min 0 sec
FEC:      0      0
CRC:      2      0
ES:      2      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Latest 1 day time = 14 hours 5 min 4 sec
FEC:      0      325
CRC:      240      58
ES:      187      53
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Previous 1 day time = 24 hours 0 sec
FEC:      0      667
CRC:      538      117
ES:      353      107
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Since Link time = 8 days 14 hours 4 min 35 sec
FEC:      0      4310
CRC:      4086      798
ES:      2878      752
SES:      1      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0

WWWombat:
Strange that the modem thinks you have another 3Mbps attainable, while at the same time being spot on the (usual) target SNRM of 6dB.

DLM hasn't asked for any intervention upstream, but the modems have negotiated to put FEC protection on anyway. That's usual in the upstream ... at least when there is capacity to spare.

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