This topic

FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

ThinkPadUser — Sat, 24 Oct 2020 18:56:25 GMT

I've noticed an issue with my connect recently and that it keeps dropping every few hours and it was enough to get the DLM to reduce my connection down to 4mbps.

Modem: BT Openreach Huawei HG612

Line information:

Stats recorded 24 Oct 2020 19:43:02

DSLAM type / SW version: IFTN:0xb206 (178.6) / v0xb206
Modem/router firmware: AnnexA version - A2pv6C038m.d24j
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 1 hour 3 min 8 sec
Resyncs: 1 (since 24 Oct 2020 12:05:28)

Downstream Upstream
Line attenuation (dB): 26.0 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 4483 3607
SNR margin (dB): 25.0 9.5
Power (dBm): 4.3 4.3
Interleave depth: 1 1
INP: 48.00 0
G.INP: Enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)

RSCorr/RS (%): 0.1020 3.3427
RSUnCorr/RS (%): 0.0000 0.0000
ES/hour: 4.78 9.11

Connection stats:

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 4
Last initialization procedure status: 0
Max: Upstream rate = 4320 Kbps, Downstream rate = 12500 Kbps
Bearer: 0, Upstream rate = 3607 Kbps, Downstream rate = 4483 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): 22.8 8.1
Attn(dB): 26.0 0.0
Pwr(dBm): 4.3 4.3
VDSL2 framing
Bearer 0
MSGc: -6 33
B: 196 112
M: 1 1
T: 0 5
R: 16 16
S: 1.3865 0.9933
L: 1229 1039
😧 1 1
I: 213 129
N: 213 129
Q: 1 0
V: 0 0
RxQueue: 48 0
TxQueue: 12 0
G.INP Framing: 18 0
G.INP lookback: 12 0
RRC bits: 0 24
Bearer 1
MSGc: 90 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 10.6667 0.0000
L: 24 0
😧 1 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 236553
OHFErr: 431 700
RS: 10969107 2486922
RSCorr: 11099 79096
RSUnCorr: 0 0
Bearer 1
OHF: 237696 0
OHFErr: 4 0
RS: 1425806 0
RSCorr: 106 0
RSUnCorr: 10 0

Retransmit Counters
rtx_tx: 2293613 0
rtx_c: 66293 0
rtx_uc: 457972 0

G.INP Counters
LEFTRS: 73 0
minEFTR: 4481 0
errFreeBits: 238028366 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 32830810 0
Data Cells: 5512705 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: 96 206
SES: 74 32
UAS: 154 94
AS: 3818

Bearer 0
INP: 48.00 0.00
INPRein: 1.00 0.00
delay: 0 0
PER: 0.00 16.20
OR: 0.01 19.25
AgR: 4529.03 3626.36

Bearer 1
INP: 2.50 0.00
INPRein: 2.50 0.00
delay: 0 0
PER: 16.06 0.01
OR: 47.81 0.01
AgR: 47.81 0.01

Bitswap: 1221/1226 891/913

Total time = 1 days 3 hours 34 min 56 sec
FEC: 224022 79685
CRC: 4401 759
ES: 96 206
SES: 74 32
UAS: 154 94
LOS: 1 0
LOF: 10 0
LOM: 40 0
Latest 15 minutes time = 4 min 56 sec
FEC: 1705 1018
CRC: 88 28
ES: 3 10
SES: 2 2
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 336 15401
CRC: 3 145
ES: 1 34
SES: 0 4
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 3 hours 34 min 56 sec
FEC: 40348 79109
CRC: 1481 702
ES: 44 160
SES: 28 30
UAS: 49 35
LOS: 0 0
LOF: 0 0
LOM: 15 0
Previous 1 day time = 24 hours 0 sec
FEC: 126844 487
CRC: 2918 31
ES: 50 24
SES: 46 2
UAS: 83 37
LOS: 1 0
LOF: 10 0
LOM: 25 0
Since Link time = 1 hours 3 min 37 sec
FEC: 11099 79096
CRC: 431 700
ES: 26 160
SES: 10 30
UAS: 0 4
LOS: 0 0
LOF: 0 0
LOM: 0 0
#

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

imjolly — Sat, 24 Oct 2020 19:22:07 GMT

Have you checked for line noise. Dial 17070 option 2 should be silent and best with corded phone

have you tried using test socket with filter to see if that helps stability

which master do you have

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

ThinkPadUser — Sat, 24 Oct 2020 19:39:59 GMT

I've had a listen on 17070 and it sounded like a Geiger counter with the crackling on the line. I have the Master Socket 5C and I haven't tested it on the test socket yet.

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

imjolly — Sat, 24 Oct 2020 19:42:24 GMT

If the master is the one where the face clips on and not held by screws then check it is clipped tightly as there have been posts where it was causing problems as not fully clipped

if you can still hear the noise in test socket then need to report phone fault to 151

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

ThinkPadUser — Sat, 24 Oct 2020 19:55:05 GMT

Calling using the test socket seems to fine though there is a low faint hum but no crackling

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

imjolly — Sat, 24 Oct 2020 19:58:06 GMT

A dull hum is normal using a cordless phone but not for corded phone

i would try using test socket with filter for a period and see if that stabilises your line

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

ThinkPadUser — Sat, 24 Oct 2020 20:00:15 GMT

Reseating the master socket removed the crackling though it has a low hum similar to with the test socket though louder, I'm using a corded phone

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

ThinkPadUser — Sat, 24 Oct 2020 20:37:18 GMT

I'm now using the test socket with a DSL filter on it, will report back in a few days to let you know how it goes

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

pippincp — Sat, 24 Oct 2020 21:14:52 GMT

If you have any noise using a corded phone from the test socket then there is a line problem which you need to be rectified.

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

ThinkPadUser — Sat, 24 Oct 2020 23:39:02 GMT

Using the test socket hasn't made much of a difference, still getting disconnected

Re: FTTC dropped connection and DLM kicked in and reduced speeds down to 4mbps

imjolly — Sun, 25 Oct 2020 08:50:45 GMT

if still dropping connection then you need to phone 150 and get engineer