Broadband Related > FTTC and FTTP Issues

3dB SNR - how to achieve?

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dee.jay:
Mission accomplished...

Thanks j0hn for your advice on this.

AAISP


--- Code: ---Stats summary
Stats recorded 29 Sep 2018 08:11:50

DSLAM type / SW version: BDCM:0xb12d (177.45) / v0xb12d
Modem/router firmware:  AnnexA version - A2pv6C038m.d24j
DSL mode:                VDSL2 Profile 17a
Status:                  Showtime
Uptime:                  0 hour 0 min 28 sec
Resyncs:                3 (since 18 Sep 2018 13:22:48)

Downstream Upstream
Line attenuation (dB):  18.7 0.0
Signal attenuation (dB): Not available on VDSL2
Connection speed (kbps): 67147 16269
SNR margin (dB):        3.3 6.0
Power (dBm):            12.7 7.6
Interleave depth:        8 1
INP:                    47.00 0
G.INP:                  Enabled Not enabled
Vectoring status:        5 (VECT_UNCONFIGURED)

RSCorr/RS (%):          0.0525 0.0000
RSUnCorr/RS (%):        0.0000 0.0000
ES/hour:                1.22 3.18
Connection stats
xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 16269 Kbps, Downstream rate = 66560 Kbps
Bearer: 0, Upstream rate = 16269 Kbps, Downstream rate = 67147 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): 3.3 6.0
Attn(dB): 18.7 0.0
Pwr(dBm): 12.7 7.6
VDSL2 framing
Bearer 0
MSGc: -6 25
B: 243 239
M: 1 1
T: 0 64
R: 10 14
S: 0.1157 0.4693
L: 17561 4330
D: 8 1
I: 254 127
N: 254 254
Q: 8 0
V: 0 0
RxQueue: 52 0
TxQueue: 13 0
G.INP Framing: 18 0
G.INP lookback: 13 0
RRC bits: 0 24
Bearer 1
MSGc: 154 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 6.4000 0.0000
L: 40 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 3604
OHFErr: 0 0
RS: 929728 230632
RSCorr: 488 0
RSUnCorr: 0 0
Bearer 1
OHF: 1742 0
OHFErr: 0 0
RS: 16809 0
RSCorr: 0 0
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 45141 0
rtx_c: 29151 0
rtx_uc: 255960 0

G.INP Counters
LEFTRS: 81 0
minEFTR: 67137 0
errFreeBits: 3038388806 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 3575877 0
Data Cells: 52 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: 72 1395
SES: 53 7
UAS: 388 336
AS: 28

Bearer 0
INP: 47.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 0.00 7.53
OR: 0.01 32.90
AgR: 67215.92 16301.67

Bearer 1
INP: 4.50 0.00
INPRein: 4.50 0.00
delay: 3 0
PER: 16.06 0.01
OR: 79.68 0.01
AgR: 79.68 0.01

Bitswap: 0/0 1/1

Total time = 1 days 23 hours 56 min 10 sec
FEC: 6772465 56282
CRC: 6744 1544
ES: 72 1395
SES: 53 7
UAS: 388 336
LOS: 5 0
LOF: 44 0
LOM: 0 0
Latest 15 minutes time = 11 min 10 sec
FEC: 535 4
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 31 31
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 28 3
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 23 hours 56 min 10 sec
FEC: 10431 483
CRC: 546 77
ES: 10 67
SES: 10 0
UAS: 67 57
LOS: 1 0
LOF: 9 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 9084 21102
CRC: 0 96
ES: 0 95
SES: 0 7
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 27 sec
FEC: 488 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
#
--- End code ---

Sky


--- Code: ---

Stats summary
Stats recorded 29 Sep 2018 08:14:32

DSLAM type / SW version: BDCM:0xb12d (177.45) / v0xb12d
Modem/router firmware:  AnnexA version - A2pv6C038m.d24j
DSL mode:                VDSL2 Profile 17a
Status:                  Showtime
Uptime:                  2 days 22 hours 50 min 18 sec
Resyncs:                0 (since 26 Sep 2018 13:01:30)

Downstream Upstream
Line attenuation (dB):  19.3 0.0
Signal attenuation (dB): Not available on VDSL2
Connection speed (kbps): 69208 16743
SNR margin (dB):        3.1 5.8
Power (dBm):            12.8 7.5
Interleave depth:        8 1
INP:                    49.00 0
G.INP:                  Enabled Not enabled
Vectoring status:        5 (VECT_UNCONFIGURED)

RSCorr/RS (%):          0.5417 1.3117
RSUnCorr/RS (%):        0.0000 0.0000
ES/hour:                0.48 5.58
Connection stats
xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 16743 Kbps, Downstream rate = 68420 Kbps
Bearer: 0, Upstream rate = 16743 Kbps, Downstream rate = 69208 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): 3.1 5.8
Attn(dB): 19.3 0.0
Pwr(dBm): 12.8 7.5
VDSL2 framing
Bearer 0
MSGc: -6 24
B: 243 239
M: 1 1
T: 0 64
R: 10 14
S: 0.1123 0.4560
L: 18100 4456
D: 8 1
I: 254 127
N: 254 254
Q: 8 0
V: 0 0
RxQueue: 56 0
TxQueue: 14 0
G.INP Framing: 18 0
G.INP lookback: 14 0
RRC bits: 0 24
Bearer 1
MSGc: 154 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 6.4000 0.0000
L: 40 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 460557
OHFErr: 20 407
RS: 460839560 3371727
RSCorr: 2496394 44227
RSUnCorr: 0 0
Bearer 1
OHF: 15876419 0
OHFErr: 0 0
RS: 158763579 0
RSCorr: 77 0
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 148554879 0
rtx_c: 11838 0
rtx_uc: 433 0

G.INP Counters
LEFTRS: 70 0
minEFTR: 69196 0
errFreeBits: 315466228 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 3875239175 0
Data Cells: 1772502994 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: 5 368
SES: 0 0
UAS: 119 119
AS: 255018

Bearer 0
INP: 49.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 0.00 7.32
OR: 0.01 32.76
AgR: 69278.98 16776.04

Bearer 1
INP: 4.50 0.00
INPRein: 4.50 0.00
delay: 3 0
PER: 16.06 0.01
OR: 79.68 0.01
AgR: 79.68 0.01

Bitswap: 123447/123447 4785/4787

Total time = 1 days 1 hours 57 min 54 sec
FEC: 2602483 44285
CRC: 20 424
ES: 5 368
SES: 0 0
UAS: 119 119
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 12 min 54 sec
FEC: 31014 12
CRC: 11 1
ES: 2 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 7187 15
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 1 hours 57 min 54 sec
FEC: 80616 69
CRC: 11 12
ES: 2 10
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 809249 682
CRC: 8 130
ES: 2 115
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 2 days 22 hours 50 min 17 sec
FEC: 2496394 44227
CRC: 20 407
ES: 5 355
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
#

--- End code ---

kitz:
Excellent :)

Weaver:
> You can tell if it is Retx High/Low from the below part of your stats.

That is a good tip, from j0hn.

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