| What are normal stats on Modem I've seen a few of these printed on the forum, but after my latest adjustments, I seem to be getting some very high error rates. At the same time I am still seeing a lot of freezes on my Tv, some for a minute or two. Can anybody tell me if these figures are normal?
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VDSL Training Status: Showtime
VDSL Profile: Profile 8b
Traffic Type: PTM Mode
Link Uptime: 0 day: 3 hours: 11 minutes
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VDSL Port Details Upstream Downstream
Line Rate: 2.104 Mbps 21.101 Mbps
Actual Net Data Rate: 2.047 Mbps 21.051 Mbps
Trellis Coding: ON ON
SNR Margin: 23.0 dB 23.2 dB
Actual Delay: 8 ms 8 ms
Transmit Power: 8.9 dBm 18.6 dBm
Receive Power: 0.4 dBm 1.9 dBm
Actual INP: 25.0 symbols 30.0 symbols
Total Attenuation: 9.0 dB 16.6 dB
Attainable Net Data Rate: 5.636 Mbps 51.072 Mbps
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VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 9.9 40.5 N/A N/A 20.3 50.2 N/A
Signal Attenuation(dB): 9.9 37.6 N/A N/A 20.3 50.2 N/A
SNR Margin(dB): 23.1 23.0 N/A N/A 28.2 17.6 N/A
Transmit Power(dBm): 0.5 8.3 N/A N/A 17.9 10.3 N/A
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VDSL Counters
Downstream Upstream
Since Link time = 11 min 7 sec
FEC: 755 0
CRC: 1100 0
ES: 7 0
SES: 6 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 6 min 23 sec
FEC: 19 0
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: 33 0
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 = 7 hours 6 min 23 sec
FEC: 4356184 182
CRC: 27807 0
ES: 282 0
SES: 117 0
UAS: 40 40
LOS: 10 0
LOF: 10 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 9463410 1
CRC: 45919 1
ES: 372 1
SES: 178 0
UAS: 76 76
LOS: 20 0
LOF: 20 0
LOM: 0 0
Total time = 1 days 7 hours 6 min 23 sec
FEC: 37776614 506
CRC: 218831 6
ES: 2287 9
SES: 704 4
UAS: 369 369
LOS: 61 0
LOF: 61 0
LOM: 4 0
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| Saying what is "normal" is always dangerous in the land of ADSL/VDSL stats but I can tell you that some of these numbers are not a good sign.
The ES, SES and UAS numbers. Having a few counts on ES is OK but SES only starts counting after 10 seconds of error and UAS indicates you were actually losing sync at times.
Is the VDSL modem plugged in as close to the house entry as possible? |
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| The modem is on the second floor about half the length of the house away from the dmarc. Call it, say, 25 ft. |
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| Do you have other phone outlets hung off the wiring? Phones plugged in?
The quality of the copper pair from the CO/remote to the premises can have significant bearing on the quality of a VDSL circuit as can the nature of the wiring on the premises.
The stats uploaded suggest that you are actually relatively close to the CO/remote (good S/N, good attainable rates) but the high errors perhaps suggest noise/crosstalk problems either within the premises or on the external line. |
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| Six operating phones in the house. I used to have a lot of outages when it rained on my phone landline, so I got rid or it and went to cable.
It's underground wiring in the subdivision. About 25 years old. They replaced the copper from the end of the street since then, but I don't believe they did anything with the copper from the box in the yard up to my house. |
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| If at all possible I suggest that you try to have the VDSL modem/router attached to an outlet as close to the demarc as possible - and disconnect any phones for a while to see if the stats improve. If they don't the problem is probably outside your control and CB need to find the problem on their side of the demarc. |
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