same sync speed every time
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- Re: same sync speed every time
same sync speed every time
11-05-2009 1:48 AM
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Today i have found that even doing a sync at 23.30 i got the same sync speed as when i synced my line week before at midday both 4544 bang on.
Now the old adsl DLM use to sync a diffrent rates even if it was only a few kbps and would vary alot in diffrence between daytime and night time sync's
is this a new feature of the 21cn DLM we dont know about
below is a graph of when i did some snr tweaking abit go notice the DLM when left alone sync's bang on 4544 every time
Re: same sync speed every time
11-05-2009 1:19 PM
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Been same here for a few days now, the dslam seems to have fallen in love with 6655 kbps
regardless of s/n at that time,before this I synced 8 to 9 meg with 6db S/n ,lets hope it's short lived
Later
Re: same sync speed every time
11-05-2009 3:16 PM
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On old DLM one tactic i used to get errors low on my long fast path line was to do a sync at night to set bit loading up for night time noise levels which i found hard to do last night and had to risk raising snr upto around 12db my self
But on the plus side i dont have to worry about my sync speed droping below the theshold for streaming bbc iplayer HD as things stand
I started to see this same sync speed when i killed my old netgear and replaced it with a belkin which was on the 27th april which was just under 3 weeks from going on the trial and that was stuck at sync of 3068 on a 15db target
Then replaced the belkin for a new netgear a few days later 30th or 1st and got the same sync as the belkin but a day later my line dropped and came back with a 9db target and 4544 sync
i est that the stuck sync started 20 days after going on adsl2.
asbo wonders if this is the new training period as all syncs varied in the 20 days
Re: same sync speed every time
13-05-2009 8:31 PM
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i think iam right in thinking all the stuck sync's ive seen are most likley on adsl2 like my self due to the sync speeds i remember seeing in posts that metion stuck sync's.
adsl2+ seem to be having the complete opposite happen to there sync's and have massive difference in sync speeds
Re: same sync speed every time
14-05-2009 6:36 AM
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EDIT:
Cannot force ADSL2 or GDM.t now either , no change in SNR tweaking either 50% still syncs @ 3072 with 15db SNR .
# /usr/sbin/adslctl info --stats
/usr/sbin/adslctl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 0
Channel: FAST, Upstream rate = 856 Kbps, Downstream rate = 3072 Kbps
Link Power State: L0
Mode: ADSL2+
Channel: Fast
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 14.9 7.6
Attn(dB): 55.5 31.5
Pwr(dBm): 18.5 12.4
Max(Kbps): 5760 18392
Rate (Kbps): 3072 856
G.dmt framing
K: 97(0) 108
R: 0 0
S: 1 1
D: 1 1
ADSL2 framing
MSGc: 59 14
B: 96 107
M: 1 1
T: 1 1
R: 0 0
S: 1.0000 4.0000
L: 776 216
D: 1 1
Counters
SF: 31602 25676
SFErr: 0 51035
RS: 0 0
RSCorr: 0 42692
RSUnCorr: 0 0
HEC: 0 72563
OCD: 0 0
LCD: 0 0
Total Cells: 3722920 3906848634
Data Cells: 4974 16751116
Drop Cells: 0
Bit Errors: 0 5723484
ES: 401 5521
SES: 0 1264
UAS: 97 126594
AS: 514
INP: 0.00 0.00
PER: 16.25 20.00
delay: 0.25 1.00
OR: 32.00 8.00
Bitswap: 0 7
Total time = 11 hours 6 min 20 sec
SF = 2450655
CRC = 441
LOS = 0
LOF = 0
ES = 401
Latest 1 day time = 11 hours 6 min 20 sec
SF = 2450655
CRC = 441
LOS = 0
LOF = 0
ES = 401
Latest 15 minutes time = 6 min 20 sec
SF = 23393
CRC = 0
LOS = 0
LOF = 0
ES = 0
Previous 15 minutes time = 15 min 0 sec
SF = 48208
CRC = 2
LOS = 0
LOF = 0
ES = 2
Previous 1 day time = 0 sec
SF = 0
CRC = 0
LOS = 0
LOF = 0
ES = 0
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF = 55428
CRC = 2
LOS = 0
LOF = 0
ES = 2
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF = 55365
CRC = 3
LOS = 0
LOF = 0
ES = 3
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF = 55428
CRC = 5
LOS = 0
LOF = 0
ES = 3
Re: same sync speed every time
14-05-2009 2:37 PM
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any idea how many days after being adsl2+ enabled that this stuck sync started?
Also whats your bitloading like when your syncing on adsl2+ with a sync 3072 ?
I thought the common theme on adsl2 /adsl2+ was that if nothing is used above 1100 KHz the the DLM forces a adsl2 sync
Re: same sync speed every time
14-05-2009 2:55 PM
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Down Up
SNR (dB): 14.9 7.6
Attn(dB): 55.5 31.5
Pwr(dBm): 18.5 12.4
Max(Kbps): 5760 18392
Rate (Kbps): 3072 856
Re: same sync speed every time
15-05-2009 10:16 AM
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My point exactly , that figure is shown on all my routers , i was told not to report it as it was my routers mis reporting so i have done nothing about it , but i don't think thats the case on that being that different brands report such a high upstream max , this was also showing on the test that BT done from my house fluctuating all over the place untill it dropped . Its purley my fault as i buy routers that don't work correctly . :P, misconfigured line maybe i dunno just cannot be bothered with it anymore , my useage is about 3gb this month kids use it sometimes
@ASBOGOG
I would RD in and get some graphs for you ASBO DOG but it seems to be down (wasn't a while ago) . But i do know that its nowhere near 1100khz and that i cant force ADSL2 .
Mark
Re: same sync speed every time
15-05-2009 3:06 PM
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Re: same sync speed every time
15-05-2009 4:12 PM
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again i call for PN to follow up with BTw to see if this is normal built in behaviour of the new DLM or a BUG.
as in markrach's case the fixed sync speed is not a postive thing where in my case its more of a posative effect all tho i would like to beable to set bitloading up at night time noise levels to reduce error rates on fastpath
i didnt get round to capture my bitloading when i was stuck down at 3070 ish i think it may of been 3068 not sure tho.
But this is mine on 4544 fixed sync rate and as you can see after its been synced over night the bit's are being loaded in places out side of the snr which is'nt a gd thing to have.
Re: same sync speed every time
15-05-2009 4:13 PM
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The bit loading plot shows bins above 160 provide an indifferent contribution and those above 200 nothing.
David
Re: same sync speed every time
15-05-2009 4:27 PM
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Re: same sync speed every time
19-05-2009 7:19 PM
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I returned home on sunday and founf connection speed to be 3047 and IP profile at 2500. This has remained the same since then despite numerous reboots and router turn offs etc. It's really annoying
Any ideas anyone?
Re: same sync speed every time
19-05-2009 7:25 PM
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Re: same sync speed every time
19-05-2009 7:28 PM
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- Re: same sync speed every time