ADSL2+ regrade complete, no sync rate increase?

[TheDuke]

Hey

So my regrade to an ADSL2+ service completed on Thursday and I'm a bit concerned that I haven't seen an increase in sync rate on my router.  From what I've read elsewhere people who have re-graded see an increase in sync rate immediately and the IP Profile increases over the training period.

So what should I be expecting?

Thanks
Ben

Current stats below:-
Downstream
Download speed achieved during the test was - 5842 Kbps
For your connection, the acceptable range of speeds is 2000-7150 Kbps.
Additional Information:
Your DSL Connection Rate :7126 Kbps(DOWN-STREAM), 888 Kbps(UP-STREAM)
IP Profile for your line is - 6286 Kbps

Upstream
Upload speed achieved during the test was - 741 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 888 Kbps

Router
Line Attenuation: (Down)44.5db (Up)24.4db
Noise Margin: (Down)5.4db (Up)9.8db

[Rik]

That looks weird, your upstream shows you have been switched, and with your attenuation I'd expect a better d/s sync speed. What router are you using?

[TheDuke]

It's a netgear DGND3300.

Some details below.
Firmware Version:  V2.1.00.48_1.00.48
ADSL Firmware Version: A2pB023k.d20k_rc2
http://www.netgear.co.uk/home/products/wirelessrouters/high-performance/DGND3300.aspx

And uptime

Port	Status	TxPkts	RxPkts	Collisions	Tx B/s	Rx B/s	Up Time
WAN	PPPoA	1039432	1394567	0	2857	10055	34:51:04

[Rik]

How's the router connected to the phone line, eg master socket, hard-wired extension, flying lead extension? What else is connected to the line?

[Steve]

Also which adsl modality is the router/modem using it should be ITU G.992.5 Annex M

[TheDuke]

The router connects straight to the master socket, there is some extension wiring from the master socket but only a phone is attached.  I'm using an adslnation nte5 faceplate.
Unfortunately the router EWS doesn't provide me with the modality information, I think i can enable telnet and get it though, will do that now.

Ben

[Rik]

Try removing the faceplate and plugging in to the test socket, Ben. Check your stats as soon as the router resyncs.

[TheDuke]

Heres the adsl stats from telnet hope it's what you were after. EDIT: BEFORE TEST SOCKET

Code Select Expand

# adslctl info --stats
adslctl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 8000
Channel: FAST, Upstream rate = 888 Kbps, Downstream rate = 7126 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):       5.5             10.0
Attn(dB):       44.5            24.4
Pwr(dBm):       0.0             12.7
Max(Kbps):      7964            888
Rate (Kbps):    7126            888
                        G.dmt framing
K:              223(0)          14
R:              16              16
S:              1               8
D:              32              8
                        ADSL2 framing
MSGc:           59              10
B:              222             13
M:              1               8
T:              1               9
R:              16              16
S:              0.9968          4.0000
L:              1918            256
D:              32              8
                        Counters
SF:             8907903         560182
SFErr:          4420            4294967264
RS:             579013696               2567094
RSCorr:         2806742         0
RSUnCorr:       79292           0

HEC:            4034            4294967285
OCD:            212             0
LCD:            0               0
Total Cells:    2425140631              50501
Data Cells:     30739184                62
Drop Cells:     14762
Bit Errors:     0               0

ES:             1434            0
SES:            16              0
UAS:            37              0
AS:             144302

INP:            1.06            2.00
PER:            16.19           18.00
delay:          7.97            8.00
OR:             32.10           7.11

Bitswap:        17495           3680

Total time = 1 days 16 hours 60 sec
SF  = 8907903
CRC = 4420
LOS = 0
LOF = 0
ES  = 1434
Latest 1 day time = 16 hours 60 sec
SF  = 3559410
CRC = 780
LOS = 0
LOF = 0
ES  = 291
Latest 15 minutes time = 60 sec
SF  = 3715
CRC = 0
LOS = 0
LOF = 0
ES  = 0
Previous 15 minutes time = 15 min 0 sec
SF  = 55602
CRC = 30
LOS = 0
LOF = 0
ES  = 11
Previous 1 day time = 24 hours 0 sec
SF  = 5348493
CRC = 3640
LOS = 0
LOF = 0
ES  = 1143
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF  = 55539
CRC = 41
LOS = 0
LOF = 0
ES  = 16
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF  = 55539
CRC = 50
LOS = 0
LOF = 0
ES  = 18
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF  = 55540
CRC = 37
LOS = 0
LOF = 0
ES  = 15
Showtime Drop Reason:   8000
Last Retrain Reason:    8000

[Rik]

That looks OK.

[Steve]

I wonder if BT have set the adsl2+ profile at adslmax, (but they don't usually do that without being asked), not sure how that would show up in the adsl info

[TheDuke]

Stats on the test socket.

ADSL Link Downstream Upstream
Connection Speed 7438 kbps 888 kbps
Line Attenuation 44.5 db 24.5 db
Noise Margin 6.2 db 11.4 db

Code Select Expand

# adslctl info --stats
adslctl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 8000
Channel: FAST, Upstream rate = 888 Kbps, Downstream rate = 7438 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):       6.2             11.4
Attn(dB):       44.5            24.5
Pwr(dBm):       0.0             12.9
Max(Kbps):      8940            888
Rate (Kbps):    7438            888
                        G.dmt framing
K:              233(0)          14
R:              16              16
S:              1               8
D:              32              8
                        ADSL2 framing
MSGc:           59              10
B:              232             13
M:              1               8
T:              1               9
R:              16              16
S:              0.9979          4.0000
L:              1996            256
D:              32              8
                        Counters
SF:             5380            4849
SFErr:          0               0
RS:             349708          87295
RSCorr:         142             0
RSUnCorr:       0               0

HEC:            0               0
OCD:            0               0
LCD:            0               0
Total Cells:    1517386         1241086
Data Cells:     30814           34054
Drop Cells:     14762
Bit Errors:     0               3397

ES:             1446            0
SES:            17              119
UAS:            101             0
AS:             88

INP:            1.02            2.00
PER:            16.21           18.00
delay:          7.98            8.00
OR:             32.06           7.11

Bitswap:        6               0

Total time = 1 days 16 hours 12 min 27 sec
SF  = 8943436
CRC = 4910
LOS = 1
LOF = 9
ES  = 1446
Latest 1 day time = 16 hours 12 min 27 sec
SF  = 3594943
CRC = 1270
LOS = 1
LOF = 9
ES  = 303
Latest 15 minutes time = 12 min 27 sec
SF  = 39248
CRC = 490
LOS = 1
LOF = 9
ES  = 12
Previous 15 minutes time = 15 min 0 sec
SF  = 55602
CRC = 30
LOS = 0
LOF = 0
ES  = 11
Previous 1 day time = 24 hours 0 sec
SF  = 5348493
CRC = 3640
LOS = 0
LOF = 0
ES  = 1143
15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
SF  = 55539
CRC = 41
LOS = 0
LOF = 0
ES  = 16
15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
SF  = 55539
CRC = 50
LOS = 0
LOF = 0
ES  = 18
15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
SF  = 55540
CRC = 37
LOS = 0
LOF = 0
ES  = 15
Showtime Drop Reason:   8000
Last Retrain Reason:    8000


[Rik]

It's almost as if BT have profiled the line to Max. This is one for support, I'm afraid, but they won't be able to do anything until Tuesday, when BT re-open.

[TheDuke]

Ok Thanks Rik and Steve, most helpful!  Will post the outcome here.

[Rik]

Good luck.

[jezuk1]

The router is reporting information for G.DMT and also ADSL2 framing - seems strange? Normally I would only expect to see ADSL2 framing information unless I am mistaken 

[TheDuke]

Yeah.. I don't pretend to understand half of whats in that status stuff, but it does say ADSL2+ at the top so I guess it's supposed to be that way.

[Steve]

I think that's why we are thinking the adsl2+ profile is set at adslmax. What I'm not sure is what you see if the adsl modality in the router/modem is set to G.DMT

[.Griff.]

Given your downstream attenuation your current sync speed looks spot on to me.

[jezuk1]

Agree, the sync speed you have looks pretty much normal for your line length / attenuation. Assuming nothing is wrong with your line then I'd say it's about 3 to 3.5km in length (reference 1 below). If you look at the fancy graphs on the reference 2 you'll note that beyond about 3km the difference between ADSL and ADSL2 tends towards insignificance. You only really get a significant speed increase for lines less than 3km (or those <about 40db attenuation)

In summary - your ADSL2 sync speeds look entirely normal 

Reference 1:
http://whirlpool.net.au/wiki/dslam_speeds

Reference 2:
http://en.wikipedia.org/wiki/G.992.1

[TheDuke]

Yeah, looks about right after seeing the graphs.

[Steve]

Kitz certainly is in agreement regarding the current sync although suggests a gain over adslmax of around 1500Kbps.

http://www.kitz.co.uk/adsl/max_speed_calc.php