Most Stable and Fastest Syncing Router?

[#1]

What have people tried? The Plusnet Thomson 585v7 is a possibility, how is that on the syncing front?

[#2]

I can only speak from my own experience, but my BT HomeHub 3 (bought from a well-known auction site for £40) has synched the fastest of any router I've tried, at over 17mb on a 3dB target noise margin. Currently in synch for around 48 days, although there have been some PPP session drops in that time. With my previous router (HH2) it would re-synch every couple of days on a 6dB target margin.
Delighted with it from a performance POV, but annoyed as most of the settings can't be changed (which from a support POV I suppose is a good thing!)

[#3]

Could you post your full stats?

[#4]

[tt]ADSL uptime: 49 days, 11:06:57
Bandwidth: 1169 / 17115[/tt]
Errors are very high, but I don't notice any fall-off in performance - it's just interleaving doing its thing...
[tt]ADSL Line Status
Connection Information
Line state: Connected
Connection time: 9 days, 08:49:57  <--- see what I mean about PPP connection drops, however it's still a lot better than the HH2
Downstream: 16.71 Mbps
Upstream: 1.142 Mbps

ADSL Settings
VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.5 Annex A
Latency type: Interleaved
Noise margin (Down/Up): 3.1 dB / 6.0 dB
Line attenuation (Down/Up): 24.4 dB / 12.3 dB
Output power (Down/Up): 20.1 dBm / 12.4 dBm
FEC Events (Down/Up): 407154977 / 270
CRC Events (Down/Up): 620131 / 1538
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
HEC Events (Down/Up): 7500972 / 2130
Error Seconds (Local/Remote): 89064 / 940[/tt]

[#5]

Thats interesting - the 3dB target SNR margin
I never knew that the BT system had a lower setting - I'd always assumed that 6dB was the lowest the exchange set target could be set.
......or was it done by getting the DMT tool /Routerstats to lower the target temporaily - until the router is rebooted whereupon it will revert to the exchange set target.
Maybe it's different on ADSL2 (my exchange is still on adslmax)

[#6]

Quote from: sjrinfroyle

What have people tried?

Netgear DG834GT, Thomson ST585 v6, 2Wire 2700HG-B, 2Wire 2700HGV (aka BT Business Hub).
The 2Wires have consistently synced higher than the others by a substantial margin, and they have a good reputation for stability. This is on a fairly long (52·5dB) line, with a TSTC DSLAM. Allegedly the DSLAM manufacturer can make a difference with particular router chipsets.
If you want to try a 2Wire, they're readily available cheaply on eBay.

[#7]

Error

[#8]

My Billion 7800N is good and stable.
ADSL Status
Operational Mode G.DMT
Upstream 448
Downstream 8128
SNR Margin(Upstream) 25.0
SNR Margin(Downstream) 5.1
Line Attenuation(Upstream) 19.0
Line Attenuation(Downstream) 25.0

[#9]

Strat, could you merge this thread with "Thomson TG582N"?
Thank you.

[#10]

Quote from: x47c

Thats interesting - the 3dB target SNR margin

It appears to only be applied to the most stable of lines. Mine is currently sitting at 2.5dB, and I've seen it as low as 2.1dB late at night, but it doesn't ever drop low enough to re-synch. I assume that if that started happening the DLM would revert the target margin to 6dB and reduce the d/l speed accordingly.

[#11]

fwiw, I upgraded to ADSL2+ recently and been assigned a 3db target noise margin to my astonishment after finishing 10 day training.
I previously had a 12db target noise margin on ADSL1 (on 21CN) and often suffered disconnects once a week....
Noise margin could drop as much as 8 or 9db at night.
I wouldn't call my line stable in the past.

If I now resync during the day, I can get up to 7800kbps line speed.
At night, the noise margin drops to -0.5db  (more noise than signal?) according to my 2700HGV v6 router.
CRC errors go through the roof but data throughput of 1500kbps was still achievable. Anything real time like internet radio streaming became 'choppy' though.
In ADSL2+, the router seems reluctant to drop the connection, unlike in ADSL1.  In fact, the only time I've seen it disconnect in ADSL2+ is when I pull the power from the router.
I now sync at dawn or dusk and aim for line speed of 6500kbps @ 3db noise margin.  This allows me to keep the router on 24/7 without severe loss of performance at night or changes to my PN profile.  Lowest reading I've seen at night is 0.5db noise margin at the moment.

DSLAM vendor is TSTC.  53.5db attenuation on ADSL2+ (49db on ADSL1)

fwiw, I have previously tested broadcom routers (eg ST585v6) when I had ADSL1 on 20CN (ALCB) but I found it disconnected much more frequently and line speeds were inferior.  I've not tried a broadcom on 21CN.

[#12]

Quote from: zzZzz

...At night, the noise margin drops to -0.5db  (more noise than signal?) according to my 2700HGV v6 router....

Doesn't negative dB mean the margin is fractional, seeing dB is logarithmic?