I was* on a 51dB line, with a Texas Inst. DSLAM, a 9dB Target noise margin since May '08, and now have a small collection of routers
gathered in my quest for line stability.
My mainstay router has been the 585v6 (7.4.3.2 f/w), which generally gives a decent sync and is pretty stable.
The Netgear DG834gv2 sync'd a fair bit quicker, but the Routerstats SNR trace was a bit wild, especially at dark, and it dis-connected quite regular. The DG834gv3 (4.01.37 f/w) was a lot more stable compared to the v2, with sync figures and stability similar to the Speedtouch, although I seem to remember the 585v6 had slightly better stabilty, maybe. The DG834gv4 was a disappointment with the supplied V5.01.01 f/w, syncing at only 3,300kbps during daylight (the 585v6 was syncing at 4,500kbps immediately after), but upgrading to V5.01.09 brought it up to about 4,300kbps sync rate, and stability seems ok. The main reason for buying the v4 was to play with DMT
, which set at 50%, gave about 5000+kbps during the day, although I sync'd during darkness for more stability, and trying to judge a re-sync to hold an IP profile of 3,500.
I also had a brief fling with a 2Wire 2700HGV, this sync'd roughly a couple of hundred kb faster than the Speedtouch, but with less stability, ie, more disconnects.
I've recently downloaded the latest DGteam firmwares for the Netgears, and was particularly thinking about trying it on the v3 to see how that goes. Has anyone tried that yet?
One thing I've noticed, is since replacing my dect phone with a new one, the FEC's seem to have dropped, but still with bursts now and again. Last night I noticed they were racking up again and switched off the dect at the plug resulting in the FEC count hardly changing. I switched the dects back on, and it's been ok so far, with only about 10,000 in the last 10 hrs uptime. I rebooted the Speedtouch last night after 25 days sync, to see if the Target had dropped, but alas, no. Maybe the 360 million FEC's had something to do with that, although some think that these don't count as errors...
*Att'n was in region of 49-52dB (reported 5.1km length) depending on router, but BT did some general work across the road recently, with a result of 44dB, and increased sync rate.
I'm currently syncing at night, presently at 4,224kbps with the 585v6, in order to get a decent uptime with relativly low-ish errors, to try and get back to a 6dB Target margin.