I have not had to refer to Kitz for more than two years now as my line problems from 2002 - 2006 turned out to be a faulty line card in the exchange. Anyway, problems have returned.
My exchange was upgraded to 21CN 11 days ago. Almost immediately, it all went wrong.
On the old 20CN/ADSL1 my ST546v6 router reported attenuation of about 49db and SNR of around 13db. I have had a bras rate of either 2.5M or 3.0M for most of the last two years. My link was 'stuck' at a target SNR of 12 or 15db because of the previous problems on my line and my ISP seemed a bit reluctant to get it reset in case it caused problems.
21CN changed all that. My faithful Thomson ST546v6 held the 3,000kbits sync rate for about 12 hours, then it dropped to 1,495 kbits where it stayed. I then tried a Voyager 220V which also sync'd at 3,000kbits before being dumped back to 1,495k. My last throw of the dice was a Billion 7402R2 which also sync'd at the higher rate before being dumped down to - you've guessed it - 1,495 kbits. As you can imagine, my bras dropped to 1.25M.
At that point I raised a call with my ISP who started to chase BT and that's ongoing. After a lot of fiddling around, I've now got the Billion router syncing at 2,270 kbits which is only good enough for a 1.75M service, although this is below the FTR and MSR. WBC regularly reports a potential speed of 3.5M.
My question to you is what router could I try using to improve the compatibility with the exchange? (Assuming BT don't sort things out)
The old exchange equipment was alcatel (ALCB) and the Thomson seemed very happy with that (much better than my old DG834v2 or a Zyxel I had). The new equipment appears to be Texas Instruments (TSTC). Is anyone aware of a router chip, and therefore an adsl router, that is known to be good with TI exchange equipment?
I still have my old DG834 which is a TI AR7 chip but that doesn't seem to cut the mustard. Both my Broadcom routers seem to struggle to get beyond this mystical 1,495 kbits. The Billion is okay but it's still poor. What other routers might I try?
Of course it could be a line fault but as the problems started immediately after the 21CN exchange, I'm guessing it's an exchange related issue - which BT might solve........................or not.
Here are the figures from my router and from the adsl checker.
Connected as ADSL2A
Down sync 2270500
Up sync 447000
Attenuation down 45db
SNR down 17.5db
Attenuation up 28.5db
SNR up 23.5db
Distance from exchange direct - 1.43km
Distance by road - 3.06km
Max speed data from calculator
Line length 3.3km
dslmax 5,888 kbps
adsl21 21CN 7,200kbps
I have no phone extensions and the router is plugged directly into the socket at the moment, although I usually use an ADSLNation faceplate.
Any ideas welcomed.
Thanks
John