Possible banded profile?

Question

Hello everyone,
Until recently I have been acheiving downstream speeds of around 17mbps on speedtest dot net, and as such had no problems with my connection but about a week ago, my downstream is constantly around 2mbps.  I was wondering if my exchange could have seen my line as unstable and placed me into a banded profile due to repeated resets of my previous netgear router which kept overheating and disconnecting from the internet, which i have since replaced with a home hub.  I am on BT option 3 and don't think bt have throttled my speed due to heavy use as I have received no communication from them informing me they have done this.  So, if I am in a banded profile what do i have to do to get out of it?
Any help is much appreciated, here are my stats:
Connection Information
Line state
Connected
Connection time
0 days, 00:58:37
Downstream
18,645 Kbps
Upstream
1,178 Kbps
ADSL Settings
VPI/VCI
0/38
Type
PPPoA
Modulation
G.992.5 Annex A
Latency type
Interleaved
Noise margin (Down/Up)
2.8 dB / 5.9 dB
Line attenuation (Down/Up)
26.9 dB / 8.1 dB
Output power (Down/Up)
28.3 dBm / 1.8 dBm
Loss of Framing (Local/Remote)
0 / 0
Loss of Signal (Local/Remote)
0 / 0
Loss of Power (Local/Remote)
0 / 0
FEC Errors (Down/Up)
2625 / 0
CRC Errors (Down/Up)
6 / 0
HEC Errors (Down/Up)
83 / 0
Error Seconds (Local/Remote)
6 / 0
 Download speedachieved during the test was - 1865 Kbps
 For your connection, the acceptable range of speedsis 800-2000 Kbps.
 Additional Information:
 Your DSL Connection Rate :18644 Kbps(DOWN-STREAM), 1178 Kbps(UP-STREAM)
 IP Profile for your line is - 2000 Kbps

Answer 1

I think what's happening here, is that you're getting the occasional line drop, because of low margin at night.
And because that line drop is falling within the recovery time threshold for IP setting .... the IP is not increasing.
21CN connections often utilise low margin, and also banded profiles for high margin.
Banded profiles come about because of excessive connection noise, and the high noise margin is merely impulse noise protection to try and cover the line characteristics .... you don;t have this problem, as Don has said.
Your situation is that the msan is trying to run the connection at target 6db, which is normal, but the margin is falling a little, a common occurence, and when it falls too low, it'll cause a drop, and if that drop is within recovery as stated, it resets the time control for that recovery .... and I think this because you have an excellent sync rate, but very low IP profile. Clearly it has dropped some way, making me think at some point the line drops
were multiple events.
What to do now .... leave everything alone, no resets as the guys have said. Check to see over the next 5 days, or from the last time you know the hub dropped the connection, and see if it happened at night time.
If it does, and the margin is not increased to compensate, and you will see from the stats the following day, then drop a message in to the mods.
They can ask for an increase in target noise margin, maybe set it to 9db ... and then it should sustain itself, and the IP will then begin to come up, to what it should be for the sync rate. 
BT Forum Moderation Team <[email protected]>
Important thing is though.... just leave well alone, no resets or iinterference, you have the basis for an excellent connection here .... if you can just get over this minor low margin bug.