What should I be connected at?

Upstream: (448Kbps)

relative capacity occupation: 52%
noise margin upstream: 21.0 db
output power downstream: 20.0 dbm
attenuation upstream: 21.0 db
carrier load: number of bits per symbol(tone)
tone 0- 31: 00 00 00 02 24 56 77 77 88 77 77 77 76 54 54 00
tone 32- 63: 00 00 00 56 78 99 ab ac cc cc cc dd dc cc dd dd
tone 64- 95: 0c c2 cc cc cc cc cc cc cc cc cc cc cc cc cc cc
tone 96-127: cc cb cb bc bb bb bb bb bb bb bb bb bb bb bb bb
tone 128-159: bb ba ab bb bb bb bb ba bb aa ab aa aa aa aa aa
tone 160-191: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa 99
tone 192-223: 99 99 99 99 99 98 76 89 99 99 99 89 99 99 88 88
tone 224-255: 88 88 86 57 88 88 88 88 88 77 76 65 44 42 20 00

Downstream: (8128Kbps)
relative capacity occupation: 100%
noise margin downstream: 5.5 db
output power upstream: 0.0 dbm
attenuation downstream: 35.5 db
carrier load: number of bits per symbol(tone)
tone 0- 31: 00 00 00 02 24 56 77 77 88 77 77 77 76 54 54 00
tone 32- 63: 00 00 00 56 78 99 ab ac cc cc cc dd dc cc dd dd
tone 64- 95: 0c c2 cc cc cc cc cc cc cc cc cc cc cc cc cc cc
tone 96-127: cc cb cb bc bb bb bb bb bb bb bb bb bb bb bb bb
tone 128-159: bb ba ab bb bb bb bb ba bb aa ab aa aa aa aa aa
tone 160-191: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa 99
tone 192-223: 99 99 99 99 99 98 76 89 99 99 99 89 99 99 88 88
tone 224-255: 88 88 86 57 88 88 88 88 88 77 76 65 44 42 20 00

[ SAR Counters ]
inPkts = 0x0005c85a, inDiscards = 0x000080fb
inF4Pkts = 0x00000000, inF5Pkts = 0x00000000
inDMATaskEnd = 0x00000000, inBufErr = 0x00000000
inCrcErr = 0x000080fb
outPkts = 0x000639d5, outDiscards = 0x00000968
outF4Pkts = 0x00000000, outF5Pkts = 0x00000000
softRstCnt = 0x0000026b

We have somewhat poor SNR downstream as far as I understand it. We connect at 8mbit but usually never get more than 2mbps download speeds at the best of times.

Also, CRC errors suggests downstream packets are getting dropped. Anyone with any experience think that the download speed is being set too high? I have friends two houses down the road who also have MAX and connect at 6Mbps or so.

In reply to:

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We connect at 8mbit but usually never get more than 2mbps download speeds at the best of times.

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Persevere with speedtester.bt.com or your ISP to discover your IP Profile / BRAS rate profile. Sounds like its stuck at 2M.

You're getting full 8M speed at the limit by the look of it. May be worth trying the BT test socket behind the master faceplate to see if SNR improves / errors reduce.