I have decided to give 21CN another go, as it would be nice to have a working 21CN connection. So signed up last week and migration went through this morning at about 9:30am.
Now connected at:
Modulation: G.992.5 Annex A
Bandwidth (Up/Down) [kbps/kbps]: 888 / 17,387
Data Transferred (Sent/Received) [MB/MB]: 10.67 / 95.59
Output Power (Up/Down) [dBm]: 12.0 / 0.0
Line Attenuation (Up/Down) [dB]: 10.5 / 23.0
SN Margin (Up/Down) [dB]: 15.5 / 6.0
- it all just works I am shocked and pleased

.
Speedtest:
http://www.speedtest.net/result/471735438.png
This is from a line that refused to work properly with entas 21CN - had lots of throughput issues. It seems it just works right from the word go on aaisp

. Although I notice since the line is interleaved the upload seems to be capped at 888, but meh. As long as it works