ADSL2 line training - what to expect?

[#1]

Before I got my line upgraded to ADSL2, I had 0 TX and 0 RX errors at a rock solid 8Mbit/sec
I am now seeing an increasing count of RX CRC errors, is this normal during the training period (i'm guessing training involves turing the wick back until the CRC errors stop?)
My Line stats currently show:

ADSL Information       ( ADSL Firmware Version:  2471201_A) 
  ATM Statistics	TX Cells	RX Cells	TX CRC errs	RX CRC errs
  	             484780	     13091268	   0          11869

 ADSL Status	Mode	State	Up Speed	Down Speed	SNR Margin	Loop Att.
  	ADSL2+(G.992.5)	SHOWTIME	443928	15768266	7	27

Which is a slightly slower sync speed than yesterday

[#2]

It tunes the circuit until an acceptable error rate is reached.
It is possible that the default nose margin has increased from 3dB to 6dB
You are leaving the router on all the time I assume

[#3]

The router is on all the time.  I did reboot it last night, as there is some firmware with a different modem code that is recommended by Draytek to be better for ADSL2+ so I loaded that.

[#4]

If you rebooted in the evening then you would get a slower speed
The error rate is very low so no problem there
I would just leave it alone until after the training period then you can ask for the upstream to be uncapped

[#5]

Quote from: Oldjim

The error rate is very low so no problem there

I wouldn't exactly call the error rate low:

Quote from: ClashcityRocker

ADSL Information       ( ADSL Firmware Version:  2471201_A)  ATM Statistics TX Cells RX Cells TX CRC errs RX CRC errs               484780     13091268   0          11869

If you aren't having any speed problems, I wouldn't worry however.
I would expect a maximum of sync speed of about 17Mb/s and a maximum download speed of about 16Mb/s.

[#6]

As the previously reported speed was 8Mb/sec I assumed that the line was on Fast Path and that this would have carried over.
On that basis I considered that the error rate was low
On the other hand - if the line was interleaved - I would agree that they are a bit high

[#7]

Hi ClashcityRocker,
Interleaving is currently off so that's probably the reason you're seeing the errors. I'm sure putting interleaving on would rectify that.
Jojo

[#8]

I did raise a ticket ages back when I was on ADSL Max, to switch interleaving off, and I continued to have a rock solid connection (zero disconnects, and only a handful of RX errors over many months of use, my router uptime is really good).
Should I request that interleaving is enabled on my line now I have ADSL2?
I see alot of pages that "stall" and the error rate continues to rise.
Should I wait until the training period is over?
What's the deal with the upload uncap? 
Thanks.

[#9]

I'd certainly wait for the training period to finish. It will probably be best to switch interleaving on if you're having these problems. On ADSL2+ you can upcap the upload, but I would see if we can get your line stable before we do that.

[#10]

Hi, line has stabilized, and I think the training period is over.  There are still a few errors, but nothing like before.

ADSL Information       ( ADSL Firmware Version:  2471201_A) 
  ATM Statistics	TX Cells	RX Cells	TX CRC errs	RX CRC errs
  	6022655	20138927	0	1088
  ADSL Status	Mode	State	Up Speed	Down Speed	SNR Margin	Loop Att.
  	ADSL2+(G.992.5)	SHOWTIME	444937	16045714	5	27

Would it be possible to turn ON interleaving and uncap the upload.    Thanks.

[#11]

Question #52784298

[#12]

Hi ClashcityRocker,
I've placed the order for you, should complete tomorrow. The upstream will be uncapped, and it will turn interleaving on (though at present it's on 'auto' and turned on).
Hope that helps.