You should ask TalkTalk to upgrade you to their 110/40 meg service

On a serious note why can't the modem sync at the full 80000/20000 kbps instead of 79999/19999 kbps?

How does one tell if interleaving is on or off?

Basically by examining the "D:" line in the output from xdslcmd info --stats

"1" is Fast Path in that direction. Any other number shows the degree of interleaving.

On FTTC it isn't quite that simple, as there can be error correction and latency delay parameters set even without interleaving.

Edit - also see this post.

Edited by RobertoS (Tue 13-May-14 14:49:50)

In reply to a post by Seansmit17:

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# xdslcmd info --state xdslcmd: ADSL driver and PHY statusStatus: Showtime Retrain Reason: 0Max:    Upstream rate = 37399 Kbps, Downstream rate = 109464 Kbps Path:   0, Upstream rate = 19999 Kbps, Downstream rate = 79999 Kbps  # xdslcmd info --pbParamsxdslcmd: ADSL driver and PHY status Status: ShowtimeRetrain Reason: 0 Max:    Upstream rate = 37399 Kbps, Downstream rate = 109236 KbpsPath:   0, Upstream rate = 19999 Kbps, Downstream rate = 79999 Kbps  Discovery Phase (Initial) Band Plan US: (0,95) (868,1207) (1972,2783)DS: (32,859) (1216,1963) (2792,3971) Medley Phase (Final) Band PlanUS: (0,95) (868,1207) (1972,2783) DS: (32,859) (1216,1963) (2792,3971)       VDSL Port Details       Upstream        Downstream Attainable Net Data Rate:      37399 kbps        109236 kbpsActual Aggregate Tx Power:        6.6 dBm          13.5 dBm ============================================================================  VDSL Band Status        U0      U1      U2      U3      D1      D2      D3   Line Attenuation(dB):  3.6     18.5    26.8     N/A    9.9     22.1    33.7  Signal Attenuation(dB):  3.6     17.8    25.9     N/A    9.9     22.1    33.7          SNR Margin(dB):  25.1    23.2    23.5     N/A    14.1    14.1    14.1           TX Power(dBm): -7.6    -27.1    6.5      N/A    10.4    7.9     7.0  #

Well its been one month on FTTC. Lets see how my stats are one month on:

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# xdslcmd info --pbParams xdslcmd: ADSL driver and PHY statusStatus: Showtime Retrain Reason: 0Max:    Upstream rate = 36472 Kbps, Downstream rate = 106348 Kbps Path:   0, Upstream rate = 19999 Kbps, Downstream rate = 79999 Kbps  Discovery Phase (Initial) Band PlanUS: (0,95) (868,1207) (1972,2783) DS: (32,859) (1216,1963) (2792,3971)Medley Phase (Final) Band Plan US: (0,95) (868,1207) (1972,2783)DS: (32,859) (1216,1963) (2792,3971)        VDSL Port Details       Upstream        DownstreamAttainable Net Data Rate:      36472 kbps        106348 kbps Actual Aggregate Tx Power:        6.6 dBm          13.4 dBm============================================================================   VDSL Band Status        U0      U1      U2      U3      D1      D2      D3  Line Attenuation(dB):  3.6     18.6    27.0     N/A    9.9     22.3    33.9  Signal Attenuation(dB):  3.6     17.8    26.2     N/A    9.9     22.3    33.9          SNR Margin(dB):  23.2    23.3    23.3     N/A    13.2    13.2    13.4           TX Power(dBm): -7.2    -26.2    6.5      N/A    10.4    7.8     7.0

So stats are almost the same. Lost a little bit of the max attainable. Looks like more people getting FTTC.

Speeds have been a constant 75mb down and 17-18mb up.

Happy days!

Also, as asked, why do I connect at 79999/19999 and not 80000/20000 ?

Edited by Seansmit17 (Wed 21-May-14 19:41:00)

In reply to a post by Seansmit17:

Also, as asked, why do I connect at 79999/19999 and not 80000/20000 ?

I think it's to do with the way the bits are spread out in the bands, each band can only carry a given amount of bits.

Noticed something today.

My attainable rate has been dropping at a steady pace as other ppl jump on the FTTC band wagon.

I was at 109mb to start with and down to 103mb and upload was at 36mb and then down to 32mb at last check 2 days ago.

and today I see this:

Attainable rate (kbit/s) 98788 40912
SNR margin (dB) 11.2 15.2
Line attenuation (dB) 0 0
Output power (dBmV) 13.3 6.7

Download has took a dive down a few mb and the upload has gone up!

What could explain this?

My download/upload connection is still at 80/20 so no issue there.

Gave the modem a reboot and got this.

Attainable rate (kbit/s) 98832 33656
SNR margin (dB) 11.2 15.3
Line attenuation (dB) 0 0
Output power (dBmV) 13.4 6.7

Odd that my upload would jump like that?

Edited by Seansmit17 (Tue 24-Jun-14 18:45:53)