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[boost]

As a complete aside, I've seen those DSLAMs exceed 832Kb/s upstream in ADSL1 mode which I had thought wasn't possible...?

[loonylion]

maximum upstream in the adsl1 and 2 spec is 1.3mbit.

[boost]

Interesting. Native or with s=1/2?

Have you come across any BT products that advertise a synch speed higher than 832Kb up for ADSL1?

[loonylion]

I've not come across any products offering it, no. I've just read in various places that 1.3mbit is what the spec allows for upstream.

[roseway]

That's confirmed by this: https://en.wikipedia.org/wiki/Asymmetric_digital_subscriber_line#ADSL_standards (see G.dmt)

[notaclue]

Another day, another resync.

Code: [Select]

Stats recorded 31 Jul 2014 22:19:37

DSLAM/MSAN type:        IFTN:0x71c8 / v0x71c8
Modem/router firmware:  AnnexA version - A2pD030g.d22j
DSL mode:                ADSL2+
Status:                  Showtime
Uptime:                  9 hours 57 min 22 sec
Resyncs:                0 (since 31 Jul 2014 12:22:34)

Downstream Upstream
Line attenuation (dB):  10.0 4.6
Signal attenuation (dB): 10.0 4.4
Connection speed (kbps): 20127 443
SNR margin (dB):        5.8 31.3
Power (dBm):            0.0 12.4
Interleave depth:        1 1
INP:                    0 0

RSCorr/RS (%):          N/A N/A
RSUnCorr/RS (%):        N/A N/A
ES/hour:                0 0

On the whole sale tester (and speedtest.net) the download seems to go no faster than 12. Not quite sure why it's saying 20 :S

[boost]

It's going in the right direction!

Your power value has taken another day off though

[konrado5]

notaclue: attach new Hlog, SNR margin and new QLN.

[burakkucat]

On the whole sale tester (and speedtest.net) the download seems to go no faster than 12. Not quite sure why it's saying 20 :S

The speed tests are measuring throughput whereas that line in your statistics is showing the synchronisation speed between the DSLAM/MSAN and CPE. They are two different entities. 

[notaclue]

The speed tests are measuring throughput whereas that line in your statistics is showing the synchronisation speed between the DSLAM/MSAN and CPE. They are two different entities. 

fffffffffff of course.

notaclue: attach new Hlog, SNR margin and new QLN.

The graphs are basically the same which is why I didn't post them. The only thing that has changed is the SNRM on my download which as dropped to 6, which is also in the stats I posted.

It's going in the right direction!

Your power value has taken another day off though

I wondered if anyone would notice Seems rather peculiar.

I'm hoping my upload will return to normal within a few days.

[boost]

The graphs are basically the same which is why I didn't post them. The only thing that has changed is the SNRM on my download which as dropped to 6, which is also in the stats I posted.

The HLOG will be different.
Edge of my seats here tbh so get it posted up ASAP!

[notaclue]

It's really not changed at all. Honestly.

[boost]

Lumpy initial red vanished.
Job done!

[notaclue]

Lumpy initial red vanished.
Job done!

Yeah, it's currently

Code: [Select]

Stats recorded 01 Aug 2014 22:57:37

DSLAM/MSAN type:        IFTN:0x71c8 / v0x71c8
Modem/router firmware:  AnnexA version - A2pD030g.d22j
DSL mode:                ADSL2+
Status:                  Showtime
Uptime:                  4 hours 13 min 3 sec
Resyncs:                0 (since 31 Jul 2014 12:22:34)

Downstream Upstream
Line attenuation (dB):  10.0 4.6
Signal attenuation (dB): 10.0 4.3
Connection speed (kbps): 21927 1187
SNR margin (dB):        2.2 7.1
Power (dBm):            0.0 11.9
Interleave depth:        1 1
INP:                    0 0

RSCorr/RS (%):          N/A N/A
RSUnCorr/RS (%):        N/A N/A
ES/hour:                1.58 0



(my isp isnt at&t, but okay...)

Is there any reason for the QLN being so high? Maybe it's always been this high.

Maybe I should take this back into the QLN topic since really the big issue appears to have been resolved. Thank you very much gentlemen.

[kitz]

I've not come across any products offering it, no. I've just read in various places that 1.3mbit is what the spec allows for upstream.

No me neither, its always in the 800 region.   The one thing that does occur to me though is that upstream is heavily shaped and has PSD masks applied to form the familiar inverted 'U' shape to prevent crosstalk.    This means that the upstream tones are never fully bit-loaded at certain frequencies - even if power cut back isnt applied.