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Standard User MHC
(sensei) Wed 10-Jan-18 15:39:08
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Re: Drop in upstream sync


[re: youngsyp] [link to this post]
 
What does your Bit Loading graph look like now?

Can you post another link - and to save searching back, links to the previous versions too.


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M H C


taurus excreta cerebrum vincit
Standard User youngsyp
(member) Thu 11-Jan-18 13:58:03
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Re: Drop in upstream sync


[re: MHC] [link to this post]
 
No worries.

Here's the pbParams:

xdslctl info --pbParams
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 9875 Kbps, Downstream rate = 59966 Kbps
Bearer: 0, Upstream rate = 9875 Kbps, Downstream rate = 55000 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2160)
DS: (33,859) (1216,1961) (2793,3875)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 9875 kbps 59966 kbps
Actual Aggregate Tx Power: 3.8 dBm 12.8 dBm

Bitloading 030118
Bitloading 040118
Bitloading 110118

Paul

ISP: IDNet
Service: FTTC Unlimited (55/10)
Exchange: EMSILVE
Cabinet: 4
DSLAM: Huawei
Modem/ router: Billion BiPAC 8800AXL
Attenuation: 21.7
Target SNRM:
Current sync: 55000/ 9826
G.INP: Enabled
Standard User MHC
(sensei) Thu 11-Jan-18 14:05:13
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Re: Drop in upstream sync


[re: youngsyp] [link to this post]
 
U2 still looks a little low, I would have expected the low end of U2 to be at maybe 4 bits/tone dropping to 3, 2, 1 at the high end.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

M H C


taurus excreta cerebrum vincit


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Standard User youngsyp
(member) Fri 12-Jan-18 13:56:44
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Re: Drop in upstream sync


[re: MHC] [link to this post]
 
I couldn't offer any comment on that as it's a little beyond my understanding I'm afraid. I will say the line is performing well again though and is as stable as ever. Every time I re-sync, the US sync seems to improve too. So I'll leave it alone now and fingers crossed it'll get back to it's best of 9999 kb/s actual and 10xxx kb/s attainable.

Paul

ISP: IDNet
Service: FTTC Unlimited (55/10)
Exchange: EMSILVE
Cabinet: 4
DSLAM: Huawei
Modem/ router: Billion BiPAC 8800AXL
Attenuation: 21.7
Target SNRM:
Current sync: 55000/ 9826
G.INP: Enabled
Standard User MHC
(sensei) Fri 12-Jan-18 15:10:27
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Re: Drop in upstream sync


[re: youngsyp] [link to this post]
 
Just re-sync once a day and if you can, get another screen shot of bitloading - interesting to see if U2 improves.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

M H C


taurus excreta cerebrum vincit
Standard User j0hn83
(committed) Fri 12-Jan-18 21:00:30
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Re: Drop in upstream sync


[re: MHC] [link to this post]
 
My bitloading is almost identical.
https://ibb.co/hPJomm

Hlog cuts off about the same tones.
https://ibb.co/bDhymm

My entire line to the cabinet is only about 5 years old.
I think it's just a result of being so far from the cabinet, and so far from the exchange.
Standard User youngsyp
(member) Tue 16-Jan-18 13:28:05
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Re: Drop in upstream sync


[re: MHC] [link to this post]
 
Just reset and I've lost ~ 100kb/s (wow!!) on the upstream but I'm putting that down to the time of day. I also unchecked the PhyR on the upstream as it didn't seem to do anything (checked it before the last re-sync). Probably just coincidence...

Anyway, these are the pbPrams:

xdslctl info --pbParams
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 9781 Kbps, Downstream rate = 59622 Kbps
Bearer: 0, Upstream rate = 9781 Kbps, Downstream rate = 55000 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2178)
DS: (33,859) (1216,1961) (2793,3949)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 9781 kbps 59622 kbps
Actual Aggregate Tx Power: 4.1 dBm 12.7 dBm

And this is the bitloading chart.

A slight difference but don't know about improvement.

ETA: latency is looking good. I just pinged the BBC and it's coming back at 10ms.

The Billion doesn't seem to like it when I change a WAN > DSL setting and re-sync. I have to toggle 'Block WAN PING' to get BQM working again every time.

Paul

ISP: IDNet
Service: FTTC Unlimited (55/10)
Exchange: EMSILVE
Cabinet: 4
DSLAM: Huawei
Modem/ router: Billion BiPAC 8800AXL
Attenuation: 21.7
Current sync: 55000/ 9875
G.INP: Enabled

Edited by youngsyp (Tue 16-Jan-18 13:33:42)

Standard User youngsyp
(member) Wed 17-Jan-18 09:20:40
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Re: Drop in upstream sync


[re: youngsyp] [link to this post]
 
After this mornings re-sync, which coincidentally was triggered (by me) at the very shortly before the gateway restarted.

pbParams:

xdslctl info --pbParams
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 9807 Kbps, Downstream rate = 60066 Kbps
Bearer: 0, Upstream rate = 9807 Kbps, Downstream rate = 55000 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2148)
DS: (33,859) (1216,1961) (2793,3847)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 9807 kbps 60066 kbps
Actual Aggregate Tx Power: 3.7 dBm 12.8 dBm

And bitloading chart.

SNRM seems to be at it's highest in the morning (the opposite of what it was with ADSL), so I'll re-sync early to try and bring the US sync back up again.

Paul

ISP: IDNet
Service: FTTC Unlimited (55/10)
Exchange: EMSILVE
Cabinet: 4
DSLAM: Huawei
Modem/ router: Billion BiPAC 8800AXL
Attenuation: 21.7
Current sync: 55000/ 9875
G.INP: Enabled
Standard User j0hn83
(committed) Thu 18-Jan-18 13:53:36
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Re: Drop in upstream sync


[re: youngsyp] [link to this post]
 
In reply to a post by youngsyp:
I also unchecked the PhyR on the upstream as it didn't seem to do anything (checked it before the last re-sync). Probably just coincidence...
PhyR does indeed have no effect, checked or unchecked.
It's Broadcoms own proprietary version of G.INP/retx and Is not used on FTTC/VDSL2 in the U.K.
The same goes for SRA, which isn't used by Openreach.
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