Broadband Related > FTTC and FTTP Issues
Sync speed on new line
Zico:
I've recently had a new phone line and 80/20 FTTC service fitted (IDnet) and I am querying the FTTC sync speed of the line.
The DSL checker prediction stats (full snippet attached):
High Low High Low
VDSL Range A (Clean) 80 59.9 20 19 53.4 Available -- -- Yes --
VDSL Range B (Impacted) 77.6 54.1 20 16 40.3 Available -- -- Yes --
A few years ago I had PlusNet FTTC and synced at ~78/20 speeds back to the same ECI cabinet using an ECI Openreach modem / PlusNet Technicolor tg582n router combo. The predicted speed ranges were a reflection of what I had before (as far as I can recall) and were what I had expected on the new service (looking at the clean range for reasons below).
On the date of the phone line install, I provided the Openreach engineer a brand new 350m roll of 0.9mm BT Dropwire 12 - CW1406 spec. https://www.btcables.com/documents/CW1406-Dropwire-12.pdf. I had purchased this for two reasons; 1) our property is served by overhead power lines on the same telegraph poles and 2) the other drop wire serving the property has a few joints in it due to tree rub damage (and also runs to the opposite side of the property with another phone and FTTC service - running ~60/20).
The new line was installed from the property back to the DP pole at the edge of the road covering approx. ~125m. From the DP back to the cabinet is another ~180m (line traced using google maps - snippet attached) making an approx. line length of ~300m rounding up. Finally the fibre port was connected a few days after (was supposed to be a simultaneous provide but original engineer turned up was from MJ Quinn's and couldn't work with the overhead power lines - this was passed on by myself to IDnet in turn to Openreach).
Anyway, onto the connection stats. Full connection stats from DSLstats attached, snippet below:
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 11726 Kbps, Downstream rate = 56972 Kbps
Bearer: 0, Upstream rate = 12093 Kbps, Downstream rate = 56169 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 5.9 6.1
Attn(dB): 13.3 0.0
Pwr(dBm): 1.2 1.2
As you can see, I'm synced at the bottom end of the Impacted range for Download and below that for the Upload speed. This has surprised me based on the new spec drop wire cable and my historical connection through PlusNet (and even comparing my upload to the other FTTC service on the other drop wire syncing at 20 compared to my 12).
I'm not sure what to think as it shouldn't be a fault (at least on the line from the DP to the house), might be crosstalk with the other FTTC service (though again not on the last ~125m drop wire span) or even crosstalk back at the ECI cabinet with more connections over the last few years.
**Edit**
Re-uploaded DSLstats as file was empty, woops :)
[attachment deleted by admin]
Ixel:
Maybe it's just me but for your line attenuation I feel that the speed is lower than expected for sure. Based on your power levels I'd assume you're on a line card running version b206. Some ECI line cards have been known to run version d086 (like my first line is on b206, my second line is on d086) which for some gives improved speeds and for some others terrible speeds. My second line is significantly better than that first, I also had four SFI engineers working on the second line of which three of them did some pair swaps to find me the best pair along the route (and some lift and shifts). My attenuation is 16 dB downstream (450 meters approx to cabinet) and I'm getting an attainable rate of around 82/24 currently, but this line is connected to a line card running version d086 and is on an extremely good pair so isn't a really fair comparison I guess.
EDIT: Forgot to mention I'm running a DrayTek Vigor 2860Vac which has reed solomon coding 'R' on the downstream even on fastpath. This reduces the attainable rate. On a HG612 I think I recall getting something like 90/24.
Zico:
I'm using a Billion 8800NL R2 (was lazy and got it supplied from IDnet) and here are the stats confirming the DSLAM/MSAN:
Stats recorded 11 Dec 2017 16:23:36
DSLAM/MSAN type: IFTN:0xb206 / v0xb206
Modem/router firmware: AnnexA version - A2pvI042j1.d26q_rc1a
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 6 days 3 hours 15 min 20 sec
Resyncs: 0 (since 11 Dec 2017 10:59:33)
Downstream Upstream
Line attenuation (dB): 13.3 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 56169 12093
SNR margin (dB): 6.0 6.0
Power (dBm): 1.2 1.2
Interleave depth: 1 1
INP: 0 0
G.INP: Not enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)
RSCorr/RS (%): N/A 0.0002
RSUnCorr/RS (%): N/A 0.0000
ES/hour: 0.18 2.96
**Edit**
If it's the ECI line card firmware as the issue, how hard would it be to request this to be swapped to a d086 port if there is one available?
Dray:
I wonder if by supplying the drop wire, you have compromised the ability to call on Openreach?
Ixel:
--- Quote from: Zico on December 11, 2017, 04:25:26 PM ---I'm using a Billion 8800NL R2 (was lazy and got it supplied from IDnet) and here are the stats confirming the DSLAM/MSAN:
Stats recorded 11 Dec 2017 16:23:36
DSLAM/MSAN type: IFTN:0xb206 / v0xb206
Modem/router firmware: AnnexA version - A2pvI042j1.d26q_rc1a
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 6 days 3 hours 15 min 20 sec
Resyncs: 0 (since 11 Dec 2017 10:59:33)
Downstream Upstream
Line attenuation (dB): 13.3 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 56169 12093
SNR margin (dB): 6.0 6.0
Power (dBm): 1.2 1.2
Interleave depth: 1 1
INP: 0 0
G.INP: Not enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)
RSCorr/RS (%): N/A 0.0002
RSUnCorr/RS (%): N/A 0.0000
ES/hour: 0.18 2.96
**Edit**
If it's the ECI line card firmware as the issue, how hard would it be to request this to be swapped to a d086 port if there is one available?
--- End quote ---
I see. Pretty sure that Billion is good but best to wait to see what other forum members here say. While I highly doubt your problems are related to the line card version, it was merely an observation I had that for me d086 seems to perform better than b206. I believe b206 is far more common than d086 for some reason. There's no way to get this changed I'm afraid. More likely something else is causing you to have a lower than expected speed, heavy crosstalk, an underlying fault, well.. quite a few other possibilities I imagine. I'm sure someone else on here can be a bit more insightful than me :).
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