Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: Sheepie on February 06, 2019, 05:53:28 PM
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Not sure if this has been noticed or mentioned before but my line reset yesterday and synced back up 15Mb higher on the downstream so I thought I would see if I can find out why. It turns out that the DSLAM firmware was changed and I am now able to use the 3db profile. The connection was down for 20mins while the firmware was changed.
Tuesday:
DSLAM/MSAN type: BDCM:0xa48c / v0xa48c
Modem/router firmware: AnnexA version - A2pv6C038m.d24j
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 69 days 4 hours 49 min 3 sec
Resyncs: 0 (since 11 Jan 2019 14:06:19)
Today:
DSLAM/MSAN type: BDCM:0xb12d / v0xb12d
Modem/router firmware: AnnexA version - A2pv6C038m.d24j
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 11 hours 37 min 8 sec
Resyncs: 1 (since 11 Jan 2019 14:06:19)
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Has been seen before.
https://forum.kitz.co.uk/index.php?topic=20413.0
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It turns out that the DSLAM firmware was changed and I am now able to use the 3db profile. The connection was down for 20mins while the firmware was changed.
Confused by the bit i put in bold.
There is no need for a firmware update for 3dB SNRM targets.
I was on a 3dB SNRM target on the 0xa48c firmware and remained on it after the DSLAM updated to 0xb12d
If it happened yesterday then it wouldn't be possible for the line to be on a 3dB SNRM target already.
The SNRM target moves in 1dB increments, and leaves at least 2 days between changes.
What is more likely is the DSLAM has rebooted due to the firmware update and resynced at 6dB before some crosstalkers.
This increased your sync by 15Mb.
Then those crosstalkers connected and your SNRM dropped to nearer 3dB.
If your attainable is still the same as before then the line is still at 6dB.
If i recall correctly you had 2 lines and 1 had no G.INP.
Is that still the case?
DLM won't apply a 3dB SNRM without G.INP.
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ok so the 3db does look like it might be down to the fact the cab got rebooted and I synced up before many crosstalkers.
I do have 2 lines, and both had firmware changed at the same time (obviously). What is odd is the max attainable on one of them which has jumped (line2).
Line 1 (which has G.INP enabled):
Before - Max: Upstream rate = 22806 Kbps, Downstream rate = 69544 Kbps
After - Max: Upstream rate = 25207 Kbps, Downstream rate = 69000 Kbps
Line 2 (no G.INP, and no interleave):
Before - Max: Upstream rate = 25040 Kbps, Downstream rate = 64550 Kbps
After - Max: Upstream rate = 25542 Kbps, Downstream rate = 75400 Kbps
Anyone know what the differemces are in the frimware/cards? I hope it's not increased the capacity in the cab - more crosstalk :(
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I believe my firmware upgraded when they added the 64 port line cards (HD expansion on the cabinet).
Check if your FTTC cabinet has grown. The bigger cabinets get a couple inches wider on the right.
The smaller Huawei cabinets get a considerably bigger extension also on the right of the cabinet.
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Checked out the street cab, and yes there is an extra 10cm or so been added to the right side.
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There has been another firmware change at my DSLAM, which for some reason has resulted in my Max Downstream going from 66010 to 82168 Kbps:
Max: Upstream rate = 24296 Kbps, Downstream rate = 63728 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 66010 Kbps
to
Max: Upstream rate = 28892 Kbps, Downstream rate = 82168 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 79987 Kbps
The new firmware is
DSLAM/MSAN type: BDCM:0xc01c / v0xc01c
Modem/router firmware: AnnexA version - A2pv6C038m.d24j
DSL mode: VDSL2 Profile 17a
Everything else appears to be the same (Fastpath, no GINP, no Vectoring).
Anyone else seen this firmware?
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I've also had an update on my cabinet on 8th January starting at 01:27, according to the stats it took about 10 minutes to apply.
Before:
DSLAM type / SW version: BDCM:0xa48c (164.140) / v0xa48c
After:
DSLAM type / SW version: BDCM:0xa49a (164.154) / v0xa49a
My stats are effectively the same, only that my crosstalker is home and modem on so I lost 5Mb of sync as her modem clearly got in before mine, sigh.
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Mine is @ BDCM:0xa4a1 (164.161) / v0xa4a1, hasn't changed recently
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Whistles in ECI. :'(
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Firmware won't help with crosstalk though - the lines will drop back to their usual speed shortly (and further if you've got more crosstalkers to play with)