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[beardedwonder]

Hi,

I've recently had some problems with my 80/20 Plusnet FTTC connection. I have been using an unlocked HG612, with G.INP enabled my speeds were 74Mbps/15Mbps. A fault developed in the copper joints between the modem and the cabinet according to Plusnet, Openreach have now fixed the issue leaving me with the following stats:

modem info:
V100R001C01B030SP08
A2pv6C038m.d24j

Code: [Select]

DSLAM/MSAN type:                BDCM:0xa44f / v0xa44f
Modem/router firmware:          AnnexA version - A2pv6C038m.d24j
DSL mode:                       VDSL2 Profile 17a
Status:                         ShowtimeUptime:                         11 hours 44 min 53 sec
Resyncs:                        0 (since 27 Jul 2015 21:48:19)                       
                                Downstream      UpstreamLine
attenuation (dB):                 19.1            0.0
Signal attenuation (dB):        Not monitored           
Connection speed (kbps):        8607            5446
SNR margin (dB):                32.0            10.0
Power (dBm):                    12.6            7.4
Interleave depth:               151             1
INP:                            3.00            0
G.INP:                          Not enabled             
RSCorr/RS (%):                  0.0005          0.0956
RSUnCorr/RS (%):                0.0027          0.0000
ES/hour:                        0               0

Code: [Select]

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status:   0
Max:    Upstream rate = 6366 Kbps, Downstream rate = 24232 Kbps
Bearer: 0, Upstream rate = 5446 Kbps, Downstream rate = 8607 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):        32.0            10.0
Attn(dB):        19.1            0.0
Pwr(dBm):        12.6            7.4
After plugging in my ECI modem, the BT speedtest shows:

Download = 48.82Mbps, Profile = 56.1Mbps
Upload = 12.98Mbps, Profile = 20Mbps

[beardedwonder]

Decided to go back to the HG612, interleaving seems enormous and for some reason G.INP is disabled but the speeds are much closer to what I had before the problems. Can swapping the modem reset settings somewhere? Is there any way I can get G.INP back?

Code: [Select]

DSLAM/MSAN type:        BDCM:0xa44f / v0xa44f
Modem/router firmware:  AnnexA version - A2pv6C038m.d24j
DSL mode:                VDSL2 Profile 17a
Status:                  Showtime
Uptime:                  29 min 1 sec
Resyncs:                1 (since 28 Jul 2015 12:20:08)

Downstream Upstream
Line attenuation (dB):  18.6 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 65277 16139
SNR margin (dB):        6.1 5.8
Power (dBm):            13.5 7.4
Interleave depth:        1277 1
INP:                    3.00 0
G.INP:                  Not enabled

RSCorr/RS (%):          0.5071 0.0006
RSUnCorr/RS (%):        0.0000 0.0000
ES/hour:                0 0

Code: [Select]

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 16042 Kbps, Downstream rate = 74788 Kbps
Bearer: 0, Upstream rate = 16139 Kbps, Downstream rate = 65277 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): 6.1 5.8
Attn(dB): 18.6 0.0
Pwr(dBm): 13.5 7.4

[roseway]

Swapping the modem won't reset the connection. At a guess, bebooting the HG612 instead of swapping to the ECI would have achieved the same result. It looks as though there was some temporary line condition which resulted in the previous low speeds with the HG612. You can see that it had a very high downstream SNR margin, which means that whatever condition existed when it connected had since gone away.

You are connected to a Huawei cabinet, so G.Inp should be applied quite soon. There's no way to hurry that along.

[beardedwonder]

Swapping the modem won't reset the connection. At a guess, bebooting the HG612 instead of swapping to the ECI would have achieved the same result. It looks as though there was some temporary line condition which resulted in the previous low speeds with the HG612. You can see that it had a very high downstream SNR margin, which means that whatever condition existed when it connected had since gone away.

You are connected to a Huawei cabinet, so G.Inp should be applied quite soon. There's no way to hurry that along.

I had rebooted the HG612 multiple times over a number of days, it was only after swapping to the ECI that something changed. I guess it was just a coincidence, will the interleaving drop down if I leave the connection alone? An Openreach engineer is booked in for Friday, is there anything that they will be able to do?

[burakkucat]

If there was a physical problem with a joint in the D-side cabling, then once it had been fixed a circuit recalc (reset) would be justified. If it was a network engineer (telephony) who fixed the fault, then it is likely that a recalc has not yet been done. If the engineer booked to attend this Friday is multi-skilled, s/he could arrange for the circuit recalc . . . assuming s/he has access to the notes that relate to the joint repair.