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Author Topic: MK4 faceplate frequent disconnects, XF-1e seems good.  (Read 651 times)

adam

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MK4 faceplate frequent disconnects, XF-1e seems good.
« on: June 13, 2019, 10:36:37 PM »

Some context, recently had vdsl activated at new (1960s) property. Probably about 800M away from the cabinet. The disconnects were so bad that DLM lowered my profile to a point where I dipped below the minimum guaranteed sync and I called my provider Vodafone who arranged an openreach engineer to come out. I wasn't there when he visited, but apparently he found a fault and replaced some cable possibly between some manholes between my and my neighbours property.

'Someone I know' also replaced the old oval shaped block terminal from the incoming cable and the master socket to a 2019 BT Openreach Telephone Master Socket NTE5c MK2 & VDSL/ADSL Faceplate MK4 which I purchased from eBay. This was installed before vdsl was activated.

So using the new NTE5c and MK4 Faceplate, the Vodafone router syncs reasonably well, but disconnects ~every hour or so. Unclipping the Faceplate and using an ADSL Nation XF-1e dongle style filter in the NTE5c, the disconnects seem to stop completely.

Could the Mk4 be faulty, or perhaps the XF-1e is coping better with my line conditions? My stats are (with the XF-1e):

VDSL   G.993.5 (VDSL)
Link type   Interleaved path

                         Downstream   Upstream
Actual data rate   37645 (Kbps.)   8248 (Kbps.)

                                Downstream   Upstream
SNR Margin           6.6 dB           6 dB
Loop Attenuation   24 dB           21.6 dB

Indicator name   Downstream   Upstream
FEC Corrections   39                   580771
CRC Error           49                   2

PPP session uptime   14 hours and 32 minutes

Thoughts?
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burakkucat

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Re: MK4 faceplate frequent disconnects, XF-1e seems good.
« Reply #1 on: June 13, 2019, 11:12:29 PM »

The actual electronics of a Mk 3 and of a Mk 4 SSFP are identical. The problem comes with the clip-on presentation of the Mk 4 SSFP and the NTE5C behind it.  :-X

If the NTE5C plus Mk 4 SSFP was replaced with an NTE5/A and a Mk 3 SSFP then I strongly suspect that your problems would cease.
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displaced

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Re: MK4 faceplate frequent disconnects, XF-1e seems good.
« Reply #2 on: June 14, 2019, 12:04:52 AM »

Iíd try another modem if youíre using the supplied Vodafone unit.

My ~600m line ran for 4 years absolutely fine when I was on BT Infinity with an Openreach HG612 modem.  As soon as I switched to Vodafone, the line was barely up for an hour between resyncs.

I ended up banded before switching back to the HG612 - I got a DLM reset done and Iíve been back to normal for the past 2 years or so.
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Vodafone Landline+FTTC: Huawei DSLAM, HG612 modem, pfSense router, Ubiquiti access points. GigE home LAN with Netgear ProSafe switches. Mac, FreeBSD and Win10.

adam

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Re: MK4 faceplate frequent disconnects, XF-1e seems good.
« Reply #3 on: July 08, 2019, 11:03:48 PM »

The actual electronics of a Mk 3 and of a Mk 4 SSFP are identical. The problem comes with the clip-on presentation of the Mk 4 SSFP and the NTE5C behind it.  :-X

If the NTE5C plus Mk 4 SSFP was replaced with an NTE5/A and a Mk 3 SSFP then I strongly suspect that your problems would cease.

Thanks, I'll consider the Mk3, if I can source one.

Iíd try another modem if youíre using the supplied Vodafone unit.

My ~600m line ran for 4 years absolutely fine when I was on BT Infinity with an Openreach HG612 modem.  As soon as I switched to Vodafone, the line was barely up for an hour between resyncs.

I ended up banded before switching back to the HG612 - I got a DLM reset done and Iíve been back to normal for the past 2 years or so.

Unfortunately I don't have another modem, I guess as it performed (in my opinion) very well at the previous property <100m copper, I hadn't considered it, although the extra stats would be useful.

I'm not sure if I became banded? when I had to power off for some electrical work, the downstream SNR margin is now ~7.9 / sync speed is 33480, changed from 6.6 / sync speed 37645

However, I have now been in sync for 18 days

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Weaver

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Re: MK4 faceplate frequent disconnects, XF-1e seems good.
« Reply #4 on: July 09, 2019, 11:47:39 PM »

Found these on eBay
  * back of master socket - NTE5a and
  * mk3 SSFP frontplate

and there are lots more alike too. These arenít necessarily the best deals available and I havenít checked the sellers out, so usual caveat
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