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Author Topic: New NTE/Mk4 frontplate to be launched  (Read 18882 times)

gt94sss2

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New NTE/Mk4 frontplate to be launched
« on: January 04, 2016, 12:47:15 PM »

OR are releasing a new range of master sockets known as the NTE5C range including a new VDSL Mark 4 frontplate

I gather the new range uses the same backplate but is otherwise incompatable with the existing sockets as its a new tool less design.

Will be interesting if those on the boards in a position to do so are able to compare how the new design compares to the older ones (and specifically how it performs vs the other VDSL faceplates)


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Weaver

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Re: New NTE/Mk4 frontplate to be launched
« Reply #1 on: January 04, 2016, 12:50:20 PM »

Weaver drools.

Sadly no need to play with lovely SSFPs any more as I have no phones, so I have a straight through plate going directly into the test socket. I'm a big microfilter fan though. I just love them.  Totally illogical.
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Weaver

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Re: New NTE/Mk4 frontplate to be launched
« Reply #2 on: February 05, 2016, 04:28:10 PM »

I say totally illogical, but maybe that isn't quite so. If there's no detrimental effect in signal quality I seem to to remember reading somewhere (Bald_Eagle?) about lightning strikes where on more than one occasion the SSFP took one for queen and country, the ultimate sacrifice, and the modem survived.

Maybe SSFPs still have their place.

In fact, I wonder if really old SSFP designs might have their merits for very long line users - I got a serious ticking off with B*Cat with claws out for saying this, so need to be careful :'( - because they might be more narrow-band and thus ideal where the higher DSL bins aren't even in use, whereas later BT hardware is designed to accommodate VDSL2 frequencies.
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Weaver

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Re: New NTE/Mk4 frontplate to be launched
« Reply #3 on: February 05, 2016, 04:31:59 PM »

I would like to know a bit more about the surge protection / suicide possibilities of the new hardware when used with ADSL.
« Last Edit: February 05, 2016, 04:34:05 PM by Weaver »
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William Grimsley

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Re: New NTE/Mk4 frontplate to be launched
« Reply #4 on: February 05, 2016, 04:44:50 PM »

Is there a possibility that this will give VDSL users with the MK3 SSFP any increase in speed/stability?
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Bald_Eagle1

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Re: New NTE/Mk4 frontplate to be launched
« Reply #5 on: February 05, 2016, 05:37:33 PM »

I say totally illogical, but maybe that isn't quite so. If there's no detrimental effect in signal quality I seem to to remember reading somewhere (Bald_Eagle?) about lightning strikes where on more than one occasion the SSFP took one for queen and country, the ultimate sacrifice, and the modem survived.



Yes. Your memory is correct.

I'm currently on a Mk 2 SSFP.

When my SSFP was initially switched from a Mk1 to a Mk 2 a very long time ago, I did notice a little speed reduction, but slightly improved stability/reduced error counts.

From what I have read, the Mk3 SSFP has improved filtering, but potentially at the expense of a little bit of speed.
For users achieving high speeds say the full 80 Mbps on a VDSL2 connection, a reduction of 8 Mbps (10%) is probably negligible.

However, the same 8 Mbps reduction for a 22 Mbps connection like mine would be very noticeable indeed & would equate to approximately 36%.

However, I'd still prefer the SSFP to sacrificially cope with lightning effects etc. rather than the modem or even the PC.


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Black Sheep

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Re: New NTE/Mk4 frontplate to be launched
« Reply #6 on: February 05, 2016, 06:46:39 PM »

Just a side note on the effects of lightning ............

Lightning is a cause of electrical surges in the network which occur as a result of either direct strikes to line plant or induction into lines in the vicinity of lightning activity. Any strike within 50 metres of an object is regarded as a direct strike. Strikes from 50 and up to 200 metres are regarded as proximity strikes giving rise to induced surges. With the protection methods described in the Lightning Protection Handbook (An OR  internal document),  the effects of induced surges can usually be nullified.

Direct strikes, however, are much more damaging and it would not be economical to attempt to prevent damage from occurring to the network under these conditions, fortunately direct strikes occur much less frequently than proximity strikes.
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npr

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Re: New NTE/Mk4 frontplate to be launched
« Reply #7 on: February 08, 2016, 07:05:41 PM »

On my long aluminium line, the Mk2 faceplate gives me better upstream sync and only slightly slower downstream.

Typical stats:

Quote
Mk 3 Faceplate

VDSL Port Details       Upstream         Downstream
               Line Rate:      1.341 Mbps       23.748 Mbps
    Actual Net Data Rate:      1.322 Mbps       23.699 Mbps
          Trellis Coding:         ON                ON
              SNR Margin:        6.2 dB            6.3 dB
            Actual Delay:          0 ms              8 ms
          Transmit Power:        6.6 dBm          11.9 dBm
           Receive Power:       -6.2 dBm         -22.2 dBm
              Actual INP:        0.0 symbols       3.0 symbols
       Total Attenuation:       12.8 dB           34.1 dB
Attainable Net Data Rate:      1.385 Mbps       28.038 Mbps

Mk 2 Faceplate

    VDSL Port Details       Upstream         Downstream
               Line Rate:      1.645 Mbps       22.377 Mbps
    Actual Net Data Rate:      1.626 Mbps       22.330 Mbps
          Trellis Coding:         ON                ON
              SNR Margin:        6.3 dB            6.5 dB
            Actual Delay:          0 ms              8 ms
          Transmit Power:        6.4 dBm          11.3 dBm
           Receive Power:       -6.4 dBm         -22.4 dBm
              Actual INP:        0.0 symbols       3.0 symbols
       Total Attenuation:       12.9 dB           33.7 dB
Attainable Net Data Rate:      1.743 Mbps       27.514 Mbps

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Weaver

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Re: New NTE/Mk4 frontplate to be launched
« Reply #8 on: February 09, 2016, 05:11:32 AM »

Thanks for that, a very valuable test.

What happens if you repeat the test (careful to avoid angering DLM)? Just in case the reconnection itself was changing things slightly, as has happened for me.
« Last Edit: February 09, 2016, 05:16:48 AM by Weaver »
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npr

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Re: New NTE/Mk4 frontplate to be launched
« Reply #9 on: February 09, 2016, 12:58:40 PM »

The above result are a few months old, I did repeat the test a number of times and then retested again a few weeks later all with similar results.
My upstream is consistently faster with the Mk2 faceplate. I'm guessing it's allowing a stronger signal in the lower frequency US0 band, where most of my upstream bandwidth resides, whereas the Mk3 faceplate may give better results at higher frequencies at the expense of the US0 band.

Line >900 metre of mostly aluminium.
Router: Zyxel VMG8924-B10A

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gazaai

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Re: New NTE/Mk4 frontplate to be launched
« Reply #10 on: April 05, 2016, 09:46:59 PM »

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burakkucat

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Re: New NTE/Mk4 frontplate to be launched
« Reply #11 on: April 05, 2016, 10:59:36 PM »

I see that the concept of the "bell wire" still persists!  :-X

I would need to handle one of the units before I could form any opinion.
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Tricky

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Re: New NTE/Mk4 frontplate to be launched
« Reply #12 on: April 06, 2016, 12:47:59 AM »

 :(

This is going to complicate my ODC tests I go through with customers.

I'm all for simplification, but a heads up would have been nice.
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ejs

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Re: New NTE/Mk4 frontplate to be launched
« Reply #13 on: April 06, 2016, 04:19:33 PM »

That new PDF, like the instructions with the NTE5a, claim that the blue/white striped wiring colours is the older version, but I thought that the four solid colour wires (blue, brown, orange and green) is the worse kind because that's not twisted pair?
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burakkucat

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Re: New NTE/Mk4 frontplate to be launched
« Reply #14 on: April 06, 2016, 06:50:01 PM »

The solid blue wire and the solid orange wire make up the first twisted pair, whilst the solid green and the solid brown wire make up the second twisted pair.

It isn't helped that the same coloured wires were used in CW1308 specification internal cabling prior to the striped variant that is now the current "old" cabling.

I tried to explain the situation on a page in the Kitz wiki back in 2012.  :)
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