What differences in sync speeds and reliablity on VDSL modems

Forums › New Zealand Broadband › What differences in sync speeds and reliablity on VDSL modems - particularly Netcomm gear?

davidgo2

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#293663 6-Feb-2022 12:38

I am looking to buy a backup VDSL modem (I have an NF4V which works well). I am using this in bridged mode, so I really only care about sync speed and reliability. As its a backup, I want to pick up something off Trademe or similar for peanuts. (My ISP jumps to "is the modem not working properly" as the first question when there was a recent fault. It turned out that my spare stopped working... In this case, however, it was a line fault).

If its relevant, I believe I am between 1.1 and 1.3km from the exchange, and I get sync speeds of about 50mb down and 10mb up on profile 17a.

It seems that the NF4V has been replaced by a number of other modems like the NF10WV, NF18ACV and no doubt others as well. Are these modems likely to perform as well as the NF4V with respect of sync? Are there

Relatedly does anyone know how the HG659 Vodafone branded modems perform and if I can use them with ISP's other then Vodafone?

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Kiwifruta

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#2862498 6-Feb-2022 12:48

I know the NF18s are superior to the NF10s and NF15s.

The Draytek Vigor 130s in bridge mode were really popular with GZers on VDSL a while back.

nztim

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#2862563 6-Feb-2022 15:50

NF Will give you a higher sync than the DV130 where as the DV130 will be more stable

Any views expressed on these forums are my own and don't necessarily reflect those of my employer.

raytaylor

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#2862703 6-Feb-2022 17:49

NF10s and NF15s.

Yep those two are junk.

We had about a 50% return rate with the NF15ACV's

Ray Taylor

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nztim

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#2862778 6-Feb-2022 18:57

raytaylor:
NF10s and NF15s.

Yep those two are junk.

We had about a 50% return rate with the NF15ACV's

Aren't they also only 100mbit?

Any views expressed on these forums are my own and don't necessarily reflect those of my employer.

atomeara

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#2862801 6-Feb-2022 20:36

We use the Draytek Vigor 130 in bridge mode.

The tend to replace the power supplies they come with new "medical grade" ones as we have had issues in a few places where the factory default themselves when the power does funny things with the factory PSU.

Pretty bullet proof but we have had the odd one cook itself (prob a spike from the line)

We are seeing less customers with DSL these days as UFB is reaching most areas. We have also stop offering DSL in UFB / SFA (Specified fibre areas) as a backup with copper withdrawal rolling along now.

hamish225

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#2862934 7-Feb-2022 11:24

I've heard good things about fritz boxes See if you can get a pre loved 2 degrees one off trademe!

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geekm

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#2863014 7-Feb-2022 13:28

Personally using the NF18V now as wanted to upgrade the NF4V and finding performance on VDSL pretty much the same.

Connection type:PTM

Connection Uptime:42D 1H 42M 50S

Line rate - upstream:1119

Line rate - downstream:18568

Mode: VDSL2

Traffic Type: PTM

Status: Up

Link Power State: L0

Downstream Upstream

Line Coding(Trellis): On On

SNR Margin (0.1 dB): 57 68

Attenuation (0.1 dB): 344 0

Output Power (0.1 dBm): 144 104

Attainable Rate (Kbps): 18654 1119

Now before anyone chimes in that I should be getting better speeds I'll explain.

My line wire lenght is 2.5km from the ISAM Cabinet. ISAM has Vectoring line cards.

Copper line is 0.63 all the way so hence the higher sync over 0.4 or 0.5 over same line length.

I was the Chorus IP/OP Fault technician for 11 years in this area so know what is what regarding the physical layer.

Go with the NF18V as your back up or another NF4V.

Either of these are the fastest and most stable sync on DSL I found over the years. I tried every modem out there when I was Diagnosing and Resolving DSL faults and these gave the best sync rates.

Forget the Draytek. In my test it would give 3-4 Mbps less sync on DL than the Netcomms.

nztim

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#2864308 9-Feb-2022 19:16

geekm: Forget the Draytek. In my test it would give 3-4 Mbps less sync on DL than the Netcomms.

Totally Echo This here is stats on a 1900M line (draytek vs NF4V)

Draytek DV130

DIAGNOSIS PARAMETERS
ACTUAL BITRATE
DOWNSTREAM 16.332 Mb/s
UPSTREAM 1.107 Mb/s
ACTUAL PSD
DOWNSTREAM -50.3 dBm/Hz
UPSTREAM -37.9 dBm/Hz
USER TRAFFIC
DOWNSTREAM Detected
UPSTREAM Detected
ATTAINABLE BITRATE
DOWNSTREAM 16.23 Mb/s
UPSTREAM 1.106 Mb/s
ATTENUATION
DOWNSTREAM 28.8 dB
UPSTREAM 12.2 dB
NOISE MARGIN
DOWNSTREAM 5.8 dB
UPSTREAM 6.9 dB
OUTPUT POWER
DOWNSTREAM 14.0 dBm
UPSTREAM 12.5 dBm
RELATIVE CAPACITY OCCUPATION
DOWNSTREAM 100.0 %
UPSTREAM 98.0 %
LOOP ATTENUATION
DOWNSTREAM 35.0 dB
UPSTREAM 12.2 dB
IMPULSE NOISE PROTECTION
DOWNSTREAM - Symbols
UPSTREAM - Symbols
INTER LEAVING DELAY
DOWNSTREAM - ms
UPSTREAM - ms
ACTUAL RETRANSMISSION MODE
DOWNSTREAM rtx.mode.in.use
UPSTREAM rtx.mode.in.use

Netcomm NF4V

DIAGNOSIS PARAMETERS
ACTUAL BITRATE
DOWNSTREAM 19.302 Mb/s
UPSTREAM 1.186 Mb/s
ACTUAL PSD
DOWNSTREAM -49.9 dBm/Hz
UPSTREAM -40.0 dBm/Hz
USER TRAFFIC
DOWNSTREAM Detected
UPSTREAM Detected
ATTAINABLE BITRATE
DOWNSTREAM 19.778 Mb/s
UPSTREAM 1.185 Mb/s
ATTENUATION
DOWNSTREAM 29.8 dB
UPSTREAM 12.3 dB
NOISE MARGIN
DOWNSTREAM 6.2 dB
UPSTREAM 6.9 dB
OUTPUT POWER
DOWNSTREAM 14.5 dBm
UPSTREAM 10.4 dBm
RELATIVE CAPACITY OCCUPATION
DOWNSTREAM 99.0 %
UPSTREAM 99.0 %
LOOP ATTENUATION
DOWNSTREAM 29.5 dB
UPSTREAM 12.3 dB
IMPULSE NOISE PROTECTION
DOWNSTREAM - Symbols
UPSTREAM - Symbols
INTER LEAVING DELAY
DOWNSTREAM - ms
UPSTREAM - ms
ACTUAL RETRANSMISSION MODE
DOWNSTREAM rtx.mode.in.use
UPSTREAM rtx.mode.in.use

Interestingly the Line attenuation is 0.7db higher on the NF4V but the sync is 3mbps higher

Any views expressed on these forums are my own and don't necessarily reflect those of my employer.