How much difference does a master splitter make ?

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Mark

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#175598 5-Jul-2015 18:33

Does anyone have any info on how much difference a master splitter makes to a VDSL connection ? (I keep seeing posts harping on about them) With numbers to back it up, like "this is the numbers without splitter, this is the numbers with splitter" ?

I've VDSL at home and just have the modem plugged in sans filter, for where I live I think I get great speeds but was wondering if there is anything else I could squeeze out of it :-)

Edit : Bah, copy n paste got wrecked, will try pictures :

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#1337405 5-Jul-2015 18:33

Hello... Our robot found some keywords in your post, so here is an automated reply with some important things to note regarding broadband speeds.

If you are posting regarding DSL speeds please check that

- you have reset your modem and router

- your PC (or other PCs in your LAN) is not downloading large files when you are testing

- you are not being throttled by your ISP due to going over the monthly cap

- your tests are always done on an ethernet connection to the router - do not use wireless for testing

- you read this topic and follow the instructions there.

Make sure you provide information for other users to help you. If you have not already done it, please EDIT your post and add this now:

- Your ISP and plan

- Type of connection (ADSL, ADSL2, VDSL)

- Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)

- Your general location (or street)

- If you are rural or urban

- If you know your connection is to an exchange, cabinet or conklin

- If your connection is to a ULL or wholesale service

- If you have done an isolation test as per the link above

Most of the problems with speed are likely to be related to internal wiring issues. Read this discussion to find out more about this. Your ISP is not intentionally slowing you down today (unless you are on a managed plan). Also if this is the school holidays it's likely you will notice slower than usual speed due to more users online.

A master splitter is required for VDSL2 and in most cases will improve speeds on DSL connections. Regular disconnections can be a monitored alarm or a set top box trying to connect. If there's an alarm connected to your line even if you don't have an alarm contract it may still try to connect so it's worth checking.

I recommend you read these two blog posts:

- Is your premises phone wiring impacting your broadband performance? (very technical)

- Are you receiving a substandard ULL ADSL2+ connection from your ISP?

I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.

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Item

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#1337426 5-Jul-2015 18:48

Interesting stats - mine are almost identical (my downstream attenuation is 12 not 11) but I am only getting 30Mb down with Snap.

Wonder why that would be?

I have a master splitter FWIW and newly installed cabling.

It seems I have fewer errors than you but this does't seem to result in better performance!

BarTender

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#1337438 5-Jul-2015 19:34

With a VDSL installation you shouldn't be using an inline filter. A professionally installed master filter which means you you can only use the VDSL modem in the dedicated outlet.

You should open a case with your ISP and say you need a master filter properly installed.

NonprayingMantis

6434 posts

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#1337439 5-Jul-2015 19:37

Without knowing the state of your exsiting wiring, but ts impossible to say how much difference a master splitter will make.
I've seen examples on this forum where it adds 10+Mbps, and other examples where it makes no noticeable difference.

Poor wiring is pretty common in NZ houses, so it's often a good option, but if you are getting decent speeds (which you definitely are - 40Mbps is very decent for vdsl) and are happy with the quality, then you probably don't need one.
The other thing to consider is that even if it adds, say, 10Mbps to your speed will you actually notice that in your day to day usage? Web browsing, YouTube, gaming etc will be basicallythe same at 50Mbps as it would be at 40Mbps.

pdath

252 posts

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#1337450 5-Jul-2015 19:45

That's like saying how much difference will it make if you have ADSL. You can't answer the question generally - but it is something you should have.

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Mark

1653 posts

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#1337468 5-Jul-2015 20:19

BarTender: With a VDSL installation you shouldn't be using an inline filter. A professionally installed master filter which means you you can only use the VDSL modem in the dedicated outlet.

You should open a case with your ISP and say you need a master filter properly installed.

Hmmm ... I thought the splitter/filter just prevented the xDSL from interfering with your phone line (which is why I was curious about the comments of having one improving speeds) ? I don't have a phone line (gone VOIP) so have the modem plugged straight into the socket, no splitter/filter at all.

Not the right approach ? Couldn't find much in Snaps website about the subject.

NonprayingMantis

6434 posts

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#1337472 5-Jul-2015 20:26

Mark:
BarTender: With a VDSL installation you shouldn't be using an inline filter. A professionally installed master filter which means you you can only use the VDSL modem in the dedicated outlet.

You should open a case with your ISP and say you need a master filter properly installed.

Hmmm ... I thought the splitter/filter just prevented the xDSL from interfering with your phone line (which is why I was curious about the comments of having one improving speeds) ? I don't have a phone line (gone VOIP) so have the modem plugged straight into the socket, no splitter/filter at all.

Not the right approach ? Couldn't find much in Snaps website about the subject.

So you are with snap and they didn't put a master filter in when you got connected?

How long have you had vdsl with them?

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sbiddle

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#1337473 5-Jul-2015 20:31

Mark:

Hmmm ... I thought the splitter/filter just prevented the xDSL from interfering with your phone line (which is why I was curious about the comments of having one improving speeds) ? I don't have a phone line (gone VOIP) so have the modem plugged straight into the socket, no splitter/filter at all.

The main purpose of the filter is to isolate internal wiring. Since most homes are wired in parallel each jackpoint past that causes reflections. You can't put a figure on it - it could be anything from no difference up to a 30Mbps + gain and will depend entirely on your wiring.

If you want a good run down read my pretty extensive blog post on the issue.

Mark

1653 posts

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#1337480 5-Jul-2015 20:41

NonprayingMantis:

So you are with snap and they didn't put a master filter in when you got connected?

How long have you had vdsl with them?

At this house I've been a customer for a year and half, been a customer before with them at the previous place but that was ADSL.

Mark

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#1337481 5-Jul-2015 20:44

sbiddle:
Mark:

Hmmm ... I thought the splitter/filter just prevented the xDSL from interfering with your phone line (which is why I was curious about the comments of having one improving speeds) ? I don't have a phone line (gone VOIP) so have the modem plugged straight into the socket, no splitter/filter at all.

The main purpose of the filter is to isolate internal wiring. Since most homes are wired in parallel each jackpoint past that causes reflections. You can't put a figure on it - it could be anything from no difference up to a 30Mbps + gain and will depend entirely on your wiring.

If you want a good run down read my pretty extensive blog post on the issue.

I'll go hunt the blog down.

Wiring here is Chorus -> house -> modem.
The other jack points in the house have an air gap between them and the main jack point ... I got it separated just in case I did get a filter put in, so the output of the filter would go to the phone jacks, or I could always plug the analog connection of the Fritz Box there so I can run some analog phones.

BarTender

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#1337500 5-Jul-2015 22:00

Mark: I'll go hunt the blog down.

Wiring here is Chorus -> house -> modem.
The other jack points in the house have an air gap between them and the main jack point ... I got it separated just in case I did get a filter put in, so the output of the filter would go to the phone jacks, or I could always plug the analog connection of the Fritz Box there so I can run some analog phones.

If you are on Snap and have a Naked connection ie without POTS Voice service then you don't *really* need a Master Filter. But you do need to isolate your internal wiring.

If each jackpoint is connected in a star configuration from the wiring coming into the house then you should disconnect all jackpoints apart from the one that you plug your modem into. This should be done back at where the wire comes into your house. If it's wired in a series then often running a new cable from where the cable comes into your house to the dedicated jackpoint will improve things.

The primary reason to have a master filter / splitter is to split the POTS Voice service from the DSL Service. If you don't have POTS then you just need to make sure you have a single direct cable from the street to the jackpoint you are using your modem in.. And you are done.

Behodar

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#1337502 5-Jul-2015 22:16

Mark: I'll go hunt the blog down.

http://www.geekzone.co.nz/sbiddle/8357

tangerz

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#1338101 6-Jul-2015 19:35

Mark:

Wiring here is Chorus -> house -> modem.
The other jack points in the house have an air gap between them and the main jack point ... I got it separated just in case I did get a filter put in, so the output of the filter would go to the phone jacks, or I could always plug the analog connection of the Fritz Box there so I can run some analog phones.

You've isolated the other internal wiring of the house by doing this so a master filter will probably have little/minimal effect.

zyo

513 posts

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#1338566 7-Jul-2015 14:37

Zero difference because I am on Fibre :)

Ok seriously when I was on VDSL it didn't make a whole lot of difference.

sidefx

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#1338574 7-Jul-2015 14:48

BarTender:
Mark: I'll go hunt the blog down.

Wiring here is Chorus -> house -> modem.
The other jack points in the house have an air gap between them and the main jack point ... I got it separated just in case I did get a filter put in, so the output of the filter would go to the phone jacks, or I could always plug the analog connection of the Fritz Box there so I can run some analog phones.

If each jackpoint is connected in a star configuration from the wiring coming into the house then you should disconnect all jackpoints apart from the one that you plug your modem into. This should be done back at where the wire comes into your house. If it's wired in a series then often running a new cable from where the cable comes into your house to the dedicated jackpoint will improve things.

The primary reason to have a master filter / splitter is to split the POTS Voice service from the DSL Service. If you don't have POTS then you just need to make sure you have a single direct cable from the street to the jackpoint you are using your modem in.. And you are done.

Pretty much this. You need to be sure that the incoming pair goes direct to your modem, with nothing else connected to that incoming pair. If you've done that a master filter will do very little for you.

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