Can having 2 ADSL/VDSL pairs on the same 2 pair cable affect the speed of both connections?

Forums › New Zealand Broadband › Can having 2 ADSL/VDSL pairs on the same 2 pair cable affect the speed of both connections?

someplaceelse

3 posts

Wannabe Geek

#126975 25-Jul-2013 16:24

I want to get two lines connected to a house. One with phone and ADSL2 and another with naked ADSL or VDSL.

A Chorus technician I talked to a couple of days ago said that he has seen situations where having two ADSL connections on the same cable can have a dramatic impact on the sync rates of both lines. I've seen no mention of these problems in the forum. Can anyone confirm this?

myfullflavour

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Full Flavour

#866003 25-Jul-2013 16:28

I'm not a technician, so don't take my word as gospel...

But we've got plenty of customers who do this fine.

coffeebaron

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#866011 25-Jul-2013 16:38

In theory yes, but in practice no. There will be more effect from the sum total of other DSL connections in your cable wrapper. Possibly if your are at the end of DSL range on a long lead in copper, then you may see a marginal difference there.

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someplaceelse

3 posts

Wannabe Geek

#866016 25-Jul-2013 16:42

A few more details in case they are relevant.

The house is ~1.1km from cabinet. Currently getting 12.5Mbps down. Not sure of the attenuation sorry.

Cbfd

307 posts

Ultimate Geek

#866036 25-Jul-2013 17:22

If you run adsl + vdsl down the same 049 the vdsl has a big loss of speed

There has been a few times recently with 2 many vdsl isers close together in the cable pairs giving big reduction in speed

sbiddle

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#866212 25-Jul-2013 22:05

In theory? Yes it's possible if it's non twisted pair cable.

In the real world? Unlikely, as your DSL signal has already travelled in multi pair MPF's to get to your premises, so a 50pr cable for example serving your street will already have multiple xDSL lines in it.

insane

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#866273 26-Jul-2013 00:07

I used to have a similar setup, DSL and VDSL at the same house, however they came down from the telephone pole using two different drop lines. Unsurprisingly the addition of VDSL had no impact on the DSL, got 34mbps and 16mbps respectively.

Had more issues with two wireless networks and 2.4ghz cordless phones!

Having said that, a customer of ours has two VDSL connections in one office, one is on DLM1 and the other simply will not get better than DLM2, so that translates into a difference of latency between the two.