Any merit to twisted pair phone cable?

[pctech]

Been having a few resynchs lately and I was wondering whether the phone cable could be picking up interference.

I've read that round twisted pair phone cable is better than the flat stuff but wondered if there's any truth to this?

[.Griff.]

For such a short length it makes negligible difference.

In fact I have 45cm Pro+ RJ11 from Adslnation and I noticed absolutely no difference at all.

It's currently sitting on my desk so if you want to test it out let me know and I'll gladly post it to you.

[pctech]

Question answered, cheers Griff.

[Lance]

The flat stuff is absolutely the worst cable to have. I've seen instances where even short runs <2m have introduced large amounts of noise to the line.

[Polchraine]

Been having a few resynchs lately and I was wondering whether the phone cable could be picking up interference.

I've read that round twisted pair phone cable is better than the flat stuff but wondered if there's any truth to this?

Twisted pair IS better than non-twisted.   You can get near flat twisted pair as well as round.   The near flat has each pair twisted together but the twisted-pairs are not twisted together.   

It may give you an improvement or may not, but it certainly will not make it worse.

[pctech]

I'll order some come pay day, its worth a punt I suppose.

[woppy101]

I'll order some come pay day, its worth a punt I suppose.

Where do you get it from ads nation doesn't have any of the 3m stuff in stock

[pctech]

I was looking at the 1m rather than 3m

[pctech]

I don't think the 3m is the same stuff

[woppy101]

I don't think the 3m is the same stuff

Where do you get the 1m stuff from

[pctech]

http://www.adslnation.com/phpapps/catalog/product_info.php?cPath=21&products_id=120

[woppy101]

How long does it take for stock to come in

[Polchraine]

http://www.adslnation.com/phpapps/catalog/product_info.php?cPath=21&products_id=120

Just get some Cat5e and two RJ11s and make your own!     Use two twisted pairs on 2&5 and 3&4 and ignore the others.

[pctech]

Last time I tried tinkering with cat5 cutters and crimpers I nearly had my fingers off. 

Joking aside such stuff isn't my specialty as I have fine motor control problems.

[Niall]

I'd be interested in people's experience with this. I'm planning on getting a new phone for my bedroom. As I don't have call monitoring on my line, I'm going to get a phone that does it for me, that doesn't need a power pack. You can get them for £24 so I might as well get that twisted pair cable too.

Are they shielded or not? I couldn't see any info on that, at a glance.

[.Griff.]

I'd be interested in people's experience with this. I'm planning on getting a new phone for my bedroom. As I don't have call monitoring on my line, I'm going to get a phone that does it for me, that doesn't need a power pack. You can get them for £24 so I might as well get that twisted pair cable too.

Are they shielded or not? I couldn't see any info on that, at a glance.

They are shielded yes.

[Polchraine]

I'd be interested in people's experience with this. I'm planning on getting a new phone for my bedroom. As I don't have call monitoring on my line, I'm going to get a phone that does it for me, that doesn't need a power pack. You can get them for £24 so I might as well get that twisted pair cable too.

Are they shielded or not? I couldn't see any info on that, at a glance.

But the shielding will do very little especially as the shielding is not earthed.

From experience - Flat untwisted is the worst,  flat shielded improves a little, then a big jump to twisted pair and finally twisted pair screened (but only just).   On my old ADSL2+ connection the difference from twisted pair to screened twisted pair was 1 or 2 kbps and sometimes the sync would be less so allowing for changes in sync each time the results were too small to be significant

[woppy101]

But the shielding will do very little especially as the shielding is not earthed.

From experience - Flat untwisted is the worst,  flat shielded improves a little, then a big jump to twisted pair and finally twisted pair screened (but only just).   On my old ADSL2+ connection the difference from twisted pair to screened twisted pair was 1 or 2 kbps and sometimes the sync would be less so allowing for changes in sync each time the results were too small to be significant

What was the difference between flat and twisted

[Polchraine]

What was the difference between flat and twisted

About 400k on a link running at 4800k ish. Some was at the top end and sorting some notches in the bit loading profile.

[pctech]

Just installed the new cable and rebooted the router.

No immediate difference in sync but I suspect that will come in time.

[Polchraine]

Did you get the cable the right way round?    Socket end to socket and router end to router?    It can make a difference especially as the pairs are twisted together and a reverse twist will have a negative effect.

[pctech]

Yer pulling my leg aren't you?

Connectors are same both ends and there's no indication at all.

[Polchraine]

Yer pulling my leg aren't you?

Connectors are same both ends and there's no indication at all.

Look at the text - the connection should flow along in the direction the writing on the outer sheath!

[wecpcs]

Look at the text - the connection should flow along in the direction the writing on the outer sheath!

That is complete rubbish, as I used to make up network leads when I had my own computer shop. The only differences are a normal (straight connected) patch cable for normal use and a crosswired cable for connecting together directly two PC's without a hub or switch.

Colin

[cavillas]

Most routers and Lan cards/connections nowadays automatically sense which way round they are connected.

[pctech]

I knew about Ethernet (Cat 5/5e cable) but thought I'd ask as this is telephone wire.

Anyway am just going to leave well alone and see what happens.

[Lance]

Data will flow both ways through the cable regardless of the direction of the text.

[Polchraine]

Data will flow both ways through the cable regardless of the direction of the text.

But depending on the way the cable is drawn and thus the way the copper atoms lie will dictate the attentuation at high frequencies and rate of current flow.   One way will be fine, but the other with cause a slowdown.

[john]

There's some info here about wires and cables (page 3 mentions twisted pairs, don't know if it's of any interest 

[Polchraine]

There's some info here about wires and cables (page 3 mentions twisted pairs, don't know if it's of any interest 

An dmore importantly, it is essential to read and understand:  http://www.st-andrews.ac.uk/~www_pa/Scots_Guide/audio/skineffect/page1.html

[pctech]

Errr thanks

*steam begins to emerge from pctech's ears as his brain tries to work out the equations in the last link

I've just rebooted remotely again as sync had gone down to 3390, went back to 3424, will see what happens over the next few days.

[Ray]

 

[pctech]

Exactly Ray.

Can't do with my brain going pop today as am supervising 4 new recruits.

[Simon]

An dmore importantly, it is essential to read and understand:  http://www.st-andrews.ac.uk/~www_pa/Scots_Guide/audio/skineffect/page1.html

Err... quite! 

Although, I have to admit, I have been told before that with HiFi, it does matter which 'direction' some of the cables run in.

[Rik]

I actually did find that the direction of speaker wiring produced different results with high end equipment.

[pctech]

This is turning into something of a dark art.

[Rik]

Anything to do with comms is, Mitch.

[pctech]

Indeed, I might just end up calling on The Force.

[Rik]

Thames Valley?

[Polchraine]

Indeed, I might just end up calling on The Force.

how you wind up surplus cables may also affect performance.  Wind up the right way and get great results

[Simon]

I'm beginning to think this is a wind up. 

[Rik]

No, that's true too...

[Polchraine]

there is plenty of wind up here at 37000 feet

[pctech]

Like I said earlier I did wonder whether my leg was being pulled, had you mentioned Dilithium crystals then I'd know you were taking the Michael.

I'm going to leave well alone now and see what happens.

[Rik]

You can see the electrons, Mitch?

[pctech]

 

No but would be useful at times.

[Rik]

 

[Polchraine]

You can see the electrons, Mitch?

if he can see them, he needs to ensure that they are travelling in the right  direction and overall there are the same number travelling in the opposite direction

[pctech]

if he can see them, he needs to ensure that they are travelling in the right  direction and overall there are the same number travelling in the opposite direction

Anyone got Clark Kent's number handy 

[Polchraine]

Anyone got Clark Kent's number handy 

No, but I have Ken Clark's ... 01159 232xxx

[pctech]

 

[sobranie]

Like I said earlier I did wonder whether my leg was being pulled, had you mentioned Dilithium crystals then I'd know you were taking the Michael.

I'm going to leave well alone now and see what happens.

I used to know a Welsh battery salesman called Di Lithium.   

[pctech]