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DaneJasper
Sonic.Net
Premium,VIP
join:2001-08-20
Santa Rosa, CA
kudos:9
reply to FusionOnRGYB

Re: Did not think that interior wiring made such a big differenc

For best performance and reliability, eliminate all flat phone cable - six feet or less of it is "okay", but even that isn't ideal. (Our new modems include a 12 foot twisted-pair line cord.)

-Dane



FusionOnRGYB

@sonic.net

For clarity, you mean to eliminate any flat cable for the modem right?

I'm thinking it should not matter for anything on the voice side of the splitter like my fax.



FusionOnRGYB

@sonic.net

I was digging around and the phone cable that came with my old AT&T modem is round rather than flat. Is this necessarily Cat3?



leibold
Premium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:9
Reviews:
·SONIC.NET

There is no guarantee that a round phone cable actually consists of twisted pairs.
Ideally if it came with a DSL modem it should be a twisted pair cable but it would not surprise me if some vendors would cut corners even there.
Quality cable will have certifications and ratings printed along the length of the cable.
--
Got some spare cpu cycles ? Join Team Helix or Team Starfire!



FusionOnRGYB

@sonic.net

Replacing the flat cable from the splitter to the Cat5 with Cat3 with RJ11 on one end and bare wire into screw post terminal on the other made no difference according to the line stats. I don't know what I was expecting to see, but I suppose increased resistance to noise is a good thing since I cannot predict it. All my findings are on quiet Saturday evening and Sunday afternoon when the nearby laundry machines and fluorescent lights were not operating.

As for the round phone cord, the only thing I can make out is "TIA568B2" and "Cat.5 28AWG". I put this between the wall jack and the modem and compared to flat cable, I did not notice any difference.

Here is Cat3 from the splitter to the Cat5e
»i.imgur.com/0SdsZ.png

Flat cable at the same location.
»i.imgur.com/XTY8L.png



leibold
Premium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:9
Reviews:
·SONIC.NET

It did have a measurable impact after all, even if it is only a 0.2dB improvement in noise margin (every little bit helps) and a slightly higher attainable rate (theoretical maximum speed).

The TIA568B2 indicates that the cable conforms to EIA/TIA specification 568B with the suffix 2 indicating that the cable only has 2 instead of the normal 4 pairs. Cat.5 means that this is a twisted pair cable meeting the tighter specifications for Cat5 cable. 28AWG is the size of each copper wire. This is definitely a good cable to use for your DSL modem.
--
Got some spare cpu cycles ? Join Team Helix or Team Starfire!



NormanS
I gave her time to steal my mind away
Premium,MVM
join:2001-02-14
San Jose, CA
kudos:11
Reviews:
·SONIC.NET
·Pacific Bell - SBC
reply to DaneJasper

said by DaneJasper:

For best performance and reliability, eliminate all flat phone cable - six feet or less of it is "okay", but even that isn't ideal. (Our new modems include a 12 foot twisted-pair line cord.)

That reminds me: GF has a six-conductor flat phone cable to the NID. Strangest thing I ever saw, and terminated with a 6P6C plug (I learned that terminating all six is called, "RJ-25")!

I brought over some remainder CAT-5e cabling from wiring my mother's house. I still need to replace that RJ-25 run with the CAT-5e.
--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum


DaneJasper
Sonic.Net
Premium,VIP
join:2001-08-20
Santa Rosa, CA
kudos:9

We have seen customers use 50 foot Radio Shack "telephone extension cable" to hook up their DSL modem - result is really, really poor performance. Twisted pair is best, and we suggest a maximum of six feet (a typical line cord) of "flat satin".



FusionOnRGYB

@sonic.net
reply to leibold

Thanks for the help leibold! My line is about as good as I care to make it. I did not think that 0.2dB makes any difference because I think that number tends to fluctuate.

I guess another option would be to plug the modem into the splitter and then use the wire run I made for fast Ethernet to the router.

BTW, are the red/green and yellow/black cables twisted pair?



FusionOnRGYB

@sonic.net
reply to NormanS

I used 6P6C flat phone cables at my last job for digital telephones. The 6P4C cables did not work for those phones.



NormanS
I gave her time to steal my mind away
Premium,MVM
join:2001-02-14
San Jose, CA
kudos:11
Reviews:
·SONIC.NET
·Pacific Bell - SBC
reply to FusionOnRGYB

said by FusionOnRGYB :

BTW, are the red/green and yellow/black cables twisted pair?

Not as far as I know. I think it is also called, "station wire", and has no "twist" standard.
--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum

eugenek

join:2002-06-14
Palo Alto, CA
reply to FusionOnRGYB

said by FusionOnRGYB :

I guess another option would be to plug the modem into the splitter and then use the wire run I made for fast Ethernet to the router.

this sounds like a good option - placing the modem at the NID

bswp

join:2010-11-28
Berkeley, CA
reply to FusionOnRGYB

"I guess another option would be to plug the modem into the splitter and then use the wire run I made for fast Ethernet to the router."

Sure, but if your modem is the ZyXel with wifi that Sonic provides for Fusion service, then you may have issues getting the signal where you want it. OTOH, if you just run fast ethernet to a router w/ wifi, good to go.