Thread: Which wire to purchase ??

Hi to all,
The wiring that enters into our apartment seems to have corroded with time and a continuous wiring is essential for achieving good connection speeds. I have been confronted with very low speeds for more than 2 months. Can somebody pls suggest me the kind of telephone quality wire that should be purchase. Roughly I need a little more than 25 meter wire from the groundfloor.

The kind of wiring used within the home ( internal ) and the other brought by the telephone department the black transmission line, rugged in nature. Pls help me to select the appropriate one for a 25m wire.

I am using Finolex telephone cabling for the entire house. They are being used in the company too (ofcourse on my recommendation )

25 meters of telephone cabling will induce much attenuation into the line. And your SNR will be reduced drastically.

Originally Posted by cool_techie_tvm

I am using Finolex telephone cabling for the entire house. They are being used in the company too (ofcourse on my recommendation )

25 meters of telephone cabling will induce much attenuation into the line. And your SNR will be reduced drastically.

Thanks techie, for your suggestion, So which one to use, is the hard black transmission cable the only one ultimately. I assume one those cables can endure all the weather conditions.

Cool techie is right.

Originally Posted by crazydude

Thanks techie, for your suggestion, So which one to use, is the hard black transmission cable the only one ultimately. I assume one those cables can endure all the weather conditions.

Hey doesnt BSNL do the wiring for free? If they do, u can inform them. In here they do all cabling for free.

Originally Posted by cool_techie_tvm

Hey doesnt BSNL do the wiring for free? If they do, u can inform them. In here they do all cabling for free.

Yup, they do it, here the situation was due to the previous wiring already done, so when we changed our house, the wiring remains the same, all the line man does is just come and connect to the relevant cable that comes to the present house. I came to know that, the internal wiring in case if its very poor or with intermittently connected joints, morover due to low quality wire can attenuate the signal rapidly. My attenuation constant is above 43.5 and it is always so.

1.Check for blackening/corrosion/Oxidization of all
contacts, and in the connectors.

2.The connection from Main Telephone Junction Box
to the ADSL Splitter UNIT "LINE" should be SHORT
http://i34.tinypic.com/s4c0me.jpg
( Also rj11 from "ADSL" to "modem ")

3.From the ADSL splitter "Phone" port you can draw any length of cable for your telephone/s. No additional Parallel connection for phone/s from MAIN junction.

4. BSNL will give connection from their Distribution Box
to One room/Hall. (Any other wiring open or concealed
for different rooms customer can do it.

5. Normally there will not be any joints etc in the cable/s
BSNL used. Even if used, they may have joined/twisted and used insulation tapes .

6. If your Phone is NOISE free your line is good.
No crackling noises/external pick up etc.

7. In old telephone connections,
a).. A BLACK BOX WILL BE MOUNTED IN THE WALL.
only screw type junctions.

(b) ... A Yellow box ( with some printed board/condenser etc) with a RJ11 port.
If it is (b) Open the box and connect RJ11 DIRECT.
Data signal Loss possible in this set up.

Give feedback on any improvement/s you have attempted.

Originally Posted by essbebe

1.Check for blackening/corrosion/Oxidization of all
contacts, and in the connectors.

2.The connection from Main Telephone Junction Box
to the ADSL Splitter UNIT "LINE" should be SHORT
http://i34.tinypic.com/s4c0me.jpg
( Also rj11 from "ADSL" to "modem ")

3.From the ADSL splitter "Phone" port you can draw any length of cable for your telephone/s. No additional Parallel connection for phone/s from MAIN junction.

4. BSNL will give connection from their Distribution Box
to One room/Hall. (Any other wiring open or concealed
for different rooms customer can do it.

5. Normally there will not be any joints etc in the cable/s
BSNL used. Even if used, they may have joined/twisted and used insulation tapes .

6. If your Phone is NOISE free your line is good.
No crackling noises/external pick up etc.

7. In old telephone connections,
a).. A BLACK BOX WILL BE MOUNTED IN THE WALL.
only screw type junctions.

(b) ... A Yellow box ( with some printed board/condenser etc) with a RJ11 port.
If it is (b) Open the box and connect RJ11 DIRECT.
Data signal Loss possible in this set up.

Give feedback on any improvement/s you have attempted.

This is the best comprehensive and well delineated suggestion that I have ever got as a reply. Thank you very much essbebe

I have checked everything, the only problem that is persistent over the past 2 months is less speed, and the entire time I spent in finding out all the possible causes. I swapped modems, did lot of study and ultimately I confirmed that the problem is with the line and mentioned that to the BSNL JE and AE, he said, he ll look into the matter... well nothing happened after that

So finally I have made up that a new wire is the only solution. I have bought the wire and soon after its connected, I ll post the results. I have bought the regular telephone wire multistranded telephone cable it didnt cost much only Rs5/metre.

Originally Posted by crazydude

So finally I have made up that a new wire is the only solution. I have bought the wire and soon after its connected, I ll post the results. I have bought the regular telephone wire multistranded telephone cable it didnt cost much only Rs5/metre.

Was the cable of any particular brand? Did u notice it?

At the time of wiring my house i use a quality speaker wire for phone wiring, will i have ANY problem... less speeds or soo (xchange ppl said it takes 15 days to provide me BB)

dont use speaker wire for telephone only use wire with only one conduter with and have very less dia

Originally Posted by bestofhyd

At the time of wiring my house i use a quality speaker wire for phone wiring, will i have ANY problem... less speeds or soo (xchange ppl said it takes 15 days to provide me BB)

Well whether the wiring is good or bad, it can be determined only after the connection is made. The modem will list the line statistics and depending upon the values listed in the modem u can change the wiring or continue using the same.

Originally Posted by cool_techie_tvm

Well whether the wiring is good or bad, it can be determined only after the connection is made. The modem will list the line statistics and depending upon the values listed in the modem u can change the wiring or continue using the same.

Hi to all,
Here are the results, I bought the wire and after suggestions from many people.

-- Well in one statement I would say that the output has deteriorated so much.
My attentuation goes to 50dB i.e. Attenuation = 10*log(Pin / Pout)
Pin = the power where the lineman connects to your home.
Pout = the power received by your modem.

So in my case the power as computed using the above formula for 50dB
Pout = Pin / 1,00,000, that means the power I receive is decreased by one lakh

SNR = Signal to Noise ratio = 10*log ( Signal Power / Noise Power )
When its improved it means your connection is steady, it should be greater than 20dB for a good connection. Not a parameter to be used to determine the speed to such a great extent.

Well I tried two methods.

-- Since the earlier connected is not severed, I compared individually how much attenuation am I getting with the

New wire only
SNR = 13.5,
Attenuation improved = 50dB,
Speed Reduced Drastically only 77Kbps = approx 10KBps )

Old wire only
SNR = 13.5
Attenuation reduced = 44.5dB
Speed better than new one = fluctuates to about 400-600Kbps

Both twisted together ( A desparate attempt in case if it works )
SNR = improved 18dB
Speed reduced
Attenuation not improved

Well I know something about Skin Effect in case of AC and high frequency signals as in Transmission lines, I m not aware of the practicality of it in my situation. Can someone advise me if that might have been the cause for increased attenuation in multistranded wire pair = the new wire that I used

Pls share your views upon this and advise based on your observations.
Thank You.

Mention your modem/router model/make.

Post ADSL data page screen shot.

Try only Mod Gdmt/t413/Glite/bitswap enabled.

Confirm Phone line is noise free.

Originally Posted by essbebe

Mention your modem/router model/make.

Post ADSL data page screen shot.

Try only Mod Gdmt/t413/Glite/bitswap enabled.

Confirm Phone line is noise free.

Till to date, there was no trouble because of the telephone. In every situation it was with the broadband only. It was only these days that there is a lot of problem. My modem indubitably is a less accusable culprit, as its performance was reduced over the past 3 years, the performance remains the same when my friends lines were used to test the parameters.

I had tried all of my friends modems especially UBSOFT model R2000u, it worked very well though attenuation was high i.e. the parameters shown remains the same, still the speeds did reach 2mbps admirably.. mine never ever crosses 700Kbps be it any time. But in their houses my modem touches even 180KBps and with their modem, the full speed.

Well finally I have with the checked with connection itself just a few hours ago at the point where our line was connected to the house, at the very same point I get an attenuation close to 44dB.

Regarding the mode like ADSL, GLite etc, I changed, its no use, the modem fails to even establish the link, I had to roll back to the earlier options.

Originally Posted by crazydude

Regarding the mode like ADSL, GLite etc, I changed, its no use, the modem fails to even establish the link, I had to roll back to the earlier options.

Does the modem have an auto modulation mode? If so, please select it.