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Author Topic: Do ADSL filters degrade over time ?  (Read 5513 times)

ac427

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Do ADSL filters degrade over time ?
« on: August 26, 2015, 06:14:03 PM »

My BT Infinity 2 unlimited download speed has slowed dramatically.

I will conduct a test where i disconnect all the phone and plug the HH5 directly int the master phone jack.

Before i do all that, i was wondering if ADSL filters degrade over time?

Where is thebest place to buy new ones, Maplin ?

The voice call side is fine.
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Weaver

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Re: Do ADSL filters degrade over time ?
« Reply #1 on: August 26, 2015, 06:22:21 PM »

DSL filters shouldn't deteriorate in this way.

If you Google "faceplate mk3", you will see - for example -

    http://www.amazon.co.uk/GENUINE-BT-Openreach-Interstitial-Compatible-White/dp/B00NMUXPOS

Maplin is a good shop but not cheap.
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Weaver

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Re: Do ADSL filters degrade over time ?
« Reply #2 on: August 26, 2015, 06:25:15 PM »

There is a huge variety of reasons why your speeds might have descreased.

One thing to do is to eliminate bad cables, and also best to eliminate wireless, use a wireful network connection to your computer.
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Black Sheep

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Re: Do ADSL filters degrade over time ?
« Reply #3 on: August 26, 2015, 06:52:25 PM »

As Weaver has mooted ......... there are many and varied reasons as to why your circuit speed has lessened. Also, to answer your question, 'Do ADSL filters degrade over time', well yes, everything degrades over time ... it depends on the quality of the component and how it was initially manufactured I suppose ?

 
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ac427

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Re: Do ADSL filters degrade over time ?
« Reply #4 on: August 26, 2015, 08:14:17 PM »

Thanks all,

So would it be fait to say, ADSL filters are generally not to blame for poor download speeds ?

I only use wired connections. I guess i could disable wireless on the BT HH5 too.
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Weaver

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Re: Do ADSL filters degrade over time ?
« Reply #5 on: August 26, 2015, 09:32:48 PM »

Clarification, when I said eliminate wireless, I meant just for the purposes of testing. I didn't mean to say that wireless is a performance killer. Reading that back, I think it looks rather ambiguous now.   :)
« Last Edit: August 26, 2015, 09:35:03 PM by Weaver »
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sevenlayermuddle

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Re: Do ADSL filters degrade over time ?
« Reply #6 on: August 26, 2015, 10:15:55 PM »

As others have said, there are lots of reasons for degradation.

Unfortunately one very common reason is that vdsl (fttc) is badly affected by crosstalk.  The more people using the service, the lower are the achievable speeds.   Obviously, those who were first to take up the service see the biggest drops.   In my own case, which I think is typical, downstream rate has decline by about half,  over the year since fttc arrived in the village.  I was pretty much the very first adopter, mind.

There is absolutely nothing you can do about  cross talk, although there is some hope that new cabinet hardware may be developed/deployed that attempts to overcome or reduce its effects.
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ac427

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Re: Do ADSL filters degrade over time ?
« Reply #7 on: August 27, 2015, 01:11:08 AM »

I was wondering about contention

However I am only getting 250k/sec download with BT Infinity 2 unlimited.

I will do the sole wired device test direct to the main BT socket and report back.

Are the NTE5 BT sockets worth having ?

Does FTTC stad for Fibre to the Cabinet ?
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sevenlayermuddle

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Re: Do ADSL filters degrade over time ?
« Reply #8 on: August 27, 2015, 01:27:55 AM »

Contention and crosstalk are very different.   The former can be solved by an ISP willing to throw money at it, but crosstalk is a physical/electrical limitation of the wiring twist cabinet and customer premises.

FTTC is Fibre to the cabinet.

If testing at master socket one thing is commonly misunderstood, especially by Indian helpdesks... you need to unscrew the faceplate and pull it, to reveal the 'true' master socket.   That eliminates rest of the internal wiring.  Simply plugging the modem into the master socket faceplate, vs any connected extension, is unlikely to make any difference.

250k is very slow.   You don't say whether that is byte or bits but either way, it is slow for FTTC.   Roughly how far are you from the cabinet? 

alternatively, who's your ISP?   Some do apply 'traffic shaping' policies.

PS, just reallised, you already said BT.
« Last Edit: August 27, 2015, 01:35:33 AM by sevenlayermuddle »
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ac427

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Re: Do ADSL filters degrade over time ?
« Reply #9 on: August 27, 2015, 09:57:06 AM »

Contention and crosstalk are very different.   The former can be solved by an ISP willing to throw money at it, but crosstalk is a physical/electrical limitation of the wiring twist cabinet and customer premises.

FTTC is Fibre to the cabinet.

If testing at master socket one thing is commonly misunderstood, especially by Indian helpdesks... you need to unscrew the faceplate and pull it, to reveal the 'true' master socket.   That eliminates rest of the internal wiring.  Simply plugging the modem into the master socket faceplate, vs any connected extension, is unlikely to make any difference.

250k is very slow.   You don't say whether that is byte or bits but either way, it is slow for FTTC.   Roughly how far are you from the cabinet? 

alternatively, who's your ISP?   Some do apply 'traffic shaping' policies.

PS, just reallised, you already said BT.

Thanks for the info.

I am under a quarter of a mile away

How is the master socket isolated electrically from the main socket, is it an extra pair for testing purposes ?
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GigabitEthernet

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Re: Do ADSL filters degrade over time ?
« Reply #10 on: August 27, 2015, 10:17:15 AM »

If you connect to the test socket, what you've done is to disconnect the extension wiring from the telephone line.

So the only thing on the phone line is the modem, which will now sync as fast as it can.
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CrazyTeeka

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Re: Do ADSL filters degrade over time ?
« Reply #11 on: August 27, 2015, 10:31:12 AM »

If you connect to the test socket, what you've done is to disconnect the extension wiring from the telephone line.

So the only thing on the phone line is the modem, which will now sync as fast as it can.

This includes invisible/no extension wiring.  ;)
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Weaver

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Re: Do ADSL filters degrade over time ?
« Reply #12 on: August 28, 2015, 05:07:06 AM »

If you pull away the lower front half of the NTE5, you reveal the test socket which is attached to the back part. The test socket is wired straight out to the outside world with nothing at all else connected to it.

The lower front part remaining in your hand has a plug on the back of it which sticks out. This was going straight into the test socket before you pulled the front part away, so you just disconnected the plug-into-test-socket connection. Apologies for this being so wordy, pics would be a lot easier. :-)

Any extension wiring should be wired into the terminals on the back of the removable front half in your hand. So by pulling away the front half, you just made all the extension wiring go away, for test purposes.

If you use a faceplate type filter (is this called an SSFP?) stuck on the front half then you will have two sockets on the front side and the same plug sticking out at the back which goes into the test socket as before. On the front of the filter there will be an RJ-45 (an RJ-11 plug, ever so slightly smaller, will fit ok) for DSL and a BT socket for a telephone. On the back side of the filter there will also be terminals for wiring extensions on to.

Hope that made sense.
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roseway

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Re: Do ADSL filters degrade over time ?
« Reply #13 on: August 28, 2015, 07:18:37 AM »

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