gbF( // guestbook.pl "doug","","Sat, 22 Dec 2007 11:22:37 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.jarviser.co.uk/jarviser/broadbandspeed.html", "Improving your BT Line based Broadband Speed - Cut the Bellwire!", "", "Improving your BT Line based Broadband Speed - Cut the Bellwire!
\ May 2007
\ Modification of this type to your extension wiring is quite LEGAL in the UK.
\
\ This cure for RF interference works whether you have Linux, Mac or Windows, but only if you have phone extensions in your house.
\ Even if your hub is plugged into the BT master socket and your extensions are unused, if you have the bellwire connected in those extensions it can generate radio frequency (RF) interference down the BT lines and reduce your exchange profile speed setting.
\ If you have no bellwire interference, this fix will do no harm even if there is no improvement, and will protect from future RF interference.
\ If you want to cut the science and go straight to the fix look here " ); gbF( // guestbook.pl "doug","","Sat, 22 Dec 2007 20:46:27 UTC+0100","213.122.5.59 | host213-122-5-59.in-addr.btopenworld.com ", "", "http://forums.vnunet.com/message.jspa?messageID=766842", "Anyhow back on track - Why the \"ring wire trick\" may work for a few people. ", "", "Anyhow back on track - Why the \"ring wire trick\" may work for a few people.
\
\ Telephone voice data (PSTN) uses the 0-4kHz frequencies.
\
\ Dial up uses the same frequency as voice data (you cant use phone and dial up at same time).
\
\ ADSL works by using available frequencies in the phone line which isnt used by voice data.
\
\ The full range for adsl is 25 kHz to 1104 kHz. The higher the speed - the higher the frequency used.
\
\
\
\ If affected, the ring wire adds interference in the 600 kHz - 1 MHz range (similar range to AM radio - see below).
\
\ Therefore if you have a problem with the bell wire - it affects the higher end range of frequencies by the downstream adsl signal.
\
\
\
\ Exactly what is happening in this circumstance is if the bell wire is in a loop around your property then the bell wire could act as a rather large radio antenna and pick up AM radio frequencies which are in the range of 540 to 1600 kHz.
\
\ " ); gbF( // guestbook.pl "Your name","","Sat, 22 Dec 2007 20:49:08 UTC+0100","213.122.5.59 | host213-122-5-59.in-addr.btopenworld.com ", "", "http://www.thinkbroadband.com/faq/sections/radsl.html", "I\'ve heard removing the ring wire can improve my connection, how do I do this?", "", "
\ I\'ve heard removing the ring wire can improve my connection, how do I do this?
\ The ring wire (sometimes called bell wire) is a hang-over from old telephones that needed the telephone line to generate the bell ringing signal on a third wire. Modern telephones generally do not need this third wire, and its presence creates an imbalance in the telephone wiring and can cause rate adaptive ADSL connections to connect slower than would otherwise be expected.
\
\ If you have already fitted an NTE5 ADSL faceplate then removing the ring wire will not make any difference. It should be noted that any improvements will be immediately apparent if you look at the connection speeds reported by your ADSL modem after it has restarted. Actual download speeds on a Max product will take some time to improve due to the delay in the IP Profile improving which is between 75 minutes and five days.
\
\
\ Click image for larger version
\
\ The image above shows a standard BT Master Socket with the removable faceplate lifted off. There are four wires connected; the blue pair to pins two and five, and the orange pair to pins three and four. The ring wire is the wire on pin three, i.e. orange wire with a white strip. It should be pointed out that old wiring may use just four solid colours and the wires will not be twisted together, in which case rewiring the telephone extensions in the property to use modern twisted pair phone cables is worthwhile; www.adslnation.com stocks suitable cable. To disconnect it lift the wire away from the metal conductor as shown below:
\
\
\ Click image for larger version
\
\ Removing the wire on pin 3 on the other sockets around your property may help. As with any changes make sure your telephones and ADSL still work and if not return your wiring to its previous state, to test the phones fully you need to make an incoming call to check they still ring. NOTE: if refitting a wire to connectors like those in the sockets, an IDC Krone tool must be used which can be purchased at stores that sell telephone extension kits (such as DIY stores) and also online.
\
\ This procedure of removing the ring wire is also useful if you do not have an identifiable master socket in the property.
\
\ --------------------------------------------------------------------------------
\ " ); gbF( // guestbook.pl "Your name","","Sat, 22 Dec 2007 20:51:17 UTC+0100","213.122.5.59 | host213-122-5-59.in-addr.btopenworld.com ", "", "http://www.routertech.org/kb.php?mode=article&k=36", "Disconnecting the bellwire ", "", "Author Kieran
\ Date Tue Dec 26, 2006 6:41 pm
\ Views 1140
\ Description The possible benefits to ADSL signal strength by disconnecting the bellwire are discussed
\ Category ADSL Articles Type Guide
\ --------------------------------------------------------------------------------
\
\ --------------------------------------------------------------------------------
\
\ Disconnecting the bellwire
\ ------------------------------ Article submitted by eMuNix ------------------------------
\
\ In an effort to improve my connection, which has been steadily deteriorating over the past couple of weeks, I have been experimenting with the wiring to the phone sockets. The connection is equally poor with either a Speedtouch 546 or a Safecom SART2-4115 attached, so not a modem issue. There is documentation that indicates that the bellwire can introduce interference into a line and thus give problems with ADSL.
\
\ Using the DMT tool (sadly does not have a version that works with AR7 chips) I can graph the frequencies that my connection uses and analyse where there may be gaps due to interference etc. In the first image we can see a graph of my connection with the bellwire (orange/white stripes connected to terminal 3) still attached:-
\
\ " ); gbF( // guestbook.pl "Your name","","Tue, 8 Jan 2008 07:45:05 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.4i2i.com/adsl.htm", "ADSL Tutorial", "", "http://www.4i2i.com/adsl.htm
\ ADSL Tutorial
\
\
\
\ Background
\
\
\
\ Asymmetric Digital Subscriber Line offers the benefits of the Information Superhighway without the expense or wait. ADSL enables the delivery of switched digital video services now over the existing telephone infrastructure, composed primarily of copper wire pair, instead of waiting for the implementation of costly new cabling systems
\ " ); gbF( // guestbook.pl "Your name","","Wed, 23 Jan 2008 07:25:05 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.telephonesuk.co.uk/746_telephone.htm", "FURTHER INFORMATION ON THE GPO 746 TELEPHONE", "", "Oh for Google!
\
\ Have a look for:
\ http://www.telephonesuk.co.uk/746_telephone.htm
\
\ Here is the circuit for the 746. Read Note D about extensions:
\ http://www.telephonesuk.co.uk/images/746_image1a.jpg
\ [img]http://www.telephonesuk.co.uk/images/746_image1a.jpg[/img]
\
\
\
\ Here is the circuit for wiring extensions:
\ http://www.telephonesuk.co.uk/images/746_image9a.jpg
\
\ [img]http://www.telephonesuk.co.uk/images/746_image9a.jpg[/img]
\
\
\ So this explains the history to the bell wire.
\
\ " ); gbF( // guestbook.pl "Your name","","Wed, 23 Jan 2008 07:35:43 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.samhallas.co.uk/repository/n_diagrams/0000/N846.pdf", "PDF with clear wiring diagrams of 746 telephones", "", "PDF with clear wiring diagrams of extension phones." ); gbF( // guestbook.pl "Your name","","Wed, 23 Jan 2008 21:08:33 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.telephonesuk.co.uk/line_jacks.htm#NTE", "LINE JACK UNITS, VOICE JACK UNITS & DATA JACK UNITS, JACKS & JACK SOCKETS, NETWORK TERMINATION EQUIPMENT (NTE), ISDN2 AND HOME HIGHWAY ADAPTORS", "", "LINE JACK UNITS, VOICE JACK UNITS & DATA JACK UNITS, JACKS & JACK SOCKETS, NETWORK TERMINATION EQUIPMENT (NTE), ISDN2 AND HOME HIGHWAY ADAPTORS" ); gbF( // guestbook.pl "Your name","","Wed, 23 Jan 2008 21:14:22 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.telephonesuk.co.uk/conversion.htm", "CONVERTING OLD PHONES TO NEW-STYLE WIRING", "", "Advice on converting old telephones to \"new-style\" modular plug-in wiring. Further models will be added shortly.
\
\ " ); gbF( // guestbook.pl "Your name","","Wed, 13 Feb 2008 20:32:53 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.speedguide.net/", "SpeedGuide.net - Your Guide to Broadband ", "", "SpeedGuide.net - Your Guide to Broadband
\
\ \" Some of the best Broadband tweaks and Speed patches on the Net \"
\ The site focuses on system performance, with areas including Broadband Internet connections, Windows, Overclocking, all targeted towards a technically aware audience. A large section of SpeedGuide.net is dedicated to Cable Modems and DSL technology, stressing on improving TCP/IP performance over high speed/latency networks.
\ " ); gbF( // guestbook.pl "Your name","","Fri, 14 Mar 2008 10:51:15 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.draytek.co.uk/support/kb_vigor_linefaults.html", "ADSL Line Faults - General Router FAQ ", "", "General Router FAQ ADSL Line Faults
\
\ When ADSL lines were limited to 2Mb/s, many people\'s lines could reliably connect at that speed but where they couldn\'t (due to line length or quality), the ISP would permanently limit the line speed to what was believed to be prudent. Since the introduction of ADSLMax, it will try to connect at as high a speed as possible based on the current conditions, up to 8Mb/s (the top speed of ADSL). The speed achieved depends on the conditions of the line, which means that quality of lines has become more important. Line length is an important factor, but as you can\'t move your home/office nearer the exchange you can still try to improve your local connections (wiring). In addition, if your line is quite short but connection speeds or reliability are lower than expected, it may be that BT or your ISPs street wiring could be improved.
\
\ " ); gbF( // guestbook.pl "Your name","","Fri, 25 Apr 2008 21:17:28 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.beta.bt.com/bta/forums/thread.jspa?messageID=18164䛴", "Broadband Accelerator Trial: Tune Up Your Internet Speed - SE England ", "", "Broadband Accelerator Trial: Tune Up Your Internet Speed - SE England
\ Posted: Apr 16, 2008 12:07 PM Reply
\
\ BT\'s Home IT Support service is currently trialling \"Broadband Accelerator\", a new service that we hope will improve your internet speed by improving your home wiring and your PC\'s performance, in South London, Surrey, Sussex & Kent.
\
\ How fast your Internet connection is depends on four things:
\
\
\ How well your PC works
\ Your internal wiring
\ Your Broadband network
\ How heavily congested the internet is
\ Your Broadband Network speed depends on how far you are from your exchange. You can check this using the speed checker on bt.com. If your actual speed (which you can check on your Hub) is a lot lower than what we think you should be getting, it could be because your internal wiring is at fault. If your speed is fine but you still find surfing the internet painfully slow during off-peak hours (in the morning, for instance) perhaps your PC needs a service. Broadband Accelerator can help you with both of these problems.
\
\
\ " ); gbF( // guestbook.pl "Your name","","Fri, 25 Apr 2008 21:18:42 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.beta.bt.com/bta/forums/thread.jspa?messageID=18164", "Broadband Accelerator Trial: Tune Up Your Internet Speed - SE England ", "", "BT\'s Home IT Support service is currently trialling \"Broadband Accelerator\", a new service that we hope will improve your internet speed by improving your home wiring and your PC\'s performance, in South London, Surrey, Sussex & Kent.
\
\ How fast your Internet connection is depends on four things:
\
\
\ How well your PC works
\ Your internal wiring
\ Your Broadband network
\ How heavily congested the internet is
\ Your Broadband Network speed depends on how far you are from your exchange. You can check this using the speed checker on bt.com. If your actual speed (which you can check on your Hub) is a lot lower than what we think you should be getting, it could be because your internal wiring is at fault. If your speed is fine but you still find surfing the internet painfully slow during off-peak hours (in the morning, for instance) perhaps your PC needs a service. Broadband Accelerator can help you with both of these problems.
\ " ); gbF( // guestbook.pl "Your name","","Fri, 2 May 2008 20:58:51 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.dougrice.plus.com/Erlangs/ADSL_tutorial.mht", "ADSL Tutorial - saved from 412i\'s web site.", "", "I saved this web page. I found it very interesting.
\ The 4i2i company no longer do this adsl product and I can no linger link to it.
\
\ I have permission to host my saved file from their web site. See www.4i2i.com for current codecs.
\
\
\ ADSL Tutorial
\
\ Background
\
\ Asymmetric Digital Subscriber Line offers the benefits of the Information Superhighway without the expense or wait. ADSL enables the delivery of switched digital video services now over the existing telephone infrastructure, composed primarily of copper wire pair, instead of waiting for the implementation of costly new cabling systems.
\ " ); gbF( // guestbook.pl "Your name","","Sat, 3 May 2008 10:25:42 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.4i2i.com/", "Welcome to 4i2i - the Codec Specialists", "", "Welcome to 4i2i - the Codec Specialists
\
\ 4i2i is an award winning supplier of video and audio Codecs to the broadcast market. We pride ourselves on offering the best video and audio quality available, in a cost effective single device implementation.
\
\ Our IP cores have been successfully implemented in both ASIC\'s and FPGA\'s and for customers requiring a higher level of integration, are also available integrated onto our 4media family of media processing platforms.
\ " ); gbF( // guestbook.pl "Philip Wild","philandpaula@easter-badbea.co.uk","Sat, 3 May 2008 15:13:32 UTC+0100","86.145.134.222 | host86-145-134-222.range86-145.btcentralplus.com ", "", "", "", "", "I found the results of your test very enlightening. When I run the BT speedtester it just gives me the speed but no information on the profile or DSL connection rate. I am supposed to have been transfered from 512 fixed to up to 8 meg (line should achieve 2 meg according to all tests, both BT and KITZ tester. Signal margin is 25.5 dB.
\
\ Main question is how do I get the profile info from the speed tester. Must register with the forum sometime." ); gbF( // guestbook.pl "Steve Mclaren","steve.37.mclaren@openreach.co.uk","Tue, 24 Jun 2008 16:44:14 UTC+0100","193.113.57.167 | ", "", "", "", "", "Doug
\
\ What a great website. Could have looked at it all day. Lots of useful information. I will check it out when I eventually get Broadband into my new home. Long story. nightmare.
\
\ All the best
\
\ Steve" ); gbF( // guestbook.pl "Your name","","Wed, 2 Jul 2008 20:33:10 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://en.wikipedia.org/wiki/ITU_G.992.1", "ITU G.992.1 (better known as G.DMT) is an ITU standard for ADSL", "", "In telecommunications, ITU G.992.1 (better known as G.DMT) is an ITU standard for ADSL using discrete multitone modulation. G.DMT full-rate ADSL expands the usable bandwidth of existing copper telephone lines, delivering high-speed data communications at rates up to 12 Mbit/s downstream and 1.3 Mbit/s upstream.
\
\ " ); gbF( // guestbook.pl "Your name","","Wed, 2 Jul 2008 22:32:09 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://bt.custhelp.com/cgi-bin/bt.cfg/php/enduser/cci/bt_catpage.php?p_sid=FJ*5QM7j&cat_lvl1=346&cat_lvl2=1282&cat_lvl3=1859&p_cv=3.1859&p_cats=346,1282,1859", "Broadband Accelerator - A new service that helps you get the most out of your broadband connection. There is a charge for this service.", "", "On www.bt.com
\
\ You are here: Support & advice > Broadband & Internet > BT Home IT Support > Broadband Accelerator
\
\ Broadband Accelerator
\ A new service that helps you get the most out of your broadband connection. There is a charge for this service.
\
\ Articles 1 to 8 of 8
\
\ What is the Broadband Accelerator service?
\ How can I order Broadband Accelerator?
\ How much faster will my connection be?
\ How does the Broadband Accelerator service work?
\ How does the “No fix no fee” Money Back Guarantee work?
\ How long will the engineer visit take?
\ Will I need to do anything before the engineer visits?
\ How do I claim my Money Back Guarantee?
\ " ); gbF( // guestbook.pl "Your name","","Wed, 2 Jul 2008 22:43:27 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.pcpro.co.uk/news/news/177375/", "The £10 device that could rescue your broadband connection 4:25PM, Wednesday 12th March 2008", "", "News [Internet]
\ Wednesday 12th March 2008
\
\ The £10 device that could rescue your broadband connection 4:25PM, Wednesday 12th March 2008
\
\ BT Wholesale is close to launching an inexpensive new device that could radically improve the speed of ADSL broadband connections.
\ The telecoms giant claims that electrical interference from household objects - including televisions, set-top boxes and even Christmas tree lights - can reduce a broadband connection to a crawl.
\
\ Faulty or leaky power supplies from the electrical equipment interferes with the \"Bell Wire\" running around the home, creating excessive noise on the line.
\
\ However, BT has been trialling a device called an Interstitial Plate - or iPlate - that will slot into the master telephone socket and largely eliminate the noise, providing a significant boost for broadband speeds.
\
\ " ); gbF( // guestbook.pl "Your name","","Wed, 2 Jul 2008 22:45:03 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.pcpro.co.uk/news/209976/bts-broadbandboosting-iplate-goes-on-sale.html", "BT\'s broadband-boosting iPlate goes on sale 7:48AM, Wednesday 2nd July 2008", "", "News [Internet]
\ Wednesday 2nd July 2008
\
\ BT\'s broadband-boosting iPlate goes on sale 7:48AM, Wednesday 2nd July 2008
\
\ BT has started selling the iPlate, the small device that it claims could result in a huge speed boost for domestic ADSL lines.
\ The telecoms giant first announced the iPlate back in March, with BT boldly claiming that its tests showed the device could improve home broadband speeds by as much as 3Mb/sec.
\
\ The iPlate is designed to eradicate interference from the Bell Wire - the cable that used to make old-fashioned telephones ring, but now merely serves to create excessive electrical noise on the line.
\
\ " ); gbF( // guestbook.pl "Your name","","Fri, 4 Jul 2008 07:34:54 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.hmmm.ip3.co.uk/iplate.shtml", "BT I-plate [Interstitial Plate] Bell-wire filter", "", "BT I-plate [Interstitial Plate] Bell-wire filter
\
\ Quotes from BT Wholesale about the Interstitial Plate:
\
\ The bell wire problem
\
\ The third ‘bell wire’ in use with most home extension wiring causes problems for ADSL under certain conditions.
\ A number of complex effects combine to increase the overall level of noise on the line.
\ This increase in noise ultimately reduces bit rate and can cause problems with line stability.
\ The effect can be fairly significant and most homes which have some extension wiring will be suffering to some degree from this issue.
\ Simple, low cost filtering added at the NTE can significantly reduce this effect.
\
\ " ); gbF( // guestbook.pl "Your name","","Tue, 8 Jul 2008 22:36:06 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.dougrice.plus.com/Erlangs/adslNews.htm", "Using a scope to measure the bell filter inductor.", "", "Using a Square wave and scope to measure the L in series with the bell wire.
\
\ The charge is an exponential function of time:
\ Q = Q_{max}[1 - e^{(-t/RC)}]
\
\ i(t) = Imax( 1-exp( -t * R/L )
\
\ 7/4
\
\ With a 1K 5% resistor the LR is 7 units peak to peak and takes 20 us to get to 4.6 units.
\
\ The time constant is 0.63 * 7 = 4.4 = 20 us
\
\ -t*R/L
\ TC = L/R
\
\ TC * R = L
\
\ 20 us * 1000 ohm = L
\
\ L = 20 mH
\
\
\ The LJ 5109/BPADSL filter has an inductance of 8us
\
\ 8 us * 1000 ohm = L
\
\ L = 8 mH
\ " ); gbF( // guestbook.pl "Martin","m-monks@o2.co.uk","Fri, 5 Dec 2008 13:39:57 UTC+0100","194.83.71.232 | ", "Martin", "Martin", "", "", "Have just started a new contract with O2 using adaptive rate (was fixed rate with Toucan) and guess what, my download speed is now 128kbps. This is still in the 1st 10 day settling in period. Had long discussions with O2, but bell wire was not mentioned. Will try this out now. Watch this space." ); gbF( // guestbook.pl "Your name","","Tue, 23 Dec 2008 07:47:44 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.btwholesale.com/pages/static/Products/Internet/i_plate.html", "I Plate BT Wholesale has launched a new filter for the main telephone socket", "", "I Plate BT Wholesale has launched a new filter for the main telephone socket called the I-Plate that can be self installed by the home owner, and which can increase speeds by as much as 4Mbit/s although more typically improvement is closer to 1.5 Mbit/s. Actual improvements depend on the levels of noise present in each home.
\
\
\
\ " ); gbF( // guestbook.pl "Your name","","Sat, 4 Apr 2009 07:19:38 UTC+0100","212.56.108.219 | dougrice.plus.com ", "", "http://www.speedguide.net/tcpoptimizer.php", "The TCP Optimizer is a program designed to provide an easy, intuitive interface for tuning TCP and IP related parameters ", "", "The TCP Optimizer is a program designed to provide an easy, intuitive interface for tuning TCP and IP related parameters in the Windows Registry. It takes into account all related RFCs, the Microsoft TCP/IP implementation oddities, verifies all Registry locations for the same TCP/IP parameters (ICS Sharing, AOL protocol MTU, etc), only ads the necessary Registry parameters, and overall aids in making the whole \"tweaking for speed\" experience a breeze. It is downloadable from here: SG TCP Optimizer.
\
\ " ); gbF( // guestbook.pl "oli","oli_grenier@hotmail.com","Wed, 17 Jun 2009 16:56:31 UTC+0100","78.145.195.125 | ", "", "", "", "", "Hi, just to say thanks for the tip. This brought my ADSL connection from around 2Mb up to 7Mb. Some slight occasional disconnection problems but no more than before.
\ Cheers!" );