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    More life in those copper lines?

    This is a discussion on More life in those copper lines? within the Sky Broadband help forums, part of the Sky Broadband help and support category; Just saw the following article on ISPreview. Not sure how many will see the benefit, but looks like there's still ...

    1. #1
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      More life in those copper lines?

      Just saw the following article on ISPreview. Not sure how many will see the benefit, but looks like there's still a few more Mbps to squeeze out of the copper lines!

      Sky Broadband and BT Upgrade UK Internet Platforms to Boost Performance - ISPreview UK

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    4. #2
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      Re: More life in those copper lines?

      Thanks for spotting the article mattan.

      G.INP was introduced across the network in February this year. I hadn't heard of 'Nitro' previously.

      You do need a suitable router to take advantage of the improvements, as well as a good line. Currently the SR101, SR102 and Sagem 2504N (with the latest firmware) all support the new features.

      I need to check in later, but it would be very interesting if the ADSL2+ package will be increased to 30mbps! I hope that they will also increase the upload speed too. IMHO this is just as important as the download speed. and why I specifically wanted to get SFUP.

      When we researched G.INP, it was found that it was designed for FTTC originally so it is nice to see that BTO are finally looking to add it too.

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
      Previous ADSL2+ Speed 19999 kbps 1153 kbps, Line Attenuation 17.5 db 6.9 db, Noise Margin 7.5 dB 8.7 dB
      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

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      Re: More life in those copper lines?

      Cant see nitro being much use

      All it does is compress the payload that goes over atm

      for webbrowsing this will work but will add a few ms to compress the payload but webbrowsing isnt going to saturate your line is it
      so totally pointless

      for downloads they are usually compressed anyway zip tar 7zip movies are already compressed etc..
      so minimal if any gains so again totally pointless

      this was done on dialup it was called v42bis its hardly new and not much use on a decent line

      turning off v42bis on dialup used to take my ping from around 120-130 to 90-100 and this was a hardware modem not a soft one

      what this meant was that even though i only dialed in at 52,000 bits per second around 5k
      I could download a text file at around 12k everything else still downloaded at the normal 5k
      all this will do is add extra delays and problems

      The only time i would ever consider turning this on in this day and age is if my line was only capable of like 1/2 a mbit

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      Re: More life in those copper lines?

      Nitro Mode works to increase the throughput on broadband links by compressing the ADSL2+ ATM header, thus requiring fewer bits to be transmitted and potentially giving you the impression of being able to get a faster connection (though the limits of your physical line remain the same).
      The placebo effect in other words.

      TomD


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      G.inp will probably give more of a benefit than nitro

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      Re: More life in those copper lines?

      well i am on dsl+2 myself so il see if it improves or not its not so much download i want more upload.

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      Re: More life in those copper lines?

      Quote Originally Posted by deadman1984 View Post
      well i am on dsl+2 myself so il see if it improves or not its not so much download i want more upload.
      You will need to get Sky Fibre then. It is available at half price for 6 months at the moment.

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      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

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      Re: More life in those copper lines?

      cant they just give it free lol.

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      Re: More life in those copper lines?

      Quote Originally Posted by deadman1984 View Post
      cant they just give it free lol.
      Only if they were to do something really special for SFUP subscribers too.

      5 per month anyone?

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
      Previous ADSL2+ Speed 19999 kbps 1153 kbps, Line Attenuation 17.5 db 6.9 db, Noise Margin 7.5 dB 8.7 dB
      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

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      Re: More life in those copper lines?

      V.42bis, also an adaptive data compression standard, is based on the Lempel Ziv dynamic dictionary approach, and may go to "transparent mode," in which data is transmitted uncompressed. The specific algorithm is "BTLZ" (British Telecom Lempel Ziv), which was developed by Alan Clark (then with BT, now with Telchemy).
      V.44 is based on LZJH (Lempel-Ziv-Jeff-Heath) adaptive data compression developed by Hughes Electronics for its DirecPC satellite Internet, and incorporated into the v.92 dial-up modem standard. V.44 offers somewhat better compression performance for certain types of data than the V.42bis standard, on average allowing 15% greater throughput. For instance, a 53.3 kbit/s connection with V.44 can transmit up to 53.36 = 320 kbit/s using pure text. In reality, the overall data rate rarely exceeds 3:1 compression (~150 kbit/s). It should be noted that the compression tends to get better and worse over time due to noise on the line, or due to the transfer of already-compressed files (ZIP files, JPEG images, MP3 audio, MPEG video). At some points the modem will be sending compressed files at 53 kbit/s, uncompressed files at 160 kbit/s, and pure text at 320 kbit/s, or any value in between.[5][6]

     

     

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