Marginal line

Discussion in 'Broadband' started by John, Mar 23, 2005.

  1. John

    John Guest

    I have just had 512k ADSL installed. The router will only synch when
    connected to the internal test socket of the BT master socket and it
    then reports downstream attenuation 63.9 snr 7.5

    I intend to fit a filtered faceplate on the master but then have a choice

    a) run phone cable extension of 25 meters to where I would prefer to
    have the router

    b) position the router by the master socket and run CAT5 to the PC

    Since it is working at the master socket will BT (via ISP) make any
    attempt to improve the SNR

    What do you think?

    John, Mar 23, 2005
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  2. sounds good, and a fairly typical result where the two add up to 70 dB
    or so.
    or wireless ? Either will work, use decent twisted pair (not flat)
    extension cable for a) or indeed Cat5 (you could run a filtered and
    unfiltered extension in the same Cat5).
    they will do the faceplate thing if you complain to the ISP its not
    reliable. May mess about with other stuff too so worth a go even if
    only for the free faceplate. NB request via ISP not direct to BT>

    Tiscali - dialup speeds at Broadband prices :)

    Phil Thompson, Mar 23, 2005
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  3. John

    kraftee Guest

    If you want Bt to tweak your internal wiring that's going to cost you......

    You could try disconnecting all wires bar pins 2 & 5 (at the NTE5) it could
    make the difference (each micro filter has a ring circuit built in) & you've
    nothing to lose..
    kraftee, Mar 23, 2005
  4. if they do the SSFP thing it isolates it in any case. How many of
    these are been put in in practice - hardly any, a few, lots ??

    Tiscali - dialup speeds at Broadband prices :)

    Phil Thompson, Mar 24, 2005
  5. John

    Chris Jones Guest

    I have just had 512k ADSL installed. The router will only synch when
    An SNR of 7.5 is very poor and is why you're having problems. There's no
    guarantee that a filtered faceplate will fix it, but it's worth a try of

    It's always worth asking BT if they can do anything to improve the line, but
    you won't necessarily get anything out of them.
    Chris Jones, Mar 24, 2005
  6. John

    kraftee Guest

    More than what the management wanted & less than what the field staff want
    kraftee, Mar 24, 2005
  7. John

    johnydeath Guest

    I'm guessing it should be fine at 63.9/7.5dB - I've been 65/6.5 for 18
    months with 100% service. Have you considered trying a different brand
    of router?
    johnydeath, Mar 25, 2005
  8. Doesn't it depend whether it's SNR or SNR margin???
    What about trying Phil's suggested 256kbps Zen service?? That should be
    3db or so better??
    robert w hall, Mar 25, 2005
  9. John

    John Guest

    I tried three different brands of (admittedly cheap) routers and the
    above figures are from the only one which would stay synched for more
    than a few seconds. The connection appears solid enough at the moment
    but we will need to see what happens with bit of rain and wind around.

    I have a Clarity filtered faceplate on order to tidy up the wiring at
    the BT master which currently has the removable bit unplugged and a
    filter into the test socket and router into the filter and 10 metre CAT
    5 to the PC.

    John, Mar 25, 2005
  10. John

    johnydeath Guest

    I'm using an olde D-Link 4port DSL-504 that I used at my old pad 2.5 yrs
    ago. I was exceptionally far from the exchange then: -68dB & 3.5dB s/n,
    worked great all summer and winter days, fell over between dusk and
    dawn. I've just picked up a 2nd hand one off theifbay for my out-laws
    for £15 as I know it is a reasonable one.

    I'll keep fingers Xed for you.
    johnydeath, Mar 25, 2005
  11. John

    David Wade Guest

    My speed touch 510 reports

    Downstream Upstream
    Margin [dB] : 31 27
    Attenuation [dB] : 25 11

    is this good or bad?
    David Wade, Mar 25, 2005
  12. very good, do 6 or 8M if it were available

    Tiscali - dialup speeds at Broadband prices :)

    Phil Thompson, Mar 25, 2005
  13. I managed to get a decent 512kbit connection on a line with 72db
    attenuation. Didn't work before the filtered face plate was added,
    but that boosted the SNR to 6-10db at which point the router could
    hold a stable connection. Draytek routers are not cheap, however.
    Simon Pleasants, Mar 29, 2005
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