Re: What sort of fault might this be?

In article <95KdnaRhG6IBPX3VnZ2dnUVZ8qrinZ2d@posted.plusnet>,
Peter Crosland <g6jns@yahoo.co.uk> wrote:
>> Heres one that's new to me )-:
>>
>> Elminated all internal wiring by plugging directly into master socket. I
>> have tried 3 different microfilters and 2 differnet modem/routers, but
>> the result is the same :-
>>
>> With the modem/router turned off, the phone line is clear, but as soon as
>> I turn the router on and it starts to sync the line starts to sound hissy
>> with the occasional crackle. This i swith nothing more than a microfilter
>> plugged into the test port, a standard analogue phone and Draytek router
>> (one of 2 I've tried - a 2600+ and a 2600vg)
>>
>> Broadband is mostly the full 8Mb, although I'm only 0.5Km from the
>> exchange, SNR isn't really what I'd expect. Currently seeing:
>>
>> up: 736000 down: 6880000 snr: 15.5 loopAtt:23.0
>>
>> So I know that if I call BT they'll just tell me it's my equipment,
>> (as in, oh listen, it's silent when you turn off the router so it must
>> be the router) and charge me for a call-out fee, so is there anything
>> that anyone in the past has seen that would cause this? Something I
>> could tell the BT teletubby that they might belive?
>>
>> This has happened before - during a period of bad weather, but it's been
>> nice here for weeks now!
>>
>> If anyone has any clues, magic words to say to BT, etc. I'd appreciate it.
>
>
>At the risk of stating the obvious have you tried just the filter and router
>plugged into the test socket with nothing else connected? It does appear
>likely that the problem is not with BT so don't involve them. The other
>possibility is that both router and/or filters have faults. Can you borrow
>another of both to try? Are the filter good quality branded ones rather than
>the anonymous T shaped variety?

Yes, I have tried both routers directly into the socket - they sync OK, but
not at the values I'd expect. (Same SNR/LoopAtt values)

And while there is a possibility the router have faults, I doubt it -
I've been using them since I got ADSL. I have graphs of the SNR/LoopAtt
values too for the past year, so I know it's never been right for a long
time (considering my distance from the exchange and based on neighbours
connections) - it's only recently it's started to get worse...

Actually, I've tried 4 microfilters - the "normal" one I use is a box
mounted faceplate from solwise - at the end of 5m of cat5 cable from
the master socket - that yields the same results, so I went right back
to the master socket for the rest of my tests.

I'm fairly sure I did ready about someone recently with a similar fault,
but I've done a search here and elsewhere, but not come up with anything
yet - corroded wire, high resistance, bad connection, *something* like
that in the external BT cabling, but ...

Gordon
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