>> low RX power even though he was not particularly close to the exchange
>> He was showing a low synch rate for his attenuation and SNR margin . I just wondered if that could be the cause ?
Possibly,
I'd normally recommend that a resync is in order. You can sometimes see this occur on a line that has had a bad sync, then the SNRM shoots back up and recovers.
I dont know the actual figures that trigger it, so the following is just an example....
....but it could be say that after the noise burst, the SNRM goes up to 20dB.
The dslam will think hmmm SNR too high.. signal too strong... reduce power output.
Ive seen this occur on my own line a few times where power output drops to about 14/15 after a low sync due to something like a storm or powercut.
Can also be symptomatic of a problem on the line or linecard.
>> interleave depth of 160
hmmmm I must profess Ive never seen one that high! like you say I would expect it to be a multiple.
Perhaps a firmware reporting issue.. and it should actually be 16?
Is that line by any chance using adsl2/ adsl2+/21CN?
s=1/2mode isnt really used on dsl max - which is when I wrote those figures on that page
me wonders if s=1/2 mode (used by adsl2/2+) now means that the depth can be increased further if the DLM decides its in order.
/stresses that the above is a theory and could be complete twaddle.
>> Still learning
Youre doing a grand job and learning fast
- See youre asking Q's that I dont fully know the answer too
