Could some kind soul please have a look at my line history (anoggin on MDWS) and venture an opinion as to why I have seen a large improvement in SNRM and attainable sync recently?
I have had FTTC service with Zen for 17 months. For nearly the whole of that time, SNRM downstream was between 3 and 6, and attainable sync as calculated by my VMG1312-B10D was around 37 Kbps. The line would generally stay up for a month or so at a time. Error rates have never been a cause for concern.
In mid-November I began to get resyncs every day or two with a reason of Remote Defect Indicator. After the last of these, on 8 December, DS SNRM went from around 3 to around 12 and attainable sync went from 37 Kbps to 57 Kbps. These new figures are far better than anything I have ever seen before. They have remained as steady at these new levels as they were earlier at the old, much poorer levels. Nothing has changed in the house.
I was the first person to get FTTC service on our cabinet, and in the first few months as others came online, my speeds declined by less than 10%. This suggests to me that crosstalk has never been a big issue, and therefore the recent big improvement is unlikely to be the result of a crosstalker ceasing service.
So what could be going on? It is as if I have moved my house a few hundred metres nearer the cabinet. I'm not complaining, of course, but my reason for trying to understand the improvement is that it might now be worth my while moving from Zen Fibre 1 (38 Mbps max) to Fibre 2 (76 Mbps max). But I don't want to do that if the SNRM improvement is likely to be temporary.
All views will be gratefully received.
