Having had some interesting issues with a Sky ADSL line, I migrated to a Pulse8 76/18 FTTC package about six weeks ago. The FTTC cabinet is the other side of our front garden wall, so we are on a full 80/20 sync with no interleaving.
Since then I have been running ThinkBroadband speed tests and get a significant difference between the single thread and multi thread speed test results, with typically a single thread speed of around 40-45 Mbps and a multithread speed of 68-72 Mbps:
http://www.thinkbroadband.com/speedtest/results.html?id=148231153859403321549The usual thoughts on this sort of speed difference is that it might be congestion or traffic management.
However, the speed tests are pretty consistent day and night so congestion seems unlikely. Traffic management is a possibility but as far as I know Pulse8 are just reselling a TTB connection (the line is recognised as a TTB line on speed tests) and there seems to be plenty of TTB customers that get their single and multi thread results coincident.
However to try and rule either congestion or traffic management out, I have upgraded from a Home to a Business connection. This has made no discernible difference to the speed test results.
I have also borrowed some other VDSL kit (modem / router) to try and rule out my ZyXel VMG8924 being the root cause and that gave slightly worse results.
I have also validated the single thread results by downloading the 512MB TBB test file, which downloads in 90-100s so supporting the 40Mbps results seen in the speed test.
Pulse8's (actually TTB's) speed test usually gives me a whopping 72 Mbps download speed, but that is a multithread test on port 8080.
The TTB quality monitoring tool also doesn't give me any major concerns:
http://www.thinkbroadband.com/ping/share/a367401607150ffbaf6e453b9f2bc163-21-12-2016.htmlWith the exception of an interesting yellow burst at 1am this morning, all the other peaks are attributable to various speed tests. However there is no significant packet loss except occasionally on speed tests.
I would welcome any ideas you might have about the single vs multi thread speed differences, as I need to make a decision about what to do next.
Choices are: remain with Pulse8 and downgrade back to either a 76 or 30 Home package or to look elsewhere.
Many thanks for your help.