If it is really stuck then should ne a nice flat line on https://www.thinkbroadband.com/speedtest if other variables are not affecting things

I am on PlusNet and basically get the full 80/20 upload/download IF I pick a server that I know has the capacity to max out my connection. I think it works out at about 78/19 averaged over ~1GB, I sync at 79999/19999 according to the stats from the modem with apparently a slight high attainable.

I am fortunate to work at a UK university looking after a HPC system and have access to servers with 10Gbps connections and the University has an even fatter pipe into JANET. Though truth be told I can max it out from my desktop at work with just a 1Gbps connection.

I have in the past had download speeds very close to 76Mbps with sync of 80 and max achievable at 90ish. However new installs have dropped my max achieveable to around 78 and sync to 76 ...

I am around 450m from the cabinet.

In reply to a post by RobertoS:

Do Plusnet still use their "Current line speed" setting? I think it is still available using this link, but may not be.

That used to get stuck at times in the past, but if you've done a few re-sync's that's unlikely to be the problem.

That link is dead. I've not done any re-syncs since moving in (8 weeks ago). The sync rate started at 58, and crept up to its present value after a few days. Perhaps I should reboot the router ?

Hi Broadbandjockey,

A way to identify the wat is causing the speed limit is to:

Check your BTW IP profile at:
http://speedtest.btwholesale.com/
Run the speedtest, then press the further diagnostics button, enter your phone number etc....

If the BTW IP profile is around 60 mbps then that is the cause of the speed limit.
If a modem resynch does not increase the BTW IP profile, then contact PN to raise the issue with BTW.

If the BTW IP profile is (obviously) higher than 60 mbps, then it is likely that the PN profile is the issue.
I find the easy way to get the PN profile checked and adjusted is to strat a topic on the PN community forums.

In reply to a post by broadbandjockey:

In reply to a post by Chippy_Tea_:

In reply to a post by broadbandjockey:

I've just moved house, and I'm very close to the FTTC cabinet, syncing at close to 78 Mb/s
However, real speedtests etc, and even attempting ftp transfers as tests never get above 60 Mb/s. Upstream I'm syncing at 22 Mb/s, and I get 18-19 Mb/s real world values (As I'd expect)

I sync at 72 Mbps and regularly get the speeds below (wired) i have found different speed tests give different results and many vary a lot, my preference is the test files as i think they are the most accurate way to test.
(i am just a tyre kicker so could be wrong)

My test result (close enough for me) - https://i.postimg.cc/bJHQDx1Y/ffffffff.jpg

The speed test i used above is here - http://speedtest2.aa.net.uk/

I also use TBB test files which gives similar results - https://www.thinkbroadband.com/download

.

I've just run the AA test, 59.5, 18.5, ping of 11ms

It kind of feels like somewhere upstream I have a hard cap of 60!

Have you tried the thinkbroadbasnd test files? - https://www.thinkbroadband.com/download

.

In reply to a post by skandia2:

Hi Broadbandjockey,

A way to identify the wat is causing the speed limit is to:

Check your BTW IP profile at:
http://speedtest.btwholesale.com/
Run the speedtest, then press the further diagnostics button, enter your phone number etc....

Which gives me the following message

1. Downstream Test:

Download Speed : 58.18 Mbps

Your speed test has completed and the results are shown above, however during the test an error occurred while trying to retrieve additional details regarding your service. As a result we are unable to determine if the speed you received during the test is acceptable for your service. Please re-run the test if you require this additional information.

In reply to a post by Chippy_Tea_:

In reply to a post by broadbandjockey:

In reply to a post by Chippy_Tea_:

... nested quotes trimmed ...

I sync at 72 Mbps and regularly get the speeds below (wired) i have found different speed tests give different results and many vary a lot, my preference is the test files as i think they are the most accurate way to test.
(i am just a tyre kicker so could be wrong)

My test result (close enough for me) - https://i.postimg.cc/bJHQDx1Y/ffffffff.jpg

The speed test i used above is here - http://speedtest2.aa.net.uk/

I also use TBB test files which gives similar results - https://www.thinkbroadband.com/download

.

I've just run the AA test, 59.5, 18.5, ping of 11ms

It kind of feels like somewhere upstream I have a hard cap of 60!

Have you tried the thinkbroadbasnd test files? - https://www.thinkbroadband.com/download

.

Yep, just over 3 mins for 1GB, so just under 60 Mb/s?

In reply to a post by broadbandjockey:

Yep, just over 3 mins for 1GB, so just under 60 Mb/s?

It's not quite so simple.

That file is 1 GiB (gibibyte), which is 1024x1024x1024 = 1073741824 bytes. But comms speeds are measured in powers of 10, e.g. 1Mbps is 1,000,000 bits per second.

Now, suppose your transfer took 3 mins and 5 seconds (185 seconds). The payload throughput (not counting headers etc) is:

1024x1024x1024x8 / 185 = 46432078 bps ~= 46.4 Mbps

Given that this is a TCP/IP stream, each 1500-byte datagram carries 1460 bytes of TCP data. So the throughput including TCP/IP headers is about 47.7 Mbps.

In reply to a post by candlerb:

In reply to a post by broadbandjockey:

Yep, just over 3 mins for 1GB, so just under 60 Mb/s?

It's not quite so simple.

That file is 1 GiB (gibibyte), which is 1024x1024x1024 = 1073741824 bytes. But comms speeds are measured in powers of 10, e.g. 1Mbps is 1,000,000 bits per second.

Now, suppose your transfer took 3 mins and 5 seconds (185 seconds). The payload throughput (not counting headers etc) is:
1024x1024x1024x8 / 185 = 46432078 bps ~= 46.4 Mbps

Given that this is a TCP/IP stream, each 1500-byte datagram carries 1460 bytes of TCP data. So the throughput including TCP/IP headers is about 47.7 Mbps.

Your calculation seems reasonable, but I was only going by the timing guides on the download page itself