In reply to a post by wheelhouse81:

i was getting 80mbps down 20mbps up with sky without any issues.

It is impossible to get download speeds of 80Mb on FTTC, with any ISP, even Sky.

There are TCP/IP/PPP overheads involved meaning the absolute maximum throughput possible on FTTC is around 77Mb.
A number of users have already pointed this out.

The Zen line rate data shows you consistently have an IP profile that's exactly 96.79% of the sync speed, which is a very predictable figure and even suggests G.INP isn't active on the line.

The Zen line data rate figures only go up to the 19th April 2020 and show the line never reaches 80Mb.
However the BT checker shows

Observed Speeds VDSL
Max Observed Downstream Speed 80
Max Observed Upstream Speed 20
Observed Date 2020-04-23

You were synced at 80Mb down 20Mb up on the 23rd April 2020.
That should give a maximum download speed of 77Mb.

You usually get the same sync speed with any ISP as the line remains the exact same. The only difference in sync speed is usually down to the modem provided by the ISP. Some perform better than others.

What modem are you using? Are you able to log in and post the line statistics?

Edited by j0hn83 (Fri 08-May-20 08:10:31)

In reply to a post by j0hn83:

You were synced at 80Mb down 20Mb up on the 23rd April 2020.
That should give a maximum download speed of 77Mb.

You usually get the same sync speed with any ISP as the line remains the exact same. The only difference in sync speed is usually down to the modem provided by the ISP. Some perform better than others.

What modem are you using? Are you able to log in and post the line statistics?

In general you are right, with one minor caveat.

You only get "the same sync speed" at any re-connection if you are close enough to the FTTC cabinet (via the PCP) to always sync at the maximum 80Mbps. If you can only ever sync at, for example, 68424Mbps or lower then your sync speed will vary with each re-sync and also depending on the stability settings chosen for the connection by the ISP.

Minor caveat? Pedantry of the highest order.

It was pretty obvious by saying "same sync speed" I didn't mean "100% exact same sync speed on every single resync down to the nearest kilobit."

To make you feel better...

*The sync speed won't increase with a change of ISP.
*The sync speed won't decrease with a change of ISP.
*The sync speed will remain relatively similar between ISP's.

*Excluding very small changes caused by varying background noise.

*Except for cases where DLM has been restricting a line on the previous ISP, or the new ISP uses a different DLM policy (speed/standard) and the DLM applies a different profile.
Less relevant to the OP who is likely on an ECI cabinet and Zen use the DLM Speed policy.

Feel free to correct me again if I missed any minor detail.

People are trying to explain to the OP why he is misunderstanding the situation. What you meant may be obvious to you, but could very well have confused the OP even more.

Your defensive over-reaction to my clarification posted for their sake is just that. An over-reaction.

Edit: There is even a fair chance the OP doesn't know what a modem is! They probably have a "router" or "hub" according to their ISP.

Edited by RobertoS (Fri 08-May-20 20:29:14)