On the portal go to My Services, Broadband & SDSL, View Line Data

Hi there
I just fixed something like this for my mum, also with Zen and on FTTC 40/10, line running slow but Zen saying it was fine. Turned out to be a faulty faceplate, connecting to the master socket confirmed this as connection was fine. A new BT faceplate fixed it. Zen reset the profile and has been solid since.

In reply to a post by Black:

Hi there
I just fixed something like this for my mum, also with Zen and on FTTC 40/10, line running slow but Zen saying it was fine. Turned out to be a faulty faceplate, connecting to the master socket confirmed this as connection was fine. A new BT faceplate fixed it. Zen reset the profile and has been solid since.

Not sure on Zen, but with TT one of the first things they ask you to do is remove faceplate and use a plug in filter.

Agree with Burble’s post …. also, an iffy faceplate causing just loss of upstream speed ? Nah …

That's not on the new portal now. There's no useful data in it annoyingly.

Just gone into the old portal.

Found a load of info and it looks like the line is resetting and generally messing about regularly. Noticeably worse during July.

I thought the line speed and zen test speed were out of sync but I'm not so sure. It's only syncing now at the lower speed again.

Sodding connection dropped part way through this.

Modem is TG588V v2. Technicolour I think.

Can't use the broadband without the filter front plate as it means not having the phone line connected and internet doesn't work for some reason when you do that anyway.

Edited by serichards (Tue 08-Aug-23 14:43:44)

is the line completely resetting?

I'd do what Burble suggested for 24 to 48 hours and remove the face plate and use a microfilter in its place, as a test.

Have you access to a spare modem router?

In reply to a post by serichards:

In reply to a post by Zarjaz:

Another option I could think of … something on your LAN side swamping the upload,

Unplug everything, disable wifi, then just use I single wired device for a few hours .. see how that goes

Not that. I can see on the Asus router page what the activity is like.

Oh its an ASUS, that may be the problem. ASUS DSL routers are garbage and often have sync issues, which is frustrating as their plain ethernet routers are excellent.

Do you not have the router Zen provided with your connection to test this?

Wait, I see later you are using their router as a modem? That's not a good setup either as I do not believe their modem has a bridge mode though probably not the cause of your problem.

I'd definitely push to see if Zen will send you a newer router, I know its a free of charge if you sign a new contract, but worth pressing regardless as that modem (router) must be quite old now.

Edited by alexatkin (Tue 08-Aug-23 20:35:20)

I've found another microfilter so I have put that in the phone line to double screen it to see if that changes anything.

I can only use the test socket for more than an hour or two if I can still plug the landline in and have it working. Did try it without a microfilter as I hadn't found the one I've just found and that forced a reset. It can take anything between a few hours a day or two to step down the sync speed which is too long to be without the landline connected.

The asus is rarely troublesome as long as QOS isn't turned on. That seems to make it worse. It's a bit lean on memory by the look of it which won't help.

Checked sync speed from yesterday and it's still 8mb up so far with the new microfilter on the phone line connection.

It continues.

Reducing upload speed but with different dsl modem. Been given a fritzbox. Exactly the same issue. Download speed is the same. Upload speed starts at about 8mb then falls off over a number of days.

Different filters - no change. Test socket no change. Tried 3 different filters in different configurations and all exhibit the same behaviour.

Line is syncing at the full speed but the through put is reducing. Before it was changing sync speed in tandem. That's assuming the line stats info in the Zen page is accurate.

Lift and shift to new ties on the DSLAM would be my next step then.