If you are happy with it connected to the test socket then there isn't really any harm in that - it doesn't look quite so "finished" but as long as you don't mind that then no issue. Do you also have a phone connected? If so presumably you have used a dangly filter to connect the router/phone?

Ok, fair enough. Yeah, I have both the modem and phone connected via a dangly filter to the test socket.

603 LEFTERS and 3 ES in less than 2 hours on a line that has retx high is shockingly high.

At that continued rate there's absolutely no way the line would hold a 3dB SNRM target.
There was likely either an external noise source, the DSL patch cable was accidentally moved during that time or the MK4 has just broke and is now fit for the bin.

There's no way your line has been seeing that level of LEFTERS/ES everyday with the MK4 connected. The line would have dropped to a 4dB SNRM target (or higher) long ago at those kinds of error numbers.

If there is no need for a landline then I would ditch the MK4.
It's not there to "remove noise" but simply to filter voice off from broadband.

Yeah, I was shocked at those values too, especially the LEFTRS. Unfortunately, there is need for the landline, so I'll just have to make do with the test socket for now. Would it be possible to replace the MK4 with a standard faceplate?

For example, could I replace the SSFP section with the bottom half of this?

Edited by deleted (Thu 19-Jul-18 17:25:46)

It�s got an RF filter it that ain�t in its dangly cousin.

Nope, the front plate of the linked Flea Bay item will not fit your older style NTE.

I have the master socket 5c though? So, what will fit other than the SSFP?

Sorry, brain fart, yep, that�ll fit.

No worries, thanks for confirming. So, is it worth attaching the bottom part then, or is it ok in the test socket? What is your opinion on the MK4 SSFP?

Edited by deleted (Thu 19-Jul-18 20:10:59)

If not fussed about the appearance, just leave it in the test jack.

Don�t think the 5c and it�s associated SSFP are as of as good quality as the MK3 and old NTE5a. Cheap innit.