I doubt if the modem cable will help. A replacement one like you have will be easiest for you. If you have been wiring the ring/bell wire on Terminal 3 I suggest you leave it off, unless your phone is a very unusual one these days. See the page on my website about it.

Just a thought! What filtering have you got the phone plugged into?

I have also ordered a better quality modem cable as well.

If you are ordering a Twisted Pair modem cable I got one the same length as my flat Billion cable and lost a couple of meg compared to the flat cable so I swapped back to the flat cable.

I bought an ADSLNation faceplate and high-end modem cable several years ago on ADSL2+, (O2 so no DLM to get upset), and after hours of messing around with four or five dangly filters and bog standard modem cables ended up with two danglies consistently getting higher sync, and all the modem cables better for sync.

Maybe the error rates were higher but they were only FECs so I didn't care.

The faceplate and fancy cable have been in a drawer ever since. They weren't worth sending back, due to the postage cost.

In reply to a post by RobertoS:

Just a thought! What filtering have you got the phone plugged into?

None. I have it wired so that none of the extensions need to have filters.

Which if the filter in the ADSL Nation faceplate has failed would cause trouble. Filters do fail, which is your original question .

Get that new one fitted. Ignore what I was saying about my tests, which resulted in 200-300Kbps difference in sync. If a new faceplate fixes it in 2-3 weeks then we can talk about that then.

But don't connect Terminal 3. Only 2 and 5, and make sure 2 <> 2 and 5 <> 5. A setup of 2 <> 5 and 5 <> 2 is wrong.

Edited by RobertoS (Mon 19-Jun-17 22:53:18)

Okay.

Just fitted the new faceplate and ADSL cable. Here are the stats:

adsl status
--------------------------- ATU-R Info (hw: annex A, f/w: annex A) -----------
Running Mode : G.dmt Annex A State : SHOWTIME
DS Actual Rate : 4800000 bps US Actual Rate : 448000 bps
DS Attainable Rate : 4992000 bps US Attainable Rate : 1168000 bps
DS Path Mode : Interleave US Path Mode : Interleave
DS Interleave Depth : 32 US Interleave Depth : 4
NE Current Attenuation : 50 dB Cur SNR Margin : 9 dB
DS actual PSD : 19. 9 dB US actual PSD : 12. 2 dB
NE Rcvd Cells : 32246 NE Xmitted Cells : 9942
NE CRC Count : 1 FE CRC Count : 0
NE ES Count : 1 FE ES Count : 0
Xdsl Reset Times : 0 Xdsl Link Times : 1
ITU Version[0] : b5004946 ITU Version[1] : 544e0000
ADSL Firmware Version : 05-07-02-08-00-01
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 26 dB Far SNR Margin : 23 dB
CO ITU Version[0] : b5005453 CO ITU Version[1] : 54430000
DSLAM CHIPSET VENDOR : < TSTC >

Doesn't look like there is much difference to the stats from the old one.

One thing I did notice when fitting the new faceplate was that the ring wire was connected so just connected the blue/white and the white/blue.

Did you make sure the ring wire was disconnected at both ends?

I'm pretty sure that I didn't connect the ring wire when I did the extensions but I will double check.