Reccurent disconnections - advice sort

[#1]

Hello all and happy new year.
I have a Plusnet standard BT branded wireless router and have never had any problems.
Within the last 3 or 4 days, my synch light goes from green to flashing amber, before going back to green after 30 secs or so. To me this means its losing its synchronisation. I have replaced the splitter/filter and that has not fixed the problem.
I never lose connection to the router, just to the internet which is becoming a pain in the neck. All Plusnet self help tests have not shown there to be any problems.
I have gone in to my router and discovered the following stats;
                                        since reset    Current 24hrs 
ATM Cell Header Errors:        220                147
ATM Loss of Cell Delineation:  0                    0
DSL Link Retrains:                  3                    2
DSL Training Errors:              177                28 
DSL Training Timeouts:            0                    0
DSL Loss of Framing Failures:  6                    4 
DSL Loss of Signal Failures:    4                    4 
DSL Loss of Power Failures:    0                    0 
DSL Loss of Margin Failures:  4                    4 
DSL Cumulat Err Seconds:      12                    4
DSL Severely Errored Seconds: 6                  4
DSL Corrected Blocks:            545                151
DSL Uncorrected Blocks:        219                144
ISP Connection Establishment: 23                23
I have raised a ticket with Plusnet, but would appreciate any advice.
Many thanks
Matt

[#2]

Hi Matt,
It does indeed sound like your router is dropping synchronisation with the exchange.  Can you possibly try the following for me?
- Try using a different filter
- Ensure that you are connecting directly into your master socket via a filter
- Try using a different modem or router if this is at all possible.
Failing this helping, we can subsequently raise a fault to BT on yuour behalf and get them to investigate your line.