Constantly Losing Sync.....

[#1]

For the last few months I have had an intermittent problem with my connection dropping out then reconnecting.  Looking at my router Log it says "Loss of synchronization"  I dont know whether its a problem with my router ( dont have another to test with) or something more serious like a problem with the phone line  :(.  What's odd is that this only started happening when I switched from my old BB Plus upto 8MB account, which I had been on since I joined plusnet in 2005 over to Broadband Extra in April of this year.  The last few days its been quite bad and is starting to annoy me.
Here is a log for my router from August 23rd showing the problem I think
Mon, 2010-08-23 01:22:58 - Loss of synchronization :6
Mon, 2010-08-23 01:47:58 - Loss of synchronization :7
Mon, 2010-08-23 02:13:59 - Loss of synchronization :8
Mon, 2010-08-23 03:05:30 - Loss of synchronization :9
Mon, 2010-08-23 03:29:30 - LCP down.
Mon, 2010-08-23 03:29:41 - Initialize LCP.
Mon, 2010-08-23 03:29:41 - LCP is allowed to come up.
Mon, 2010-08-23 03:29:48 - CHAP authentication success
Mon, 2010-08-23 03:30:00 - Loss of synchronization :10
Mon, 2010-08-23 03:55:01 - Loss of synchronization :11
Mon, 2010-08-23 04:20:27 - LCP down.
Mon, 2010-08-23 04:20:52 - Initialize LCP.
Mon, 2010-08-23 04:20:52 - LCP is allowed to come up.
Mon, 2010-08-23 04:21:01 - Loss of synchronization :12
Mon, 2010-08-23 04:21:53 - Initialize LCP.
Mon, 2010-08-23 04:21:53 - LCP is allowed to come up.
Mon, 2010-08-23 04:21:56 - CHAP authentication success
Mon, 2010-08-23 04:45:02 - Loss of synchronization :13
Mon, 2010-08-23 05:10:32 - Loss of synchronization :14
Mon, 2010-08-23 05:35:33 - Loss of synchronization :15
Mon, 2010-08-23 05:59:33 - Loss of synchronization :16
Mon, 2010-08-23 06:22:34 - Loss of synchronization :17
Mon, 2010-08-23 17:08:17 - Loss of synchronization :18
Mon, 2010-08-23 17:27:47 - Loss of synchronization :19
Mon, 2010-08-23 17:48:17 - Loss of synchronization :20
Mon, 2010-08-23 18:08:18 - Loss of synchronization :21
Mon, 2010-08-23 18:48:19 - Loss of synchronization :22
Mon, 2010-08-23 19:09:19 - Loss of synchronization :23
Mon, 2010-08-23 19:29:20 - Loss of synchronization :24
Mon, 2010-08-23 20:11:16 - Administrator login successful - IP:192.168.0.2
Mon, 2010-08-23 21:22:52 - Loss of synchronization :25
Mon, 2010-08-23 22:22:53 - Loss of synchronization :26
Mon, 2010-08-23 22:43:53 - Loss of synchronization :27
Mon, 2010-08-23 23:03:54 - Loss of synchronization :28
Mon, 2010-08-23 23:05:24 - Loss of synchronization :29
Mon, 2010-08-23 23:45:55 - Loss of synchronization :30
Mon, 2010-08-23 23:47:25 - Loss of synchronization :31
And here is the Log from most of today - 27th August 2010

Fri, 2010-08-27 09:10:18 - Receive NTP Reply from time-g.netgear.com
Fri, 2010-08-27 09:09:32 - Router start up
Fri, 2010-08-27 13:57:10 - Administrator login successful - IP:192.168.0.2
Fri, 2010-08-27 17:25:01 - Loss of synchronization :1
Fri, 2010-08-27 18:34:02 - Loss of synchronization :2
Fri, 2010-08-27 19:39:49 - Administrator login successful - IP:192.168.0.2
Fri, 2010-08-27 19:40:34 - Loss of synchronization :3
Fri, 2010-08-27 19:59:47 - Administrator login successful - IP:192.168.0.2
Fri, 2010-08-27 20:01:34 - Loss of synchronization :4
Fri, 2010-08-27 20:46:11 - Administrator login successful - IP:192.168.0.2
Fri, 2010-08-27 20:47:05 - Loss of synchronization :5
Fri, 2010-08-27 20:49:49 - LCP down.
Fri, 2010-08-27 20:50:05 - Loss of synchronization :6
Fri, 2010-08-27 20:50:05 - Initialize LCP.
Fri, 2010-08-27 20:50:05 - LCP is allowed to come up.
Fri, 2010-08-27 20:51:06 - Initialize LCP.
Fri, 2010-08-27 20:51:06 - LCP is allowed to come up.
Fri, 2010-08-27 20:51:09 - CHAP authentication success
Fri, 2010-08-27 21:25:42 - Administrator login successful - IP:192.168.0.2
Fri, 2010-08-27 21:26:06 - Loss of synchronization :7
Fri, 2010-08-27 21:47:47 - Administrator login successful - IP:192.168.0.2
Fri, 2010-08-27 21:48:06 - Loss of synchronization :8
Fri, 2010-08-27 21:50:06 - Loss of synchronization :9

                                      upstream      downstream
Connection Speed      7616 kbps 448 kbps
Line Attenuation         30 db       10 db
Noise Margin         8 db         22 db
Speeds seem fine, although i'm not really that bothered about that, as I mostly just browse the internet.
Any thoughts on what might be happening?

[#2]

Seems to be most common overnight though, todays log already:
Sat, 2010-08-28 04:21:44 - Loss of synchronization :12
Sat, 2010-08-28 04:42:44 - Loss of synchronization :13
Sat, 2010-08-28 05:20:45 - Loss of synchronization :14
Sat, 2010-08-28 06:11:46 - Loss of synchronization :15
Sat, 2010-08-28 06:34:42 - Administrator login successful - IP:192.168.0.2
Sat, 2010-08-28 06:34:47 - Loss of synchronization :16

[#3]

28th August
Sat, 2010-08-28 18:35:01 - Loss of synchronization :18
Sat, 2010-08-28 19:19:02 - Loss of synchronization :19
Sun, 2010-08-29 19:19:01 - Loss of synchronization :20
Sun, 2010-08-29 19:45:01 - Loss of synchronization :21
Sun, 2010-08-29 20:08:32 - Loss of synchronization :22
Sun, 2010-08-29 20:35:02 - Loss of synchronization :23
Sun, 2010-08-29 20:59:03 - Loss of synchronization :24
Sun, 2010-08-29 21:23:03 - Loss of synchronization :25
Sun, 2010-08-29 22:03:04 - Loss of synchronization :26
Sun, 2010-08-29 22:27:04 - Loss of synchronization :27
Mon, 2010-08-30 00:07:06 - Loss of synchronization :28
Mon, 2010-08-30 01:32:08 - Loss of synchronization :29
And overnight today
Thu, 2010-09-02 22:16:59 - Loss of synchronization :87
Thu, 2010-09-02 22:23:22 - Send out NTP request to time-g.netgear.com
Thu, 2010-09-02 23:26:31 - Loss of synchronization :88
Fri, 2010-09-03 00:15:02 - Loss of synchronization :89
Fri, 2010-09-03 01:15:33 - Loss of synchronization :90
Fri, 2010-09-03 02:55:35 - Loss of synchronization :91
Fri, 2010-09-03 03:18:05 - Loss of synchronization :92
Fri, 2010-09-03 03:43:36 - Loss of synchronization :93
Fri, 2010-09-03 04:42:07 - Loss of synchronization :94
Fri, 2010-09-03 05:07:08 - Loss of synchronization :95
Fri, 2010-09-03 05:32:08 - Loss of synchronization :96
Anyone hae any ideas on what might be happening?  I might unplug the router for a few days.

[#4]

Hi lowercase,
I've run a few line checks and not getting the same results as yourself, so it's very difficult to diagnose at this point. The drops in sync have not caused any alteration to your IP profile as yet but in order for us to deal with this any further you would, in the first instance, need to raise a fault via faults.plus.net
Jojo

[#5]

The connection drops for a few seconds and comes back...
You mean the phone line and connection is ok?  It must be my equipment then, but I don't have another modem to test it with and if tests are done and it turns out its a problem with my hardware, I think I get a big bill from BT?
jim:quote