lost connection, no line drop

[#1]

Hi,
Any ideas what caused this (note time in reverse - top is last entry)?:
11/26/2009  00:47:58 If(ATM1) PPP connection ok !
11/26/2009  00:47:57 ATM1 get IP:87.113.143.13
11/26/2009  00:47:16 ATM1 start PPP            
11/26/2009  00:47:15 If(3) PPP Dial timeout :< 52000
11/26/2009  00:46:23 ATM1 start PPP
11/26/2009  00:46:23 If(ATM1) PPP fail : Timeout in CHAP negotiation
11/26/2009  00:45:41 ATM1 start PPP                       
etc..............
11/26/2009  00:06:14 ATM1 start PPP            
11/26/2009  00:06:13 If(ATM1) PPP fail : Timeout in LCP negotiation
11/26/2009  00:05:23 ATM1 start PPP            
11/26/2009  00:05:23 If(ATM1) PPP fail : Timeout in LCP negotiation
11/26/2009  00:04:31 ATM1 start PPP            
11/26/2009  00:04:28 ATM1 stop PPP            
PPP Connection lost for over 40 minutes, ADSL completely stable.

[#2]

What's your exchange? Is it on this list, particularly the top one?
http://usertools.plus.net/exchanges/mso.php

[#3]

There wasn't any maintenance we did that would have caused this, looks like there might have been some work at your exchange overnight though.

Quote

The Planned Engineering Work is required on the Broadband Nodes within the (MILTON KEYNES) region that support EU's nationwide for completion of (Software Upgrade).