Hi
Came across a document from BT Wholesale entitled 'Broadband Max Myths and Legends' Oct 2006, which I thought a useful document. It had this to say on rebooting routers
How many times can my line retrain per day before DLM acts?
This is a BT Wholesale configurable parameter, but currently if a line retrains more than 10 times in any single hour period DLM will take action.
It is therefore inadvisable to manually retrain a line more than 10 times in a single hour as DLM will interpret this as line instability.