I am considering replacing my BT Synergy 4500 with a BT 6510. One significant factor is whether the 6510 retains date and time settings afetr a power cut: the Synergy doesn't and resets to 01.01.2000!
The manual for the 6510 doesn't mention this and the operative on the website chat simply referred me to the manual.
Does anyone actually have a 651o and can give me an authoritative answer??