There was another 0300 call; probably was genuine as it stated correct day, time range and address before call went out of kilter.
Anyway came home this afternoon to find a different call, but again from that 0300 number, from VM telling me the same information but ending by saying "... if all that is ok there is nothing for you to do as the engineer will make the appointment..." I am more relaxed now.
HH4 is just a hub; the modem us a seperate device - that has had the solid DSL light on all the time. Actually streaming, just audio, at the moment and some buffering; guess will need tio reboot HH4 soon.
Edited by athegn (Sun 29-Oct-17 14:16:25)