hio77:
@PaulFindlay good luck, i was shocked to find out the ninjas do not know what "PSTN" is, nor did they know what a NTS is..
Your drop sounds like a move from 17a to 8b, probably due to a port refresh.
What ever you do, do not let a CSR perform a port refresh, This will destroy your DLM profile and you will never see the speeds you once had.
Unless you have had a serious fault dont bother. Been there done that, @hio77 recalls very very well many rage posts about DLM.