FTTC latency changes - Poor Support Responses

I have reported (over the course of a few months) increases in latency on my FTTC connection.

Originally at 7ms, then jumped to 16ms, then to 20ms and most recently 23ms.

As evidence of this last increase I produced a pingplotter graph that showed the exact time of the jump in latency showing hops 0 (my router) and hops 3 (the zen gateway) *edit* hop 2 doesn't respond or may not even exist

The graph clearly shows hop 0 (my router) at a constant 0ms latency.

Two separate support staff have tried to blame my latency increases on my Wireless connection, or my home plug connection (of which I have neither) which I find astonishing and not what I would expect from knowledgable support staff. (it would be a pretty unusual setup that could produce 0ms to hop 0 and yet add 16+ms to the latency before it reached the BT modem).

Anyway...

I have been told that there is no interleave on this line, which is even more puzzling (to me).

Why am I seeing 23ms to hop 3 (zen router) now where as previously I have been seeing 7ms and 16ms?

Edited by deleted (Tue 30-Jul-13 11:46:18)

Good Afternoon,

Im sorry to hear of the issues that you have had, please can you PM me your account details and ill get this looked into.

Just to add a data point for others (I'm not complaining), I noticed my base latency increase from ~10ms to ~20-30ms in recent months, and I can confirm that interleaving has been enabled and significantly increased on my downstream (from xdslcmd info --show):

D: 863 1

863 is the 'interleave depth' for downstream. When the VDSL2 line was installed this was at 1 like upstream here. I assume its just greater VDSL2 uptake.